Vehicle control system

Abstract

To provide a vehicle control system which can effectively use or suppress vibration of a compressor mounted on a vehicle when the vehicle is used.SOLUTION: A vehicle control system 1 includes: a compressor 10 mounted on a vehicle; a piezoelectric element 11; an operation information acquisition unit 12 which acquires operation information of the compressor 10; and a control unit 20 which controls operation of the piezoelectric element 11. The control unit 20 is configured to be switchable, based on the operation information of the compressor 10, between a power generation mode in which the piezoelectric element 11 generates electric power by vibration of the compressor 10 and a vibration reduction mode in which electric power is provided to the piezoelectric element 11 to reduce vibration of the compressor 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a control system for a vehicle equipped with a compressor. [Background technology]

[0002] In hybrid and electric vehicles equipped with electric motors for vehicle propulsion, the electric motor is deactivated when the vehicle is stopped, reducing noise when the electric motor is running. However, hybrid vehicles and other vehicles are equipped with electric compressors to enable the use of air conditioning and cooling of various electronic devices regardless of the operating state of the electric motor for driving.

[0003] Therefore, when an electric compressor is installed in a hybrid vehicle or the like, the electric compressor operates even when the electric motor for driving the vehicle is not operating, and the noise caused by the operation of the electric compressor can become a problem. In response to this problem, a configuration for reducing compressor vibration has been proposed (for example, Patent Document 1).

[0004] The electric compressor of Patent Document 1 is equipped with a waveform generating means that generates a waveform that is opposite in phase to the waveform of vibration that is predicted to occur in the machine body when the electric motor of the electric compressor is driven, and is configured to be able to impart vibration of the opposite-phase waveform generated by the waveform generating means to the machine body. Therefore, vibration caused by driving the electric motor of the electric compressor is canceled out by the application of vibration of the opposite-phase waveform, so noise caused by driving the electric motor can be suppressed.

[0005] On the other hand, the cooling device of Patent Document 2 is equipped with a piezoelectric element that converts vibration energy generated by the vibration of the compressor into electrical energy, and a thermoelectric conversion element, and the power source for the thermoelectric conversion element during cooling operation is provided by the electrical energy output from the piezoelectric element. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-215089 [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-23111 Summary of the Invention [Problem to be solved by the invention]

[0007] Although Patent Document 1 discloses a configuration for suppressing vibrations generated by the electric compressor in a vehicle, it does not disclose any use of the vibrations. Furthermore, Patent Document 2 only discloses that the cooling device uses the vibrations of the compressor as a power source for a thermoelectric conversion element. Therefore, there is room for improvement in terms of utilizing and suppressing the vibrations of a compressor mounted on a vehicle.

[0008] Therefore, there is a demand for a vehicle control system that can effectively utilize and suppress vibrations of a compressor mounted on a vehicle when the vehicle is in use. [Means for solving the problem]

[0009] A characteristic configuration of the vehicle control system of the present invention is a vehicle control system having a compressor and a piezoelectric element mounted on the vehicle, and comprising an operation information acquisition unit that acquires operation information of the compressor, and a control unit that controls the operation of the piezoelectric element, and the control unit is configured to be able to switch between a power generation mode in which the piezoelectric element generates power through vibration of the compressor, and a vibration reduction mode in which power is supplied to the piezoelectric element to reduce vibration of the compressor, based on the operation information of the compressor.

[0010] According to this configuration, it is possible to switch between reducing compressor vibration and generating electricity with the piezoelectric element using compressor vibration, depending on the manner in which the vehicle is used. The piezoelectric element is attached, for example, to the joint between the compressor and the vehicle body or to the compressor housing. For example, when noise other than that of the compressor (e.g., road noise) is generated, such as when the vehicle is running, and compressor vibration has little impact on vehicle passengers, a power generation mode that tolerates compressor vibration and uses that vibration to generate electricity is useful. On the other hand, when the interior of the vehicle is quiet, such as when the vehicle is stopped or powered, and compressor vibration is likely to cause noise, a vibration reduction mode that applies power to the piezoelectric element to reduce compressor vibration is useful.

[0011] In this way, the vehicle control system of the present invention can effectively switch between a power generation mode that utilizes compressor vibration and a vibration reduction mode that reduces compressor vibration, making it a system that can effectively utilize and suppress compressor vibration. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic diagram of a control system for a vehicle according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing a control flow according to the control system of the first embodiment. [Figure 3] FIG. 10 is a schematic diagram of a control system for a vehicle according to a second embodiment. [Figure 4] FIG. 10 is a diagram showing a control flow according to a control system of a second embodiment. [Figure 5] FIG. 10 is a diagram showing a control flow according to a control system of a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of a vehicle control system according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiment, and various modifications are possible without departing from the spirit and scope of the present invention.

[0014] [First embodiment] [Basic configuration] As shown in FIG. 1, a vehicle control system 1 (hereinafter referred to as "control system 1") includes a compressor 10 and a piezoelectric element 11. The compressor 10 is mounted on the vehicle, and the piezoelectric element 11 is disposed in contact with the compressor 10. In the vehicle, the compressor 10 is disposed midway through a refrigerant circuit through which a refrigerant circulates, and the refrigerant circuit is configured to be able to exchange heat with a separately provided coolant circuit. Note that the state in which the piezoelectric element 11 and the compressor 10 are in contact with each other includes, for example, a state in which the piezoelectric element 11 is directly attached to the main body of the compressor 10 and in contact with it, and a state in which the piezoelectric element 11 is attached to a mounting portion between the compressor 10 and the vehicle body when the compressor 10 is disposed in the vehicle and in contact with it.

[0015] The control system 1 further includes an operation information acquisition unit 12 that acquires operation information of the compressor 10, a running state acquisition unit 14 that acquires the running state of the vehicle, and a control unit 20 that controls the operation of the piezoelectric element 11. The control unit 20 is configured to be able to switch between a power generation mode in which the piezoelectric element 11 generates power by vibration of the compressor 10 and a vibration reduction mode in which power is supplied to the piezoelectric element 11 to reduce vibration caused by the compressor 10, based on the operation information of the compressor 10 acquired by the operation information acquisition unit 12 and the running information of the vehicle acquired by the running state acquisition unit 14.

[0016] Specifically, in the power generation mode, vibration energy due to the vibration of the compressor 10 is converted into electrical energy by the piezoelectric element 11 to generate power. The power generated by the vibration of the compressor 10 is charged, for example, to a main battery or a sub-battery. This power may be used as a power source for driving the vehicle, for the air conditioner, for the vibration reduction mode, etc. In the vibration reduction mode, power is supplied to the piezoelectric element 11 to vibrate the piezoelectric element 11, thereby reducing the vibration caused by the compressor 10. More specifically, in the vibration reduction mode, vibrations transmitted to the vehicle cabin are reduced by applying vibrations from the piezoelectric element 11 that are in the opposite phase to the vibrations of the compressor 10. The vibration of the piezoelectric element 11 is controlled by the control unit 20.

[0017] In this embodiment, the rotation speed of the compressor 10, which is an index of the magnitude of vibration of the compressor 10, is used as the operation information of the compressor 10. As an example, the rotation speed of the compressor 10 can be acquired based on the power supplied to the compressor 10 (in other words, the control value of an ECU (Electronic Control Unit)), but the method of acquiring the rotation speed of the compressor 10 is not limited to this. Below, a control flow in the control system 1 will be explained with reference to FIG. 2. The following control flow is executed by the control unit 20 based on the piezoelectric element 11, the operation information of the compressor acquired by the operation information acquisition unit 12, and the vehicle driving information acquired by the driving state acquisition unit 14.

[0018] In step #1, it is determined whether the vehicle is running based on the vehicle running state acquired by the running state acquisition unit 14. Specifically, if the vehicle speed exceeds a predetermined speed (e.g., 0 to 1 km / h), it is determined that the vehicle is running (Yes), and the process proceeds to step #2. If the vehicle speed is equal to or less than a predetermined speed (e.g., 0 to 1 km / h), it is determined that the vehicle is stopped (No), and the process proceeds to step #6. In step #2, it is confirmed whether the compressor 10 is operating based on the operation information of the compressor 10 acquired by the operation information acquisition unit 12. If it is determined that the compressor 10 is operating (Yes) in step #2, the rotation speed of the compressor 10 is compared with a first set value in step #3. Here, the first set value is, for example, 8000 rpm. If it is determined that the rotation speed of the compressor 10 exceeds the first set value (Yes) in step #3, the vibration reduction mode is controlled in step #4. In the vibration reduction mode, power is supplied to the piezoelectric element 11, and the piezoelectric element 11 is controlled to generate vibrations that are in the opposite phase to the vibrations of the compressor 10. In this way, in the vibration reduction mode, the vibrations of the compressor 10 are reduced by the vibrations of the piezoelectric element 11.

[0019] If the operation of the compressor 10 cannot be confirmed in step #2 (No) or if it is determined in step #3 that the rotation speed of the compressor 10 is equal to or lower than the first set value (No), control is performed in the power generation mode in step #5. That is, in the power generation mode, power is generated by the piezoelectric element 11 that receives vibration from the compressor 10. Note that the power generation mode is a mode in which power is not applied to the piezoelectric element 11, and the vibration reduction mode is a mode in which power is applied to the piezoelectric element 11. Therefore, in the control system 1, the power generation mode is set as the initial mode, and switching from the power generation mode to the vibration reduction mode and vice versa is performed depending on the operating state of the compressor 10 (the rotation speed of the compressor 10 in this embodiment).

[0020] On the other hand, if the vehicle speed is equal to or lower than a predetermined speed (e.g., 0 or 1 km / h) in step #1, it is determined that the vehicle is stopped, and the process proceeds to step #6. In step #6, it is determined whether the compressor 10 is operating. If it is determined in step #6 that the compressor 10 is operating (Yes), it is determined in step #7 whether a silent mode, which will be described later, is being executed. If it is determined that the silent mode is not being executed (No in step #7), the rotation speed of the compressor 10 is compared with a second set value in step #8. Here, the second set value is a value smaller than the first set value, for example, 3000 rpm. If it is determined in step #8 that the rotation speed of the compressor 10 exceeds the second set value, control of the vibration reduction mode is performed in step #9. Here, when the vehicle is stopped, the vibration of the compressor 10 is more likely to cause noise than when the vehicle is moving, so it is preferable that the vibration of the compressor 10 be smaller than when the vehicle is moving. In this embodiment, the second set value is set to a value smaller than the first set value. Therefore, when the vehicle is stopped, even if the rotation speed of the compressor 10 is so low that the mode would not be switched to the vibration reduction mode if the vehicle was running (i.e., the vibration of the compressor 10 is small), control of the vibration reduction mode can be performed, thereby reducing the vibration of the compressor 10 and reducing noise.

[0021] If the operation of the compressor 10 is not confirmed in step #6 (No), or if the rotation speed of the compressor 10 is determined to be equal to or less than the second set value in step #8 (No), the power generation mode is controlled in step #10.

[0022] The silent mode, whether or not to execute it, is now described in step #7. The silent mode is a mode in which the power generation mode is manually switched to the vibration reduction mode regardless of the operating state of the compressor 10. That is, the control unit 20 is configured to be manually switchable from the power generation mode to the vibration reduction mode. By manually switching from the power generation mode to the vibration reduction mode, the vibration of the compressor 10 is suppressed by the piezoelectric element 11.

[0023] For example, when preparing to drive a vehicle in a residential area at night, it is preferable to suppress the vibration of the compressor 10 as much as possible. Therefore, the vehicle user can activate the silent mode at any time. Activating the silent mode allows the vehicle to switch from the power generation mode to the vibration reduction mode, so that vibration of the compressor 10 can be suppressed and noise caused by the compressor 10 can be reduced beforehand, regardless of the operating state of the compressor 10.

[0024] Second Embodiment In the second embodiment, as shown in FIG. 3, the control system 1 includes, in addition to the operation information acquisition unit 12, an external information acquisition unit 15 that acquires information based on an external device (not shown) (hereinafter referred to as "external information"). The control system 1 changes the control mode of the piezoelectric element 11 by comparing the operation information of the compressor 10 with the external information acquired by the external information acquisition unit 15. In the second embodiment, the operation information of the compressor 10 is the noise level of the compressor 10, and the external information is a noise level based on the air volume sent out from an air conditioner (not shown) mounted on the vehicle (hereinafter referred to as "noise level inside the air-conditioned compartment"). The other configurations are the same as those of the first embodiment. Below, the control flow in the control system 1 will be explained based on FIG. 4.

[0025] In step #11, it is determined whether the vehicle is moving based on the vehicle's driving state acquired by the driving state acquisition unit 14. Specifically, if the vehicle speed exceeds a predetermined speed (e.g., 0 to 1 km / h), it is determined that the vehicle is moving (Yes), and the process proceeds to step #12. If the vehicle speed is equal to or less than a predetermined speed (e.g., 0 or 1 km / h), it is determined that the vehicle is stopped (No), and the process proceeds to step #15. In step #12, the noise value of the compressor 10 is compared with the noise value in the air-conditioned compartment. Here, the noise value (noise value of the compressor 10) acquired by the operation information acquisition unit 12 is the value of noise generated mainly by the vibration of the compressor 10, and the noise value tends to increase as the vibration of the compressor 10 increases. The operation information acquisition unit 12 may be configured to be able to measure the noise value of the compressor 10, for example, by including a sound level meter, or may be configured to be able to calculate the noise value based on the power supplied to the compressor 10, etc. The noise level inside the air-conditioned compartment acquired by the external information acquisition unit 15 is, for example, the value of noise such as wind noise. The air conditioning device of the vehicle is configured, for example, by an HVAC (Heating, Ventilation, and Air Conditioning) system, and the noise level increases as the air volume from the air conditioning device increases. The noise level inside the air-conditioned compartment may be an approximate value based on the air volume, or may be a value measured by a separately provided sound level meter (an example of the external information acquisition unit 15).

[0026] If it is determined in step #12 that the noise level of the compressor 10 exceeds the noise level inside the air-conditioned room (Yes), control in vibration reduction mode is performed in step #13. In the vibration reduction mode, power is supplied to the piezoelectric element 11, causing the piezoelectric element 11 to vibrate in an opposite phase to the vibration of the compressor 10. In this way, in the vibration reduction mode, the vibration of the compressor 10 is reduced by the vibration of the piezoelectric element 11.

[0027] If it is determined in step #12 that the noise level of the compressor 10 is equal to or lower than the noise level in the air-conditioned room (No), control is performed in the power generation mode in step #14. That is, in the power generation mode, power is generated by the piezoelectric element 11 that is subjected to vibration from the compressor 10. Note that in this embodiment as well, the power generation mode is a mode in which power is not applied to the piezoelectric element 11, and the vibration reduction mode is a mode in which power is applied to the piezoelectric element 11. Therefore, the control system 1 sets the power generation mode as the initial mode, and switches from the power generation mode to the vibration reduction mode and from the vibration reduction mode to the power generation mode depending on the operating state of the compressor 10 (in this embodiment, the rotation speed of the compressor 10).

[0028] On the other hand, if in step #11 the vehicle speed is equal to or lower than a predetermined speed (for example, 0 or 1 km / h), it is determined that the vehicle is stopped and the process proceeds to step #15. In step #15, it is confirmed whether silent mode is being executed. If it is determined that silent mode is not being executed (step #15: No), in step #16 the noise level of the compressor 10 is compared with the noise level inside the air-conditioned room. If it is confirmed in step #16 that the noise level of the compressor 10 exceeds the noise level inside the air-conditioned room (Yes), control of the vibration reduction mode is performed in step #17.

[0029] If it is determined in step #16 that the noise level of the compressor 10 is equal to or lower than the noise level in the air-conditioned room (No), control in the power generation mode is performed in step #18.

[0030] If the execution of the silent mode is confirmed in step #15 (Yes), the mode is switched from the power generation mode to the vibration reduction mode in step #17 regardless of the operating state of the compressor 10. That is, in this embodiment as well, the control unit 20 is configured to be able to manually switch from the power generation mode to the vibration reduction mode. By manually switching from the power generation mode to the vibration reduction mode, the vibration of the compressor 10 is suppressed by the piezoelectric element 11.

[0031] Third Embodiment In the third embodiment, as in the second embodiment, the control system 1 shown in Fig. 3 compares the operation information of the compressor 10 with external information to change the control mode of the piezoelectric element 11. However, the third embodiment differs from the second embodiment in that the operation information of the compressor 10 is the rotation speed and noise level of the compressor 10. The control flow in the control system 1 will be described below with reference to Fig. 5.

[0032] In step #21, it is determined whether the vehicle is running based on the vehicle running state acquired by the running state acquisition unit 14. Specifically, if the vehicle speed exceeds a predetermined speed (e.g., 0 to 1 km / h), it is determined that the vehicle is running (Yes), and the process proceeds to step #22. If the vehicle speed is equal to or lower than a predetermined speed (e.g., 0 or 1 km / h), it is determined that the vehicle is stopped (No), and the process proceeds to step #27. In step #22, it is confirmed whether the compressor 10 is operating based on the operation information of the compressor 10 acquired by the operation information acquisition unit 12. If it is determined that the compressor 10 is operating (Yes) in step #22, the rotation speed of the compressor 10 is compared with a first set value in step #23. Here, the first set value is, for example, 8000 rpm. If it is determined that the rotation speed of the compressor 10 exceeds the first set value (Yes) in step #23, the vibration reduction mode is controlled in step #25. In the vibration reduction mode, power is applied to the piezoelectric element 11 to vibrate the piezoelectric element 11 in an anti-phase with the vibration of the compressor 10. In this way, in the vibration reduction mode, the vibration of the compressor 10 is reduced by the vibration of the piezoelectric element 11.

[0033] If the operation of the compressor 10 cannot be confirmed in step #22 (No), control is performed in the power generation mode in step #26. If it is determined in step #23 that the rotation speed of the compressor 10 is equal to or lower than the first set value (No), the noise level of the compressor 10 is compared with the noise level inside the air-conditioned room in step #24. If it is determined in step #24 that the noise level of the compressor 10 exceeds the noise level inside the air-conditioned room (Yes), control is performed in the vibration reduction mode in step #25. On the other hand, if it is determined in step #24 that the noise level of the compressor 10 is equal to or lower than the noise level inside the air-conditioned room (No), control is performed in the power generation mode in step #26. That is, in the power generation mode, power is generated by the piezoelectric element 11 that is subjected to the vibration of the compressor 10.

[0034] On the other hand, in step #21, if the vehicle speed is equal to or lower than a predetermined speed (e.g., 0 or 1 km / h), it is determined that the vehicle is stopped, and the process proceeds to step #27. In step #27, it is determined whether the compressor 10 is operating. If it is determined in step #27 that the compressor 10 is operating (Yes), it is determined in step #28 whether silent mode is being executed. If it is determined that silent mode is not being executed (step #28: No), the rotation speed of the compressor 10 is compared with a second set value in step #29. In this embodiment, the second set value is also a value smaller than the first set value (e.g., 8000 rpm), and is, for example, 3000 rpm. If it is determined in step #29 that the rotation speed of the compressor 10 exceeds the second set value, control of the vibration reduction mode is performed in step #31.

[0035] If operation of the compressor 10 is not confirmed in step #27 (No), power generation mode control is performed in step #32. If it is determined in step #29 that the rotation speed of the compressor 10 is equal to or lower than the second set value (No), the noise level of the compressor 10 is compared with the noise level inside the air-conditioned room in step #30. If it is determined in step #30 that the noise level of the compressor 10 exceeds the noise level inside the air-conditioned room (Yes), vibration reduction mode control is performed in step #31. On the other hand, if it is determined in step #30 that the noise level of the compressor 10 is equal to or lower than the noise level inside the air-conditioned room (No), power generation mode control is performed in step #32.

[0036] If execution of the silent mode is confirmed in step #28 (Yes), the mode is switched from the power generation mode to the vibration reduction mode in step #31 regardless of the operating state of the compressor 10. That is, in this embodiment as well, the control unit 20 is configured to be able to manually switch from the power generation mode to the vibration reduction mode. By manually switching from the power generation mode to the vibration reduction mode, the vibration of the compressor 10 is suppressed by the piezoelectric element 11.

[0037] [Another embodiment] The present invention may be configured as follows in addition to the above-described embodiments (common numbers and symbols are used to designate components having the same functions as those in the embodiments).

[0038] (a) In the above embodiment, an example was shown in which the control system 1 was provided with the running state acquisition unit 14 that acquires the running state of the vehicle, but the control system 1 may be configured without the running state acquisition unit 14. If the control system 1 does not have the running state acquisition unit 14, the control system 1 may be configured so that the control unit 20 determines the running state of the vehicle. Furthermore, the control system 1 may be configured so that the control unit 20 can switch between the power generation mode and the vibration reduction mode based only on the operation information of the compressor 10 acquired by the operation information acquisition unit 12, or based on the operation information and external information acquired by the external information acquisition unit 15.

[0039] (b) In the above embodiment, an example was shown in which the silent mode was provided, but the control system 1 may be configured without the silent mode.

[0040] (c) In the second and third embodiments, the information of the external device acquired by the external information acquisition unit 15 is exemplified by a noise value based on the air volume sent out from an air conditioning device mounted on a vehicle, but the information may also be a noise value related to another device.

[0041] (d) In the above embodiment, an example was shown in which the rotation speed of the compressor 10 and the noise level of the compressor 10 were used as the operation information of the compressor 10, but the operation information of the compressor 10 may be any operation information that affects the vibration state of the compressor 10.

[0042] In the above-described embodiment, the following configurations are envisioned. <1> The vehicle control system (1) is a vehicle control system (1) equipped with a compressor (10) and a piezoelectric element (11) mounted on the vehicle, and includes an operation information acquisition unit (12) that acquires operation information of the compressor (11), and a control unit (20) that controls the operation of the piezoelectric element (11). The control unit (20) is configured to be able to switch between a power generation mode in which the piezoelectric element (11) generates power through vibration of the compressor (10) and a vibration reduction mode in which power is supplied to the piezoelectric element (11) to reduce vibration caused by the compressor (10), based on the operation information of the compressor (10).

[0043] In this embodiment, switching between vibration reduction of the compressor (10) and power generation by the piezoelectric element (11) using the vibration of the compressor (10) can be performed depending on the manner in which the vehicle is used. The piezoelectric element (11) is attached, for example, to a joint between the compressor (10) and the vehicle body or to a housing of the compressor (10). For example, when noise other than that of the compressor (10) (e.g., road noise) is generated while the vehicle is moving and the vibration of the compressor (10) has little impact on passengers, a power generation mode that allows the vibration of the compressor (10) and uses the vibration to generate power is useful. On the other hand, when the interior of the vehicle is quiet, for example, while the vehicle is stopped or while power is being supplied to the vehicle, and the vibration of the compressor (10) is likely to cause noise, a vibration reduction mode that applies power to the piezoelectric element (11) to reduce the vibration of the compressor (11) is useful.

[0044] <2> <1> In the control system (1) for the vehicle, the rotation speed of the compressor (10) is set as the operation information of the compressor (10), and the control unit (20) preferably performs control to switch to the vibration reduction mode when the rotation speed of the compressor (10) becomes greater than a first set value while the vehicle is running, and performs control to switch to the vibration reduction mode when the rotation speed of the compressor (10) becomes greater than a second set value that is smaller than the first set value while the vehicle is stopped.

[0045] In this embodiment, the power generation mode and the vibration reduction mode can be appropriately selected according to the rotation speed of the compressor (10), which is the operation information of the compressor (10). Furthermore, since the vibration of the compressor (10) is more easily felt when the vehicle is stopped than when the vehicle is moving, control is performed to switch to the vibration reduction mode using a second set value that is smaller than the first set value as a threshold value. This allows the power generation mode and the vibration reduction mode to be appropriately selected when the vehicle is moving and when it is stopped. As a result, the vehicle control system (1) can effectively switch between the power generation mode and the vibration reduction mode.

[0046] <3> <1> In the control system (1) for the vehicle, a noise value of the compressor (10) is set as the operation information of the compressor (10), and the control unit (20) preferably performs control to switch to the vibration reduction mode when a noise value based on the operation of the compressor (10) is greater than a noise value based on the volume of air sent out from an air conditioner mounted on the vehicle.

[0047] In this embodiment, the power generation mode and the vibration reduction mode can be appropriately selected according to the noise level of the compressor (10) and the noise level of the air conditioner, which are operational information of the compressor (10). When the noise level of the compressor (10) is greater than the noise level of the air conditioner, control is performed to switch to the vibration reduction mode, thereby reducing the vibration of the compressor (10), which is the main cause of the noise of the compressor (10), and reducing noise inside the vehicle cabin. As a result, the vehicle control system (1) can effectively switch between the power generation mode and the vibration reduction mode.

[0048] <4> <1> The vehicle control system (1) preferably further comprises a running state acquisition unit (14) that acquires the running state of the vehicle, and the control unit (20) is configured to be able to switch between a power generation mode and a vibration reduction mode based on operation information of the compressor (10) and the running state of the vehicle.

[0049] In this embodiment, the power generation mode and the vibration reduction mode can be appropriately switched depending on the operation information of the compressor (10) and the running state of the vehicle. [Industrial Applicability]

[0050] The present invention can be widely applied to control systems for vehicles equipped with compressors. [Explanation of symbols]

[0051] 1: control system, 10: compressor, 11: piezoelectric element, 12: operation information acquisition unit, 14: running state acquisition unit, 20: control unit

Claims

1. A control system for a vehicle equipped with a compressor and a piezoelectric element mounted on the vehicle, an operation information acquisition unit that acquires operation information of the compressor; a control unit for controlling the operation of the piezoelectric element, The control unit is configured to be able to switch between a power generation mode in which the piezoelectric element generates electricity through vibration of the compressor and a vibration reduction mode in which power is supplied to the piezoelectric element to reduce vibration caused by the compressor, based on the operation information of the compressor.

2. The operation information of the compressor includes a rotation speed of the compressor, 2. The vehicle control system according to claim 1, wherein the control unit performs control to switch to the vibration reduction mode when the rotation speed of the compressor becomes greater than a first set value while the vehicle is traveling, and performs control to switch to the vibration reduction mode when the rotation speed of the compressor becomes greater than a second set value that is smaller than the first set value while the vehicle is stopped.

3. a noise value of the compressor is set as the operation information of the compressor, 2. The vehicle control system according to claim 1, wherein the control unit performs control to switch to the vibration reduction mode when a noise level based on the operation of the compressor is greater than a noise level based on the air volume delivered from an air conditioning device mounted on the vehicle.

4. a running state acquisition unit for acquiring a running state of the vehicle; The vehicle control system according to claim 1 , wherein the control unit is configured to be able to switch between the power generation mode and the vibration reduction mode based on the operation information of the compressor and the running state of the vehicle.

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