A method and system for controlling an electric air compressor

Abstract

The application discloses an electric air compressor control method and system, wherein the method comprises the following steps: when the bus air pressure signal of the whole vehicle is normal, the electric air compressor is started and stopped by using a multi-in-one controller according to the bus air pressure and the pressure switch state; and when the bus air pressure signal of the whole vehicle is abnormal, the electric air compressor is started and stopped by using a pressure switch according to the pressure switch state. The application can perform hierarchical control on the electric air compressor, improves the safety of the vehicle, and can make the air compressor continuously and stably work to guarantee that the circuit air pressure is at a standard level during the air pressure braking process, and improves the rationality of fault judgment.

Description

Technical Field

[0001] The present invention relates to the technical field of electric air compressor control, and in particular to an electric air compressor control method and system. Background Art

[0002] With the rapid development of the automotive industry, more and more vehicles are using pneumatic brakes on the market. The existing control system of electric vehicles matched with electric air compressors only uses the pressure switch signal or temperature signal to control whether the air compressor is working. In addition, the fault judgment conditions of the pressure switch are insufficient, which may cause the air compressor to not work without any prompts. However, considering the actual working conditions, the non-operation of the air compressor is a very dangerous situation, and it relies entirely on the pressure switch for protection. The risk is high after the pressure switch fails.

[0003] Therefore, how to control the electric air compressor is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The main purpose of the present invention is to provide an electric air compressor control method and system, which can perform hierarchical control of the electric air compressor, improve the safety of vehicle use, and during the pneumatic braking process, enable the air compressor to work continuously and stably to ensure that the circuit air pressure is at a standard level, while also improving the rationality of fault judgment.

[0005] In a first aspect, the present application provides a method for controlling an electric air compressor, the method comprising the steps of:

[0006] When the bus air pressure signal of the vehicle is normal, the all-in-one controller is used to control the start and stop of the electric air compressor according to the bus air pressure and the status of the pressure switch;

[0007] When the bus air pressure signal of the vehicle is abnormal, the pressure switch is used to control the start and stop of the electric air compressor according to the status of the pressure switch.

[0008] In combination with the first aspect above, as an optional implementation, when the air pressure sensor shows that the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit are both invalid, it is determined that the bus air pressure signal of the electric air compressor is abnormal;

[0009] When it is determined that either the front circuit air pressure signal or the rear circuit air pressure signal of the brake air circuit is not invalid, it is determined that the bus air pressure signal of the electric air compressor is normal.

[0010] In combination with the first aspect above, as an optional implementation, when the bus air pressure is greater than the set air pressure, the air compressor does not work, and the front and rear circuit air pressure sensors are checked using the all-in-one controller;

[0011] When the bus air pressure is lower than the set air pressure and the detection pressure switch is in a low level state, the all-in-one controller is used to control the electric air compressor to work until the bus air pressure is higher than the set air pressure and the detection pressure switch is in a high level state, and then the air compressor is controlled to stop;

[0012] When the bus pressure is lower than the set pressure and the pressure switch is in a high level state,

[0013] The all-in-one controller is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop.

[0014] In combination with the first aspect above, as an optional implementation, when it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to operate until the pressure switch is in a high level state and then stops;

[0015] When it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to work for a preset time. When it is detected that the pressure switch is still in a low level state, the air compressor is controlled to work until the temperature exceeds the set temperature and then automatically stops.

[0016] When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop;

[0017] When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the operation of the electric air compressor. When it is detected that the pressure switch is still in a high level state, the air compressor is controlled to operate until the temperature is greater than the set temperature and then automatically stops.

[0018] In combination with the first aspect above, as an optional implementation, when the bus air pressure is lower than the set air pressure and the pressure switch is at a low level, the all-in-one controller is used to control the air compressor to operate until the bus air pressure is higher than the set air pressure, and after the air compressor operates for more than a first preset time, when the pressure switch is still at a low level, it is determined that the pressure switch is disconnected;

[0019] When the bus air pressure is lower than the set air pressure and the pressure switch is at a high level, the all-in-one controller is used to control the air compressor to work for a second preset time. When the pressure switch is still at a high level, it is determined that the pressure switch is short-circuited.

[0020] In combination with the above first aspect, as an optional implementation method, the set air pressure is 8 bar; the first preset time is 5 minutes; and the second preset time is 10 seconds.

[0021] In combination with the first aspect above, as an optional implementation method, when it is determined that the pressure switch is open or short-circuited, the status of the air compressor is broadcast through the instrument to provide a prompt.

[0022] In a second aspect, the present application provides an electric air compressor control system, the system comprising:

[0023] The all-in-one controller is used to control the start and stop of the electric air compressor according to the bus air pressure and pressure switch status when the bus air pressure signal of the vehicle is normal;

[0024] The dryer is provided with a pressure switch, which is used to control the start and stop of the electric air compressor according to the state of the pressure switch when the bus air pressure signal of the entire vehicle is abnormal.

[0025] In conjunction with the above second aspect, as an optional implementation, an air pressure sensor is used to determine that the bus air pressure signal of the electric air compressor is abnormal when the air pressure sensor indicates that the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit are both invalid;

[0026] When it is determined that either the front circuit air pressure signal or the rear circuit air pressure signal of the brake air circuit is not invalid, it is determined that the bus air pressure signal of the electric air compressor is normal.

[0027] In combination with the above second aspect, as an optional implementation, the all-in-one control is further configured to, when the bus air pressure is less than the set air pressure and the pressure switch is at a low level, use the all-in-one controller to control the air compressor to operate until the bus air pressure is greater than the set air pressure, and after the air compressor operates for more than a first preset time, if the pressure switch is still at a low level, determine that the pressure switch is open;

[0028] When the bus air pressure is lower than the set air pressure and the pressure switch is at a high level, the all-in-one controller is used to control the air compressor to work for a second preset time. When the pressure switch is still at a high level, it is determined that the pressure switch is short-circuited.

[0029] The present application provides a method and system for controlling an electric air compressor, wherein the method includes the following steps: when the bus air pressure signal of the entire vehicle is normal, the electric air compressor is started and stopped using an all-in-one controller according to the bus air pressure and the state of the pressure switch; when the bus air pressure signal of the entire vehicle is abnormal, the electric air compressor is started and stopped using a pressure switch according to the state of the pressure switch. The present application can perform hierarchical control of the electric air compressor, thereby improving the safety of the vehicle, and during the pneumatic braking process, it can enable the air compressor to operate continuously and stably to ensure that the circuit air pressure is at a standard level, while also improving the rationality of fault diagnosis.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0032] Figure 1 This is a flow chart of a method for controlling an electric air compressor provided in an embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of an electric air compressor control system provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of a controller provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of a computer-readable program medium provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0037] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Some of the blocks shown in the drawings are functional entities that do not necessarily correspond to physically or logically separate entities.

[0038] The embodiments of the present application provide an electric air compressor control method and system, which can perform hierarchical control of the electric air compressor, thereby improving the safety of vehicle use. During the pneumatic braking process, the air compressor can continue to work stably to ensure that the circuit air pressure is at a standard level, while also improving the rationality of fault judgment.

[0039] To achieve the above technical effects, the general ideas of this application are as follows:

[0040] A method for controlling an electric air compressor, the method comprising the steps of:

[0041] S101: When the bus air pressure signal of the vehicle is normal, the electric air compressor is controlled to start and stop by the all-in-one controller according to the bus air pressure and the status of the pressure switch.

[0042] S102: When the bus air pressure signal of the entire vehicle is abnormal, the pressure switch is used to control the start and stop of the electric air compressor according to the state of the pressure switch.

[0043] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0044] Reference Figure 1 , Figure 1 The figure shows a flow chart of an electric air compressor control method provided by the present invention. Figure 1 As shown, the method includes the steps of:

[0045] Step S101: When the bus air pressure signal of the vehicle is normal, the electric air compressor is started and stopped by the all-in-one controller according to the bus air pressure and the pressure switch status.

[0046] Specifically, when the bus air pressure is greater than the set air pressure, the air compressor does not work, and the all-in-one controller is used to check the front and rear circuit air pressure sensors;

[0047] When the bus air pressure is lower than the set air pressure and the detection pressure switch is in a low level state, the all-in-one controller is used to control the electric air compressor to work until the bus air pressure is higher than the set air pressure and the detection pressure switch is in a high level state, and then the air compressor is controlled to stop;

[0048] When the bus pressure is lower than the set pressure and the pressure switch is in a high level state,

[0049] The all-in-one controller is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop.

[0050] For easier understanding, an example is given. After the vehicle is powered on, the all-in-one controller checks the air pressure sensor. If the air pressure sensor shows normal or only one air pressure sensor is faulty, the minimum air pressure of the front and rear circuits or the air pressure of the fault-free circuit is taken to determine the air pressure. b)

[0051] If the air pressure is less than 8 bar and the pressure switch is in the low level state, the air compressor starts to work until the air pressure is greater than 8 bar and the pressure switch is in the high level state, then stops. The all-in-one controller continues to check the front and rear air pressure sensors.

[0052] If the air pressure is less than 8 bar and the pressure switch is in a high level state, after the air compressor starts working, if the pressure switch appears a low level once, the pressure switch judgment will be restored, and the air compressor will continue to work until a high level appears again. The all-in-one controller will continue to check the front and rear air pressure sensors.

[0053] It is understandable that the addition of pressure switch status detection can simultaneously detect whether there is a problem with the pressure switch when the all-in-one controller is controlling it. When the pressure switch is detected to be normal, when both the front circuit and the rear circuit of the brake air circuit fail, full control is handed over to the pressure switch. When a problem is detected with the pressure switch, the air compressor automatically shuts down after reaching the preset temperature. It should also be noted that the signal to stop air is provided by the pressure switch. When the air compressor is fully inflated, the dryer will provide a stream of compressed air to the pressure switch, and the pressure switch signal changes, thereby notifying the all-in-one controller that the air compressor is now fully inflated.

[0054] In one embodiment, if the air pressure is less than 8 bar and the pressure switch is in a low-level state, the air compressor starts to operate until the air pressure exceeds 8 bar for more than 5 minutes but the pressure switch is still in a low-level state, the instrument will report "Pressure switch signal is unreliable, please enter the station for inspection", the air compressor will stop, and the all-in-one controller will continue to check the front and rear air pressure sensors.

[0055] In one embodiment, if the air pressure is less than 8 bar and the pressure switch is in a high-level state, the air compressor starts to work. After 10 seconds, the pressure switch is still in a high-level state, and the instrument reports "Pressure switch short circuit, please enter the station for inspection". At the same time, the air compressor works until the bus air pressure is greater than 8 bar and lasts for 5 minutes. The air compressor stops and the all-in-one controller continues to check the front and rear air pressure sensors.

[0056] In one embodiment, if the air pressure is less than 8 bar and the pressure switch is in a high-level state, after the air compressor is operating, the bus air pressure remains less than 8 bar for 10 minutes, and the instrument reports "Please check the entire vehicle and air compressor for leaks." The air compressor remains in operation until it shuts down due to high temperature. The instrument also reports "Air compressor overtemperature shutdown." After the air compressor temperature drops, the all-in-one controller continues to check the front and rear air pressure sensors.

[0057] It should be noted that the input conditions of the air compressor control system include the bus air pressure status, the pressure switch signal and the air compressor temperature signal; among them, the bus air pressure signal has a higher priority than the pressure switch signal, and the temperature signal is used as a condition to ensure the normal operation of the air compressor.

[0058] The bus air pressure status is determined by the front and rear circuit air pressure sensors; when the front and rear circuit air pressure signals of the brake air circuit fail and the bus air pressure cannot be determined, the pressure switch is used to control the start and stop of the air compressor; otherwise, when only one air pressure signal fails or both air pressure signals are normal, this strategy uses the bus air pressure to control the operation of the air compressor.

[0059] After using the multi-in-one to check for faults in the front and rear air pressure sensors, if only one air pressure signal fails or both air pressure signals are normal, the bus air pressure is used to control the operation of the air compressor. The control method is: when the bus air pressure is less than 8 bar, the air compressor will work directly until the dryer is fully unloaded or shut down due to high temperature. At the same time, because of the bus air pressure status, this strategy can monitor whether the pressure switch is working properly or whether the signal is credible; the judgment method is: after checking that the bus air pressure is less than 8 bar and the pressure switch is at a low level, the air compressor works until the bus air pressure is greater than 8 bar and the air compressor works for more than 5 minutes, and the pressure switch is still at a low level, it can be judged that the pressure switch signal is unreliable; when the bus air pressure is less than 8 bar but the pressure switch is at a high level, the pressure switch is still at a high level after the air compressor has been working for 10 seconds, and it can be judged that the pressure switch is short-circuited.

[0060] It should be noted that the bus air pressure status is determined by the front and rear circuit air pressure sensors; when the front and rear circuit air pressure signals of the brake air circuit fail and the bus air pressure cannot be determined, that is, the all-in-one controller cannot determine it, the pressure switch is used to control the start and stop of the air compressor; otherwise, when only one air pressure signal fails or both air pressure signals are normal, this strategy uses the bus air pressure (all-in-one controller) to control the operation of the air compressor.

[0061] The working status of the air compressor is first determined by the bus air pressure status. If only one air pressure signal fails or both air pressure signals are normal, and the bus air pressure is less than 8 bar, the air compressor will work directly until the dryer is fully unloaded or it shuts down due to high temperature. When both air pressure sensors fail, the air compressor will continue to work and will only shut down when it determines that the pressure switch signal is credible and the pressure switch is at a high level. Otherwise, it will continue to work until the air compressor shuts down due to high temperature.

[0062] In one embodiment, when the bus pressure is lower than the set pressure and the pressure switch is at a low level, the all-in-one controller is used to control the air compressor to operate until the bus pressure is higher than the set pressure, and after the air compressor operates for more than a first preset time, if the pressure switch is still at a low level, it is determined that the pressure switch is disconnected.

[0063] When the bus air pressure is lower than the set air pressure and the pressure switch is at a high level, the all-in-one controller is used to control the air compressor to work for a second preset time. When the pressure switch is still at a high level, it is determined that the pressure switch is short-circuited.

[0064] For ease of understanding, let's take an example. When the bus pressure is less than 8 bar and the pressure switch is at a low level, the air compressor works until the bus pressure is greater than 8 bar and the air compressor works for more than 5 minutes. If the pressure switch is still at a low level, it can be determined that the pressure switch signal is open. When the bus pressure is less than 8 bar but the pressure switch is at a high level, the pressure switch is still at a high level after the air compressor works for 10 seconds. It can be determined that the pressure switch is short-circuited.

[0065] In one embodiment, when the air pressure sensor shows that the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit are both failed, it is judged that the bus air pressure signal of the electric air compressor is abnormal; when it is determined that any one of the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit is not failed, it is judged that the bus air pressure signal of the electric air compressor is normal.

[0066] Step S102: When the bus air pressure signal of the entire vehicle is abnormal, the pressure switch is used to control the start and stop of the electric air compressor according to the state of the pressure switch.

[0067] Specifically, after the all-in-one controller checks the air pressure sensor, if the air pressure sensor shows that both air pressures (the front circuit and the rear circuit) are faulty, the pressure switch is used for full control.

[0068] In one embodiment, when it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to operate until the pressure switch is in a high level state and then stops;

[0069] When it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to work for a preset time. When it is detected that the pressure switch is still in a low level state, the air compressor is controlled to work until the temperature exceeds the set temperature and then automatically stops.

[0070] When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop;

[0071] When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the operation of the electric air compressor. When it is detected that the pressure switch is still in a high level state, the air compressor is controlled to operate until the temperature is greater than the set temperature and then automatically stops.

[0072] For easier understanding, let's take an example. If the pressure switch is in a low level state, the air compressor will work until the pressure switch is in a high level state and then stop. The all-in-one controller will continue to check the front and rear air pressure sensors.

[0073] If the pressure switch is in a low-level state and the air compressor has been operating for 10 minutes, the pressure switch is still in a low-level state, and the instrument reports "Pressure switch signal is unreliable, please enter the station for inspection". The air compressor remains in operation until it shuts down due to high temperature. The instrument also reports "Air compressor overtemperature shutdown". After the air compressor temperature drops, the all-in-one controller continues to check the front and rear air pressure sensors.

[0074] If the pressure switch is in a high level state, the air compressor works until the pressure switch appears a low level state. At this time, the air compressor is still in the working state until the pressure switch is in a high level state. The air compressor stops and the all-in-one controller continues to check the front and rear air pressure sensors.

[0075] If the pressure switch is in the high level state, the pressure switch is still in the high level state after the air compressor is working, the air compressor will work until it stops due to high temperature, and the instrument will report "air compressor overtemperature shutdown". After the air compressor temperature drops, the all-in-one controller will continue to check the front and rear air pressure sensors.

[0076] It should be noted that after using the all-in-one to check for front and rear air pressure sensor faults, if both air pressure lines fail, the pressure switch signal is used to control the air compressor. The control method is: regardless of whether the pressure switch is at a low or high level, the air compressor will continue to operate until it shuts down due to a high level or high temperature. Alternatively, if the pressure switch is at a high level, the air compressor will continue to operate until it reaches a low level, then continue to operate until it shuts down due to a high level or high temperature.

[0077] Reference Figure 2 , Figure 2 The figure shows a schematic diagram of an electric air compressor control system provided by the present invention. Figure 2 As shown, the system includes:

[0078] All-in-one controller: When the bus air pressure signal of the vehicle is normal, the all-in-one controller is used to control the start and stop of the electric air compressor according to the bus air pressure and pressure switch status.

[0079] Dryer: It is equipped with a pressure switch, which is used to control the start and stop of the electric air compressor according to the state of the pressure switch when the bus air pressure signal of the entire vehicle is abnormal.

[0080] Furthermore, in one possible embodiment, the invention further includes an air pressure sensor, which is used to determine that the bus air pressure signal of the electric air compressor is abnormal when the air pressure sensor indicates that the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit are both invalid;

[0081] When it is determined that either the front circuit air pressure signal or the rear circuit air pressure signal of the brake air circuit is not invalid, it is determined that the bus air pressure signal of the electric air compressor is normal.

[0082] Furthermore, in a possible embodiment, the all-in-one controller is further configured to, when the bus air pressure is greater than the set air pressure, disable the air compressor, and utilize the all-in-one controller to check the front and rear circuit air pressure sensors;

[0083] When the bus air pressure is lower than the set air pressure and the detection pressure switch is in a low level state, the all-in-one controller is used to control the electric air compressor to work until the bus air pressure is higher than the set air pressure and the detection pressure switch is in a high level state, and then the air compressor is controlled to stop;

[0084] When the bus pressure is lower than the set pressure and the pressure switch is in a high level state,

[0085] The all-in-one controller is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop.

[0086] Furthermore, in a possible embodiment, the dryer is provided with a pressure switch, and is further configured to, when it is determined that the pressure switch is in a low level state, control the electric air compressor to operate by using the pressure switch until the pressure switch is in a high level state and then stops;

[0087] When it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to work for a preset time. When it is detected that the pressure switch is still in a low level state, the air compressor is controlled to work until the temperature exceeds the set temperature and then automatically stops.

[0088] When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop;

[0089] When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the operation of the electric air compressor. When it is detected that the pressure switch is still in a high level state, the air compressor is controlled to operate until the temperature is greater than the set temperature and then automatically stops.

[0090] Furthermore, in a possible embodiment, the all-in-one controller is further configured to, when the bus air pressure is lower than the set air pressure and the pressure switch is at a low level, control the air compressor to operate until the bus air pressure is higher than the set air pressure, and after the air compressor operates for more than a first preset time, if the pressure switch is still at a low level, determine that the pressure switch is open;

[0091] When the bus air pressure is lower than the set air pressure and the pressure switch is at a high level, the all-in-one controller is used to control the air compressor to work for a second preset time. When the pressure switch is still at a high level, it is determined that the pressure switch is short-circuited.

[0092] Furthermore, in a possible implementation manner, the all-in-one controller is also used to set the air pressure to 8 bar; the first preset time length is 5 minutes; and the second preset time length is 10 seconds.

[0093] Furthermore, in a possible implementation manner, the instrument is used to broadcast the status of the air compressor through the instrument to provide a prompt when it is determined that the pressure switch is open or short-circuited.

[0094] It should be noted that the dryer transmits a hard-wired signal from the pressure switch to the air compressor controller, controlling the compressor's start and stop. The air compressor control can also be integrated with other controllers into an all-in-one controller. The all-in-one controller receives a hard-wired signal from the dryer's pressure switch. (The pressure switch provides the signal to stop pumping. When the compressor is fully pumped, the dryer delivers a burst of compressed air to the pressure switch. This change in the pressure switch signal informs the all-in-one controller that the compressor is fully pumped.) The all-in-one controller also receives a signal from the pressure switch to assist in detecting whether the pressure switch is reliable (faulty). During the period between dryer unloading and re-injection, the pressure switch outputs a high level, shutting down the compressor. During this period, the pressure switch outputs a low level, keeping the compressor running. A temperature sensor is also included to determine the compressor's temperature. When the compressor temperature exceeds the set point, a temperature signal is sent to the all-in-one controller to shut down the compressor. The air pressure sensor is used to determine and display the bus pressure status. It can also send a voltage signal to the instrument, which provides prompts. The air pressure sensor is detected by the all-in-one controller. The instrument sends the air pressure signal to the all-in-one controller and broadcasts the air compressor fault status, namely, fault information, for prompts.

[0095] For all-in-one controllers, refer to Figure 3 The electronic device 300 according to this embodiment of the present invention will be described. Figure 3 The electronic device 300 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0096] like Figure 3 As shown, electronic device 300 is implemented as a general-purpose computing device. Components of electronic device 300 may include, but are not limited to, the aforementioned at least one processing unit 310, the aforementioned at least one storage unit 320, and a bus 330 connecting various system components (including storage unit 320 and processing unit 310).

[0097] The storage unit stores program codes, which can be executed by the processing unit 310, so that the processing unit 310 performs the steps according to various exemplary embodiments of the present invention described in the above “Example Method” section of this specification.

[0098] The storage unit 320 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 321 and / or a cache memory unit 322 , and may further include a read-only memory unit (ROM) 323 .

[0099] The storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, such program modules 325 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0100] Bus 330 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0101] The electronic device 300 can also communicate with one or more external devices (e.g., a keyboard, a pointing device, a Bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 300, and / or any device that enables the electronic device 300 to communicate with one or more other computing devices (e.g., a router, a modem, etc.). Such communication can occur via an input / output (I / O) interface 350. Furthermore, the electronic device 300 can also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 360. As shown, the network adapter 360 communicates with other modules of the electronic device 300 via a bus 330. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device 300, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0102] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0103] According to the solution of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above-mentioned method of this specification is stored. In some possible implementations, various aspects of the present invention may also be implemented in the form of a program product, which includes program code. When the program product is executed on a terminal device, the program code is used to cause the terminal device to perform the steps according to various exemplary embodiments of the present invention described in the "Exemplary Methods" section of this specification.

[0104] refer to Figure 4 As shown, a program product 400 for implementing the above method according to an embodiment of the present invention is described. The program product 400 may be a portable compact disc read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0105] The program product may be implemented in any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0106] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0107] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0108] The program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, and the like, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a stand-alone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0109] Furthermore, the above-described figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention and are not intended to be limiting. It is readily understood that the processes illustrated in the above-described figures do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0110] In summary, the present application provides an electric air compressor control method and system, wherein the method includes the following steps: when the bus air pressure signal of the entire vehicle is normal, the electric air compressor is controlled to start and stop by an all-in-one controller according to the bus air pressure and the state of the pressure switch; when the bus air pressure signal of the entire vehicle is abnormal, the electric air compressor is controlled to start and stop by a pressure switch according to the state of the pressure switch. The present application can perform hierarchical control of the electric air compressor, thereby improving the safety of the vehicle, and during the pneumatic braking process, it can enable the air compressor to operate continuously and stably to ensure that the circuit air pressure is at a standard level, while also improving the rationality of fault judgment.

[0111] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

[0112] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

Claims

1. A method for controlling an electric air compressor, characterized in that: include: When the bus air pressure signal of the vehicle is normal, the all-in-one controller is used to control the start and stop of the electric air compressor according to the bus air pressure and the status of the pressure switch; When the bus air pressure signal of the vehicle is abnormal, the pressure switch is used to control the start and stop of the electric air compressor according to the status of the pressure switch; Among them, when the air pressure sensor shows that the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit are all invalid, it is judged that the bus air pressure signal of the electric air compressor is abnormal; When it is determined that either the front circuit air pressure signal or the rear circuit air pressure signal of the brake air circuit is not invalid, it is determined that the bus air pressure signal of the electric air compressor is normal; When it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to work until the pressure switch is in a high level state and then stops; When it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to work for a preset time. When it is detected that the pressure switch is still in a low level state, the air compressor is controlled to work until the temperature exceeds the set temperature and then automatically stops. When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop; When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the operation of the electric air compressor. When it is detected that the pressure switch is still in a high level state, the air compressor is controlled to operate until the temperature is greater than the set temperature and then automatically stops.

2. The method according to claim 1, characterized in that The method of controlling the start and stop of the electric air compressor by using the all-in-one controller according to the bus air pressure and the pressure switch status includes: When the bus air pressure is greater than the set air pressure, the air compressor does not work. Use the all-in-one controller to check the front and rear circuit air pressure sensors. When the bus air pressure is lower than the set air pressure and the detection pressure switch is in a low level state, the all-in-one controller is used to control the electric air compressor to work until the bus air pressure is higher than the set air pressure and the detection pressure switch is in a high level state, and then the air compressor is controlled to stop; When the bus pressure is lower than the set pressure and the pressure switch is in a high level state, The all-in-one controller is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop.

3. The method according to claim 1, characterized in that Also includes: When the bus air pressure is lower than the set air pressure and the pressure switch is at a low level, the all-in-one controller is used to control the air compressor to work until the bus air pressure is higher than the set air pressure, and the air compressor works for more than a first preset time. When the pressure switch is still at a low level, it is determined that the pressure switch is open. When the bus air pressure is lower than the set air pressure and the pressure switch is at a high level, the all-in-one controller is used to control the air compressor to work for a second preset time. When the pressure switch is still at a high level, it is determined that the pressure switch is short-circuited.

4. The method according to claim 3, wherein: The set air pressure is 8 bar; the first preset time is 5 minutes; and the second preset time is 10 seconds.

5. The method according to claim 3, characterized in that Also includes: When it is determined that the pressure switch is open or short-circuited, the status of the air compressor will be broadcast through the instrument to provide a prompt.

6. An electric air compressor control system, characterized in that: Also includes: The all-in-one controller is used to control the start and stop of the electric air compressor according to the bus air pressure and pressure switch status when the bus air pressure signal of the vehicle is normal; The dryer is equipped with a pressure switch, which is used to control the start and stop of the electric air compressor according to the state of the pressure switch when the bus air pressure signal of the entire vehicle is abnormal; An air pressure sensor is used to determine that the bus air pressure signal of the electric air compressor is abnormal when the air pressure sensor indicates that the front circuit air pressure signal and the rear circuit air pressure signal of the brake air circuit are both invalid; When it is determined that either the front circuit air pressure signal or the rear circuit air pressure signal of the brake air circuit is not invalid, it is determined that the bus air pressure signal of the electric air compressor is normal; The dryer is provided with a pressure switch, and is further used to control the electric air compressor to work by using the pressure switch when it is determined that the pressure switch is in a low level state until the pressure switch is in a high level state and then stops; When it is determined that the pressure switch is in a low level state, the pressure switch is used to control the electric air compressor to work for a preset time. When it is detected that the pressure switch is still in a low level state, the air compressor is controlled to work until the temperature exceeds the set temperature and then automatically stops. When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the electric air compressor to work until the pressure switch appears in a low level state once and then returns to a high level state, and then the air compressor is controlled to stop; When it is determined that the pressure switch is in a high level state, the pressure switch is used to control the operation of the electric air compressor. When it is detected that the pressure switch is still in a high level state, the air compressor is controlled to operate until the temperature is greater than the set temperature and then automatically stops.

7. The system according to claim 6, characterized in that: The all-in-one controller is further configured to, when the bus air pressure is lower than the set air pressure and the pressure switch is at a low level, control the air compressor to operate until the bus air pressure is higher than the set air pressure, and after the air compressor operates for a period exceeding a first preset time, determine that the pressure switch is disconnected when the pressure switch is still at a low level; When the bus air pressure is lower than the set air pressure and the pressure switch is at a high level, the all-in-one controller is used to control the air compressor to work for a second preset time. When the pressure switch is still at a high level, it is determined that the pressure switch is short-circuited.

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