CN106481432A - A kind of intelligent fan system for vehicle and its control method - Google Patents

Abstract

The invention relates to the technical field of engines, and discloses an intelligent fan system for vehicles, including an ECU, a pressure source and a variable-angle fan. The variable-angle fan includes a fan main body, a blade torsion angle adjustment mechanism and a blade assembly arranged on the fan main body, The blade assembly includes a blade and a blade shaft, on which a shaft floating block is arranged; the blade shaft is pivotally connected to the main body of the fan; the blade twist angle adjustment mechanism includes an upper cover, a lower cover and a piston, and the upper cover faces one side of the lower cover. There is a pressure source groove on the side, a medium channel is provided on the upper cover, and the piston is slidably sleeved in the pressure source groove to jointly define a pressure source chamber for containing the medium; a spring is provided between the piston and the lower cover; The outer wall of the piston is provided with a toggle part that cooperates with the floating block of the rotating shaft. The intelligent fan system can improve fan efficiency, reduce engine fuel consumption, and make the fan cooling capacity always match the actual working conditions of the engine. The invention also provides a control method of the intelligent fan system.

Description

An intelligent fan system for vehicles and its control method

technical field

The invention relates to the technical field of engines, in particular to an intelligent fan system for vehicles and a control method thereof.

Background technique

The automobile engine must be properly cooled in a high temperature working environment to keep it working at a suitable temperature, so as to meet the requirements of good engine performance, durability and emission environmental protection. The engine cooling system plays a key role here. As a key component of the cooling system, the cooling fan has a lot to do with how well it works, how efficient it is, and how much power it consumes. In the commonly used cooling system at present, the cooling liquid passes through the circulation system, and then dissipates heat through the radiator to cool down the engine. The cooling fan is used to force the radiator to make up air through the wind speed to meet the needs of the engine for moderate cooling.

The air volume of the engine fan basically depends on the level of the wind speed and the size of the wind area. The same wind area, the higher the wind speed, the greater the air volume; the same wind speed, the larger the wind area, the greater the air volume. The wind speed mainly depends on the shape, area, height and speed of the fan blades. The shape design, area, and height of traditional fan blades are fixed values. The faster the fan speed, the faster the wind speed. The wind speed will affect the air volume and noise. For the same air passing area, the higher the wind speed, the greater the air volume; the friction between the airflow, the air and the fan blades, the outer frame, and the heat sink will generate noise. With the same design of the fan and heat sink, the noise will inevitably increase. increase with wind speed. In the prior art, there is also the situation of changing the twist angle of the fan blade, but it is basically realized by manual adjustment.

Contents of the invention

(1) Technical problems to be solved

An object of the present invention is to provide an intelligent fan system for vehicles, which can improve fan efficiency, reduce engine fuel consumption, and make the cooling capacity of the fan always match the actual working conditions of the engine.

Another object of the present invention is to provide a control method for the above intelligent fan system.

(2) Technical solution

In order to solve the above technical problems, the present invention provides an intelligent fan system for vehicles, which includes a pressure source, a variable-angle fan, and an ECU connected to the variable-angle fan. The variable-angle fan includes a fan body, a The blade torsion angle adjustment mechanism of the fan main body and a plurality of blade assemblies, each blade assembly includes a blade and a blade shaft connected to the blade, a shaft floating block is arranged at the free end of the blade shaft, the The rotating shaft floating block is not collinear with the axis of the fan blade rotating shaft; the fan blade rotating shaft is pivotally connected to the fan main body; the blade torsion angle adjustment mechanism includes an upper cover, a lower cover and a The piston between the upper cover and the lower cover, the upper cover is provided with a pressure source groove on the side facing the lower cover, the upper cover is provided with a medium channel communicating with the pressure source groove, and the piston can slide It is arranged in the groove of the pressure source, and jointly defines a pressure source chamber for accommodating the medium; a spring is arranged between the piston and the lower cover, and the two ends of the spring are respectively abutted against the piston and the On the lower cover; on the outer wall of the piston, there is a toggle part that cooperates with the floating block of the rotating shaft.

Wherein, the piston is cylindrical with a closed top, a recess is provided on the top of the cylindrical piston, the pressure source chamber is located in the recess, and an annular track is provided on the outer wall of the cylindrical piston , the center of the circular track is located on the axis of the cylindrical piston, and the floating block of the rotating shaft is slidably connected in the circular track.

Wherein, the piston is cylindrical with a closed top, and a recess is provided on the top of the cylindrical piston, the pressure source chamber is located in the recess, and the outer wall of the cylindrical piston is provided with The ring track corresponding to the floating block of the rotating shaft, and each of the floating blocks of the rotating shaft is slidably connected in the corresponding ring track.

Wherein, it also includes a water temperature sensor arranged on the engine of the vehicle, and the water temperature sensor is connected with the ECU.

Wherein, it also includes a proportional valve arranged at the inlet of the medium channel, and the proportional valve is connected with the ECU.

Wherein, the proportional valve is an electric proportional valve or an electro-hydraulic proportional valve.

Wherein, the number of the springs is multiple.

The present invention also discloses a control method for an intelligent fan system of a vehicle, which includes a normal working mode, and the normal working mode includes:

Step S1, detecting the start signal of the engine, if it is started, the ECU controls the pressure in the medium channel to be the first calibration pressure, so that the torsion angle of the blade is adjusted to the positive minimum value;

Step S2, when it is detected that the temperature of the engine cooling water rises, the ECU controls the pressure in the medium channel to gradually decrease, so that the torsion angle of the blade gradually increases;

Step S3: When it is detected that the temperature of the engine cooling water is stable, the ECU controls the pressure in the medium channel to be 0, so that the twist angle of the blade is adjusted to the positive maximum value.

Wherein, the normal working mode also includes:

Step S4: When it is detected that the temperature of the engine cooling water drops, the ECU controls the pressure in the medium passage to increase gradually, so that the twist angle of the blade gradually decreases.

Among them, it also includes abnormal working mode: when it detects that the temperature of the engine cooling water continues to rise, the ECU controls the pressure in the medium channel to the maximum value, so that the twist angle of the blade is adjusted to the reverse maximum value, and lasts for a predetermined period of time .

(3) Beneficial effects

The intelligent fan system for vehicles and its control method provided by the present invention can timely and continuously adjust the torsion angle of the fan blades through the ECU according to the actual working conditions of the engine, so that the cooling capacity of the fan can always match the actual working conditions of the engine, avoiding the The noise and instantaneous power loss caused by sudden start make the fan efficiency and fan noise the best, and reduce the energy loss of the cooling system, effectively reduce the heat load of the engine, and improve the efficiency of the engine.

Description of drawings

1 is a schematic diagram of an intelligent fan system for a vehicle according to the present invention;

Fig. 2 is a partial sectional view of the variable-angle fan in Fig. 1;

Fig. 3 shows an exploded schematic diagram of an embodiment of the connection relationship between the piston and the rotating shaft slider in Fig. 2; and

Fig. 4 shows an exploded schematic diagram of another embodiment of the connection relationship between the piston and the slider of the rotating shaft in Fig. 2 .

In the figure, 1: fan main body; 2: engine; 3: ECU; 4: pressure source; 5: proportional valve; 6: water temperature sensor; 10: lower cover; 11: medium channel; 12: medium inflow joint assembly; 13: Piston; 14: spring; 15: floating block of rotating shaft; 16: fan blade rotating shaft; 17: blade; 18: upper cover; 19: pressure source chamber; 20: eccentric shaft.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Figures 1 and 2 show a preferred embodiment of a smart fan system for vehicles according to the present invention. As shown in the figure, the intelligent fan system includes a pressure source 4 , a variable-angle fan and an ECU 3 connected to the variable-angle fan 1 . Wherein, the variable-angle fan includes a fan main body 1 , a blade twist angle adjustment mechanism provided on the fan main body 1 and a plurality of blade assemblies. Each blade assembly includes a blade 17 and a blade shaft 16 connected to the blade 17 . A shaft floating block 15 is provided at the free end of the blade shaft 16 . The axis of the shaft floating block 15 and the blade shaft 16 are not collinear. The blade rotating shaft 16 is pivotally connected to the fan main body 1 . The blade twist angle adjustment mechanism includes an upper cover 18, a lower cover 10, and a piston 13 arranged between the upper cover 18 and the lower cover 10 at intervals on the fan main body 1. The upper cover 18 is provided with a pressure source on the side facing the lower cover 10. Groove, the upper cover 18 is provided with a medium channel 11 communicating with the pressure source groove, the piston 13 is slidably sleeved in the pressure source groove, and jointly defines a pressure source chamber 19 for accommodating the medium; specifically, in A joint 12 is provided on the upper cover 18 , and a medium passage 11 is provided on the joint 12 , one end of the medium passage 11 communicates with the pressure source cavity 19 , and the other end of the medium passage 11 communicates with the pressure source 4 . A spring 14 is arranged between the piston 13 and the lower cover 10, and the two ends of the spring 14 abut against the piston 13 and the lower cover 10 respectively, so that the direction of the force of the spring 14 is in line with the direction of the force of the piston 13 by the pressure source chamber. on the contrary. In addition, a toggle portion that cooperates with the floating block 15 of the rotating shaft is provided on the outer wall of the piston 13 . Preferably, the fan main body 1 and the upper cover 18 are integrally structured. .

Specifically, as shown in FIG. 3 , the piston 13 adopts a cylindrical shape with a closed top, and a recess is arranged on the top of the cylindrical piston, and the pressure source chamber 19 is located in the recess. On the outer wall of the cylindrical piston 13, a An annular track of the toggle part is formed, the center of the annular track is located on the axis of the cylindrical piston 13, and the rotating shaft floating block 15 is slidably connected in the annular track.

The rotating shaft floating block 15 is connected to the fan blade rotating shaft 16 through the eccentric shaft 20 , and in this embodiment, the rotating shaft floating block 15 is sleeved on the eccentric shaft 20 . Preferably, the floating block 15 of the rotating shaft is made of non-metallic material such as nylon, so as to avoid direct rigid friction with the ring track.

In addition, the variable-angle fan 1 also includes a proportional valve 5 arranged at the inlet of the medium channel 11 , and the proportional valve 5 is connected with the ECU 3 so as to control the opening of the proportional valve 5 through the ECU 3 . When the pressure source 4 adopts a hydraulic source, the proportional valve 5 preferably adopts an electro-hydraulic proportional valve or other devices that can control the liquid pressure and the flow rate is adjustable. When the pressure source 4 adopts a pneumatic source, the proportional valve 5 preferably adopts an electric proportional valve. Or other devices that can control gas pressure and flow rate.

It should be noted that although a plurality of springs 14 are arranged between the piston 13 and the lower cover 10 in this embodiment, these springs 14 are evenly distributed around the central axis of the lower cover 10 so that the piston 13 is evenly stressed. Those skilled in the art should understand that one spring 14 can also be provided, and this one spring 14 is preferably arranged on the central axis of the lower cover 10 .

The implementation process and principle of the twist angle change of the blade 17 are as follows:

Hydraulic oil (or compressed air) enters the pressure source cavity 19 from the pressure source 4 through the medium channel 11. When the oil pressure (or air pressure value) is greater than the elastic force of the spring 14, the piston 13 is pushed downward under the action of the pressure, and the piston 13 moves downward. The downward linear motion is transformed into the rotational motion of the blade shaft 16 through the mutual cooperation of the shaft slider 15 and the piston 13 , so that the twist angle of the blade 17 connected to the blade shaft 16 changes. When the pressure of the hydraulic oil (or compressed air) decreases, the piston 13 is pushed upward under the elastic force of the spring 14, and the upward linear motion of the piston 13 is transformed into the rotation of the blade shaft 16 through the mutual cooperation between the floating block 15 and the piston 13 movement, so that the torsion angle of the blade 17 connected to the fan blade rotating shaft 16 is returned. The ECU 3 adjusts the opening of the proportional valve 5 to adjust the pressure of the pressure source chamber 19 , and then adjust the twist angle of the blade 17 . The initial angle of the torsion angle of the blade 17 is the maximum positive value, which is the working angle when the air volume of the fan is maximum. At this time, the spring 14 is in the initial state.

The present invention also discloses a control method for an intelligent fan system of a vehicle, which includes a normal working mode, and the normal working mode includes the following steps:

Step S1, detecting the starting signal of the engine 2, if starting, the ECU3 controls the pressure of the medium channel 11 to be the first calibration pressure, so as to adjust the torsion angle of the blade 17 to the positive minimum value α (which may be equal to or close to 0°); specifically Specifically, the ECU 3 controls the opening of the proportional valve 5 to be at the first opening, so that the pressure in the medium channel 11 is adjusted to the first calibration pressure, so as to adjust the twist angle of the vane 17 to the positive minimum value α. Since the water temperature is very low when the engine 2 is started, the radiator basically does not need a fan to make up air for heat dissipation. At this time, the ECU3 controls the proportional valve 5 to the first opening degree, so that the oil pressure (or air pressure) entering the fan is controlled at the first calibration. Pressure, in this state, the spring 14 is compressed to the position where the torsion angle of the blade 17 is positive to the minimum value, and in this state, the power consumption, noise, and air volume of the fan are minimum.

Step S2, when it is detected that the cooling water temperature of the engine 2 is rising, the ECU 3 controls the pressure of the medium channel 11 to gradually decrease, so that the twist angle of the blade 17 gradually increases; 6, the opening of the proportional valve 5 is controlled by the ECU3 to gradually decrease, thereby reducing the oil pressure (or air pressure) entering the fan, and the spring 14 is gradually reset, thereby controlling the torsion angle of the blade 17 to gradually increase, and the air volume of the fan increases accordingly. As the water temperature rises, the cooling capacity gradually increases.

Step S3: After detecting that the temperature of the cooling water of the engine 2 is stable, the ECU 3 controls the pressure of the medium channel 11 to be 0, so that the twist angle of the blade 17 is adjusted to the initial angle (ie, the maximum value in the positive direction); specifically, when the engine 2 After entering the best working state and reaching the thermal balance, the ECU3 controls the opening of the proportional valve 5 to become 0. At this time, the oil (or air) intake of the fan is cut off, the spring 14 is reset, and the torsion angle of the blade 17 becomes the initial angle. At this time, the fan has the largest air volume and the strongest cooling capacity.

Preferably, the normal working mode further includes step S4: when it is detected that the cooling water temperature of the engine 2 drops, the ECU 3 controls the pressure of the medium channel 11 to gradually increase, so that the twist angle of the blade 17 gradually decreases; specifically, when When the load of the engine 2 decreases and the water temperature gradually drops, the ECU3 controls the opening of the proportional valve 5 to gradually increase from 0 according to the signal feedback of the water temperature sensor 6, thereby gradually increasing the oil pressure (or air pressure) entering the fan, and the spring 14 It is gradually compressed again, and then the torsion angle of the blade 17 is gradually reduced, so that the air volume of the fan is gradually reduced, so that the cooling capacity of the fan is always matched with the working state of the engine 2 .

Further, the control method also includes an abnormal working mode: when it is detected that the temperature of the cooling water of the engine 2 continues to rise, the ECU 3 controls the pressure of the medium channel 11 to the maximum value, so that the twist angle of the blade 17 is adjusted to the reverse maximum value , for a predetermined period of time. Specifically, in a special environment such as agricultural machinery, when the radiator of the engine 2 is blocked by sundries and the water temperature continues to rise, when the water temperature reaches the calibrated warning value, the ECU 3 controls the opening of the proportional valve 5 to the maximum value, thereby making the The hydraulic pressure (or air pressure) entering the fan is at its maximum. At this time, the spring 14 is fully compressed. At this time, the torsion angle of the blade 17 becomes the reverse maximum value, so that the wind direction changes, and the fan changes from the suction state to the blowing state. At the same time, the ECU3 can control the proportional valve 5 to open for a predetermined period of time. After the debris is removed, the ECU3 controls the opening of the proportional valve 5 to become 0, and the spring 14 is reset, so that the torsion angle of the blade 17 is reset to the maximum positive direction. value, continue to cool the engine 2.

Example 2:

This embodiment is basically the same as Embodiment 1. For the sake of brevity, in the description process of this embodiment, the same technical features as Embodiment 1 will not be described, and only the differences between this embodiment and Embodiment 1 will be described:

As shown in Figure 4, the piston 13 adopts a cylindrical shape with a closed top, and a recess is arranged on the top of the cylindrical piston, and the pressure source chamber 19 is located in the recess, and a plurality of rings are arranged on the outer wall of the cylindrical piston 13. track, each annular channel is respectively matched with a corresponding one of the rotating shaft sliders 15, that is to say, each rotating shaft slider 15 is slidably connected in the corresponding annular track. In order to ensure that the rotating shaft floating block 15 can be fixed at a preset position, an elastic protrusion (not shown) is provided at the corresponding position of the annular track. For the rotational movement of the blade rotating shaft 16, when the blade rotating shaft 16 reaches a preset position, the rotating shaft floating block 15 is fixed by the elastic protrusion, so that the blade is fixed at a preset angle.

In summary, the intelligent fan system for vehicles provided by the present invention adjusts the torsion angle of the blades 17 through the ECU3 in a timely manner and continuously according to the actual working conditions of the engine, so that the cooling capacity of the fan always matches the actual working conditions of the engine, avoiding The noise and instantaneous power loss caused by the sudden start of the fan maximize the fan efficiency and fan noise, reduce the energy loss of the cooling system, effectively reduce the heat load of the engine, and improve the efficiency of the engine.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. An intelligent fan system for vehicles, characterized in that it includes a pressure source, a variable-angle fan and an ECU connected with the variable-angle fan, and the variable-angle fan includes a fan body, a fan body located on the fan body A blade twist angle adjustment mechanism and a plurality of blade assemblies, each blade assembly includes a blade and a blade shaft connected to the blade, a shaft floating block is arranged at the free end of the blade shaft, and the shaft floating block is connected to the blade shaft The axes of the fan blade rotating shaft are not collinear; the fan blade rotating shaft is pivotally connected to the fan main body; the blade torsion angle adjustment mechanism includes an upper cover and a lower cover arranged at intervals on the fan main body, and an upper cover and a lower cover The upper cover is provided with a pressure source groove on the side facing the lower cover, and the upper cover is provided with a medium channel communicating with the pressure source groove and the pressure source respectively, and the piston can slide Sleeved in the groove of the pressure source, jointly defining a pressure source chamber for containing the medium; a spring is provided between the piston and the lower cover, and the two ends of the spring are respectively abutted against the piston and the On the lower cover; on the outer wall of the piston, there is a toggle part that cooperates with the floating block of the rotating shaft. 2. The intelligent fan system according to claim 1, wherein the piston is cylindrical with a closed top, a recess is arranged on the top of the cylindrical piston, and the pressure source chamber is located in the recess Inside, an annular track is provided on the outer wall of the cylindrical piston, the center of the annular track is located on the axis of the cylindrical piston, and the floating block of the rotating shaft is slidably connected in the annular track. 3. The intelligent fan system according to claim 1, wherein the piston is cylindrical with a closed top, a recess is arranged on the top of the cylindrical piston, and the pressure source chamber is located in the recess Inside, an annular track corresponding to each rotating shaft floating block is provided on the outer wall of the cylindrical piston, and each rotating shaft floating block is slidably connected in the corresponding annular track. 4. The intelligent fan system according to claim 1, further comprising a water temperature sensor arranged on the engine of the vehicle, the water temperature sensor being connected to the ECU. 5. The intelligent fan system according to claim 1, further comprising a proportional valve arranged at the entrance of the medium channel, the proportional valve connected to the ECU. 6. The intelligent fan system according to claim 5, wherein the proportional valve is an electric proportional valve or an electro-hydraulic proportional valve. 7. The intelligent fan system according to any one of claims 1-6, characterized in that there are multiple springs. 8. A control method for an intelligent fan system of a vehicle, comprising a normal working mode, the normal working mode comprising: Step S1, detecting the start signal of the engine, if it is started, the ECU controls the pressure in the medium channel to be the first calibration pressure, so that the torsion angle of the blade is adjusted to the positive minimum value; Step S2, when it is detected that the temperature of the engine cooling water rises, the ECU controls the pressure in the medium channel to gradually decrease, so that the torsion angle of the blade gradually increases; Step S3: When it is detected that the temperature of the engine cooling water is stable, the ECU controls the pressure in the medium channel to be 0, so that the twist angle of the blade is adjusted to the positive maximum value. 9. The control method according to claim 7, wherein the normal working mode further comprises: Step S4: When it is detected that the temperature of the engine cooling water drops, the ECU controls the pressure in the medium passage to increase gradually, so that the twist angle of the blade gradually decreases. 10. The control method according to claim 9, characterized in that it also includes an abnormal working mode: when it is detected that the temperature of the engine cooling water continues to rise, the ECU controls the pressure in the medium channel to the maximum value, so that the blades The twist angle is adjusted to a reverse maximum value for a predetermined period of time.