Air compressor control system, air compressor control method and computer-readable storage medium

Abstract

The present invention discloses an air compressor control system, an air compressor control method, a vehicle and a readable storage medium. The air compressor control system includes: a control device, a braking device, an air storage tank device, a dryer with an unloading valve assembly device, an air compressor and a pressure detection component, which are respectively connected to the control device; wherein, at least two braking pipelines are communicated between the braking device and the air storage tank device, the air storage tank device, the dryer with an unloading valve assembly device and the air compressor are sequentially communicated through connecting pipelines, and the pressure detection component is installed on the braking pipeline. The control device obtains and controls the enabling of the air compressor according to the usage state of the braking device, the state of the air storage tank pressure switch in the air storage tank device, the state of the unloading valve pressure switch in the dryer with an unloading valve assembly device, and the pressure value of the pressure component. The present invention improves the accuracy of the enabling judgment of the air compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, and particularly to an air compressor control system, an air compressor control method, and a computer-readable storage medium. Background Art

[0002] Pneumatic braking is commonly used in traditional light commercial vehicles with a load capacity of more than 4.5T. Its characteristics of simplicity, reliability, and excellent braking performance make it the mainstream braking type for large-load commercial vehicles. The pneumatic braking system applied to traditional commercial vehicles uses an air compressor driven by an engine to supply energy to the braking system, stores high-pressure gas in an air storage tank, and controls the valves in the braking system to perform braking when needed.

[0003] During the process of new energy transformation of commercial vehicles, due to the cancellation of the engine, the power source of the air compressor is changed from the engine to electric drive; in order to reduce the energy consumption loss of the air compressor, the working mode of the air compressor is changed from a constant drive mode to a demand-driven mode.

[0004] In the existing start-stop control of electric air compressors, the commonly used control strategy is a switch control strategy, that is, when the system detects that the pressure in the air storage tank is lower than the threshold, a relevant start signal is sent through a pneumatic switch arranged on the tank, and the system controls the electric air compressor to start working. When the air pressure of the system reaches the unloading pressure of the unloading valve, a switch installed at the exhaust hole of the unloading valve sends an unloading state to the control system, and then the system controls the electric air compressor to end the energy replenishment work. At the same time, for the safe operation of the whole vehicle, when the pressure in the air storage tank is lower than the threshold, the whole vehicle is prohibited from starting and reports a low air pressure fault. When a relevant low air pressure fault occurs during driving, the whole vehicle is speed-limited and power-limited to ensure the safe operation of the whole vehicle. However, in actual use, since the switch has only two states and the existing system structure is simple, it can only rely on the reliability of the switch and the connection, there are many situations that cannot be judged, which easily leads to inaccurate enabling judgment of the air compressor, and then causes safety risks for the whole vehicle. Summary of the Invention

[0005] The main purpose of the present invention is to provide an air compressor control system, an air compressor control method, and a computer-readable storage medium. The aim is to solve the problem of inaccurate enabling judgment of the air compressor.

[0006] To achieve the above object, the present invention provides an air compressor control system, and the air compressor control system includes:

[0007] A control device, a braking device, an air storage tank device, a dryer with an unloading valve assembly device, an air compressor, and a pressure detection component, which are respectively connected to the control device;

[0008] Among them, the braking device and the air storage tank device are connected through at least two braking pipelines. The air storage tank device, the dryer with unloading valve assembly device, and the air compressor are sequentially connected through connecting pipelines, and the air pressure detection component is installed on the braking pipeline;

[0009] The control device obtains and controls the enabling of the air compressor according to the usage state of the braking device, the air storage tank air pressure switch state in the air storage tank device, the unloading valve air pressure switch state in the dryer with unloading valve assembly device, and the pressure value of the air pressure component.

[0010] Optionally, the air pressure detection component includes an instrument and at least two loop air pressure sensors connected to the instrument. The instrument is connected to the control device, and at least two of the loop air pressure sensors are arranged in one-to-one correspondence with at least two of the braking pipelines. Among them, the air pressure detection component is used to detect the pressure value of the braking pipeline..

[0011] Optionally, the dryer with unloading valve assembly device includes a dryer with unloading valve assembly and an unloading valve air pressure switch. The unloading valve air pressure switch is arranged on the dryer with unloading valve assembly and is connected to the control device. Among them, the unloading valve air pressure switch is used to provide the unloading valve air pressure switch state for the control device.

[0012] Optionally, the braking device includes a foot valve and a brake pedal and a brake pedal switch arranged on the foot valve. The brake pedal switch is connected to the control device. Among them, the braking device is used to provide the usage state for the control device.

[0013] In addition, to achieve the above object, the present invention also provides an air compressor control method. The air compressor control method is applied to the above air compressor control system. The air compressor control method includes the steps:

[0014] When detecting an enabling request sent by the control device, obtain the air storage tank air pressure switch state of the air storage tank device and the first pressure data of the air pressure detection component, and determine whether the vehicle needs to be refueled;

[0015] If the vehicle needs to be refueled, obtain the usage state of the braking device, control the air compressor to be enabled within a preset enabling time, and obtain an enabling result;

[0016] Obtain the second pressure data of the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading valve assembly device according to the enabling result, and control the operation of the air compressor.

[0017] Optionally, the first pressure data includes the first pressure values of two loop air pressure sensors;

[0018] The steps of obtaining the air storage tank pressure switch state of the air storage tank device and the first pressure data of the pressure detection component, and determining whether the vehicle needs to be refueled include:

[0019] Obtain the air storage tank pressure switch state of the air storage tank device and the first pressure values of two circuit pressure sensors;

[0020] Compare the air storage tank pressure switch state and the first pressure value with preset refueling conditions to determine the refueling requirement of the vehicle.

[0021] Optionally, after the step of comparing the air storage tank pressure switch state and the first pressure value with preset refueling conditions to determine the refueling requirement of the vehicle, the following steps are further included:

[0022] If the refueling requirement is to refuel, determine whether the first pressure value meets the preset low air pressure alarm condition;

[0023] If it meets the low air pressure alarm condition, generate a vehicle braking alarm fault, and execute the step: if the vehicle needs to be refueled, obtain the usage state of the braking device, control the air compressor to be enabled within a preset enabling time, and obtain the enabling result.

[0024] Optionally, the air compressor control method further includes:

[0025] If the enabling result is enabling timeout and the vehicle has a braking alarm fault, speed limit and limit the power of the vehicle, and obtain the second pressure data of the pressure detection component, the unloading valve pressure switch state of the dryer with unloading valve assembly device and the air storage tank pressure switch state, and determine the fault type of the air compressor.

[0026] Optionally, the second pressure data includes the second pressure values of two circuit sensors;

[0027] The steps of obtaining the second pressure data of the pressure detection component and the unloading valve pressure switch state of the dryer with unloading valve assembly device according to the enabling result, and controlling the air compressor to work include:

[0028] If the enabling result is normal enabling, obtain the second pressure values of two circuit sensors in the pressure detection component and the unloading valve pressure switch state of the dryer with unloading valve assembly device;

[0029] When the second pressure value and the unloading valve pressure switch state reach the preset stop enabling condition, stop the enabling of the air compressor;

[0030] When the second pressure value and the unloading valve air pressure switch state do not reach the preset stop enabling condition, it is determined that the vehicle needs to be refueled, and the following steps are executed: If the vehicle needs to be refueled, obtain the usage status of the braking device, and control the air compressor to be enabled within the preset enabling time to obtain an enabling result.

[0031] In addition, to achieve the above object, the present invention also provides a vehicle, which includes: a memory, a processor, and an air compressor control program stored on the memory and executable on the processor. When the air compressor control program is executed by the processor, the steps of the air compressor control method as described above are implemented.

[0032] In addition, to achieve the above object, the present invention also provides a computer-readable storage medium, on which an air compressor control program is stored. When the air compressor control program is executed by a processor, the steps of the air compressor control method as described above are implemented.

[0033] The present invention provides an air compressor control system, an air compressor control method, a vehicle, and a readable storage medium. In the air compressor control system, through a control device, it is possible to control the braking device, the air storage tank device, the dryer with unloading assembly device, the air compressor, and the air pressure detection component to work respectively. At the same time, a fusion control strategy for the vehicle's air compressor is implemented according to the status information of each device. By adding air pressure detection components to two braking circuits and introducing signal elements such as the braking device into the system control, multi-dimensional control elements and strategies are re-established to improve the rigor and safety of control, ensuring that when a single-point failure occurs in the air storage tank device, the dryer with unloading valve assembly device, and the two air pressure detection components, the risk of failure to enable the electric air compressor in a timely manner and issue a vehicle-wide alarm, which may lead to potential safety hazards, is avoided. By introducing the braking device, obtaining the usage status of the braking device, controlling the air compressor to be enabled within the preset enabling time to obtain an enabling result, the enabling timeout failure of the system can be identified faster, leaving more time for the vehicle to quickly enter a safe state and handle faults. By obtaining the second pressure data of the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading valve assembly device according to the enabling result, controlling the air compressor to work. By obtaining the air storage tank air pressure switch state of the air storage tank device and the first pressure data of the air pressure detection component when detecting an enabling request sent by the control device, determining whether the vehicle needs to be refueled, avoiding inaccurate judgment of air compressor enabling, and thus preventing potential vehicle-wide safety risk problems. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of the device in the hardware operating environment involved in the embodiment of the present invention;

[0035] Figure 2It is a schematic structural diagram of the air compressor control system of the present invention;

[0036] Figure 3 It is a schematic flowchart of an embodiment in the air compressor control method of the present invention;

[0037] Figure 4 It is a refined schematic flowchart of step S10 in an embodiment of the air compressor control method of the present invention;

[0038] Figure 5 It is a schematic flowchart of a second embodiment in the air compressor control method of the present invention;

[0039] Figure 6 The overall flowchart of the air compressor control method of the present invention when the vehicle starts;

[0040] Figure 7 It is a schematic structural diagram of the existing air compressor control system;

[0041] Figure 8 It is a flowchart of the existing air compressor control method.

[0042] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific Embodiments

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] As Figure 1 shown, Figure 1 It is a schematic structural diagram of the terminal of the hardware operating environment involved in the embodiment solution of the present invention.

[0045] The terminal in the embodiment of the present invention is a vehicle.

[0046] As Figure 1As shown in the figure, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a DVI interface 1004, a USB interface 1005, and a memory 1006. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The DVI interface 1004 may optionally include a standard wired interface and is connected to other external devices through a DVI cable. The USB interface 1005 may optionally include a standard wired interface and is connected to other external devices through a USB connection cable. The memory 1006 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1006 may also be a storage device independent of the aforementioned processor 1001.

[0047] Optionally, the terminal may further include an audio circuit and so on, which will not be elaborated here.

[0048] Those skilled in the art can understand that Figure 1 the terminal structure shown in

[0049] does not constitute a limitation on the terminal and may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. Figure 1 As shown in

[0050] the memory 1006, as a computer storage medium, may include an operating system, a DVI interface module, a USB interface module, a user interface module, and an air compressor control program. Figure 1 In the terminal shown in

[0051] when an enable request sent by the control device is detected, obtain the air storage tank pressure switch state of the air storage tank device and the first pressure data of the pressure detection component, and determine whether the vehicle needs to be refueled;

[0052] if the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within a preset enable time, and obtain an enable result;

[0053] Obtain the second pressure data of the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading valve assembly device according to the enabling result, and control the operation of the air compressor.

[0054] Further, the processor 1001 may call the air compressor control program stored in the memory 1006 and further perform the following operations:

[0055] Obtain the air storage tank air pressure switch state of the air storage tank device and the first pressure values of the two-loop air pressure sensors;

[0056] Compare the air storage tank air pressure switch state and the first pressure value with the preset energy replenishment condition to determine the energy replenishment requirement of the vehicle.

[0057] Further, the processor 1001 may call the air compressor control program stored in the memory 1006 and further perform the following operations:

[0058] If the energy replenishment requirement is to replenish energy, determine whether the first pressure value meets the preset low air pressure alarm condition;

[0059] If it meets the low air pressure alarm condition, generate a vehicle braking alarm fault, and execute the step: if the vehicle needs to replenish energy, obtain the usage state of the braking device, control the air compressor to be enabled within a preset enabling time, and obtain the enabling result.

[0060] Further, the processor 1001 may call the air compressor control program stored in the memory 1006 and further perform the following operations:

[0061] If the enabling result is enabling timeout and the vehicle has a braking alarm fault, limit the speed and power of the vehicle, and obtain the second pressure data of the air pressure detection component, the unloading valve air pressure switch state of the dryer with unloading valve assembly device, and the air storage tank air pressure switch state to determine the fault type of the air compressor.

[0062] Further, the processor 1001 may call the air compressor control program stored in the memory 1006 and further perform the following operations:

[0063] If the enabling result is normal enabling, obtain the second pressure values of the two-loop sensors in the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading valve assembly device;

[0064] When the second pressure value and the unloading valve air pressure switch state reach the preset stop enabling condition, stop the enabling of the air compressor;

[0065] When the second pressure value and the state of the unloading valve air pressure switch do not reach the preset stop enabling condition, it is determined that the vehicle needs to be refueled, and the following steps are executed: If the vehicle needs to be refueled, obtain the usage status of the braking device, and control the air compressor to be enabled within a preset enabling time to obtain an enabling result.

[0066] This application proposes an air compressor control system. In an embodiment of the air compressor control system, refer to Figure 2 , Figure 2 which is a schematic structural diagram of the air compressor control system.

[0067] The air compressor 2 control system includes a control device 8, a braking device 7, an air storage cylinder device 5, a dryer with unloading valve assembly device 4, an air compressor 2, and a pressure detection component 6, which are respectively connected to the control device 8; wherein, at least two braking pipelines are connected between the braking device 7 and the air storage cylinder device 5, the air storage cylinder device 5, the dryer with unloading valve assembly device 4, and the air compressor 2 are sequentially connected through connecting pipelines, and the pressure detection component 6 is installed on the braking pipeline.

[0068] In this embodiment, the control device is used to obtain and control the enabling of the air compressor according to the usage status of the braking device, the air storage cylinder pressure switch status in the air storage cylinder device, the unloading valve air pressure switch status in the dryer with unloading valve assembly device, and the pressure value of the pressure component. The control device 8 further includes a vehicle controller 8a (VCU) and a high-voltage auxiliary drive controller (BDCAC), and the vehicle controller 8a and the high-voltage auxiliary controller 8b are connected through a CAN line (Controller Area Network); wherein, the vehicle controller 8a is respectively connected to the pressure detection component 6 through a CAN line and a hard wire, and is used to receive the pressure data detected by the pressure detection component 6; the vehicle controller 8a is respectively connected to the air storage cylinder device 5, the dryer with unloading valve assembly device 4, and the braking device 7 through hard wires, and is used to receive the data sent by the above-mentioned respective devices and control the above-mentioned respective devices to work; the high-voltage auxiliary controller 8b is connected to the air compressor 2 through a hard wire, and is used to control the air compressor 2 to enter the enabling program according to the enabling request sent by the vehicle controller 8a, that is, to control the air compressor 2 to perform a refueling operation. In addition, the air compressor 2 control system further includes an intake air filter 1 connected to the air compressor 2 through a pipeline, which is used to filter the air entering the air compressor 2. The air compressor 2 control system further includes a check valve 3 arranged on the connecting pipeline between the dryer with unloading valve assembly device 4 and the air compressor 2, which is used to control the gas in the air compressor 2 to flow unidirectionally into the air storage cylinder device 5 connected to the dryer with unloading valve assembly device 4.

[0069] Further, the air pressure detection assembly 6 includes an instrument 6b and at least two loop air pressure sensors 6a connected to the instrument 6b. The instrument 6b is connected to the control device 8, and the at least two loop air pressure sensors 6a are arranged in one-to-one correspondence with at least two of the brake pipelines. Among them, the instrument 6b is the instrument panel. The instrument 6b is connected to the two loop air pressure sensors 6a by hard wires and is used to receive and display the real-time air pressure signals of the two brake pipelines measured by the two loop air pressure sensors 6a respectively. After the two air pressure loop sensors filter the real-time air pressure signals, they are sent to the vehicle controller 8a through the CAN line, so that the vehicle controller 8a controls the air compressor 2 to work according to the real-time air pressure signals.

[0070] Further, the dryer with unloading valve assembly device 4 includes a dryer with unloading valve assembly 4b and an unloading valve air pressure switch 4a. The unloading valve air pressure switch 4a is arranged on the dryer with unloading valve assembly 4b and is connected to the control device 8. Among them, the unloading valve air pressure switch 4a is connected to the vehicle controller 8a in the control device 8 by hard wires and is used to control the dryer with unloading valve assembly 4b to unload. Since the unloading of the unloading valve is an instantaneous state, the unloading valve air pressure switch 4a is at a high level of 1 when not unloading, and the rest are at a low level of 0. And the vehicle controller 8a monitors the level state of the unloading valve air pressure switch 4a in real time through hard wires.

[0071] Further, the braking device 7 includes a foot valve 7c, a brake pedal 7b and a brake pedal switch 7a arranged on the foot valve 7c. The brake pedal switch 7a is connected to the control device 8.

[0072] In addition, further, the air storage tank device 5 includes an air storage tank 5b and an air storage tank air pressure switch 5a arranged on the air storage tank 5b. The air storage tank air pressure switch 5a is connected to the control device 8.

[0073] In this embodiment, the foot valve is communicated with the air storage tank through a brake pipeline, and the brake pedal and the brake pedal switch are arranged on the foot valve. The brake pedal switch is also connected to the vehicle controller in the control device through a hard wire. The usage states of the brake pedal include two types: used and unused. The usage state of the brake pedal can be detected through the signal of the brake pedal switch. It should be noted that when the brake pedal is used, the air pressure in the air storage tank will decrease, that is, the loop air pressure sensor arranged on the brake pipeline will detect a decrease in the pressure value in the brake pipeline. The air storage tank pressure switch in the air storage tank device is at a high level of 1 when the air pressure in the air storage tank is lower than 650 kPa, and at a low level of 0 in other states. Therefore, through the level state of the air storage tank pressure switch and the values of the two loop air pressure sensors, when the pressure in the air storage tank cannot reach 650 kPa, the specific fault points between the two can be mutually verified according to the states and values between them. For details, please refer to the description in the second embodiment of the air compressor control method below.

[0074] The present invention provides an air compressor control system. In the air compressor control system, through the control device, it is possible to control the brake device, the air storage tank device, the dryer with unloading assembly device, the air compressor, and the air pressure detection component to work respectively. At the same time, a fusion control strategy for the air compressor of the vehicle is also realized according to the state information of each device; by adding air pressure detection components to the two brake circuits, and introducing signal elements such as the brake device into the system control, multi-dimensional control elements and strategies are re-established, improving the rigor and safety of control, and ensuring that when a single-point fault occurs in the air storage tank device, the dryer unloading valve assembly device, and the two air pressure detection components, the risk of failure to enable the electric air compressor in time and issue a vehicle-wide alarm, thereby leading to potential safety hazards is avoided. By introducing the brake device, obtaining the usage state of the brake device, controlling the air compressor to be enabled within a preset enabling time, and obtaining an enabling result, the enabling timeout fault of the system can be identified faster, leaving more time for the vehicle to quickly enter a safe state and handle faults.

[0075] The specific embodiments of the vehicle of the present invention are basically the same as those of the following embodiments of the air compressor control program, and will not be elaborated here.

[0076] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of the first embodiment of the air compressor control method of the present invention. The air compressor control method provided in this embodiment includes the following steps:

[0077] Step S10, when detecting an enabling request sent by the control device, obtain the air storage tank pressure switch state of the air storage tank device and the first pressure data of the air pressure detection component, and determine whether the vehicle needs to be refueled;

[0078] The vehicle states of a new energy vehicle include the vehicle startup stage before startup and the vehicle driving stage after startup. Before the new energy vehicle starts up, it is detected that the vehicle is powered on. At the same time, the vehicle controller in the control device sends an enabling request to the high-voltage auxiliary controller, and real-time monitors the state of the air storage tank pressure switch in the air storage tank device and the first pressure data of the pressure detection component to determine whether the vehicle needs to be refueled. When refueling is required, a refueling instruction is sent to the high-voltage auxiliary controller to enable the high-voltage auxiliary controller to control the air compressor. Among them, the enabling request is a request to control the air compressor to inflate the air storage tank. When the vehicle is in the vehicle driving stage, it is not necessary to detect whether the vehicle is powered on. Instead, the state of the air storage tank pressure switch and the first pressure data obtained by real-time monitoring through the vehicle controller can be directly used to determine whether the vehicle needs to be refueled.

[0079] Specifically, when the state of the air storage tank pressure switch is high level 1, or the first pressure value of any of the loop pressure sensors in the pressure detection component is less than or equal to the preset first pressure value, it is determined that the vehicle needs to be refueled. Among them, the preset first pressure value is 650 kPa. In this embodiment, when the state of the air storage tank pressure switch is high level 1, and when the first pressure value of any loop sensor is less than 650 kPa, it means that the air pressure in the air storage tank is lower than 650 kPa. At this time, when the vehicle is in the startup stage, the vehicle cannot start normally and enter the READY state, so the vehicle needs to be refueled to make the vehicle enter the READY state. When the vehicle is in the driving stage, that is, the vehicle needs to be refueled to prevent the vehicle from having a braking failure. In this embodiment, to prevent faults such as missing installation, failure, and open circuit of the air storage tank pressure switch, and to prevent faults or signal errors of the pressure sensor, two signals are used for verification control, which improves the accuracy of refueling judgment.

[0080] In one embodiment, refer to Figure 4 , the step S10 further includes:

[0081] Step S11, obtaining the state of the air storage tank pressure switch of the air storage tank device and the first pressure values of the two loop pressure sensors;

[0082] Step S12, comparing the state of the air storage tank pressure switch and the first pressure value with the preset refueling conditions to determine the refueling requirement of the vehicle;

[0083] In this embodiment, the air storage tank pressure switch state includes high level 1 and low level 0. Among them, the air storage tank pressure switch is at high level 1 when the air pressure is lower than 650 kPa, and the rest are at low level 0. The preset energy replenishment condition is that the air storage tank pressure switch state is at high level 1, or the first pressure value of any of the loop air pressure sensors in the air pressure detection component is less than or equal to 650 kPa. Whether the vehicle is in the starting stage or the driving stage, the preset energy replenishment condition needs to be met to replenish energy to the vehicle, which can fully ensure the braking safety of the vehicle after starting and during driving.

[0084] When the air storage tank pressure switch state and the first pressure value meet the preset energy replenishment condition, it indicates that the air pressure in the air storage tank cannot reach the driving condition, so it is determined that the vehicle needs to replenish energy. When the air storage tank pressure switch state and the first pressure value do not meet the preset energy replenishment condition, it indicates that the air pressure in the air storage tank has reached the driving condition, so it is determined that the vehicle does not need to replenish energy. And it should be noted that when the judgment result is that no energy replenishment is required, the vehicle can directly enter the READY state and then start driving.

[0085] Step S20, if the vehicle needs to replenish energy, obtain the usage status of the braking device, control the air compressor to be enabled within a preset enabling time, and obtain an enabling result;

[0086] The usage status of the braking device includes two states: used and unused, that is, the operator steps on the brake pedal and does not step on the brake pedal. The enabling result includes enabling timeout and normal enabling. Within a preset enabling time, the state of the brake pedal switch is judged. If the brake pedal is stepped on during the judgment process, it is considered that there is a situation of using the brake and consuming the air source during the enabling process, and the preset enabling time can be appropriately lengthened, such as 600 s (which can be calibrated according to the specific vehicle model); if no brake pedal switch action is recognized within a preset enabling time, it is considered that there is no braking and no air consumption behavior during the air injection and energy replenishment process, so the timeout preset enabling time is shortened, such as 360 s (which can be calibrated according to the specific vehicle model). The enabling is to control the air compressor to replenish air to the air storage tank. If the vehicle needs to replenish energy, according to the usage status of the braking device, the preset enabling time of the air compressor is divided into a first preset enabling time and a second preset enabling time, and the air compressor is respectively controlled to be enabled for the first preset enabling time and the second preset enabling time.

[0087] Specifically, when energy replenishment is required, the signal transmission process of the air compressor control system is as follows: the vehicle controller sends an energy replenishment instruction to the high-voltage auxiliary controller to enable the high-voltage auxiliary controller to control the enabling of the air compressor. Further, if the vehicle needs energy replenishment and the braking device is in the used state, it is judged whether the vehicle enabling time exceeds the first preset time; if the vehicle needs energy replenishment and the braking device is in the unused state, it is judged whether the vehicle enabling time exceeds the second preset time, where the first preset time is greater than the second preset time. The first preset time is 600s, and the second preset enabling time is 360s. The preset energy replenishment time can be specifically set according to the vehicle model, and the present invention does not limit this here.

[0088] Step S30: Obtain the second pressure data of the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading assembly device according to the enabling result, and control the air compressor to work;

[0089] The second pressure data includes the second pressure values of two loop sensors.

[0090] In an embodiment, step S30 further includes:

[0091] Step A31: If the enabling result is normal enabling, obtain the second pressure values of two loop sensors in the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading assembly device;

[0092] Step A32: Stop the enabling of the air compressor when the second pressure value and the unloading valve air pressure switch state reach the preset stop enabling condition;

[0093] Specifically, since the unloading of the unloading valve is an instantaneous state, the unloading valve air pressure switch is at a high level of 1 when not unloading, and the rest are at a low level of 0; the preset stop enabling condition includes: the unloading valve air pressure switch is in the low level 0 state, and the pressure value of at least one loop sensor among the two loop voltage sensors is greater than or equal to the second preset pressure value; or the second pressure values of the two loop voltage sensors are both greater than the second preset pressure value, where the preset second pressure value can be 780 kPa. Of course, those skilled in the art can also set different preset second pressure values according to the vehicle model, such as 800 kPa or 750 kPa, and the present invention does not limit this here.

[0094] Since the vehicle includes a starting stage and a driving stage, when the vehicle is in the starting stage, after reaching the preset stop enabling condition, the vehicle controller in the control device closes the enabling instruction of the high-voltage auxiliary controller, and the vehicle immediately stops enabling the air compressor and enters the READY state, and then the vehicle can be started at any time. When the vehicle is in the driving stage, after reaching the preset enabling condition, the vehicle immediately stops enabling the air compressor and executes step S10 until it is determined that the vehicle needs to be refueled.

[0095] Step A33, when the second pressure value and the state of the unloading valve air pressure switch do not reach the preset stop enabling condition, it is determined that the vehicle needs to be refueled, and the following step is executed: step S20.

[0096] If the preset stop enabling condition is not reached, it means that the air pressure in the air storage tank has not reached the maximum value at this time. Therefore, to ensure sufficient air pressure in the air storage tank, it can be directly determined that the vehicle needs to be refueled, and according to the usage state of the braking device, it is judged again whether the enabling times out until the second pressure value and the state of the unloading valve air pressure switch reach the preset stop enabling condition. In this embodiment, whether the vehicle is in the driving state or the starting state, by judging whether the air compressor reaches the preset stop enabling condition, the stage work of the air compressor can be realized, the service life of the air compressor can be extended, and at the same time, the braking air pressure of the vehicle can be ensured, thereby ensuring the driving safety of the vehicle.

[0097] The present invention provides an air compressor control method. By introducing a braking device, obtaining the usage state of the braking device, controlling the air compressor to be enabled within a preset enabling time to obtain an enabling result, the enabling timeout fault of the system can be identified more quickly, leaving more time for the vehicle to quickly enter a safe state and handle the fault response; by obtaining the second pressure data of the air pressure detection component and the state of the unloading valve air pressure switch of the dryer with unloading valve assembly device according to the enabling result, controlling the operation of the air compressor; or determining the fault type of the air compressor according to the enabling result, the second pressure data of the air pressure detection component, the state of the unloading valve air pressure switch of the dryer with unloading valve assembly device and the state of the air storage tank air pressure switch, realizing the mutual verification of two switches and two air pressure sensors, and quickly locking the fault location. By obtaining the state of the air storage tank air pressure switch of the air storage tank device and the first pressure data of the air pressure detection component when detecting the enabling request sent by the control device, it is judged whether the vehicle needs to be refueled, avoiding the problem of inaccurate air compressor enabling judgment and further causing the problem of vehicle safety risk.

[0098] Further, please refer to Figure 5 , Figure 5 To present the second embodiment of the air compressor control method of the present application based on the first embodiment of the air compressor control method of the present application, in this embodiment, after step S12, it further includes:

[0099] Step S121, if the energy replenishment requirement is to replenish energy, determine whether the first pressure value meets the preset low air pressure alarm condition;

[0100] Step S122, if it meets the low air pressure alarm condition, generate a vehicle braking alarm fault and execute the step: Step S20.

[0101] In this embodiment, since the energy replenishment requirement is to replenish energy, it is possible to further determine whether the vehicle meets the preset low air pressure alarm condition. The preset low air pressure alarm condition is that the first pressure value of any one of the two loop air pressure sensors is less than the third preset pressure value, where the third preset pressure value is 550 kPa. The specific control process is as follows: The vehicle control unit (VCU) judges the low air pressure of the system based on the pressures of the two-way air pressure sensors sent by the instrument (IC). When the system pressure of any loop is lower than the third preset pressure value, the braking system alarm fault is lit. When the first pressure value meets the preset low air pressure alarm condition, it means that the air pressure in the air storage tank in the air compressor control system has been lower than the normal value. If it is lower than 550 kPa, it will affect the vehicle braking. At this time, the low air pressure alarm fault needs to be started to remind the driver to replenish energy in time. When the vehicle meets the preset low air pressure alarm condition, it must meet the preset energy replenishment condition. Therefore, further judgment on the timeout of the air compressor enablement is carried out, that is, step S20 is executed.

[0102] In one embodiment, after the step 122, it further includes:

[0103] Step A123, if the enablement result is enablement timeout and the vehicle has a braking alarm fault, limit the speed and power of the vehicle, and obtain the second pressure data of the air pressure detection component, the unloading valve air pressure switch state of the dryer with unloading valve assembly device, and the air storage tank air pressure switch state, and determine the fault type of the air compressor.

[0104] In this embodiment, when an enable timeout fault occurs in a moving vehicle, the vehicle speed and power of the whole vehicle will be further limited, and the vehicle fault warning light will be lit to remind the driver to pull over as soon as possible and repair the braking system to ensure the safety of vehicle driving. When the enable result is an enable timeout, it can be determined that a fault has occurred in the air compressor control system. Due to the enable timeout, the second pressure value of the air compressor control system will not exceed the preset second pressure value, that is, 780 kPa. And there will inevitably be a fault problem in one or more of the air pressure detection component, the unload valve air pressure switch, and the air receiver air pressure switch. And because the probability of simultaneous faults in the air pressure detection component, the unload valve air pressure switch, and the air receiver air pressure switch during actual use is extremely small, and the data and states among the four are displayed according to the time sequence. Therefore, the mutual verification among the four can be realized according to the second pressure data of the two loop sensors in the air pressure detection component, the state of the unload air pressure switch, and the state of the air receiver air pressure switch. For example, during the energy replenishment process, the air pressure detection component and the air receiver air pressure switch are the first to detect a change in the pressure value, followed by the unload valve air pressure switch. When the second pressure data of the two loop air pressure sensors shows inconsistent air pressure, it means that one of the loop air pressure sensors has a fault; if the second pressure values of the two loop air pressure sensors are the same and neither reaches the second preset pressure value, but the state of the unload valve air pressure switch is high level 1 and the state of the air receiver switch is 1, it means that the unloading pressure value of the unload valve air pressure switch, that is, the second preset pressure value, has not been reached, and the state of the unload valve air pressure switch is high level 1, that is, the state of the unload valve air pressure switch has a fault; if the second pressure values of the two loop air pressure sensors are the same and both reach the second preset pressure value, and the unload valve air pressure switch is at a high level while the state of the air receiver air pressure switch is 1, it means that the air receiver air pressure switch has a fault. And so on. When multiple components have faults, the specific fault points can be specifically judged according to the sequence of state switching of each component or by replacing a certain component.

[0105] In this embodiment, by separating the air compressor enable and the low air pressure alarm, the triggering of the vehicle safety limit strategy caused by their overlap is avoided, and the frequent speed limit of the vehicle is avoided. On the basis of ensuring driving safety, the driving experience of the driver is improved.

[0106] In addition, an embodiment of the present invention also proposes a computer-readable storage medium, on which an air compressor control program is stored. When the air compressor control program is executed by a processor, the following operations are implemented:

[0107] When an enable request sent by the control device is detected, obtain the state of the air receiver air pressure switch of the air receiver device and the first pressure data of the air pressure detection component, and judge whether the vehicle needs to be replenished with energy;

[0108] If the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within a preset enabling time, and obtain an enabling result;

[0109] Obtain the second pressure data of the air pressure detection component and the unloading valve air pressure switch status of the dryer with an unloading valve assembly device according to the enabling result, and control the operation of the air compressor.

[0110] Further, when the air compressor control program is executed by a processor, the following operations are also implemented:

[0111] Obtain the air storage tank air pressure switch status of the air storage tank device and the first pressure values of two loop air pressure sensors;

[0112] Compare the air storage tank air pressure switch status and the first pressure value with preset refueling conditions to determine the refueling requirement of the vehicle.

[0113] Further, when the air compressor control program is executed by a processor, the following operations are also implemented:

[0114] If the refueling requirement is to refuel, determine whether the first pressure value meets the preset low air pressure alarm condition;

[0115] If it meets the low air pressure alarm condition, generate a vehicle braking alarm fault, and execute the step: if the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within a preset enabling time, and obtain an enabling result.

[0116] Further, when the air compressor control program is executed by a processor, the following operations are also implemented:

[0117] If the enabling result is enabling timeout and the vehicle has a braking alarm fault, limit the speed and power of the vehicle, and obtain the second pressure data of the air pressure detection component, the unloading valve air pressure switch status of the dryer with an unloading valve assembly device, and the air storage tank air pressure switch status to determine the fault type of the air compressor.

[0118] Further, when the air compressor control program is executed by a processor, the following operations are also implemented:

[0119] The step of obtaining the second pressure data of the air pressure detection component and the unloading valve air pressure switch status of the dryer with an unloading valve assembly device according to the enabling result and controlling the operation of the air compressor includes:

[0120] If the enabling result is normal enabling, obtain the second pressure values of two loop sensors in the air pressure detection component and the unloading valve air pressure switch status of the dryer with an unloading assembly device;

[0121] When the second pressure value and the state of the unloader valve air pressure switch reach the preset stop enabling condition, stop the enabling of the air compressor;

[0122] When the second pressure value and the state of the unloader valve air pressure switch do not reach the preset stop enabling condition, it is determined that the vehicle needs to be refueled, and the following steps are executed: If the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within the preset enabling time, and obtain the enabling result.

[0123] Further, please refer to Figure 6 , Figure 6 which is the overall flowchart of the air compressor control method of the present invention when the vehicle starts. Among them, power-on means the vehicle is powered on, VCU is the vehicle controller, SDCAC is the high-voltage auxiliary controller, and enabling timing means controlling the air compressor to be enabled for the preset time. Among them, after the VCU sends an alarm instruction to the IC, it also includes steps such as obtaining the second pressure data of the air pressure detection component, the state of the unloader valve air pressure switch of the dryer with unloader valve assembly device, and the state of the air storage tank air pressure switch, and determining the fault type of the air compressor, etc., to further judge the cause of the enabling timeout fault.

[0124] Further, please refer to Figure 7 and Figure 8 , Figure 7 which is the structural schematic diagram of the existing air compressor control system, Figure 8 and

[0125] The existing air compressor control system includes an air inlet filter 1, an electric air compressor 2, a check valve 3, a dryer with unloader valve assembly 4, an unloader valve air pressure switch 4a, an air storage tank 5, an air storage tank air pressure switch 5a, a foot valve 6, a vehicle controller 9, and a high-voltage auxiliary controller 10.

[0126] The existing air compressor control method includes the steps: When receiving an enabling request sent by the vehicle controller, judge whether the air storage tank pressure switch is at a low level. If the air storage tank pressure switch is at a low level, control the vehicle to enter the READY state. If the air storage tank pressure switch is not at a low level, control the air compressor to be enabled and perform an enabling timeout judgment according to the preset enabling time; when enabling times out, the vehicle controller sends an alarm instruction to the vehicle dashboard; when enabling does not time out, judge whether the air compressor enables to end according to the state of the dryer pressure switch, and after enabling ends, control the vehicle to enter the READY state.

[0127] In actual use, since the switch has only two states, in order to correctly enable the system, the air storage tank pressure switch is at high level 1 when the air pressure is lower than 650 kPa, and at low level 0 otherwise. Since the unloading of the unloading valve is an instantaneous state, the air pressure switch at the unloading valve is at high level 1 when not unloading, and at low level 0 otherwise. It can be seen from the above definitions that the air storage tank pressure switch will be in the low level 0 state when the air pressure in the air storage tank is higher than 650 kPa, the switch is damaged, not installed, the wire harness is disconnected, or the fuse is blown. The air pressure switch at the unloading valve will be in the low level 0 state when the unloading valve is unloading, the switch is damaged, not installed, the wire harness is disconnected, or the fuse is blown. Therefore, in the existing state, it is possible that even if the air storage tank pressure switch is damaged, not installed, the wire harness is disconnected, or the fuse is blown, when the actual vehicle air pressure is lower than 650 kPa, the vehicle can still be powered on, no alarm is issued, the vehicle is allowed to drive normally, and the enabling cannot be started, which may pose a great safety hazard. The air pressure switch at the unloading valve will be in the low level 0 state when the switch is damaged, not installed, the wire harness is disconnected, or the fuse is blown. The system cannot determine whether it is actually unloading. When it occurs during dynamic operation, it may cause the early shutdown of the electric air compressor enabling, making the system unable to replenish energy to the maximum pressure; or due to the signal conflict of the two air pressure switches, it may cause the air pumping to time out. In summary, the existing system configuration is simple, but there are many situations that cannot be judged, and it can only rely on the reliability of the switch and the reliability of the connection, etc. This leads to inaccurate judgments when controlling the enabling of the air compressor and controlling the unloading of the air compressor control system, thus affecting driving safety.

[0128] The specific embodiments of the computer-readable storage medium of the present invention are basically the same as the above embodiments of the air compressor control program, and will not be elaborated here.

[0129] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0130] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0131] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes at least two instructions for causing a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0132] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An air compressor control system, characterized in that, The air compressor control system includes: a control device, a braking device, an air storage tank device, a dryer with unloading valve assembly device, an air compressor, and a pressure detection component, which are respectively connected to the control device; wherein, at least two braking pipelines are connected between the braking device and the air storage tank device, the air storage tank device, the dryer with unloading valve assembly device, and the air compressor are sequentially connected through connecting pipelines, and the pressure detection component is installed on the braking pipeline; the control device acquires and controls the enabling of the air compressor according to the usage state of the braking device, the state of the air storage tank pressure switch in the air storage tank device, the state of the unloading valve pressure switch in the dryer with unloading valve assembly device, and the pressure value of the pressure detection component; when receiving the enabling request sent by the control device, if the state of the air storage tank pressure switch is high level or the first pressure value of the pressure detection component is less than or equal to the preset first pressure value, it is determined that the vehicle needs to be refueled; if the vehicle needs to be refueled, acquire the usage state of the braking device, control the air compressor to be enabled within the preset enabling time to obtain an enabling result, where the preset enabling time includes a first preset enabling time and a second preset enabling time; in the case where the enabling result is normal enabling, acquire the second pressure value of the pressure detection component and the state of the unloading valve pressure switch of the dryer with unloading valve assembly device, and stop the enabling of the air compressor when the second pressure value is greater than or equal to the second preset pressure value and the unloading valve pressure switch is in a low level state; wherein, the step of controlling the air compressor to be enabled within the preset enabling time to obtain an enabling result includes: if the vehicle needs to be refueled and the usage state of the braking device is in a used state, determine whether the vehicle enabling time exceeds the first preset time to determine the enabling result; if the vehicle needs to be refueled and the usage state of the braking device is in an unused state, determine whether the vehicle enabling time exceeds the second preset time to determine the enabling result.

2. The air compressor control system according to claim 1, wherein The pressure detection component includes an instrument and at least two loop pressure sensors connected to the instrument. The instrument is connected to the control device, and at least two of the loop pressure sensors are arranged in one-to-one correspondence with at least two of the braking pipelines. Wherein, the pressure detection component is used to detect the pressure value of the braking pipeline.

3. The air compressor control system according to claim 1, characterized in that, The dryer with unloading valve assembly device includes a dryer with unloading valve assembly and an unloading valve pressure switch. The unloading valve pressure switch is arranged on the dryer with unloading valve assembly and is connected to the control device. Wherein, the unloading valve pressure switch is used to provide the state of the unloading valve pressure switch for the control device.

4. The air compressor control system according to claim 1, wherein The braking device includes a foot valve, a brake pedal, and a brake pedal switch arranged on the foot valve. The brake pedal switch is connected to the control device. Wherein, the braking device is used to provide the usage state for the control device.

5. A control method for an air compressor, characterized in that, The air compressor control method is applied to the air compressor control system according to any one of claims 1 to 4. The air compressor control method includes the steps: When an enable request sent by the control device is detected, obtain the air storage tank pressure switch state of the air storage tank device and the first pressure data of the pressure detection component, and determine whether the vehicle needs to be refueled; Among them, if the air storage tank pressure switch state is high level or the first pressure value of the pressure detection component is less than or equal to the preset first pressure value, it is determined that the vehicle needs to be refueled; If the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within the preset enable time, and obtain an enable result, where the preset enable time includes a first preset enable time and a second preset enable time; Obtain the second pressure data of the pressure detection component and the unloading valve pressure switch state of the dryer with unloading valve assembly device according to the enable result, and control the operation of the air compressor; Among them, the step of controlling the air compressor to be enabled within the preset enable time and obtaining an enable result includes: if the vehicle needs to be refueled and the usage status of the braking device is the usage status, determine whether the vehicle enable time exceeds the first preset time to determine the enable result; If the vehicle needs to be refueled and the usage status of the braking device is the non-usage status, determine whether the vehicle enable time exceeds the second preset time to determine the enable result; Among them, in the case where the enable result is normal enabling, when the second pressure value is greater than or equal to the second preset pressure value and the unloading valve pressure switch is in the low level state, stop enabling the air compressor.

6. The air compressor control method according to claim 5, wherein, The first pressure data includes the first pressure values of two circuit air pressure sensors; The steps of obtaining the air storage tank pressure switch state of the air storage tank device and the first pressure data of the pressure detection component, and determining whether the vehicle needs to be refueled include: Obtain the air storage tank pressure switch state of the air storage tank device and the first pressure values of two circuit air pressure sensors; Compare the air storage tank pressure switch state and the first pressure value with the preset refueling conditions to determine the refueling requirement of the vehicle.

7. The air compressor control method according to claim 6, characterized in that, After the step of comparing the air storage tank pressure switch state and the first pressure value with the preset refueling conditions to determine the refueling requirement of the vehicle, it further includes: If the refueling requirement is to refuel, determine whether the first pressure value meets the preset low air pressure alarm condition; If it meets the low air pressure alarm condition, generate a vehicle braking alarm fault, and execute the step: if the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within the preset enable time, and obtain an enable result.

8. The air compressor control method according to claim 7, wherein The air compressor control method further includes: If the enable result is enable timeout and the vehicle has a braking alarm fault, limit the speed and power of the vehicle, and obtain the second pressure data of the pressure detection component, the unloading valve pressure switch state of the dryer with unloading valve assembly device and the air storage tank pressure switch state, and determine the fault type of the air compressor.

9. The air compressor control method according to claim 5, characterized in that, The second pressure data includes the second pressure values of two circuit sensors; The step of obtaining the second pressure data of the pressure detection component and the unloading valve pressure switch state of the dryer with unloading valve assembly device according to the enable result, and controlling the operation of the air compressor includes: If the enabling result is normal enabling, obtain the second pressure values of two loop sensors in the air pressure detection component and the unloading valve air pressure switch state of the dryer with unloading assembly device; When the second pressure value and the unloading valve air pressure switch state reach the preset stop enabling condition, stop the enabling of the air compressor; When the second pressure value and the unloading valve air pressure switch state do not reach the preset stop enabling condition, it is determined that the vehicle needs to be refueled, and the following steps are executed: If the vehicle needs to be refueled, obtain the usage status of the braking device, control the air compressor to be enabled within the preset enabling time, and obtain the enabling result.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an air compressor control program, and when the air compressor control program is executed by a processor, the steps of the air compressor control method according to any one of claims 5 to 9 are implemented.

Images