CN115506914A - Sound-proof housing mounting structure, sound-proof assembly, automobile and sound-proof housing assembling method - Google Patents

Abstract

The embodiment of the application provides a sound-proof shield mounting structure, a sound-proof assembly, an automobile and a sound-proof shield assembling method, wherein the sound-proof shield mounting structure comprises an oil dipstick, an ignition coil, an EGR (exhaust gas recirculation) pipe, an engine, an air filter and a sound-proof assembly, the engine is provided with an oil cover, and the oil dipstick, the ignition coil and the EGR pipe are arranged on the engine; the air filter is connected with the top of the engine; the subassembly that gives sound insulation sets up empty strain with between the engine, the subassembly that gives sound insulation includes first sound insulation and second sound insulation, first sound insulation with second sound insulation is split type structure and interconnect, in order to dodge the dipstick the ignition coil EGR pipe the oil cap and empty strain with the linking area of engine. The sound-proof housing mounting structure of the embodiment of the application is convenient to mount and good in noise reduction effect.

Description

Soundproof cover installation structure, soundproof component, automobile and soundproof cover assembly method

technical field

The invention relates to the technical field of automobiles, in particular to a sound insulation cover installation structure, a sound insulation component, an automobile and a sound insulation cover assembly method.

Background technique

With the continuous progress and development of automobile technology, people have higher and higher requirements for the comfort of automobile driving. Among them, NVH (noise, vibration and harshness) is an important index for people to evaluate automobiles. The engine is the main noise source during the running of the car, and its noise level is an important item in the evaluation of the NVH of the car. When the engine is running, the combustion of the mixture in the combustion chamber will generate a lot of noise, and the combustion noise will be transmitted to the air through the cylinder head and the top of the cylinder head cover. At the same time, when the valve mechanism arranged on the top of the engine reciprocates, the mechanical noise generated by the relative movement and impact between the camshaft and the valve tappet, the valve and the valve seat will also be transmitted to the air through the top of the cylinder head cover. Combustion noise and mechanical noise of the gas distribution mechanism are the main noise sources on the top of the engine. Due to the requirements of lightweight engines, more and more engines use plastic cylinder head covers, which have poor rigidity and large surface area. Combustion noise and mechanical noise pass through The form of structural vibration is transmitted to the surface of the cylinder head cover, and it is very easy to excite the vibration of air particles to form sound waves that radiate to the top of the engine. The rigidity of the cylinder head cover is poor, and its natural frequency is low, and it is easy to generate aerodynamic noise caused by resonance when the engine is running under certain working conditions. Therefore, the noise problem at the top of the engine has become the focus and difficulty of improving the NVH performance of the engine.

However, for the layout of the overhead air filter in the vehicle cabin, conventional noise reduction measures are difficult to achieve due to structural limitations.

Contents of the invention

In view of this, the main purpose of the embodiments of the present application is to provide a sound insulation cover installation structure, a sound insulation assembly, an automobile and a sound insulation cover assembly method that are convenient to install and have a good noise reduction effect.

In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present application is realized in this way:

The first aspect of the embodiment of the present application provides a sound insulation cover installation structure, including:

Dipstick;

Ignition coils;

EGR pipe;

an engine with an oil cap, the oil dipstick, the ignition coil and the EGR pipe are arranged on the engine;

an air filter, the air filter is connected to the top of the engine;

A sound insulation assembly arranged between the air filter and the engine, the sound insulation assembly includes a first sound insulation piece and a second sound insulation piece, the first sound insulation piece and the second sound insulation piece are of split structure and mutually connected to avoid the connection area of the oil dipstick, the ignition coil, the EGR pipe, the oil cap, and the air filter with the engine.

In one embodiment, the second sound insulation member has an avoidance area avoiding the oil dipstick, the ignition coil, the EGR pipe, the oil cover and the connection area, and the first sound insulation member at least covers located in the avoidance zone.

In one embodiment, the first sound insulating member is located on the side of the second sound insulating member away from the engine, and a part of the first sound insulating member is recessed in a direction away from the engine to form an ignition coil avoidance groove, The second sound insulator has an ignition coil avoidance opening communicated with the ignition coil escape groove, a part of the ignition coil protrudes into the ignition coil avoidance groove, and the ignition coil escape opening avoids the ignition coil.

In one embodiment, a part of the second sound insulation member protrudes away from the engine to form an air filter installation area on one side of the avoidance area, and the air filter installation area is close to the avoidance area. The outer side wall of the side has a positioning protrusion extending along the top-to-bottom direction, and the edge of the first sound insulation member has a positioning notch matching the shape of the positioning protrusion, and the positioning protrusion is located in the positioning notch.

In one embodiment, the first sound insulation member includes a heat dissipation channel communicating with the ignition coil escape groove, and one end of the heat dissipation channel extends to the air intake side of the engine.

In one embodiment, the heat dissipation channel is open on a side close to the second sound insulation member, and the second sound insulation member has a heat dissipation opening, and the heat dissipation opening is located at the opening of the heat dissipation channel.

In one embodiment, the first sound insulation member has a first pipeline avoidance hole, the second sound insulation member has a second pipeline avoidance hole communicated with the first pipeline avoidance hole, and the EGR pipe is passed through the The first pipeline avoidance hole and the second pipeline avoidance hole.

In one embodiment, the first sound insulator has a pipe avoidance groove that is recessed toward the direction close to the engine, the first pipe avoidance hole is provided on the bottom wall of the pipe avoidance groove, and the pipe avoidance groove One end of one end extends to the outer side wall of the first sound insulation member, and a part of the EGR pipe is located in the pipe escape groove.

In one embodiment, the first sound insulation member has an open slot passing through the first sound insulation member along the top-to-bottom direction, and the opening groove communicates with the first pipe avoidance hole and extends to the first sound insulation member. of the outer wall.

In one embodiment, the first sound insulation member has an oil dipstick avoidance hole, the second sound insulation member has an oil dipstick avoidance opening, the oil dipstick avoidance hole communicates with the oil dipstick avoidance opening, and the oil dipstick passes through It is arranged in the escape hole of the oil dipstick and the avoidance port of the oil dipstick.

In one embodiment, the second sound insulation member has an oil cap escape hole, and at least a part of the oil cap extends into the oil cap escape hole.

In one embodiment, part of the outer side wall of the oil cap escape hole protrudes to form a positioning surface, and the first sound insulation member has a positioning opening abutting against the positioning surface.

In one embodiment, a part of the air filter protrudes to form a connecting portion, the first sound insulation member has a first air filter avoidance hole, and the second sound insulation member has a first air filter avoidance hole. The connected second air filter avoidance hole, the connecting portion is passed through the first air filter avoidance hole and the second air filter avoidance hole and is connected to the top of the engine.

In one embodiment, the engine includes a wire harness extending along the length of the engine and disposed close to the oil dipstick, and at least a region of the wire harness close to the oil dipstick is located at the bottom of the sound insulation assembly.

In one embodiment, a partial area of the first sound insulation member close to the oil dipstick is recessed toward a side close to the air filter to form a wire harness escape groove, and a partial area of the wire harness is located in the wire harness avoidance groove.

The second aspect of the embodiment of the present application provides a sound insulation assembly, which is the sound insulation assembly of the above-mentioned sound insulation cover installation structure.

In one embodiment, the first sound-insulating member includes a first sound-absorbing module and a sound-insulating module located outside the first sound-absorbing module, the second sound-insulating member includes a second sound-absorbing module, and the first sound-insulating member is located outside the first sound-absorbing module. The side of the second sound insulation member away from the engine.

In one embodiment, the first sound-absorbing module is bonded to the sound-insulating module.

In one embodiment, the sound insulation module includes an asphalt molecular substrate and sound-absorbing particles disposed in the asphalt molecular substrate; and/or,

The first sound-absorbing module and/or the second sound-absorbing module has a plurality of sound-absorbing holes communicating with each other and the outside world; and/or,

The material density of the first sound-absorbing module is smaller than the material density of the second sound-absorbing module.

In one embodiment, part of the area of the second sound-absorbing module is recessed toward the side away from the engine to form a plurality of sound-absorbing slits arranged at intervals, and the width of the sound-absorbing slits gradually increases toward the direction away from the engine. decrease.

The third aspect of the embodiment of the present application provides an automobile, including the above-mentioned installation structure for the sound insulation cover.

The fourth aspect of the embodiment of the present application provides a method for assembling a sound-proof cover, which is used for the installation structure of the above-mentioned sound-proof cover, and the method for assembling the sound-proof cover includes the following steps:

installing the second sound insulation on the engine;

installing the ignition coil and the EGR pipe on the engine;

mounting the first sound insulation on the second sound insulation;

Install the oil dipstick and the air filter on the engine.

The embodiment of the present application provides a sound insulation cover installation structure, a sound insulation assembly, an automobile and a sound insulation cover assembly method. By installing the sound insulation assembly between the air filter and the engine, the transmission of noise can be reduced from the transmission path, effectively reducing the Engine overhead noise. Wherein, both the first sound insulation part and the second sound insulation part are split structures, which can facilitate the installation of the sound insulation component between the air filter and the engine. And the sound insulation components can be adaptively arranged according to the arrangement of the top of the engine and the surrounding parts, so as to avoid the oil dipstick, ignition coil, EGR pipe, oil cap and the connection area between the air filter and the engine. Thus, the overall structure of the installation structure of the sound insulation cover can be made compact, and while meeting the installation requirements of the total height of the automobile cabin, interference between various structures can be avoided, and by adopting a split structure, the sound insulation components can be easily installed in steps Between the air filter and the engine, the difficulty of assembling the installation structure of the sound insulation cover can be reduced, thereby effectively improving the installation efficiency while having a good noise reduction effect.

Description of drawings

Fig. 1 is a structural schematic diagram of a soundproof cover installation structure according to an embodiment of the present application;

Fig. 2 is a structural schematic diagram of the sound insulation assembly in Fig. 1;

Fig. 3 is a structural schematic diagram of the first sound insulation member in Fig. 2;

Fig. 4 is a structural schematic diagram of the bottom of the second sound insulation member in Fig. 2;

Fig. 5 is a schematic diagram of the cooperation relationship between the positioning surface and the positioning opening, the positioning notch and the positioning protrusion in Fig. 2;

Fig. 6 is a schematic diagram of the cooperation relationship between the sound insulation assembly and parts in Fig. 1;

Fig. 7 is a schematic diagram of the cooperation relationship between the engine and the sound insulation assembly in Fig. 1;

Fig. 8 is a partial enlarged view of place A in Fig. 7;

Fig. 9 is a partially enlarged view from another angle of view at point B in Fig. 8, in which only part of the structure is shown for the first sound insulation member;

Fig. 10 is a schematic diagram of the cooperation relationship between the sound insulation assembly and the ignition coil in Fig. 2;

Fig. 11 is a schematic diagram of the cooperative relationship between the first sound-absorbing module, the sound-insulating module and the second sound-absorbing module in another embodiment of the present application;

Fig. 12 is a partial enlarged view of place C in Fig. 11;

Fig. 13 is a flow chart of a method for assembling a soundproof enclosure in yet another embodiment of the present application.

Explanation of reference signs

Oil dipstick 10; ignition coil 20; EGR pipe 30; engine 40; oil cap 41; wiring harness 42; air filter 50; connecting part 51; Heat dissipation channel 61c; first pipe avoidance hole 61d; pipe avoidance groove 61e; opening groove 61f; oil dipstick avoidance hole 61g; positioning port 61h; Module 612; second sound insulation piece 62; escape area 62a; ignition coil escape port 62b; air filter installation area 62c; positioning protrusion 62c'; The avoidance hole 62g; the positioning surface 62g'; the second air filter avoidance hole 62h; the second sound-absorbing module 621; the sound-absorbing seam 621a;

detailed description

In this application, the orientation or positional relationship of "top", "bottom" and "length direction" is based on the orientation or positional relationship shown in Figure 1, and the orientation or positional relationship of "inner" and "outer" is based on Figure 11 The orientation or positional relationship shown. It should be understood that these orientation terms are only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to the application. limits.

An embodiment of the present application provides a sound insulation cover installation structure, please refer to Figure 1 to Figure 6, including oil dipstick 10, ignition coil 20, EGR pipe 30 (Exhaust Gas Recirculation, exhaust gas recirculation pipe), engine 40, air filter 50 and a sound insulation assembly 60 , the engine 40 has an oil cap 41 , and the oil dipstick 10 , the ignition coil 20 and the EGR pipe 30 are arranged on the engine 40 . The air filter 50 is connected to the top of the engine 40 , and the sound insulation assembly 60 is arranged between the air filter 50 and the engine 40 . The sound insulation assembly 60 includes a first sound insulation piece 61 and a second sound insulation piece 62. The first sound insulation piece 61 and the second sound insulation piece 62 are of a split structure and connected to each other to avoid the oil dipstick 10, the ignition coil 20, the EGR pipe 30, the oil The connection area between the cover 41 and the air filter 50 and the engine 40 .

Another embodiment of the present application provides a sound insulation assembly 60, which is the sound insulation assembly 60 of the installation structure of the sound insulation cover described in the embodiment of the application.

Still another embodiment of the present application provides a car, please refer to FIG. 13 , which includes the installation structure of the sound insulation cover described in the embodiment of the present application.

Another embodiment of the present application provides a method for assembling a sound-proof cover, which is used in the installation structure of the sound-proof cover described in the embodiment of the present application. The method for assembling the sound-proof cover includes the following steps:

Step S1: Install the second sound insulation member 62 on the engine 40 .

Step S2: Install the ignition coil 20 and the EGR pipe 30 on the engine 40 .

Step S3: Install the first sound insulation member 61 on the second sound insulation member 62 .

Step S4: Install the oil dipstick 10 and the air filter 50 on the engine 40 . The split structure means that the first sound insulation part 61 and the second sound insulation part 62 are two separate structures, and the first sound insulation part 61 and the second sound insulation part 62 are combined by assembly, and the sound insulation assembly 60 is not an integral structure. .

For the structure in which the air filter 50 is mounted on top, the structure between the air filter 50 and the engine 40 is relatively complicated, and the assembly of the sound insulation assembly 60 is relatively difficult. Therefore, when assembling the installation structure of the sound insulation cover, the second sound insulation member 62 can be installed on the engine 40 before the ignition coil 20 and the EGR pipe 30 are installed, thus, after the ignition coil 20 and the EGR pipe 30 are installed, only The first sound insulation member 61 in the sound insulation assembly 60 needs to be installed. That is to say, the first sound insulation piece 61 and the second sound insulation piece 62 can be installed on the engine 40 step by step, without the need to assemble the first sound insulation piece 61 and the second sound insulation piece 62 into the sound insulation assembly 60, and then install it on the engine. 40 , thereby reducing the difficulty of assembling the sound insulation assembly 60 .

It should be noted that after the installation structure of the sound insulation cover is assembled, the connection method between the first sound insulation member 61 and the second sound insulation member 62 is not limited. For example, a detachable connection method or a non-detachable connection method can be adopted. .

In the related art, for the arrangement form of the overhead air filter 50 in the engine room of the whole vehicle, the air filter 50 is arranged in the direction of the front and rear ends of the top of the engine 40 during the layout design of the automobile air intake system, so that the air inlet of the intercooler is close to the throttle valve. , shorten the intake distance, thereby reducing the intake pressure loss. Moreover, the air filter 50 located at a high place in the engine room is also beneficial to reduce the intake air temperature, improve the performance of the engine 40, and facilitate the drainage and installation of the intake system, so it is generally used in compact engine rooms. However, due to the limitation of the total height of the car cabin, the gap between the bottom of the air filter 50 and the top of the engine 40 is small, the boundary environment is more complicated and the overall noise reduction effect is poor.

However, the present application is to set a sound insulation assembly 60 between the air filter 50 and the engine 40. By installing the sound insulation assembly 60 between the air filter 50 and the engine 40, the transmission of noise can be reduced from the transmission path, effectively reducing the noise of the engine. 40 top noise. Wherein, both the first sound insulation member 61 and the second sound insulation member 62 are split structures, which can facilitate the installation of the sound insulation assembly 60 between the air filter 50 and the engine 40 . And the sound insulation assembly 60 can be adaptively arranged according to the arrangement of the top of the engine 40 and the parts around it, so as to avoid the connection area between the oil dipstick 10 , the ignition coil 20 , the EGR pipe 30 , the oil cap 41 , and the air filter 50 and the engine 40 . Thus, the overall structure of the installation structure of the sound insulation cover can be made compact, while meeting the installation requirements of the overall height of the automobile cabin, interference between various structures can be avoided, and by adopting a split structure, the sound insulation assembly 60 can be easily installed step by step Between the air filter 50 and the engine 40, the difficulty of assembling the installation structure of the sound insulation cover can be reduced, so that the installation efficiency can be effectively improved while having a good noise reduction effect.

It should be noted that, in addition to avoiding the above components, the first sound insulating member 61 and the second sound insulating member 62 can also avoid other components located between the engine 40 and the air filter 50 . For example, the installation structure of the sound insulation cover further includes a phase sensor, and the second sound insulation member 62 has a sensor avoidance hole for avoiding the phase sensor. For another example, the installation structure of the soundproof cover also includes a high-load pipeline and a low-load pipeline, and the second sound insulation member 62 has a high-load avoidance hole and a low-load pipeline to avoid the high-load pipeline and the low-load pipeline respectively. Road avoidance hole.

The manner in which the sound insulation assembly 60 avoids other components in the installation structure of the sound insulation cover can be set according to actual needs. The sound insulation assembly 60 can be formed with a structure for avoiding the above components, or it can be avoided by other means.

For example, referring to FIG. 3 , the second sound insulating member 62 has an avoidance area 62a avoiding the connection area of the oil dipstick 10 , the ignition coil 20 , the EGR pipe 30 , the oil cap 41 and the air filter 50 and the engine 40 , and the first sound insulating member 61 has at least The cover is set in the avoidance area 62a.

Specifically, the second sound insulation member 62 avoids the above-mentioned components through the avoidance area 62a, and the first sound insulation member 61 can be covered on the top side of the avoidance area 62a, or can be covered on the bottom side of the avoidance area 62a. It may extend beyond the avoidance area 62a. Thus, the structural types of the installation structure of the sound insulation cover can be enriched to meet actual needs.

In one embodiment, please refer to body 3, FIG. 4 and FIG. 10 , the first sound insulation member 61 is located on the side of the second sound insulation member 62 facing away from the engine 40 , and part of the first sound insulation member 61 is recessed toward the direction away from the engine 40 The ignition coil avoidance groove 61a, the second sound insulator 62 has an ignition coil avoidance opening 62b communicating with the ignition coil avoidance groove 61a, a part of the ignition coil 20 extends into the ignition coil avoidance groove 61a, and the ignition coil avoidance opening 62b avoids the ignition coil 20.

Specifically, the first sound insulator 61 is located on the top side of the second sound insulator 62, the first sound insulator 61 avoids the ignition coil 20 through the ignition coil avoidance groove 61a formed in the depression, and the second sound insulator 62 avoids the ignition coil 20 through the ignition coil avoidance opening 62b. Coil 20. Therefore, through the communication between the ignition coil avoidance slot 61 a and the ignition coil escape opening 62 b, the sound insulation assembly 60 avoids the ignition coil 20 through cooperation, so that the interference between the sound insulation assembly 60 and the ignition coil 20 can be avoided.

It can be understood that the first sound insulating member 61 may also be provided with a plurality of ignition coil avoidance grooves 61a, and the second sound insulation member 62 may also be provided with a plurality of ignition coil avoidance openings 62b corresponding to the ignition coil avoidance grooves 61a one-to-one. Thereby, multiple ignition coils 20 on the engine 40 can be avoided.

In a specific embodiment, the second sound insulation member 62 has a plurality of ignition coil escape openings 62b, and the ignition coil escape openings 62b are connected to each other.

In one embodiment, please refer to FIG. 4 , the first sound insulation member 61 includes a heat dissipation channel 61 c communicating with the ignition coil escape groove 61 a, and one end of the heat dissipation channel 61 c extends to the intake side of the engine 40 .

Specifically, the heat dissipation channel 61c communicates with the ignition coil avoidance groove 61a, which can prevent the temperature of the top of the ignition coil 20 from rising due to the lack of heat dissipation space on the top of the engine 40 after the sound insulation assembly 60 is installed, and can prevent the temperature of the top of the ignition coil 20 from exceeding the allowable temperature. , it is easy to cause a series of problems such as the increase of the resistance coefficient of the wire of the ignition coil 20, the weakening of the primary current and the secondary voltage transmitted to the spark plug, and the insufficient ignition energy of the spark plug. By extending one end of the heat dissipation channel 61c to the intake side of the engine 40, the heat of the ignition coil 20 can be transferred to the intake side of the engine 40 through the heat dissipation channel 61c, which can effectively prevent the high temperature from causing damage to the insulating material inside the ignition coil 20 and cause ignition. Damage to the coil 20 and problems such as engine 40 misfire and vibration. Therefore, when the vehicle is running, the heat generated by the ignition coil 20 can be dissipated to the outside through the heat dissipation channel 61c, which can solve the problem of difficult heat dissipation of the ignition coil 20, and can be verified by the vehicle temperature field test.

It should be noted that, the orientation of the heat dissipation channel 61c can also be determined according to the specific structure of the sound insulation assembly 60 .

It can be understood that when the first sound insulation member 61 is provided with multiple ignition coil avoidance grooves 61a, the first sound insulation member 61 may also be provided with a plurality of heat dissipation channels 61c communicating with the ignition coil avoidance grooves 61a in one-to-one correspondence.

The heat dissipation channel 61c may only have ports at both ends respectively communicating with the ignition coil avoidance groove 61a and the intake side of the engine 40 , or may also have an opening close to the side of the second sound insulation member 62 .

For example, please refer to FIG. 3 and FIG. 4 , the heat dissipation channel 61c is open on one side close to the second sound insulation member 62 , and the second sound insulation member 62 has a heat dissipation opening 62d located at the opening of the heat dissipation channel 61c. That is to say, the heat dissipation channel 61c has a bottom opening, and the heat dissipation opening 62d of the second sound insulation member 62 communicates with the bottom opening of the heat dissipation channel 61c, thereby further enhancing the heat dissipation effect.

In one embodiment, please refer to FIG. 3 and FIG. 4 , a part of the second sound insulation member 62 protrudes away from the engine 40 to form an air filter installation area 62c on the side of the avoidance area 62a, and the air filter installation area 62c is close to the avoidance area. The outer wall of one side of the area 62a has a positioning protrusion 62c' extending along the top-to-bottom direction, and the edge of the first sound insulation member 61 has a positioning notch 61b matching the shape of the positioning protrusion 62c', and the positioning protrusion 62c' is located in the positioning notch. 61b. In this way, the positioning protrusion 62 c ′ and the positioning notch 61 b can cooperate with each other between the second sound insulating member 62 and the first sound insulating member 61 , so that the first sound insulating member 61 can be accurately positioned and installed on the second sound insulating member 62 .

Specifically, the air filter installation area 62c is an area for placing the air filter 50, that is, the air filter 50 is disposed on the top side of the air filter installation area 62c. The air filter installation area 62c is formed by protruding part of the second sound insulator 62 , the positioning protrusion 62c' of the air filter installation area 62c protrudes laterally, and the positioning protrusion 62c' extends along the top and bottom directions.

The positioning protrusion 62c' and the positioning notch 61b can be snap-engaged, can also be abutted, and can also be other positioning connection methods that cooperate with each other.

The shape matching of the positioning notch 61b and the positioning protrusion 62c' means that the outer dimension of the positioning notch 61b matches the outer dimension of the positioning protrusion 62c', so that the positioning protrusion 62c' can be installed in the positioning notch 61b.

The specific shapes of the positioning notch 61b and the positioning protrusion 62c' can be determined according to the actual situation, for example, the positioning notch 61b is an arc-shaped notch, and the positioning protrusion 62c' is a bar-shaped protrusion extending along the top-to-bottom direction.

It should be noted that the installation range of the air filter 50 may only be within the range of the top side of the air filter installation area 62c, or some structures may extend beyond the range of the top side of the air filter installation area 62c.

In one embodiment, please refer to FIG. 3 and FIG. 4 , the first sound insulation member 61 has a first pipe avoidance hole 61d, the second sound insulation member 62 has a second pipe avoidance hole 62e communicating with the first pipe avoidance hole 61d, and the EGR pipe 30 is pierced in the first pipe avoidance hole 61d and the second pipe avoidance hole 62e.

Specifically, the first sound insulation member 61 avoids the EGR pipe 30 through the first pipe avoidance hole 61d, the second sound insulation member 62 avoids the EGR pipe 30 through the second pipe avoidance hole 62e, and the first pipe avoidance hole 61d and the second pipe avoidance hole 62e They are all through holes and communicate with each other, so that the EGR pipe 30 can easily pass through the sound insulation assembly 60 , thereby facilitating the arrangement of the EGR pipe 30 on the engine 40 .

In one embodiment, please refer to FIG. 2 and FIG. 7 , the first sound insulation member 61 has a pipeline avoidance groove 61e that is sunken toward the direction close to the engine 40, and the first pipeline avoidance hole 61d is provided on the bottom wall of the pipeline avoidance groove 61e. One end of the escape groove 61e extends to the outer wall of the first sound insulation member 61, and a part of the EGR pipe 30 is located in the pipe avoidance groove 61e.

Specifically, a part of the EGR pipe 30 is disposed in and extends along the pipe escape groove 61e, and passes through the first sound insulation member 61 through the first pipe avoidance hole 61d on the bottom wall of the pipe avoidance groove 61e. By setting the pipe escape groove 61e, the height of the EGR pipe 30 relative to the sound insulation assembly 60 can be effectively reduced, and the overall structure of the sound insulation cover installation structure can be made more compact, so as to reduce the size of the sound insulation cover installation structure. to a certain limit.

It should be noted that, the entire area of the EGR pipe 30 may be located in the pipe escape groove 61e within a part of the pipe length, or part of the area within a part of the pipe length may be located in the pipe avoidance groove 61e.

In one embodiment, please refer to FIG. 2 and FIG. 4 , the first sound insulator 61 has an opening groove 61f penetrating through the first sound insulator 61 along the top and bottom direction, and the opening groove 61f communicates with the first pipe escape hole 61d and extends to the first The outer side wall of the sound insulator 61 .

Specifically, the area of the first sound insulation member 61 on both sides of the opening groove 61f is disconnected, and the opening groove 61f communicates with the first pipe escape hole 61d and the outer side wall of the first sound insulation member 61 respectively, so that the first pipe escape hole 61d There can be a certain elastic change in the diameter of the hole. During the process of passing the EGR pipe 30 through the first pipe avoidance hole 61d, the area of the first sound insulation member 61 located at the opening groove 61f can be elastically deformed to a certain extent so that the first pipe avoidance hole The enlarged hole diameter of 61d can facilitate the installation of the EGR pipe 30 .

It should be noted that the size of the opening groove 61f can be determined according to the specific size of the first sound insulation member 61, for example, the width of the opening groove 61f is 4 mm.

In one embodiment, please refer to Fig. 3 to Fig. 6, the first sound insulation member 61 has an oil dipstick escape hole 61g, the second sound insulation member 62 has an oil dipstick avoidance opening 62f, the oil dipstick avoidance hole 61g communicates with the oil dipstick escape opening 62f, The oil dipstick 10 is installed in the oil dipstick escape hole 61g and the oil dipstick avoidance port 62f.

That is to say, the first sound insulation member 61 avoids the oil dipstick 10 through the oil dipstick escape hole 61g, the second sound insulation member 62 avoids the oil dipstick 10 through the oil dipstick avoidance hole 62f, and the oil dipstick avoidance hole 61g communicates with the oil dipstick avoidance opening 62f. Therefore, the oil dipstick 10 can easily pass through the sound insulation assembly 60 , thereby facilitating the arrangement of the oil dipstick 10 on the engine 40 , and avoiding interference between the oil dipstick 10 and the sound insulation assembly 60 .

It should be noted that the oil dipstick escape hole 61g is a through hole, and the specific shape of the oil dipstick escape opening 62f can be determined according to actual needs, for example, the oil dipstick escape opening 62f is an opening extending toward the intake side of the engine 40 .

In one embodiment, please refer to FIG. 3 and FIG. 7 , the second sound insulation member 62 has an oil cap avoidance hole 62g, and at least a part of the oil cap 41 protrudes into the oil cap avoidance hole 62g.

Wherein, the oil cover avoiding hole 62g is a through hole, and the second sound insulation member 62 can avoid the oil cover 41 of the engine 40 through the oil cover avoiding hole 62g. Thus, on the one hand, the second sound insulation member 62 can avoid the oil cap 41 to achieve the purpose of easy installation; on the other hand, the oil cap 41 will not be blocked by the sound insulation assembly 60, which can facilitate refueling.

In one embodiment, please refer to Fig. 3 , Fig. 4 and Fig. 8 , part of the outer wall of the oil cover escape hole 62g protrudes to form a positioning surface 62g', and the first sound insulation member 61 has a positioning opening abutting against the positioning surface 62g' 61h.

Specifically, the first sound insulation member 61 and the second sound insulation member 62 can also be positioned through the positioning opening 61h and the positioning surface 62g' on the outer wall of the oil cover escape hole 62g, and the positioning opening 61h abuts against the positioning surface 62g', It can facilitate the installation of the first sound insulation member 61 on the second sound insulation member 62 .

It should be noted that the specific shapes of the positioning opening 61h and the positioning surface 62g' can be determined according to the actual situation, for example, the positioning opening 61h is an arc-shaped notch, and the positioning surface 62g' is an arc surface whose external dimensions match the arc-shaped notch.

In a specific embodiment, please refer to FIG. 5 , the positioning between the first sound insulating member 61 and the second sound insulating member 62 is carried out through the positioning opening 61h and the positioning surface 62g', the positioning protrusion 62c' and the positioning notch 61b respectively, thus, A positioning effect can be jointly formed in the horizontal direction and the vertical direction of the plane, so as to ensure accurate assembly and positioning between the first sound insulation member 61 and the second sound insulation member 62 .

In one embodiment, please refer to FIG. 3 to FIG. 6 , a part of the air filter 50 protrudes to form the connecting portion 51 , the first sound insulation member 61 has a first air filter avoidance hole 61i, and the second sound insulation member 62 has a connection with the first sound insulation member 61i. The second air filter escape hole 62 h connected to the air filter avoidance hole 61 i , the connecting portion 51 is passed through the first air filter escape hole 61 i and the second air filter escape hole 62 h and is connected to the top of the engine 40 .

Specifically, the first air filter avoidance hole 61i and the second air filter avoidance hole 62h are both through holes, which can make the sound insulation assembly 60 avoid the connection between the air filter 50 and the top of the engine 40, so that the sound insulation assembly 60 can be installed on the air filter 50 and the engine. 40, to avoid interference between the sound insulation assembly 60 and the air filter 50.

It should be noted that the connection part 51 may be a boss or other structures, and the connection part 51 and the engine 40 may be connected by bolts or other fastening methods.

In one embodiment, between step S2 and step S3, the sound insulation cover assembly method further includes:

Fix the high-load pipeline, low-load pipeline, phase sensor, etc. on the cylinder head cover of the engine 40, and install the main wiring harness of the wiring harness 42 in the intake manifold fixing slot of the engine 40.

In a specific embodiment, step S3 specifically includes: passing the first sound insulation member 61 through the first pipe avoidance hole 61d and the opening slot 61f to allow the EGR pipe to pass through, and installing the first sound insulation member 61 on the second sound insulation member 62 .

Thus, the installation of the first sound insulation member 61 can be realized, and the difficulty of installing the sound insulation assembly 60 is reduced.

In a specific embodiment, step S4 specifically includes: passing the oil dipstick 10 through the oil dipstick escape hole 61g and the oil dipstick escape opening 62f, so that the oil dipstick 10 is installed on the engine 40 . The air filter 50 is connected to the engine 40 through the first air filter escape hole 61i and the second air filter escape hole 62h.

Therefore, the oil dipstick 10 and the air filter 50 will not affect the installation of the sound insulation assembly 60, which can avoid the interference of the sound insulation assembly 60 with it, and the problem of difficult assembly due to the soft and easily deformed material ensures the assembly quality and improves the assembly quality. efficiency.

In one embodiment, please refer to FIG. 9 , the engine 40 includes a wire harness 42 extending along the length of the engine 40 and disposed close to the oil dipstick 10 .

Specifically, the wire harness 42 is arranged between the cylinder head cover and the intake manifold of the engine 40 along the length direction of the engine 40 , and the distance between the wire harness 42 and the oil dipstick 10 is small. By making the wire harness 42 area close to the oil dipstick 10 within the coverage of the sound insulation assembly 60, when the oil dipstick 10 is inserted and pulled out to check the oil level, the oil remaining on the oil dipstick 10 will only drip due to the shielding of the sound insulation assembly 60. Dropping on the sound insulation assembly 60 without dripping on the wire harness 42 can avoid affecting the conduction of the wire harness 42 and preventing the engine 40 from working abnormally.

It should be noted that the wire harness 42 may be shielded only by the first sound insulation member 61 , or the wire harness 42 may be shielded by the first sound insulation member 61 and the second sound insulation member 62 together.

In some embodiments, please refer to FIG. 4 , a partial area of the first sound insulating member 61 close to the oil dipstick 10 is recessed toward a side close to the air filter 50 to form a wire harness escape groove 61j, and a partial area of the wire harness 42 is located in the wire harness avoidance groove 61j .

That is to say, the area where the wire harness 42 is close to the oil dipstick 10 can be set in the wire harness escape groove 61j. On the one hand, the wire harness avoidance groove 61j can fix and limit the wire harness 42, which can prevent the wire harness 42 from moving or shifting. On the one hand, the wiring harness 42 can also occupy the inner space of the installation structure of the soundproof cover as little as possible.

It should be noted that, the entire area of the wire harness 42 may be located in the wire harness escape groove 61j within a part of the wire length range, or a part of the wire harness 42 may be located in the wire harness avoidance groove 61j within a part of the wire length range.

In one embodiment, please refer to FIG. 11 , the first sound-insulating member 61 includes a first sound-absorbing module 611 and a sound-insulating module 612 located outside the first sound-absorbing module 611, the second sound-insulating member 62 includes a second sound-absorbing module 621, and the first sound-insulating member 61 is located on the side of the second sound insulation member 62 away from the engine 40 . That is to say, the sound insulation component 60 is made of multiple materials, which can greatly improve the sound insulation effect.

Specifically, the sound insulation module 612 exhibits excellent performance in isolating airborne sound and impact sound due to its high-density characteristic material, and the sound loss inside the sound insulation module 612 is large, and has good wide-band sound insulation performance and high damping performance, especially for The isolation of medium and low frequency noise has an incomparable effect with other materials. At the same time, the sound insulation module 612 has higher strength, which can improve the overall tear strength of the sound insulation assembly 60 . Moreover, the surface of the sound insulation module 612 is smooth, bright in color, has good moisture-proof and flame-retardant properties, avoids the problem of surface porosity when a single polyurethane foam material layer is used, and improves the overall appearance of the structure.

Through the combination of the first sound-absorbing module 611, the sound-insulating module 612 and the second sound-absorbing module 621, the combination effect of sound-absorbing and sound-insulating can be realized on the propagation path of the noise at the top of the engine 40, greatly reducing the transmission of the radiated noise from the top surface of the engine 40 to the cabin, The noise reduction quality of the engine 40 is greatly improved.

It should be noted that the overall thickness of the sound insulation assembly 60 can be comprehensively considered according to the gap between the air filter 50 and the engine 40 and the noise reduction effect to be achieved. For example, the thickness of the sound insulation component 60 is 5±0.5mm, which can reduce the radiated noise on the top surface of the engine 40 by 6dB, and the subjective evaluation in the cabin is excellent.

In one embodiment, the first sound-absorbing module 611 has a plurality of sound-absorbing holes communicating with each other and the outside world.

Specifically, there are a plurality of sound-absorbing holes inside the first sound-absorbing module 611. The sound-absorbing holes are small in diameter and evenly distributed. The first sound-absorbing module 611 has good sound-absorbing performance because of the sound-absorbing hole and is absorbed by the material.

It can be understood that, according to needs, the second sound-absorbing module 621 may also have a plurality of sound-absorbing holes communicating with each other and the outside world.

The material types of the first sound-absorbing module 611 , the second sound-absorbing module 621 and the sound-insulating module 612 can be determined according to actual needs.

For example, the first sound-absorbing module 611 and the second sound-absorbing module 621 are injection-molded with an open-cell slow-resilience polyurethane foam material, and the slow-resilience elastic material has excellent effects of anti-vibration, damping and sound insulation.

It should be noted that the first sound-absorbing module 611 and the second sound-absorbing module 621 may adopt the same density or different densities. For example, the material density of the first sound-absorbing module 611 is smaller than the material density of the second sound-absorbing module 621 . Thus, it can be ensured that the area of the second sound insulating member 62 that is not covered with the first sound insulating member 61 at the top can also ensure a better sound insulation effect by strengthening the material density, and the first sound insulating member 61 can properly The density of the first sound-absorbing module 611 is reduced to increase its internal pores, thereby improving its sound-absorbing effect.

In a specific embodiment, after the comparison and verification of the sound insulation of the target test prototype, the material density of the first sound-absorbing module 611 is 200kg/m ³ , the sound-absorbing grade of a single unit is ≥2, and the sound-insulating performance is ≥20. The second sound-absorbing module 621 The material density is 400kg/m ³ , the sound absorption level of a single unit is ≥ 4, the sound insulation performance is ≥ 30, and it has good flame retardancy and aging resistance.

In a specific embodiment, the sound insulation module 612 includes an asphalt molecular base material and sound-absorbing particles disposed in the asphalt molecular base material.

Wherein, the sound-absorbing particles are substances that can improve the sound-absorbing effect, such as heavy mineral powder. The first sound-absorbing module 611 and the sound-insulating module 612 may be bonded or connected in other ways.

Exemplarily, the sound insulation module 612 is a sound insulation damping felt.

In one embodiment, please refer to FIG. 12 , a part of the second sound-absorbing module 621 is recessed toward the side away from the engine 40 to form a plurality of sound-absorbing slits 621a arranged at intervals, and the width dimension R of the sound-absorbing slits 621a faces away from the engine 40 . direction gradually decreases.

Specifically, the side of the second sound-absorbing module 621 close to the engine 40 has a plurality of sound-absorbing slits 621a, that is, the uneven shape of the sharp slit is formed, and by arranging a plurality of sound-absorbing slits 621a with varying widths R at intervals, the sound-absorbing slits 621a can be more The sound absorption frequency characteristic of the second sound insulation member 62 is well adjusted, thereby increasing the average sound absorption coefficient of the sound insulation assembly 60 , so that the sound insulation assembly 60 has better sound insulation and sound absorption performance. In the description of the present application, descriptions referring to the terms "in one embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" mean that the descriptions described in conjunction with the embodiment or example A specific feature, structure, material, or characteristic is included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples and features of different embodiments or examples described in the present application without conflicting with each other.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.

Claims (22)

1. An acoustic enclosure mounting structure, comprising:

a dipstick;

an ignition coil;

an EGR tube;

an engine having an oil cap, the dipstick, the ignition coil, and the EGR tube being disposed on the engine;

the air filter is connected with the top of the engine;

set up empty strain with sound insulation assembly between the engine, sound insulation assembly includes first sound insulation and second sound insulation, first sound insulation with second sound insulation is split type structure and interconnect, in order to dodge the dipstick ignition coil the EGR pipe the oil cover and empty strain with the connection region of engine.

2. The soundproof cover mounting structure according to claim 1, wherein the second soundproof member has an escape area that escapes the dipstick, the ignition coil, the EGR pipe, the oil cover, and the connection area, and the first soundproof member is provided at least in the escape area.

3. The soundproof cover mounting structure according to claim 1 or 2, wherein the first soundproof member is located on a side where the second soundproof member deviates from the engine, a partial region of the first soundproof member is recessed toward a direction away from the engine to form an ignition coil avoiding groove, the second soundproof member has an ignition coil avoiding opening communicating with the ignition coil avoiding groove, the partial region of the ignition coil extends into the ignition coil avoiding groove, and the ignition coil avoiding opening avoids the ignition coil.

4. The soundproof cover mounting structure according to claim 2, wherein a partial region of the second soundproof member protrudes in a direction away from the engine to form an air filter mounting region on a side of the escape region, an outer side wall of the air filter mounting region on a side close to the escape region has a positioning protrusion extending in a top-bottom direction, an edge of the first soundproof member has a positioning notch matching an outer shape of the positioning protrusion, and the positioning protrusion is located in the positioning notch.

5. The soundproof cover mounting structure according to claim 3, wherein the first soundproof member includes a heat dissipation passage communicating with the ignition coil avoiding groove, one end of the heat dissipation passage extending to an intake side of the engine.

6. The soundproof cover mounting structure according to claim 5, wherein a side of said heat dissipation passage adjacent to said second soundproof member is opened, and said second soundproof member has a heat dissipation port located at the opening of said heat dissipation passage.

7. The soundproof cover mounting structure according to claim 1 or 2, wherein the first soundproof member has a first pipe avoiding hole, the second soundproof member has a second pipe avoiding hole communicating with the first pipe avoiding hole, and the EGR pipe is inserted into the first pipe avoiding hole and the second pipe avoiding hole.

8. The soundproof cover mounting structure according to claim 7, wherein the first soundproof member has a duct avoiding groove recessed toward a direction close to the engine, the first duct avoiding hole is provided on a bottom wall of the duct avoiding groove, one end of the duct avoiding groove extends to an outer side wall of the first soundproof member, and a partial region of the EGR pipe is located in the duct avoiding groove.

9. The soundproof cover mounting structure according to claim 7, wherein the first soundproof member has an open groove penetrating the first soundproof member in a top-bottom direction, the open groove communicating with the first pipe relief hole and extending to an outer side wall of the first soundproof member.

10. The soundproof cover mounting structure according to claim 1 or 2, wherein the first soundproof member has a dipstick avoiding hole, the second soundproof member has a dipstick avoiding opening, the dipstick avoiding hole communicates with the dipstick avoiding opening, and the dipstick is inserted into the dipstick avoiding hole and the dipstick avoiding opening.

11. The soundproof cover mounting structure according to claim 1, 2 or 4, wherein the second soundproof member has an oil cover relief hole into which the oil cover at least a partial area extends.

12. The soundproof cover mounting structure according to claim 11, wherein a part of an outer side wall of the oil cover relief hole is projected to form a positioning surface, and the first soundproof member has a positioning port abutting against the positioning surface.

13. The soundproof cover mounting structure according to claim 1 or 2, wherein a partial area of the air filter protrudes to form a connecting portion, the first soundproof member has a first air filter avoiding hole, the second soundproof member has a second air filter avoiding hole communicating with the first air filter avoiding hole, and the connecting portion is penetratingly provided in the first air filter avoiding hole and the second air filter avoiding hole and connected to the top of the engine.

14. The soundproof cover mounting structure according to claim 1 or 2, wherein the engine includes a wire harness extending in a length direction of the engine and disposed near the dipstick, and at least a region near the dipstick is located at a bottom of the soundproof assembly.

15. The soundproof cover mounting structure according to claim 14, wherein a partial region of the first soundproof member near the dipstick is recessed toward a side near the air filter to form a wire harness escape groove in which the partial region of the wire harness is located.

16. An acoustic baffle assembly characterized in that the acoustic baffle assembly is the acoustic baffle assembly of the acoustic baffle housing installation structure according to any one of claims 1 to 15.

17. The acoustic baffle assembly of claim 16 wherein the first acoustic baffle includes a first sound absorbing module and an acoustic baffle module located outside of the first sound absorbing module, and the second acoustic baffle includes a second sound absorbing module, the first acoustic baffle being located on a side of the second acoustic baffle remote from the engine.

18. The acoustic enclosure of claim 17, wherein the first acoustic module and the acoustic module are bonded.

19. The acoustic baffle assembly of claim 17 wherein the acoustic baffle module comprises a bituminous molecular matrix and acoustic granules disposed in the bituminous molecular matrix; and/or the presence of a gas in the gas,

the first sound absorption module and/or the second sound absorption module are/is provided with a plurality of sound absorption holes which are communicated with each other and are communicated with the outside; and/or the presence of a gas in the gas,

the material density of the first sound absorbing module is less than the material density of the second sound absorbing module.

20. The sound insulation assembly of claim 17 wherein a portion of the second sound absorbing module is recessed toward a side away from the engine to form a plurality of sound absorbing slits spaced apart from each other, the sound absorbing slits having a width dimension that decreases in a direction away from the engine.

21. An automobile comprising the soundproof cover mounting structure according to claim 1.

22. A soundproof cover assembling method for the soundproof cover mounting structure according to claim 1, wherein the soundproof cover assembling method comprises the steps of:

mounting the second baffle on the engine;

mounting the ignition coil and the EGR tube on the engine;

mounting said first baffle member on said second baffle member;

installing the dipstick and the air filter on the engine.

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