WO1998011336A1

WO1998011336A1 - Suction structure for internal combustion engines

Info

Publication number: WO1998011336A1
Application number: PCT/JP1996/002629
Authority: WO
Inventors: Teruhiko Minegishi; Hiroyuki Nemoto; Mitsunori Nishimura
Original assignee: Hitachi, Ltd.; Hitachi Car Engineering Co., Ltd.
Priority date: 1996-09-13
Filing date: 1996-09-13
Publication date: 1998-03-19

Abstract

A structure in which an input shaft constituting a member for connecting a cylindrical switching valve and a rotary mechanism together, and the cylindrical switching valve are brought into contact with each other via a ball-like member. When this structure is employed, the ball-like member serves as a ball joint, so that rotation can be smoothly transmitted even when there is an angle of inclination between the direction of the axis of rotation of the input shaft by which the rotary mechanism for rotating the cylindrical switching valve and the same switching valve are connected, and the direction of the axis of rotation of this switching valve.

Description

Specification

Intake device for internal combustion engine

The present invention relates to an intake device for an internal combustion engine, and more particularly, to an intake device using an intake inertia effect. Background art

Japanese Patent Application Laid-Open Nos. Sho 60-224924, Hei 6-81719, Hei 6-81735, Hei 8-170536, etc. relate to the above technology. is there.

In FIG. 2 of JP-A-60-224924, the position of the opening to the intake pipe is changed by rotating the substantially cylindrical surge tank, and the length of the intake pipe is changed. The output torque of the internal combustion engine can be increased using the inertia effect.

In FIG. 33 of Japanese Patent Application Laid-Open No. 6-81719 and FIG. 3 of Japanese Patent Application Laid-Open No. 6-81735, an on-off valve is provided in the intake pipe, and the internal combustion engine rotates at a low speed. In this case, the on-off valve is closed to increase the length of the intake pipe, thereby increasing the output torque during low-speed rotation.

Japanese Patent Application Laid-Open No. H08-170536 discloses that, of two intake pipes having different lengths, a cylindrical shut-off mechanism is provided in an intake passage at an intermediate portion of a shorter intake pipe. By opening and closing the shut-off mechanism according to the engine speed, it is possible to select whether to use only a long intake pipe or to increase the cross-sectional area of the flow path using both intake pipes. Is increasing.

All of the above prior arts use the inertial effect of the intake of the internal combustion engine to output power. In order to increase the torque, the length of the intake pipe or the cross-sectional area of the flow path is changed. To change these, butterfly valves and cylindrical on-off valves are used.

The butterfly valve consists of a flat valve body and a rotating shaft, which are manufactured separately and connected with screws. The rotating shaft is a long and narrow rod, and a plurality of butterfly valves are attached. In order to prevent rotational sliding from being hindered by bending deformation, not only the rotating shaft but also the butterfly A bearing is also provided between the valve and the butterfly valve. In order to incorporate such a valve body and bearing in the middle of the intake pipe of the intake device, the intake pipe must be divided into two parts, which may reduce dimensional accuracy in assembly. .

On the other hand, the cylindrical one has an opening that penetrates in the radial direction of the cylinder, and the opening and the other part constitute a valve. The rotation of the opening causes intermittent intake air flowing through it. Is done. In this mechanism, since the entire circumference of the cylinder becomes the rotating shaft, there is an advantage that the deflection is not as large as that of a butterfly valve, and that the shaft and the valve can be manufactured in a body. In addition, a hole for inserting a cylindrical on-off valve in the axial direction shall be manufactured integrally with a part of the intake pipe of the suction device, and an assembling method of inserting the cylindrical on-off valve into this hole shall be adopted. This eliminates the need to divide the intake pipe into two parts as in the case of a butterfly valve, and avoids a decrease in radial dimensional accuracy due to the assembly work.

However, in the case of a cylindrical on-off valve, it is necessary to devise a method of fixing in the axial direction, as compared with a case where an elongated rod-shaped shaft member such as a butterfly valve is used as a rotating shaft. In the device described in Japanese Patent Application Laid-Open No. H8-170536, one end of a cylindrical on-off valve is brought into contact with a small hole provided at the bottom of a hole, and an axial direction is used so as not to come off from the small hole using a spring. The power of.

However, in this conventional example, the rotation for rotating the cylindrical on-off valve is performed. No consideration is given to the relationship between the direction of the rotation axis of the connecting member that connects the mechanism and the cylindrical on-off valve and the direction of the rotation axis of the cylindrical opening and closing valve. As a result, if there was a gap between them, that is, if there was an inclination, there was a possibility that rotation would not be smooth. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention provides an intake device for an internal combustion engine having an excellent on-off valve, which can solve the problems that cannot be solved by the above-mentioned conventional technology. That is, in the present invention, the connecting member for connecting the cylindrical on-off valve and the rotation mechanism is brought into contact with the cylindrical on-off valve via a ball-shaped member. As a result, even if there is an inclination between the direction of the rotation axis of the connecting member connecting the rotation mechanism for rotating the circular on-off valve and the cylindrical on-off valve and the direction of the rotation axis of the cylindrical on-off valve, Since the ball-shaped member is a kind of ball joint mechanism, the rotation can be transmitted smoothly. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of an intake device for guiding intake air supplied to an internal combustion engine.

FIG. 2 is a sectional view taken along line aa of FIG.

FIG. 3 is a perspective view of a part of the on-off valve 8.

FIG. 4 is a sectional view taken along the line d--d in FIG.

FIG. 5 is an e-e sectional view of FIG.

FIG. 6 is an enlarged view of a part P in FIG.

FIG. 7 is a cross-sectional view of the valve body portion 801.

FIG. 8 is a cross-sectional view of the valve body portion 801. FIG. 9 is a perspective view of a part of the on-off valve 8. FIG.

FIG. 10 is a sectional view taken along the line f-f in FIG.

FIG. 11 is a cross-sectional view showing a connection portion between the on-off valve 8 and the negative pressure module 9.

FIG. 12 is an enlarged view of a portion Q in FIG.

FIG. 13 is a perspective view of the input shaft 16.

FIG. 14 is a cross-sectional view showing a joint structure between the input shaft 16 and the ball portion 16 1.

FIG. 15 is a cross-sectional view showing a coupling structure between the input shaft 16 and the on-off valve 8. FIG. 16 is a cross-sectional view showing an example of a bearing mechanism of the on-off valve 8. FIG. 17 is a perspective view of the bearing member 21. FIG.

FIG. 18 is a sectional view showing another example of the same mechanism as in FIG. FIG. 19 is a cross-sectional view showing another example of the same mechanism as in FIG. FIG. 20 is a perspective view of the bearing member 30. FIG.

FIG. 21 is a sectional view taken along the line d--d of FIG. 3 similarly to FIG.

FIG. 22 is a sectional view taken along the line d--d of FIG. 3, similarly to FIG. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, examples of the present invention will be described.

In this embodiment, a spark ignition type internal combustion engine using fuel such as gasoline is used as an example, but the present invention can be applied to other types of internal combustion engines such as a self-ignition type internal combustion engine.

The outline of the configuration of the intake device of the internal combustion engine will be described with reference to FIG. 1 and FIG. FIG. 1 is a perspective view of an intake device for guiding intake air supplied to an internal combustion engine (not shown), and FIG. 2 is a cross-sectional view taken along aa of FIG. In FIG. 1, the intake device mainly comprises an intake pipe 2, which guides intake air to the internal combustion engine. An injector 5 is attached to the intake pipe 2 to supply fuel to a combustion chamber 11 of a cylinder of the internal combustion engine shown in FIG. A fuel pipe 4 is attached to the injector 5 to supply fuel.

The intake pipe 2 includes a collector 201 composed of i chambers, a branch 202 having the same number of intake passages as the number of cylinders of the internal combustion engine, and a throttle on-off valve (not shown) for adjusting the amount of intake air. 2 and a flange 204 for connecting to the internal combustion engine block 1 shown in FIG. 2, and these are integrally manufactured.

The branch 200 is further provided with a valve holder 206 and a common volume 207 _(the common volume 207 is a single space that is long in a direction perpendicular to the plurality of branches 202). The number of openings is the same as the number of the branches 202, and the openings are connected to the valve holders 206 corresponding to the respective branches 202. The valve holders 206 are opened and closed. This is a hole-shaped chamber into which the valve 8 is inserted, and has a long space in the direction perpendicular to the plurality of branches 202. At a position corresponding to each of the branches 202, a common space is formed. It has an opening communicating the volume 207 and the branch 202.

The on-off valve 8 is inserted into the hole of the valve holder 206 and assembled to open and close the communication between the common volume 207 and the branch 202.

At one end of the on-off valve 8, a negative pressure module 9 composed of a differential pressure actuator 901 and an electromagnetic valve 902 is connected. The opening and closing valve 8 is driven by a negative pressure module 9. Driving mechanisms such as diaphragm actuators that utilize the pressure difference between the negative pressure inside the intake pipe and the atmospheric pressure during operation of the internal combustion engine are widely used. Negative pressure module 9 uses this as its operating principle A differential pressure actuator 901, which converts the differential pressure into motion, and a solenoid valve 902, which interrupts the pressure to the differential pressure actuator 901, to open and close the on-off valve 8, ie, 0 N — Control 0 F P '.

Then, the above-mentioned components and parts are integrally assembled, and are mounted to the internal combustion engine in that state. As a result, assembling becomes easier and the assembling time can be shortened as compared with the case where each part is attached to an internal combustion engine.

An air-fuel mixture consisting of fuel and suction is burned in a plurality of combustion chambers 11 of the internal combustion engine block 1 shown in FIG. 2, and the generated expansion pressure pushes down the piston 12 to obtain power. The spark plug 3 ignites a spark in the air-fuel mixture, the intake valve 13 introduces intake air into the combustion chamber 11, and the exhaust valve 14 exhausts gas after combustion.

The intake air branches from the collector 201 into a plurality of branches 202 and is introduced into the combustion chamber 11 of the internal combustion engine. The chamber of the common volume 207 communicates with the inside of the branch 202 via the on-off valve 8 and the inside of the same number of branch branches 6 10 as the branches 202.

The valve holder 206 is formed integrally with the branch 202 and the branch branch 61, and is made of a material capable of securing rigidity for the purpose of securing strength. For example, when a metal material such as steel or light metal alloy, or a resin material is used, a material containing a reinforcing material is used.

Since the on-off valve 8 can be manufactured by integral molding, it can be molded in one piece with a resin material, or forged or forged with a light metal alloy. Next, the effect of opening and closing the on-off valve 8 will be described.

When the rotation speed of the internal combustion engine is low, the on-off valve 8 is closed. In this condition, the intake air passes through the chamber of the relatively long branch 202 [tl Inhaled. When the intake air passes through a relatively long pipe, the intake theory has a resonance point at a low frequency from the acoustic theory of the pipe. Therefore, the intake pipe is suitable when the rotation speed of the internal combustion engine is low.

On the other hand, when the rotational speed of the internal combustion engine is high, the on-off valve 8 is kept open. In this state, since it is in a state of being spatially connected to the other branch 202 in the middle of the room of the branch 202, the length of the branch branch 6 10 having a relatively short length and the on-off valve 8 is combined. The inertia effect can be obtained by the number of times of the internal combustion engine corresponding to the resonance frequency of the pipeline. Therefore, the intake pipe is suitable for a region where the rotation speed of the internal combustion engine is small.

Next, the structure of the on-off valve 8 will be described. Third view is a perspective view of a part of the on-off valve 8.

The on-off valve 8 is arranged so as to intersect the direction of the passage of the branch branch 610.

The main configuration of the on-off valve 8 is a valve body portion 801 and a shaft portion 802, and the valve body portion 801 is flat. Also, unlike a general butterfly valve, the shaft portion 802 has a disk shape or a solid round rod shape in which the diameter of the shaft portion 802 is almost the same as the diameter of the valve body portion 801. . Since the shape of the valve body portion 800 and the shaft portion 802 is simple, they can be easily manufactured integrally. For example, the material may be integrally molded as a synthetic resin, or may be integrally molded or forged with a light alloy such as an aluminum alloy. Needless to say, the valve body portion 801 and the shaft portion 802 may be made of different materials.

A groove portion 803 is formed in the shaft portion 802 in the circumferential direction, and a sealing ring 6 is fitted in the groove portion 803. The seal ring 6 is fitted rotatably in the rotation direction of the on-off valve 8. The material of the seal ring 6 is set in consideration of slidability. FIG. 4 is a sectional view taken along the line d--d in FIG.

The outer diameter φ d of the shaft portion 802 is set smaller than the inner diameter ø D of the valve holder 206. The inner diameter φD of the valve holder 206 is set to be larger than the height h of the internal passage of the branch branch 61 0. The operating angle of the valve body portion 81 is represented by Θ shown in the figure, and it is understood that there is no need to rotate the valve portion 90 °.

If the seal ring 6 is provided with a split portion 61 to attach the seal ring 6 to the groove 803 of the on-off valve 8, this position must be changed to the common volume 200 as shown in Fig. 4. When installed on the side, even if there is leakage of intake air, the effect is small.

Next, the relationship between the dimensions of the fitting portion between the groove portion 803 of the on-off valve 8 and the seal ring 6 will be described.

FIG. 5 is an e-e sectional view of FIG. 3, and FIG. 6 is an enlarged view of a portion P in FIG.

The thickness of the seal ring 6 is set smaller than the width of the groove 8 () 3 of the on-off valve 8, and is set so as to maintain the clearance in the axial direction of the on-off valve 8. As shown in FIG. 6, the outer diameter of the seal ring 6 in a free state where it is not inserted into the valve holder 206 is large enough not to be deformed from the inner diameter of the valve holder 206, and the shaft portion 802 The protrusion length is set so that it always protrudes outward from the outside diameter of. Further, the inner diameter of the seal ring 6 when inserted into the valve holder 20 ΰ is set to be larger than the outer shape of the groove portion 803 of the on-off valve 8, thereby creating a radial clearance. When a combination of the opening / closing valve 8 and the seal ring 6 having such a configuration is inserted into the valve holder 206, the seal ring 6 is pressed and fixed to the inner surface of the valve holder 206, and freely. It cannot rotate. Since there is a clearance between the seal ring 6 and the groove 803 of the on-off valve 8, the on-off valve 8 rotates. Becomes

Also, as shown in FIG. 5, the gap in the axial direction of the on-off valve 8 is bent in the radial direction at the groove 803, and has a labyrinth structure with respect to the flow of intake air. Leakage can be minimized.

FIG. 7 is a cross-sectional view of the valve body portion 801 of the on-off valve 8, and shows a cross section d_d in FIG. 3 as in FIG.

An end portion 805 of the valve body portion 800 is inscribed in a circle having an outer diameter φd of the shaft portion 802. The thickness of the valve body portion 801 is a rhombus-like shape that linearly increases from the end portion 805 toward the center. Such a shape can not only secure deformation strength unlike a flat plate having a constant thickness, but also can prevent a sudden increase in resistance to the flow of intake air.

FIG. 8 shows another example of the cross-sectional shape of the valve body 8 01 of the on-off valve 8.

The shape of the step surface of the valve body portion 801 is a spindle shape whose thickness increases in a curved manner from the end portion 805 toward the center. With such a cross-sectional shape, the same effect as that of FIG. 7 is obtained.

FIG. 9 shows another embodiment of the on-off valve 8, and is a perspective view of a part of the on-off valve 8 as in FIG. FIG. 10 is the f-f section iS diagram of FIG. A passage portion 806 having substantially the same cross-sectional shape as the branch branch 61 1 is formed in the opening / closing valve 8 to form an intake passage. The opening and closing of the passage section 806 is performed by rotating the entire on-off valve 8 by the operating angle as shown in FIG. In the case of closing, the working angle Θ may be 90 degrees or less because the inside of the branching branch 6110 and the passage section 806 need only be shut off.

Next, the configuration of the support portion of the on-off valve 8 will be described with reference to FIG. FIG. 11 shows the connection between the on-off valve 8 and the negative pressure module 9 in the section taken along the line c--c in FIG. In FIG. 11, an opening / closing valve 8 is inserted into a valve holder 206 integral with a branch 202, and a negative pressure module 9 is attached to an end face thereof. A fitting hole 807 is provided at an end of the on-off valve 8, and a ball part 161 provided on an end face of the input shaft 16 of the negative pressure module 9 is inserted.

The input shaft 16 is provided with a flange portion 162, which is in contact with the pin portion 80 so that when the flange portion 162 rotates, the pin portion 804 of the on-off valve 8 moves.

The input 籼 16 and the on-off valve 8 are pressed by a spring 20 via a spring receiver 19 in a direction in which both are separated in the axial direction.

A bearing section 15 is provided between the input shaft 16 and the negative pressure module 9, and supports the input shaft 16. A lever 17 and a pin 18 are fixed on the opposite side of the input shaft 16 from the ball section 16 1 .When the input shaft 16 rotates, these also rotate the rotation shaft of the input shaft 16. Rotate as center. The lever 17 has a function of stopping the rotation of the input shaft 16 at a predetermined angle.

On the other hand, the differential pressure actuator 90 1 of the negative pressure module 9 includes a rod 904, a cover 905, a spring 906, a diaphragm 907, a diaphragm receiver 908, and a diaphragm receiver 90. Consists of nine. The tip of the mouth 904 is in contact with the pin 18 so as to move the pin 18. When a negative pressure is supplied to the negative pressure chamber 910 of the differential pressure actuator 901 by the solenoid valve 902 shown in FIG. 1, the diaphragm 907 is moved to the state shown in FIG. The rod 904 moves upward, thereby moving the pin 18 and rotating the input shaft 16. Next, the flange portion 162 of the input shaft 16 rotates to move the pin portion 804 of the on-off valve 8, and the on-off valve 8 rotates. FIG. 12 is an enlarged view of a portion Q in FIG.

When the negative pressure module 9 is mounted on the valve holder 206, it projects cylindrically into the negative pressure module 9 in order to absorb the misalignment that occurs between the on-off valve 8 and the input shaft 16. A portion 903 is provided, and is configured to be fitted with a small clearance with the valve holder 206. The coaxiality can be adjusted by shifting the valve holder 206 and the negative pressure module 9 in the radial direction within the range of the minute gap.

Next, a configuration of a connection portion between the input shaft 16 and the on-off valve 8 will be described.

FIG. 13 is a perspective view of the input shaft 16. The spring receiver 19 and the spring 20 are mounted movably in the direction of the axis of the input shaft 16 between the ball portion 161 and the flange portion 162. In addition, a notch 163 is provided in the flange 162. Either one or both of the ball part 16 1 and the flange part 16 2 of the input shaft 16 are manufactured separately from the input shaft, and attached to the input shaft 16.

FIG. 14 is a cross-sectional view showing the connection between the input shaft 16 and the ball portion 16 1. For example, when the ball part 16 1 is manufactured separately, as shown in Fig. 14, the two parts may be joined by screws 16 4 or they may be joined by welding or pressing. No.

FIG. 15 is a cross-sectional view showing the connection between the human-powered shaft 16 and the on-off valve 8, and a part of the cross-section shown in FIG. 11 is extracted.

When inserting the input shaft 16 into the fitting hole 807 of the on-off valve 8 movably in the axial direction, align the pin 804 of the on-off valve 8 with the notch 163 of the flange 162. . Thereby, the rotation of the input shaft 16 can be transmitted to the on-off valve 8.

Also, the spring 20 presses the spring receiver 1 9 against the on-off valve 8, The other end face of the on-off valve 8 described below is pressed against the valve holder 206 to determine the axial position of the on-off valve 8.

With the above configuration, a dimensional error in the axial direction between the on-off valve 8 and the valve holder 206 and a dimensional difference due to thermal deformation or the like can be absorbed by the expansion and contraction of the spring 20. Further, the fitting hole 807 and the ball portion 161 function as a universal joint, and the inclination of the on-off valve 8 and the input shaft] .6 can be absorbed. Therefore, according to this configuration, a dimensional error between the on-off valve 8, the valve holder 206, and the negative pressure module 9 can be absorbed, and the on-off valve 8 can always be smoothly rotated.

FIG. 16 is a cross-sectional view showing an example of a bearing mechanism at the other end of the on-off valve 8, showing only a part of the cross section taken along the line c-c in FIG.

A projection 808 and a shaft hole 809 are provided at the other end of the on-off valve 8, and a bearing member 21 is fitted into the shaft hole 809. FIG. 7 is a perspective view of the bearing member 21. FIG. A cap 22 is attached to the valve holder 206 by a screw 23, and an airtightness between the two is maintained by an O-ring 24. The cap 22 may be press-fitted or bonded to the valve holder 206 without using the () ring 24.

A metal shaft pin 25 is fixed to the cap 22 and rotatably inserted into the bearing member 21. When the cap 22 is formed of a non-metallic material such as resin, the shaft pin 25 must be made of metal in order to ensure the accuracy and strength of the bearing system. As for the method of fixing the shaft pin 25 to the cap 22, as shown in the figure, the shaft pin 25 provided with a screw may be integrally molded with a resin cap 22, but not shown. The nut having the pin 25 thermally welded and the nut provided with a female thread may be integrally molded, and the shaft pin 25 may be screwed in after that, or the cap 22 itself may be made of a metal having the shaft pin integrated. It may be made of metal.

The bearing member 2 1 is provided with a flange portion 2 11 1, and the shaft pin 25 is provided with a flange portion 2 51, which abuts to generate the spring 20 described in FIG. 15. Subject to axial forces.

FIG. 18 is a cross-sectional view of another example of the same mechanism as in FIG.

A protrusion 808 and a shaft hole 809 are provided at the end of the on-off valve 8 as in FIG. 16, and the bearing member 21 shown in FIG. 17 is fitted thereto. . The end face of the valve holder 2 0 6 and the bearing pin 2 6 is attached, _t The valve holder performs rotational sliding between the shaft pin portion 2 6 1 and the bearing member 2 1 bearing only pins 2 6 A thrust ring 27 is provided between 206 and the bearing member 21. The thrust ring 27 is brought into contact with the flange portion 2] 1 of the bearing member 21 to form the spring 20 as described with reference to FIG. Is generated in the axial direction. The material of the bearing pin 26 is made of metal, similarly to the shaft pin 25 of FIG. I6, and the material of the thrust ring 27 is also made of metal.

FIG. 19 is a cross-sectional view of another example of the same mechanism as in FIG.

A bearing member 30 is fitted to the end of the on-off valve 8 as in FIG. 6, but the bearing member 30 differs from the bearing member 21 shown in FIG. 17 in that a hole is provided. Absent.

FIG. 20 is a perspective view of the bearing member 30. FIG.

Rotational sliding is performed between the bearing pin 28 attached to the end face of the valve holder 206 and the bearing member 30. A spring 29 is provided inside the bearing pin 28, and one end of the spring 29 abuts a thrust receiving surface 28 1 provided on the end face of the bearing pin 28, and the other end abuts the spring receiver 31. The other surface of the spring receiver 31 slides in contact with the bearing member 30 fixed to the on-off valve 8. Spring 29 has spring bearing 31 and bearing member 30 Push open / close valve 8 in the axial direction via. The material of the bearing pin 28, the spring bearing 31 and the bearing member 30 is metal. The method of fixing the bearing pin 28 to the valve holder 206 is the same as that described with reference to FIG. In the case of this example, since the spring 29 generates a fixing force in the axial direction of the on-off valve 8, the spring 20 described with reference to FIGS. 13 to 15 can be omitted. In this case, the opening / closing valve 8 needs to be fixed to the input shaft 16 so as not to come off from the valve holder 206.

FIGS. 21 and 22 show another embodiment of the seal ring 6 of the on-off valve 8 described in FIG. Each is a sectional view taken along the line d--d in FIG.

Fig. 4 illustrates the position of the split part 6 01 of the seal ring 6, but the material of the branch branch 6 10 and the valve holder 206 is made of high-strength material, and the on-off valve 8 is deformed by external force. If the seal ring 6 is made of a resilient material that is easily deformed, a defect may occur in the position shown in FIG. In Fig. 21, if each of them expands thermally in a high temperature atmosphere, the dimensional change in the direction perpendicular to the plane of the opening and closing valve 8 will be large, and the seal ring 6 will protrude into the intake passage. The outer diameter of split part 6 01 of ring 6 becomes larger than valve holder 2 ◦ 6. When the ambient temperature decreases, the dimensions return to their original values.However, the protruding portion of the split portion 600 of the seal ring 6 is caught by the wall of the intake passage, and cannot return to the valve holder 206. I will. Therefore, when such a dimensional change is conceivable, it is preferable that the position of the split portion 60 1 of the seal ring 6 be a portion of the wall other than the intake passage as shown in FIG. For example, in FIG. 22, in the wall of the circumferential surface of the hole holder 206, a projection-like guide 208 is provided in a direction perpendicular to the plane of the paper to guide the split part 601, The split section 60 1 is prevented from rotating in the direction of the intake passage from the wall section. And since this guide 208 is configured so as to close the split portion 601, it is possible to reduce the leakage of intake air between the intake passages.

As described above, the present invention employs a configuration in which an input shaft, which is a connecting member for connecting a cylindrical on-off valve and a rotating mechanism, and a cylindrical on-off valve are brought into contact via a ball-shaped member. As a result, even if there is an inclination between the direction of the rotation axis of the input shaft connecting the rotation mechanism that rotates the cylindrical valve and the cylindrical valve, and the direction of the rotation axis of the cylindrical valve. Since the ball-shaped member forms a kind of ball joint mechanism, the effect that rotation can be transmitted smoothly is obtained.

Furthermore, a seal ring is provided on the on-off valve, and a split portion of the seal ring is provided on the wall of the valve holder into which the on-off valve is inserted, so that the seal ring does not return when the material expands and contracts due to thermal expansion. Failure can be prevented.

Further, according to the present invention, since the above-described components and parts are integrally assembled and attached to the internal combustion engine in that state, assembly becomes easier and time can be shortened as compared with the case where individual parts are attached to the internal combustion engine. This has the effect.

Claims

The scope of the claims

1. An air chamber is provided in common to a plurality of intake pipes for supplying intake air to an internal combustion engine, an intake passage communicating the intake pipe with the air chamber is provided, and an on-off valve capable of shutting off the intake passage. In an intake device for an internal combustion engine provided with: a driving member for operating the on-off valve;

A connecting member for connecting the Hij drive member and the on-off valve,

An internal combustion engine having a ball-shaped member between the connecting member and the on-off valve, wherein the movement between the connecting member and the on-off valve is transmitted via the ball-shaped member Intake device.

2. In Claim 1,

An intake device for an internal combustion engine, wherein the ball-shaped member is fixed to the connecting member, and the opening / closing valve is provided with a hole for inserting the ball-shaped member.

3. In Claim 1,

The on-off valve has the same number of valve portions as the intake passage to open and close the intake passage, and the plurality of valve portions and the rotating shaft portion are a rotating body integrally manufactured. Intake device for an internal combustion engine.

4. In Claim 3,

An intake device for an internal combustion engine, wherein a central portion of the valve portion of the on-off valve is thicker than other portions.

5. In Claim 3,

_ir opening / closing valve has an opening u portion and a wall portion, and a portion facing the intake passage is opposed to either the opening portion or the wall portion by rotation of the opening / closing valve. Intake device.

6. In Claim 3,

The on-off valve is made of resin, and the valve portion and the An intake device for an internal combustion engine, which is manufactured by body molding,

7. In Claim 3,

The intake valve for an internal combustion engine, wherein the on-off valve is made of metal, and the valve portion and the rotary shaft portion are manufactured as a body.

8. In Claim 1,

An air intake device for an internal combustion engine, wherein an opening of the air chamber is provided only in the intake passage.

9. An air chamber is provided in common for a plurality of intake pipes for supplying intake air to the internal combustion engine, an intake passage communicating the intake pipe with the air chamber is provided, and an on-off valve capable of shutting off the intake passage. In the intake device of the internal combustion engine provided with

Providing a cylindrical hole for inserting the on-off valve in the intake passage,

The on-off valve has the same number of valve portions as the intake passage to open and close the intake passage, and the plurality of valve portions and the rotary shaft are integrally formed rotating bodies. A groove for inserting a seal ring is provided on the outer peripheral surface of the shaft portion, and a split portion is provided on a portion of the circumferential surface of the hole of the seal ring facing the wall portion. Intake device for an internal combustion engine.

10. In Claim 9,

A protrusion having a longitudinal direction perpendicular to the intake passage is provided on a circumferential surface of the hole, and the protrusion is inserted into a split portion of the seal ring. apparatus.

1 1. One air chamber is provided in common for a plurality of intake pipes for supplying intake air to the internal combustion engine, and an intake passage communicating the intake pipe and the air chamber is provided, and the intake passage can be shut off. In an intake device of an internal combustion engine provided with a simple on-off valve,

The air chamber has an opening provided only in the intake passage,

A drive device for driving the on-off valve is connected to the on-off valve, An intake device for an internal combustion engine, wherein the intake pipe, the air chamber, the intake passage, the on-off valve, and the drive device are integrated so as to be integrated with the internal combustion engine.

1 2. In claim 11,

A fuel supply device for supplying fuel to the internal combustion engine is provided in the intake pipe, and the intake pipe, the air chamber, the intake passage, the on-off valve, the drive device, and the fuel supply device are integrated with the internal combustion engine. An intake device for an internal combustion engine, which is embodied in an assembled state.