New energy automobile high-pressure air pump control system and method

Abstract

The invention discloses a new energy automobile high-pressure air pump control system and method. The new energy automobile high-pressure air pump control system comprises an air compressor, a DCAC module, a vehicle control unit VCU and a dryer ECU. Wherein the air compressor is connected to the air reservoir through an air path; the dryer ECU sends a trigger signal to the VCU through hardware when requesting to inflate, and the output end of the VCU is connected to the DCAC module and used for outputting an enable signal for controlling the DCAC to work or not; the output end of the DCAC module is used for being connected to an air compressor through power supply hardware. The failure risk is monitored and analyzed as much as possible while inflation control of the high-pressure air pump system is completed, the failure problem is solved as much as possible through control, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage component control of new energy vehicles, and in particular to a high-voltage air pump control system and method for new energy vehicles. Background Art

[0002] With the development of new energy electric vehicles, electrification has developed and become popular from passenger cars to commercial vehicles. In commercial vehicles, vacuum pump systems are often used to provide brake assistance, such as an electric vacuum pump for automobile brake systems with patent application number 201511011574.X, which includes a motor, a pump body assembly, a one-way valve assembly, a cam, and a connecting rod assembly in the lower shell and the upper shell. A single blade rotates at high speed in an annular cavity, and cooperates with the cam, the air baffle, and the one-way valve to form a vacuum cavity. The vacuum pump provided by the patent has a gap fit between the blade and the baffle rotor, the blade and the upper cover plate, and the inner wall of the annular cavity formed by the lower cover plate, which will not generate friction or heat, can operate for a long time, improve reliability, reduce noise, and carry out vacuuming and exhausting at the same time. The vacuuming rate is fast, which reduces gas leakage and improves the ultimate vacuum degree that the vacuum pump can reach.

[0003] Although there are many advantages to using a vacuum pump for brake assist, high-pressure air pumps are still widely used in commercial vehicles due to various factors such as cost and development. Compared with vacuum pump systems, high-pressure air pumps provide additional braking force in structure while providing brake assist. When the air pressure is insufficient, the vehicle has braking force by default, which will cause the vehicle to be unable to drive normally. Insufficient air pressure is generally due to failure problems. Therefore, the control of the high-pressure air pump system needs to consider system failure problems in order to improve user experience and ensure the pressure of the high-pressure air pump system as much as possible. However, existing technologies cannot effectively monitor and handle failure conditions. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a new energy vehicle high-pressure air pump control system and method, which can monitor and analyze the failure risks as much as possible while completing the inflation control of the high-pressure air pump system and solve the failure problems as much as possible through control, thereby improving the user experience.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a new energy vehicle high-pressure air pump control system, including an air compressor, a DCAC module, a vehicle controller VCU, and a dryer ECU; wherein the air compressor is connected to the air tank through an air circuit; when the dryer ECU requests to inflate, it sends a trigger signal to the vehicle controller VCU through hardware, and the output end of the vehicle controller VCU is connected to the DCAC module for outputting an enable signal for controlling whether the DCAC works or not; the output end of the DCAC module is used to be connected to the air compressor through power supply hardware.

[0006] The input end of the dryer ECU is connected to an air pressure sensor, which is arranged in the air circuit to collect the air pressure signal in the air circuit. The dryer ECU automatically outputs an inflation request signal to the vehicle controller VCU through the collected air pressure signal.

[0007] The instrument I CM obtains the pressure signal in the air tank through the sensor, and the instrument sends the air tank status data to the vehicle controller VCU through the CAN network.

[0008] The vehicle controller VCU is connected to the brake signal acquisition module, and is used to obtain the brake signal of the vehicle, judge the fault state based on the brake signal data and / or the pressure data in the air storage tank, and execute the fault protection strategy.

[0009] The vehicle controller VCU determines whether to enter the protection state by timing the request signal of the dryer ECU, and controls the system through the protection strategy after entering the protection state.

[0010] The control system also includes a high-pressure air pump failure detection module, which is used to detect the failure state of the high-pressure air pump. The output end of the high-pressure air pump failure detection module is connected to the vehicle controller VCU; the output end of the vehicle controller VCU is connected to the vehicle-mounted alarm to issue a high-pressure failure alarm.

[0011] The control system also includes a cooling fan for dissipating heat from the air compressor and the DCAC module, and the vehicle controller VCU outputs an enable signal to the cooling fan to control the rotation of the fan.

[0012] A control method for a high-pressure air pump control system of a new energy vehicle, comprising:

[0013] The vehicle controller VCU receives the request signal from the dryer ECU or the air cylinder status signal obtained through CAN to output the corresponding enable control signal to the DCAC module to control the DCAC module to enable operation. The DCAC module outputs power to the air compressor to control the operation of the air compressor, and the air cylinder is inflated by the operation of the air compressor. When the air compressor is powered on, the load current of the air compressor is calculated and sent to the CAN network, and the vehicle controller VCU receives and controls the working state of the DCAC module to control the working state of the air compressor.

[0014] When the vehicle controller VCU detects that the temperature of the DCAC module or the air compressor meets the cooling condition during operation, the vehicle controller VCU outputs a control signal to the cooling fan to implement heat dissipation control through the cooling fan.

[0015] The vehicle controller VCU determines whether the system is in a failure state by collecting signals from various components of the high-pressure air pump system, and outputs control instructions and / or alarm instructions that match the failure state.

[0016] The advantages of the present invention are: while completing the inflation control of the high-pressure air pump system, the failure risk is monitored and analyzed as much as possible, and the failure problem is solved as much as possible through control, thereby improving the user experience. User needs are met to the greatest extent at a relatively low cost; at the same time, failure analysis and processing are performed on the failure of components in the system to improve the vehicle experience. In this high-pressure air pump system, the vehicle controller controls the opening and closing of related components through the high-pressure inflation system request signal, and monitors and judges the status of the high-pressure inflation system through the existing vehicle-side status signal. When it is determined that a component may have a failure condition, the inflation system is automatically controlled to inflate, and the status of the entire vehicle is controlled and processed, reducing the safety risk of insufficient air pressure caused by failure, and improving driving experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0018] Figure 1 This is a principle block diagram of the control system of the present invention;

[0019] Figure 2 This is a schematic diagram of the signal interaction principle of the high-pressure air pump control system of the present invention. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0021] In the high-pressure air pump control system of this embodiment, other control functions can be completed by a single ECU of the vehicle controller under the basic configuration, so as to meet user needs to the greatest extent at a relatively low cost; at the same time, failure analysis and processing are performed for component failures in the system to improve the vehicle experience. In this high-pressure air pump system, the vehicle controller controls the opening and closing of related components through the high-pressure inflation system request signal, and monitors and judges the status of the high-pressure inflation system through the existing vehicle-side status signal. When it is determined that a component may have a failure condition, the inflation system is automatically controlled to inflate, and the status of the entire vehicle is controlled and processed.

[0022] like Figure 1 As shown in the figure, it is a control principle block diagram of the high-pressure air pump system. The principle block diagram defines the connection relationship between the vehicle-side VCU and each ECU, including the physical structure connection method and the network communication method. The high-pressure air pump system includes DCAC, cooling fan, air compressor, dryer ECU, air pressure sensor and air tank.

[0023] exist Figure 1 In the principle block diagram, when the dryer requests to be inflated, the VCU will provide an enable signal to the DCAC to control the operation of the DCAC. After the air compressor receives power from the DCAC, it enters the working state and passes the gas through the air path and the dryer to the air tank. The entire inflation process is completed. At the same time, the instrument gives the air pressure information in the air tank to the VCU for inflation system status detection. The vehicle controller will read the vehicle's braking-related data and the working information of each component in the system based on the CAN network to determine whether the current system is in a failure state and the specific type of failure state, and then issue an alarm and implement the corresponding safety control strategy based on the failure state to ensure that the high-pressure air pump system can work as much as possible in the event of a fault failure. The following is a detailed introduction to the working principle of the high-pressure air pump control system:

[0024] like Figure 1 , which is a schematic diagram of the hardware component structure and connection control signal of the high-pressure air pump control system of the new energy vehicle in this embodiment; the high-pressure air pump control system in this embodiment includes an air compressor, a DCAC module, a vehicle controller VCU, and a dryer ECU;

[0025] The air compressor is connected to the air storage cylinder through the air circuit; when the dryer ECU requests to inflate, it sends a trigger signal to the vehicle controller VCU through hardware. The output end of the vehicle controller VCU is connected to the DCAC module, which is used to output an enable signal to control whether the DCAC works or not; the output end of the DCAC module is used to connect to the air compressor through power supply hardware. The input end of the dryer ECU is connected to the air pressure sensor, which is set in the air circuit to collect the air pressure signal in the air circuit. The dryer ECU automatically outputs the request to inflate signal to the vehicle controller VCU through the collected air pressure signal.

[0026] When the dryer ECU detects insufficient air pressure through the air pressure sensor, the desiccant ECU can send a request signal to the vehicle controller VCU through the hard line, that is, give the signal to the VCU through the hard line with high validity, so as to actively send the request signal to the vehicle controller VCU. After receiving the request signal, the vehicle controller VCU sends a control signal to the DCAC module in the form of CAN communication by enabling the control signal to drive the DCAC module to work. The DCAC module is used to convert direct current into alternating current to provide power for the air compressor. The air compressor starts working after being powered on to achieve the purpose of pumping air into the air tank through the air path. The dryer is arranged in the air path loop to dry the gas in the air path. The dryer ECU reads the air path pressure through the air pressure sensor to detect whether the pressure is normal or not, and can send a corresponding signal to the vehicle controller VCU according to the detection.

[0027] The instrument I CM obtains the pressure signal in the air cylinder through the sensor. The instrument sends the air cylinder status data to the vehicle controller VCU through the CAN network, and can provide the vehicle controller VCU with the pressure parameters in the air cylinder, so that the vehicle controller VCU can actively start the inflation process according to the pressure parameters, that is, actively control the DCAC module to enable the work to control the air compressor to inflate the air cylinder.

[0028] In this embodiment, since the DCAC module and the air compressor will generate heat during operation, a cooling fan is provided to reduce the influence of heat on the module operation, wherein the cooling fan is used to dissipate heat from the air compressor and the DCAC module. The vehicle controller VCU outputs an enable signal to the cooling fan to control the rotation of the fan. The operation of the cooling fan can be started or not according to the control of the vehicle controller VCU.

[0029] When the high-pressure air pump system is in normal working state, the vehicle controller VCU determines whether to inflate according to the request for inflation signal received from the dryer ECU and / or the air cylinder pressure signal sent by the instrument through CAN collected by the vehicle controller VCU through the sensor. When it is determined that inflation is required, the vehicle controller outputs an enable control signal to the DCAC module according to the request for inflation signal sent by the dryer ECU or the demand for inflation due to low air pressure, and drives the DCAC module to start working and output the AC power required for the operation of the air compressor. The air compressor starts to work and inflate after power is supplied. After the inflation is turned on, the vehicle controller VCU determines whether to end the inflation according to the air cylinder pressure signal sent by the ICM or determines whether to end the inflation according to the disappearance of the request for inflation signal sent by the dryer ECU. When it is determined that the inflation is ended, the vehicle controller VCU stops outputting the enable signal to the DCAC module, the DCAC module stops working, and the air compressor stops working.

[0030] After the vehicle controller VCU drives the DCAC module to work, the DCAC module collects and calculates the air compressor load current signal through the circuit, and sends the air compressor load working current signal to the vehicle controller VCU through the CAN network. The vehicle controller VCU determines whether the working status of the air compressor is abnormal based on the air compressor load current and controls it accordingly.

[0031] When it is judged that the working state of the air compressor is normal, the vehicle controller VCU will continue to control the DCAC module to work until it is judged that the inflation can be finished, and then it will control the DCAC module to stop supplying power, and the air compressor will stop working. When the air compressor is judged to be in an abnormal working state based on the load current of the air compressor, the vehicle controller VCU sends an alarm signal through the vehicle alarm such as the vehicle instrument, and controls the DCAC module to stop working and restart the DCAC module after a delay. If the detected working load current of the air compressor is still in an abnormal state, the DCAC module will be controlled to stop working and report the fault to the instrument alarm.

[0032] In another preferred embodiment of the present embodiment, the vehicle controller VCU is connected to the brake signal acquisition module to obtain the brake signal of the vehicle, judge the fault state and execute the fault protection strategy based on the brake signal data and / or the pressure data in the air tank; wherein the vehicle controller detects that the user's brake signal is valid for multiple consecutive times within a startup cycle of the vehicle and the dryer ECU does not issue an inflation request or the pressure in the air tank detected by the instrument is less than the set threshold and the dryer ECU does not issue an inflation request, then it can be judged that there is an inflation demand, but the dryer ECU does not issue a signal to enable the inflation request, indicating that the dryer may be abnormal at this time. In order to reduce the abnormality of the high-pressure air pump system caused by the abnormality of the dryer ECU, the inflation process is actively started at this time, that is, the vehicle controller VCU actively sends an inflation enable control signal to the DCAC, and continuously controls the DCAC module to work for T1 s, so that the DCAC module provides working voltage for the air compressor to allow the air compressor to work for T1 s, thereby achieving inflation under abnormal fault conditions. After the inflation lasts for T1 s, the air tank pressure collected by the instrument is detected. If it is still lower than the set pressure threshold, the vehicle controller VCU determines that the inflation system has a fault and uploads the fault to the instrument and other on-board alarms for alarm.

[0033] If the enable signal of the dryer ECU is detected within T1 s during the inflation process controlled by the vehicle controller VCU, the timing ends and the vehicle controller returns to controlling the operation of the DCAC module according to the enable signal of the ECU.

[0034] Thermal protection and air leakage protection strategy: The vehicle controller VCU determines whether to enter the protection state by timing the request signal of the dryer ECU. After entering the protection state, the system is controlled by the protection strategy. When the vehicle controller VCU detects that the dryer ECU lasts for 300s, it determines that there is a risk of thermal protection or air leakage. At this time, there may be an air compressor failure or DCAC failure or air leakage. Therefore, after the vehicle controller VCU executes 300sTBD to enable DCAC, the vehicle controller VCU stops sending the DCAC enable control signal to set the time threshold. After stopping the setting time threshold, the vehicle controller VCU collects the enable request signal sent by the dryer ECU and continues to execute the control of the DCAC module according to the enable signal of the dryer ECU.

[0035] In this embodiment, a high-pressure air pump failure detection module is provided, which is used to detect the failure state of the high-pressure air pump. The output end of the high-pressure air pump failure detection module is connected to the vehicle controller VCU; the output end of the vehicle controller VCU is connected to the vehicle alarm to issue a high-pressure failure alarm. The vehicle controller VCU detects the fault state of the components of the high-pressure system according to the high-pressure air pump failure detection module, issues a fault alarm according to the fault state, and adopts a short-term repair strategy to realize the control of the high-pressure air pump system:

[0036] 1. The vehicle controller VCU collects the air pressure signals of the air cylinder and the air circuit through the air pressure sensor, and determines whether the air tank or the air circuit is currently leaking or failing based on the air pressure changes during inflation. If so, the fault is directly reported to the vehicle instrument and other instruments for alarm.

[0037] 2. After the vehicle controller VCU detects that the air compressor does not work after the DCAC is enabled, it is determined that the air compressor is physically damaged and cannot work. At this time, the fault is directly reported to the instrument for display; the air pressure sensor can be used to detect the air pressure change after the DCAC is enabled to determine whether the air compressor is working.

[0038] 3. After the dryer ECU reports an error or its self-test fails, the enable signal cannot be output to the vehicle controller VCU due to the dryer failure. At this time, the vehicle controller controls the intermittent operation of the DCAC according to the preset time threshold, such as letting the air compressor work for a certain period of time at each time. In this way, the air pressure consumption is predicted for automatic replenishment to avoid the defect that the vehicle cannot provide gas normally due to the dryer ECU failure. At this time, although the vehicle controller VCU can control the air compressor to work for a short time, there are still safety hazards. Therefore, it is also necessary to report the fault through the vehicle CAN network and issue an alarm reminder through the instrument I CM.

[0039] In a preferred solution of the present embodiment, a control method for a high-pressure air pump control system of a new energy vehicle is also provided, including: the vehicle controller VCU receives a request signal from the dryer ECU or an air tank status signal obtained through CAN to output a corresponding enable control signal to the DCAC module to control the DCAC module to enable operation, the DCAC module outputs power to the air compressor to control the operation of the air compressor, and the air tank is inflated by the operation of the air compressor; wherein when the air compressor is powered on, the load current of the air compressor is calculated and sent to the CAN network and received by the vehicle controller VCU to control the working state of the DCAC module to control the working state of the air compressor. When the vehicle controller VCU detects that the temperature of the DCAC module or the air compressor meets the cooling condition when it is working, the vehicle controller VCU outputs a control signal to the cooling fan to achieve heat dissipation control through the cooling fan. Since the DCAC module and the air compressor will generate heat during operation, a cooling fan is provided to reduce the impact of heat on the module operation. The cooling fan is used to dissipate heat from the air compressor and the DCAC module. The vehicle controller VCU outputs an enable signal to the cooling fan to control the rotation of the fan. The operation of the cooling fan can be started or not according to the control of the vehicle controller VCU. In order to save costs, this solution does not set a temperature sensor but controls the operation of the cooling fan according to the working time of the air compressor. When it is detected that the DCAC module has been working continuously for a set time threshold, the cooling fan is turned on. The set time threshold for continuous operation can be calibrated. If the threshold is exceeded, the accumulated heat will affect normal operation, so the operation of the cooling fan is controlled according to the accumulated time.

[0040] The vehicle controller VCU determines whether the system is in a failure state by collecting signals from various components of the high-pressure air pump system, and outputs control instructions and / or alarm instructions that match it based on the failure state. When it is determined that the working state of the air compressor is normal, the vehicle controller VCU continues to control the DCAC module to work until it is determined that the inflation can be stopped, and then it will control the DCAC module to stop supplying power, and the air compressor will stop working. When the air compressor is judged to be in an abnormal working state based on the load current of the air compressor, the vehicle controller VCU sends an alarm signal through the on-board alarm such as the on-board instrument, and at the same time controls the DCAC module to stop working and restart the DCAC module after a delay. If the detected load current of the air compressor is still in an abnormal state, the DCAC module is controlled to stop working and report the fault to the instrument alarm.

[0041] The vehicle controller VCU is connected to the brake signal acquisition module to obtain the vehicle's brake signal, judge the fault state and execute the fault protection strategy based on the brake signal data and / or the pressure data in the air tank; wherein the vehicle controller detects that the user's brake signal is valid for multiple consecutive times within a vehicle startup cycle and the dryer ECU does not issue an inflation request, or the pressure in the air tank detected by the instrument is less than the set threshold and the dryer ECU does not issue an inflation request, then it can be judged that there is an inflation demand, but the dryer ECU does not issue a signal to enable the inflation request, indicating that the dryer may be abnormal at this time. In order to reduce the abnormality of the high-pressure air pump system caused by the abnormality of the dryer ECU, the inflation process is actively started at this time, that is, the vehicle controller VCU actively sends an inflation enable control signal to the DCAC, and continuously controls the DCAC module to work for T1 s, so that the DCAC module provides working voltage for the air compressor to allow the air compressor to work for T1 s, thereby achieving inflation under abnormal fault conditions. After the inflation duration T1 s, the gas tank pressure collected by the instrument is detected and obtained. If it is still lower than the set pressure threshold, the vehicle controller VCU determines that the inflation system is faulty and uploads the fault to the instrument and other on-board alarms for alarm. If the enable signal of the dryer ECU is detected within T1 s during the inflation process controlled by the vehicle controller VCU, the timing ends. The vehicle controller is restored to control the operation of the DCAC module according to the enable signal of the ECU. The time T1 can be calibrated and set according to actual needs. Its parameter settings can be: when it is detected that the user's TBD brake signal is valid for 8 consecutive times; (it may be judged that the dryer & air pressure sensor fails) or the instrument sends a low gas tank pressure state (at this time, it is judged that there is a lack of air or the gas cylinder & gas path leaks), when any of them is met and it is detected that the dryer does not send a hard-line inflation enable, the VCU continues to send a DCAC enable signal T1 s, thereby realizing active inflation to meet the air pressure requirements as much as possible.

[0042] Thermal protection and air leakage protection strategy: The vehicle controller VCU determines whether to enter the protection state by timing the request signal of the dryer ECU. After entering the protection state, the system is controlled by the protection strategy. When the vehicle controller VCU detects that the dryer ECU lasts for 300s, it determines that there is a risk of thermal protection or air leakage. At this time, there may be an air compressor failure or DCAC failure or air leakage. Therefore, after the vehicle controller VCU executes the 300sTBD to enable DCAC, the vehicle controller VCU stops sending the DCAC enable control signal to set the time threshold. After stopping the setting time threshold, the vehicle controller VCU collects the enable request signal sent by the dryer ECU and continues to execute the control of the DCAC module according to the enable signal of the dryer ECU. When it is detected that the dryer request lasts for 300STBD (air compressor failure or DCAC failure or air leakage), the VCU stops sending DCAC enable for 30s and then resumes DCAC enable (involving safety and requires calibration).

[0043] The control system of the high-pressure air pump in this solution is applied to commercial vehicles, and solves the state monitoring and analysis of the braking system of the whole vehicle for light trucks, large VANs, heavy trucks and other commercial vehicles with large vehicle load mass, and provides sufficient and reliable braking force. At the same time, the braking system is graded to ensure the customer's car experience to the greatest extent. The high-pressure air pump control system in the present invention can be completed by a single ECU of the whole vehicle controller under the basic configuration, and other control functions can be completed to the greatest extent at a relatively low cost. User needs can be met at the greatest extent; at the same time, failure analysis and processing are performed for component failures in the system to improve the car experience. The whole vehicle controller controls the opening and closing of related components through the high-pressure inflation system request signal, and monitors and judges the status of the high-pressure inflation system through the existing status signal. When it is determined that the component may have a failure condition, the inflation system is automatically controlled to inflate, and the status of the whole vehicle is controlled and processed.

[0044] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A high-pressure air pump control system for new energy vehicles, characterized in that: It includes an air compressor, a DCAC module, a vehicle controller VCU, and a dryer ECU; the air compressor is connected to the air tank through an air circuit; when the dryer ECU requests to inflate, it sends a trigger signal to the vehicle controller VCU through hardware, and the output end of the vehicle controller VCU is connected to the DCAC module to output an enable signal for controlling whether the DCAC works or not; the output end of the DCAC module is used to be connected to the air compressor through power supply hardware.

2. A new energy vehicle high pressure air pump control system as described in claim 1, characterized in that: The input end of the dryer ECU is connected to an air pressure sensor, which is arranged in the air circuit to collect the air pressure signal in the air circuit. The dryer ECU automatically outputs an inflation request signal to the vehicle controller VCU through the collected air pressure signal.

3. A new energy vehicle high pressure air pump control system as claimed in claim 1 or 2, characterized in that: The instrument ICM obtains the pressure signal in the air tank through the sensor, and the instrument sends the air tank status data to the vehicle controller VCU through the CAN network.

4. A new energy vehicle high pressure air pump control system as claimed in claim 3, characterized in that: The vehicle controller VCU is connected to the brake signal acquisition module, and is used to obtain the brake signal of the vehicle, judge the fault state based on the brake signal data and / or the pressure data in the air storage tank, and execute the fault protection strategy.

5. A new energy vehicle high pressure air pump control system as described in any one of claims 1 to 4, characterized in that: The vehicle controller VCU determines whether to enter the protection state by timing the request signal of the dryer ECU, and controls the system through the protection strategy after entering the protection state.

6. A new energy vehicle high pressure air pump control system as claimed in any one of claims 1 to 4, characterized in that: The control system also includes a high-pressure air pump failure detection module, which is used to detect the failure state of the high-pressure air pump. The output end of the high-pressure air pump failure detection module is connected to the vehicle controller VCU; the output end of the vehicle controller VCU is connected to the vehicle-mounted alarm to issue a high-pressure failure alarm.

7. A new energy vehicle high pressure air pump control system as claimed in claim 6, characterized in that: The control system also includes a cooling fan for dissipating heat from the air compressor and the DCAC module, and the vehicle controller VCU outputs an enable signal to the cooling fan to control the rotation of the fan.

8. A control method for a high-pressure air pump control system for a new energy vehicle according to any one of claims 1 to 7, characterized in that: include: The vehicle controller VCU receives the request signal from the dryer ECU or the air cylinder status signal obtained through CAN to output the corresponding enable control signal to the DCAC module to control the DCAC module to enable operation. The DCAC module outputs power to the air compressor to control the operation of the air compressor, and the air cylinder is inflated by the operation of the air compressor. When the air compressor is powered on, the load current of the air compressor is calculated and sent to the CAN network, and the vehicle controller VCU receives and controls the working state of the DCAC module to control the working state of the air compressor.

9. A control method for a high-pressure air pump control system for a new energy vehicle as claimed in claim 8, characterized in that: When the vehicle controller VCU detects that the temperature of the DCAC module or the air compressor meets the cooling condition during operation, the vehicle controller VCU outputs a control signal to the cooling fan to implement heat dissipation control through the cooling fan.

10. The control method of a high-pressure air pump control system for a new energy vehicle according to claim 8, characterized in that: The vehicle controller VCU determines whether the system is in a failure state by collecting signals from various components of the high-pressure air pump system, and outputs control instructions and / or alarm instructions that match the failure state.

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