Control method and device of electronic parking system and vehicle

Abstract

The invention discloses a control method and device for an electronic parking system and a vehicle. The method comprises the steps that a parking control instruction is received, when the parking control instruction is a parking braking force detection control instruction, a first electric control valve can be controlled to enable a first mechanical valve to be switched off, and a second electric control valve can be controlled to enable a second mechanical valve to be switched off; furthermore, the parking braking force detection function can be achieved when the air inlet end and the air outlet end of the proportional relay valve are conducted through the voltage control device, or the parking braking force detection function can be achieved when the air outlet end and the air outlet end of the proportional relay valve are conducted through the voltage control device. The independent braking function of the trailer is achieved. When a parking control instruction is received, coordination control over the first electric control valve, the first mechanical valve and the proportional relay valve can be achieved, the parking braking force detection function and the trailer independent braking function are achieved, the control structure and the control process of the electronic parking system are simple, and the control cost is low. The manufacturing cost and the maintenance cost of the electronic parking system can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a control method and device for an electronic parking system and a vehicle. Background Art

[0002] With the continuous advancement of automotive electronics and intelligence, electronic parking systems are becoming increasingly widely used in the automotive field. However, traditional mechanical parking brakes have shortcomings such as complex operation, slow response, and uncontrollable parking force. They are no longer able to meet the safety, comfort, and intelligent control requirements of modern vehicles.

[0003] In the prior art, the on-off and pressure regulation of compressed air are mainly controlled by integrating components such as solenoid valves and proportional relay valves, thereby realizing functions such as parking brake, release and braking force detection to solve the above problems. However, the existing technical solutions have the problem that when the valve body components are relatively few, the requirements of the tractor for the train parking brake force detection and the independent braking control of the trailer cannot be realized, and when the valve body components are relatively many, the control structure of the electronic parking system is complex, the control process is cumbersome, and the manufacturing and subsequent maintenance costs are high. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, an object of the present invention is to propose a control method for an electronic parking system, which can shut down the first mechanical valve through a first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected through a voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected through a voltage control device. That is, by setting the first electrically controlled valve, the first mechanical valve and the proportional relay valve, and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0006] To this end, a second object of the present invention is to provide a control device for an electronic parking system.

[0007] To this end, a third object of the present invention is to provide a vehicle.

[0008] To this end, a fourth object of the present invention is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, an embodiment of a first aspect of the present invention provides a control method for an electronic parking system, the electronic parking system comprising: an air inlet, an air outlet, an exhaust port, a pressurizing solenoid valve, a pressure reducing solenoid valve, a first electrically controlled valve, a first mechanical valve, and a proportional relay valve. The method comprises the following steps: receiving a parking control instruction, wherein the parking control instruction includes a parking brake force detection control instruction or a trailer independent braking control instruction; When the parking control instruction is the parking brake force detection control instruction, the first electrically controlled valve is energized to disconnect the air inlet and air outlet of the first mechanical valve connected to the first electrically controlled valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet of the first mechanical valve, thereby cutting off the air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet; at the same time, the pressurizing solenoid valve is energized to connect the air inlet and air outlet of the proportional relay valve, thereby allowing compressed air from the air inlet connected to the air inlet of the proportional relay valve to enter the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet of the proportional relay valve, thereby realizing the parking brake force detection function; Alternatively, when the parking control instruction is the trailer independent braking control instruction, the first electronically controlled valve is controlled to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electronically controlled valve are disconnected, so as to cut off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressure reducing solenoid valve is controlled to be energized so that the air outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air of the trailer control valve connected to the second end of the air outlet flows back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

[0010] According to the control method of the electronic parking system of the embodiment of the present invention, the first mechanical valve can be closed by the first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet of the proportional relay valve are connected by the voltage control device. That is, by providing the first electrically controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0011] In addition, the control method of the electronic parking system according to the embodiment of the present invention may also have the following additional technical features: In some examples, controlling the first electrically controlled valve to be energized to disconnect the air inlet and air outlet of the first mechanical valve connected to the first electrically controlled valve includes: controlling the first electrically controlled valve to be energized so that compressed air enters the first mechanical valve connected to the air outlet of the first electrically controlled valve through the air inlet connected to the air inlet of the first electrically controlled valve, so that the first mechanical valve is shut off, thereby disconnecting the air inlet and air outlet of the first mechanical valve.

[0012] In some examples, controlling the pressurization solenoid valve to be energized so that the air inlet and air outlet of the proportional relay valve are connected includes: controlling the pressurization solenoid valve to be energized so that the compressed air from the air inlet connected to the air inlet of the pressurization solenoid valve is filled into the control chamber of the proportional relay valve connected to the air outlet of the pressurization solenoid valve, so that the air inlet and air outlet of the proportional relay valve are connected.

[0013] In some examples, controlling the power supply of the pressure reducing solenoid valve to connect the air outlet end and the exhaust end of the proportional relay valve includes: controlling the power supply of the pressure reducing solenoid valve to release the compressed air in the control chamber of the proportional relay valve connected to the air inlet end of the pressure reducing solenoid valve through the exhaust port connected to the air outlet end of the pressure reducing solenoid valve to connect the air outlet end and the exhaust end of the proportional relay valve.

[0014] In some examples, the parking control instruction also includes a parking brake instruction; when the parking control instruction is the parking brake instruction, the pressure reducing solenoid valve is controlled to be energized, so that the outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air in the trailer brake control valve of the vehicle and the spring brake air chamber of the vehicle connected to the second end of the outlet flow back through the outlet into the proportional relay valve connected to the first end of the outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve to realize the parking brake function.

[0015] In some examples, the parking control instruction also includes a parking brake release instruction; when the parking control instruction is the parking brake release instruction, the pressurizing solenoid valve is controlled to be energized, so that the air inlet and outlet ends of the proportional relay valve are connected, so that the compressed air enters the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the outlet end of the proportional relay valve and the spring brake air chamber of the vehicle, so as to realize the parking brake release function.

[0016] In some examples, the electronic parking system also includes a pressure sensor, and the method further includes: obtaining the air pressure of the air outlet when receiving the trailer independent braking control instruction; adjusting the on-off time of the pressurizing solenoid valve and / or the decompressing solenoid valve according to the air pressure of the air outlet to adjust the output ratio of the proportional relay valve, thereby achieving adjustment of the braking force.

[0017] In some examples, the electronic parking system further includes: a controller connected to the proportional relay valve, and the method further includes: upon receiving an active parking release command, controlling the air inlet and air outlet of the proportional relay valve to be directly connected, so that compressed air enters the trailer brake control valve of the vehicle and the spring brake air chamber of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the outlet end of the proportional relay valve, thereby releasing the parking brake function.

[0018] To achieve the above-mentioned objectives, an embodiment of a second aspect of the present invention provides a control device for an electronic parking system, the electronic parking system comprising: an air inlet, an air outlet, an exhaust port, a pressurizing solenoid valve, a decompressing solenoid valve, a first electrically controlled valve, a first mechanical valve, and a proportional relay valve. The device comprises: a receiving module for receiving a parking control instruction, wherein the parking control instruction comprises a parking brake force detection control instruction or a trailer independent braking control instruction; and a control module for controlling, when the parking control instruction is the parking brake force detection control instruction, to energize the first electrically controlled valve so as to disconnect the air inlet and air outlet of the first mechanical valve connected to the first electrically controlled valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet of the first mechanical valve, and thereby cutting off the air path between the spring brake chamber of the vehicle connected to the second end of the air outlet. At the same time, controlling the pressurizing solenoid valve to energize the air inlet and air outlet of the proportional relay valve, thereby connecting the pressure of the air inlet connected to the air inlet of the proportional relay valve. The compressed air enters the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet end of the proportional relay valve, thereby realizing the parking brake force detection function; or, when the parking control command is the trailer independent brake control command, the first electrically controlled valve is energized to disconnect the air inlet and air outlet ends of the first mechanical valve connected to the first electrically controlled valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the spring brake chamber of the vehicle connected to the second end of the air outlet; at the same time, the pressure reducing solenoid valve is energized to connect the air outlet and exhaust ends of the proportional relay valve, thereby allowing the compressed air in the trailer control valve connected to the second end of the air outlet to flow back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and be released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

[0019] According to the control device of the electronic parking system of the present invention, the first mechanical valve can be closed by the first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected by the voltage control device. That is, by providing the first electrically controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0020] To achieve the above-mentioned purpose, a third embodiment of the present invention discloses a vehicle, which includes: a control device for the electronic parking system according to the second embodiment of the present invention.

[0021] According to the vehicle of the embodiment of the present invention, the first mechanical valve can be closed by the first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected by the voltage control device. That is, by providing the first electrically controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0022] To achieve the above-mentioned objectives, the fourth embodiment of the present invention discloses a computer-readable storage medium, on which a control program based on an electronic parking system is stored. When the control program of the electronic parking system is executed by a processor, the control method of the electronic parking system as described in the first embodiment of the present invention is implemented.

[0023] According to the computer-readable storage medium of an embodiment of the present invention, when the control program of the electronic parking system stored thereon is executed by the processor, the first mechanical valve can be closed by the first electrically-controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected by the voltage control device. That is, by setting the first electrically-controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0024] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 is a schematic structural diagram of an electronic parking system according to an embodiment of the present invention; Figure 2Schematic diagram of a control method for an electronic parking system according to an embodiment of the present invention Figure 3 FIG. 1 is a schematic structural diagram of a control device for an electronic parking system according to an embodiment of the present invention.

[0026] Reference numerals: Electronic parking system 10; air inlet 1; air outlet 2; exhaust port 3; voltage control device 4; first electronically controlled valve 5; first mechanical valve 6; proportional relay valve 7; control device 100 of the electronic parking system; receiving module 110; control module 120. DETAILED DESCRIPTION

[0027] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present invention, the implementation of the embodiments of the present invention is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not intended to limit the embodiments of the present invention. In the following technical description, for the sake of convenience of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices may be simplified for display.

[0028] Reference below Figure 1-Figure 3 A control method and device for an electronic parking system according to an embodiment of the present invention are described.

[0029] First, combine Figure 1 The relevant structure of the electronic parking system 10 involved in the embodiment of the present invention is described.

[0030] like Figure 1 As shown, the electronic parking system 10 includes: an air inlet 1, an air outlet 2, an exhaust port 3, a voltage control device 4, a first electrically controlled valve 5, a first mechanical valve 6, and a proportional relay valve 7, wherein: The air inlet end of the first electrically controlled valve 5 is connected to the air inlet 1, and the air outlet end of the first electrically controlled valve 5 is connected to the air inlet end of the first mechanical valve 6. The first electrically controlled valve 5 allows the compressed air from the air inlet 1 to enter the first mechanical valve 6 to shut off the first mechanical valve 6, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve 6.

[0031] Specifically, in the electronic parking system 10, the air inlet end of the first electrically controlled valve 5 can be connected to the air inlet 1, and the air outlet end of the first electrically controlled valve 5 can be connected to the air inlet end of the first mechanical valve 6 to complete the transmission channel of the compressed air. Furthermore, when the first electrically controlled valve 5 is energized, the air path inside it can be opened. At this time, the compressed air from the air inlet 1 can enter through the air inlet end of the first electrically controlled valve 5 and flow out from the air outlet end and enter the first mechanical valve 6, turning off the first mechanical valve 6, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve 6.

[0032] The outlet end of the first mechanical valve 6 is connected to the first end of the air outlet 2. When the first mechanical valve 6 is closed, the air path between the first mechanical valve 6 and the first end of the air outlet 2 is cut off, thereby cutting off the connecting air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet 2.

[0033] Specifically, the outlet end of the first mechanical valve 6 is connected to the first end of the air outlet 2, and the second end of the air outlet 2 is connected to the spring brake air chamber of the vehicle. When the first mechanical valve 6 is closed, the air path between the first mechanical valve 6 and the first end of the air outlet 2 can be cut off. Since the first end and the second end of the air outlet 2 are connected to each other, the connecting air path between the upstream air path (air inlet 1→first electric-controlled valve 5→first mechanical valve 6, or air inlet 1→proportional relay valve 7) and the spring brake air chamber of the vehicle connected to the second end of the air outlet 2 can be cut off, so that compressed air cannot enter the spring brake air chamber of the vehicle through the air outlet 2.

[0034] The voltage control device 4 is connected to the proportional relay valve 7 and is used to control the opening and closing of the air inlet and air outlet of the proportional relay valve 7 and the opening and closing of the air exhaust and air outlet of the proportional relay valve 7 .

[0035] Specifically, the voltage control device 4 is connected to the proportional relay valve 7 and can control the opening and closing of the air inlet and air outlet of the proportional relay valve 7, as well as the opening and closing of the exhaust and air outlet of the proportional relay valve 7, by adjusting the flow rate and pressure of the compressed air entering the control chamber of the proportional relay valve 7. For example, the voltage control device 4 can precisely control the operation of the proportional relay valve 7 by adjusting parameters such as its magnitude, frequency, or duty cycle, thereby achieving control over the opening and closing of the air inlet and air outlet of the proportional relay valve 7, as well as the opening and closing of the exhaust and air outlet of the proportional relay valve 7.

[0036] The air inlet end of the proportional relay valve 7 is connected to the air inlet 1, and the air outlet end of the proportional relay valve 7 is connected to the first end of the air outlet 2. When the air inlet end and the air outlet end of the proportional relay valve 7 are connected, compressed air enters the trailer brake control valve of the vehicle connected to the second end of the air outlet 2 to realize the parking brake force detection function.

[0037] Specifically, the inlet end of the proportional relay valve 7 is connected to the air inlet 1 to obtain stable compressed air, and the outlet end of the proportional relay valve 7 is connected to the first end of the air outlet 2. When the inlet and outlet ends of the proportional relay valve 7 are connected, the compressed air from the air inlet 1 can enter the vehicle's trailer brake control valve connected to the second end of the air outlet 2, thereby realizing the parking brake force detection function. For example, when the vehicle is parked, the first mechanical valve 6 is closed, severing the air path between the first mechanical valve 6 and the first end of the air outlet 2, thereby severing the air path between the vehicle's spring brake chamber connected to the second end of the air outlet 2. Once compressed air enters the vehicle's trailer brake control valve, the trailer brake can be released. At this time, it can be detected whether the vehicle is slipping. If the vehicle is not slipping, it indicates that the vehicle's parking brake force meets the hill parking requirement. If the vehicle is slipping, it indicates that the vehicle's parking brake force does not meet the hill parking requirement, thereby realizing the parking brake force detection function.

[0038] The exhaust end of the proportional relay valve 7 is connected to the exhaust port 3. When the exhaust end of the proportional relay valve 7 is connected to the air outlet end, the compressed air of the trailer brake control valve connected to the second end of the air outlet 2 is refluxed through the air outlet 2 into the proportional relay valve 7 connected to the first end of the air outlet 2, and is released from the exhaust port 3 connected to the exhaust end of the proportional relay valve 7, thereby realizing the independent braking function of the trailer.

[0039] Specifically, the exhaust end of the proportional relay valve 7 is connected to the exhaust port 3. When the exhaust end of the proportional relay valve 7 is connected to the air outlet end, the compressed air of the trailer brake control valve connected to the second end of the air outlet 2 can flow back into the first end of the air outlet 2 through the second end of the air outlet 2, and then enter the interior of the proportional relay valve 7 through the air outlet end of the proportional relay valve 7. At the same time, the compressed air entering the proportional relay valve 7 flows directly to the exhaust port 3 through the exhaust end, and is finally discharged into the atmosphere. At this time, as the compressed air is quickly discharged, the air pressure inside the trailer brake control valve drops rapidly, thereby realizing the independent braking function of the trailer.

[0040] According to the electronic parking system 10 of the embodiment of the present invention, the first mechanical valve 6 can be closed by the first electrically controlled valve 5 to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve 7 are connected by the voltage control device 4. Alternatively, the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve 7 are connected by the voltage control device 4. That is, by providing the first electrically controlled valve 5, the first mechanical valve 6 and the proportional relay valve 7 and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized. At the same time, the control structure and control process of the electronic parking system 10 are simplified, and the manufacturing cost and maintenance cost of the electronic parking system 10 are reduced.

[0041] In one embodiment of the present invention, the air outlet 2 includes: a first air outlet 2, a second air outlet 2 and a third air outlet 2, wherein one end of the first air outlet 2, the second air outlet 2 and the third air outlet 2 are respectively connected to the spring brake chamber of the vehicle.

[0042] Specifically, the air outlet 2 includes a first air outlet 2, a second air outlet 2, and a third air outlet 2. That is, the air outlet 2 can be subdivided into channels, each of which is independently connected to the vehicle's spring brake chamber, forming a multi-path air distribution structure. For example, the air outlet 2 can be divided into three independent channels (the first, second, and third air outlets 2), each connected to a different spring brake chamber (e.g., corresponding to different axles or brake units of the vehicle). This allows for regional braking (e.g., independent control of the front axle, rear axle, or center axle), improving the flexibility of braking force distribution. Furthermore, if a fault occurs (e.g., a blockage or leak) in one air outlet 2, the other air outlets 2 can still function normally, ensuring that some braking functions remain available, thereby improving the reliability of the electronic parking system 10.

[0043] In one embodiment of the present invention, the air outlet 2 further includes: a fourth air outlet 2 , one end of the fourth air outlet 2 is connected to the air inlet end of the trailer brake control valve of the vehicle.

[0044] Specifically, the air outlet 2 also includes a fourth air outlet 2, one end of the fourth air outlet 2 is connected to the air inlet end of the trailer brake control valve, and a compressed air passage can be formed from the electronic parking system 10 to the trailer brake control valve. The electronic parking system 10 can charge or release compressed air to the trailer brake control valve through the fourth air outlet 2, thereby realizing independent braking of the trailer and release of the trailer braking force.

[0045] In one embodiment of the present invention, the electronic parking system 10 further includes a pressure sensor connected to the air outlet 2 for detecting the air pressure at the air outlet 2 .

[0046] Specifically, the electronic parking system 10 is further provided with a pressure sensor connected to the air outlet 2 for detecting the air pressure at the air outlet 2 to reflect the operating status of the air circuit of the electronic parking system 10. The pressure sensor includes, but is not limited to, a pressure sensor installed at the main pipe of the air outlet 2 (i.e., the confluence point of all air outlets 2).

[0047] In one embodiment of the present invention, the electronic parking system 10 further includes a controller, which is connected to the proportional relay valve 7 and is configured to control the air inlet and air outlet of the proportional relay valve 7 to be directly connected when an active parking release command is received, so that compressed air enters the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet 2 through the first end of the air outlet 2 connected to the air outlet end of the proportional relay valve 7, thereby releasing the parking brake function.

[0048] Specifically, the electronic parking system 10 also includes a controller, which is connected to the proportional relay valve 7. When receiving an active parking release command (for example, the driver actively presses the electronic parking brake release button), the controller can actively send an electrical signal to the proportional relay valve 7 (such as activating the pressurized solenoid valve), drive the valve core inside the proportional relay valve 7 to move, open the passage from the air inlet end to the air outlet end of the proportional relay valve 7, allow compressed air to flow from the air inlet 1 into the proportional relay valve 7, and flow through the air outlet end to the first end of the air outlet 2, so as to enter the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet 2, thereby releasing the parking brake function.

[0049] In one embodiment of the present invention, the electronic parking system 10 further includes a plurality of power supply devices for controlling the on-off current of the voltage control device 4 and the first electrically controlled valve 5 .

[0050] Specifically, the electronic parking system 10 also includes multiple power supply devices, wherein the multiple power supply devices are respectively connected to the voltage control device 4 and the first electronically controlled valve 5, and can realize independent control of the current on and off of the voltage control device 4 and the first electronically controlled valve 5 to realize different functions. For example, the voltage control device 4 and the first electronically controlled valve 5 can be controlled to be energized at the same time to realize the independent braking function of the vehicle's trailer, or the voltage control device 4 can be controlled to be energized and the first electronically controlled valve 5 can be controlled to be de-energized to realize the vehicle's parking brake function or release the parking brake function.

[0051] In one embodiment of the present invention, the voltage control device 4 includes: a pressurizing solenoid valve, the air inlet end of the pressurizing solenoid valve is connected to the air inlet 1, and the air outlet end of the pressurizing solenoid valve is connected to the control chamber of the proportional relay valve 7, which is used to allow compressed air to enter the control chamber of the proportional relay valve 7 so that the air inlet end and the air outlet end of the proportional relay valve 7 are connected.

[0052] Specifically, the voltage control device 4 includes a pressurizing solenoid valve, the air inlet end of the pressurizing solenoid valve is connected to the air inlet 1. After the pressurizing solenoid valve is energized, the compressed air from the air inlet 1 can enter the pressurizing solenoid valve through the air inlet end of the pressurizing solenoid valve, and enter the control chamber of the proportional relay valve 7 through the air outlet end of the pressurizing solenoid valve, so that the air pressure in the control chamber of the proportional relay valve 7 gradually increases, pushing the valve core of the proportional relay valve 7 to move, so that the air inlet end and the air outlet end of the proportional relay valve 7 are connected.

[0053] In one embodiment of the present invention, the voltage control device 4 also includes: a pressure reducing solenoid valve, the air inlet end of the pressure reducing solenoid valve is connected to the control chamber of the proportional relay valve 7, and the air outlet end of the pressure reducing solenoid valve is connected to the exhaust port 3, which is used to release the compressed air in the control chamber of the proportional relay valve 7 from the exhaust port 3 so that the exhaust end and the air outlet end of the proportional relay valve 7 are connected.

[0054] Specifically, the voltage control device 4 also includes a pressure reducing solenoid valve, the air inlet end of the pressure reducing solenoid valve is connected to the control chamber of the proportional relay valve 7, and the air outlet end of the pressure reducing solenoid valve is connected to the exhaust port 3. After the pressure reducing solenoid valve is energized, the compressed air in the control chamber of the proportional relay valve 7 can be released from the exhaust port 3. As the compressed air is discharged from the control chamber of the proportional relay valve 7, the air pressure in the control chamber of the proportional relay valve 7 gradually decreases, the air pressure force weakens, and the valve core of the proportional relay valve 7 is displaced under the action of the spring force or reverse air pressure, thereby connecting the exhaust end and the air outlet end of the proportional relay valve 7.

[0055] In one embodiment of the present invention, when the air inlet and outlet ends of the proportional relay valve 7 are connected, compressed air is allowed to enter the trailer brake control valve of the vehicle connected to the second end of the air outlet 2 and the spring brake air chamber of the vehicle, thereby releasing the parking brake function.

[0056] Specifically, when the inlet and outlet ends of the proportional relay valve 7 are connected, compressed air from the inlet 1 can enter the second end of the outlet 2 through the first end. Since the second end of the outlet 2 is connected to both the vehicle's trailer brake control valve and the spring brake chamber, the compressed air can be divided into two paths and enter the vehicle's trailer brake control valve and the vehicle's spring brake chamber, thereby releasing the parking brake. For example, after the trailer brake control valve receives compressed air, the internal valve core actuates (e.g., pushes a diaphragm or piston), opening the trailer brake's charging path. The compressed air enters the trailer brake's parking control chamber, increasing the pressure in the parking control chamber, pushing the diaphragm or piston, compressing the spring and releasing the trailer brake's clamping force, thereby releasing the trailer brake. Simultaneously, after the spring brake chamber receives compressed air, the internal diaphragm or piston is pushed by the compressed air, compressing the preload spring, thereby releasing the brake's clamping force and releasing the tractor's parking brake.

[0057] In one embodiment of the present invention, when the exhaust end and the air outlet end of the proportional relay valve 7 are connected, the compressed air in the trailer brake control valve of the vehicle and the spring brake air chamber of the vehicle connected to the second end of the air outlet 2 enters the proportional relay valve 7 connected to the first end of the air outlet 2 through the air outlet 2, and is released from the exhaust port 3 connected to the exhaust end of the proportional relay valve 7, thereby releasing the parking brake function.

[0058] Specifically, when the exhaust end and the air outlet end of the proportional relay valve 7 are connected, due to the decrease in the air pressure of the proportional relay valve 7, the compressed air in the trailer brake control valve of the vehicle and the spring brake air chamber of the vehicle connected to the second end of the air outlet 2 will flow back through the air outlet 2 into the proportional relay valve 7 connected to the first end of the air outlet 2, and be released from the exhaust port 3 connected to the exhaust end of the proportional relay valve 7, thereby releasing the parking brake function.

[0059] Figure 2 FIG. 1 is a flow chart of a control method for an electronic parking system according to an embodiment of the present invention, the method comprising the following steps: A parking control instruction is received, where the parking control instruction includes a parking brake force detection control instruction or a trailer independent braking control instruction.

[0060] Specifically, the electronic parking system can receive instructions for controlling the parking brake function, including specific operational objectives (such as detecting braking force or independently controlling trailer braking). The parking control instructions include but are not limited to those from driver operations (such as electronic parking brake buttons, dashboard instructions), vehicle control systems (such as hill assist systems, automatic driving systems) or remote monitoring platforms (such as fleet management systems).

[0061] When the parking control command is a parking brake force detection control command, the first electrically controlled valve is energized to disconnect the air inlet and air outlet of the first mechanical valve connected to the first electrically controlled valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet of the first mechanical valve, thereby cutting off the air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet; at the same time, the pressurizing solenoid valve is energized to connect the air inlet and air outlet of the proportional relay valve, thereby allowing compressed air from the air inlet connected to the air inlet of the proportional relay valve to enter the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet of the proportional relay valve, thereby realizing the parking brake force detection function; Alternatively, when the parking control instruction is a trailer independent braking control instruction, the first electrically controlled valve is controlled to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electrically controlled valve are disconnected, so as to cut off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressure reducing solenoid valve is controlled to be energized so that the air outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air of the trailer control valve connected to the second end of the air outlet flows back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

[0062] Specifically, when it is detected that the parking control instruction is a parking brake force detection control instruction, the first electrically controlled valve can be controlled to be energized to open the air path inside it. At this time, the compressed air from the air inlet can enter through the air inlet end of the first electrically controlled valve and flow out from the air outlet end, entering the first mechanical valve, closing the first mechanical valve, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve, so as to cut off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressurizing solenoid valve can be controlled to be energized to allow the air inlet to The compressed air at the air inlet enters the control chamber of the proportional relay valve through the pressurized solenoid valve, so that the air inlet and air outlet of the proportional relay valve are connected, so that the compressed air at the air inlet connected to the air inlet end of the proportional relay valve enters the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet end of the proportional relay valve, thereby releasing the brakes of the trailer. At this time, it can be detected whether the vehicle is slipping. If the vehicle does not slip at this time, it means that the parking braking force of the vehicle meets the hill parking requirements. If the vehicle slips, it means that the parking braking force of the vehicle does not meet the hill parking requirements, thereby realizing parking braking force detection.

[0063] Furthermore, when it is detected that the parking control instruction is a trailer independent braking control instruction, the first electronically controlled valve can be controlled to be energized to open the air path channel therein. At this time, the compressed air from the air inlet can enter through the air inlet end of the first electronically controlled valve and flow out from the air outlet end, entering the first mechanical valve, closing the first mechanical valve, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressure reducing solenoid valve can be controlled to be energized to discharge the compressed air in the control chamber of the proportional relay valve from the exhaust port, so that the exhaust end of the proportional relay valve is connected to the air outlet end, thereby allowing the compressed air of the trailer control valve connected to the second end of the air outlet to flow back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and be released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

[0064] Therefore, the control method of the above-mentioned electronic parking system can close the first mechanical valve through the first electronically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected through the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected through the voltage control device. That is, by setting the first electronically controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0065] In one embodiment of the present invention, controlling the first electrically controlled valve to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electrically controlled valve are disconnected includes: controlling the first electrically controlled valve to be energized so that compressed air enters the first mechanical valve connected to the air outlet end of the first electrically controlled valve through the air inlet connected to the air inlet end of the first electrically controlled valve, so that the first mechanical valve is shut off, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve.

[0066] Specifically, in the electronic parking system, since the air inlet end of the first electrically controlled valve is connected to the air inlet, and the air outlet end of the first electrically controlled valve is connected to the air inlet end of the first mechanical valve, a compressed air transmission channel is constructed. Therefore, the first electrically controlled valve can be controlled to be energized and its internal air path can be opened. At this time, the compressed air from the air inlet can enter through the air inlet end of the first electrically controlled valve, and flow out from the air outlet end, enter the first mechanical valve, and turn off the first mechanical valve, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve.

[0067] In one embodiment of the present invention, the pressurizing solenoid valve is controlled to be energized so that the air inlet and air outlet of the proportional relay valve are connected, including: controlling the pressurizing solenoid valve to be energized so that the compressed air from the air inlet connected to the air inlet of the pressurizing solenoid valve is filled into the control chamber of the proportional relay valve connected to the air outlet of the pressurizing solenoid valve, so that the air inlet and air outlet of the proportional relay valve are connected.

[0068] Specifically, in the electronic parking system, since the air inlet end of the pressurizing solenoid valve is connected to the air inlet, and the air outlet end of the pressurizing solenoid valve is connected to the control chamber of the proportional relay valve, the pressurizing solenoid valve can be controlled to be energized, so that the compressed air from the air inlet enters the pressurizing solenoid valve through the air inlet end of the pressurizing solenoid valve, and enters the control chamber of the proportional relay valve through the air outlet end of the pressurizing solenoid valve, so that the air pressure in the control chamber of the proportional relay valve gradually increases, pushing the valve core of the proportional relay valve to move, so that the air inlet end and the air outlet end of the proportional relay valve are connected.

[0069] In one embodiment of the present invention, the pressure reducing solenoid valve is controlled to be energized so that the outlet end and the exhaust end of the proportional relay valve are connected, including: controlling the pressure reducing solenoid valve to be energized so that the compressed air in the control chamber of the proportional relay valve connected to the air inlet end of the pressure reducing solenoid valve is released through the exhaust port connected to the outlet end of the pressure reducing solenoid valve, so that the outlet end and the exhaust end of the proportional relay valve are connected.

[0070] Specifically, in the electronic parking system, since the air inlet end of the pressure reducing solenoid valve is connected to the control chamber of the proportional relay valve, and the air outlet end of the pressure reducing solenoid valve is connected to the exhaust port, the pressure reducing solenoid valve can be controlled to be energized, so that the compressed air in the control chamber of the proportional relay valve is released from the exhaust port. As the compressed air is discharged from the control chamber of the proportional relay valve, the air pressure in the control chamber of the proportional relay valve gradually decreases, the air pressure force weakens, and the valve core of the proportional relay valve is displaced under the action of spring force or reverse air pressure, thereby connecting the exhaust end and the air outlet end of the proportional relay valve.

[0071] In one embodiment of the present invention, the parking control instruction also includes a parking brake instruction; when the parking control instruction is a parking brake instruction, the pressure reducing solenoid valve is controlled to be energized, so that the outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air in the trailer brake control valve of the vehicle connected to the second end of the air outlet and the spring brake air chamber of the vehicle flows back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the parking brake function.

[0072] Specifically, the parking control instruction also includes a parking brake instruction. When it is detected that the parking control instruction is a parking brake instruction, the pressure reducing solenoid valve can be controlled to be energized to connect the exhaust end and the air outlet end of the proportional relay valve. At this time, due to the reduction in air pressure of the proportional relay valve, the compressed air in the trailer brake control valve of the vehicle and the spring brake air chamber of the vehicle connected to the second end of the air outlet will flow back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and be released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the release of the parking brake function.

[0073] In one embodiment of the present invention, the parking control instruction also includes a parking brake release instruction; when the parking control instruction is a parking brake release instruction, the pressurizing solenoid valve is controlled to be energized, so that the air inlet and air outlet of the proportional relay valve are connected, so that the compressed air enters the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet end of the proportional relay valve, so as to realize the parking brake release function.

[0074] Specifically, the parking control instruction also includes a parking brake release instruction. When the parking control instruction is a parking brake release instruction, the pressurized solenoid valve can be controlled to be energized to connect the air inlet and the air outlet of the proportional relay valve. At this time, the compressed air in the air inlet can enter the second end of the air outlet through the first end of the air outlet. Since the second end of the air outlet is simultaneously connected to the vehicle's trailer brake control valve and the spring brake air chamber, the compressed air can be divided into two paths to enter the vehicle's trailer brake control valve and the vehicle's spring brake air chamber, thereby realizing the parking brake release function. For example, after the trailer brake control valve receives compressed air, the internal valve core moves (such as pushing the diaphragm or piston), which can open the charging passage of the trailer brake, and the compressed air enters the parking control chamber of the trailer brake. The air pressure in the parking control chamber increases, pushing the diaphragm or piston to compress the spring, releasing the clamping force of the trailer brake, thereby releasing the trailer brake. At the same time, after the spring brake air chamber receives compressed air, the internal diaphragm or piston is pushed by the compressed air, compressing the pre-loaded spring, which can release the clamping force of the brake, thereby releasing the parking brake of the tractor.

[0075] In one embodiment of the present invention, the electronic parking system further includes a pressure sensor, and the method further includes: upon receiving the trailer independent brake control instruction, obtaining the air pressure at the air outlet; The on-off time of the pressurizing solenoid valve and / or the decompressing solenoid valve is adjusted according to the air pressure at the air outlet to adjust the output ratio of the proportional relay valve, thereby achieving the adjustment of the braking force.

[0076] Specifically, the electronic parking system is also equipped with a pressure sensor that can detect the air pressure at the air outlet 2 to reflect the working status of the air circuit of the electronic parking system. The pressure sensor includes but is not limited to a pressure sensor installed at the main pipe of the air outlet (i.e., the confluence point of all air outlets).

[0077] Furthermore, upon receiving a trailer independent brake control command, the current air pressure at the air outlet can be obtained. Based on the current air pressure at the air outlet, the energization time (i.e., duty cycle) of the pressurizing and reducing solenoid valves can be dynamically adjusted to control the output air pressure ratio of the proportional relay valve, thereby adjusting the braking force. For example, when the braking force is low, the energization time of the pressurizing solenoid valve can be increased to allow more compressed air to enter the control chamber of the proportional relay valve, pushing the valve core to move, increasing the conductance between the air inlet and outlet, thereby increasing the air pressure at the air outlet and enhancing the trailer's braking force. Similarly, when the braking force is high, the energization time of the reducing solenoid valve can be increased to accelerate the release of compressed air from the proportional relay valve control chamber, allowing the compressed air to quickly flow back and release from the vehicle's trailer brake control valve, thereby reducing the trailer's braking force.

[0078] In one embodiment of the present invention, the electronic parking system further includes: a controller connected to the proportional relay valve, and the method further includes: when an active parking release command is received, controlling the air inlet and air outlet of the proportional relay valve to be directly connected, so that compressed air enters the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet end of the proportional relay valve, thereby releasing the parking brake function.

[0079] Specifically, the electronic parking system also includes a controller connected to the proportional relay valve, which can directly control the proportional relay valve. For example, when receiving an active parking release command (such as the driver actively pressing the electronic handbrake release button), the controller can actively send an electrical signal to the proportional relay valve (such as activating the pressurized solenoid valve), driving the valve core inside the proportional relay valve to move, opening the passage from the air inlet to the air outlet of the proportional relay valve, allowing compressed air to flow from the air inlet into the proportional relay valve, and flow through the air outlet to the first end of the air outlet, so as to enter the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet, thereby releasing the parking brake function.

[0080] In summary, according to the control method of the electronic parking system of the embodiment of the present invention, the first mechanical valve can be closed by the first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected by the voltage control device. That is, by setting the first electrically controlled valve, the first mechanical valve and the proportional relay valve, and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0081] A further embodiment of the present invention provides a control device for an electronic parking system, such as Figure 3 As shown, the control device 100 of the electronic parking system includes: a receiving module 110 and a control module 120, wherein: The receiving module 110 receives a parking control instruction, where the parking control instruction includes a parking brake force detection control instruction or a trailer independent braking control instruction.

[0082] The control module 120 controls, when the parking control instruction is a parking brake force detection control instruction, to energize the first electrically controlled valve, disconnecting the air inlet and air outlet of the first mechanical valve connected to the first electrically controlled valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet of the first mechanical valve, thereby cutting off the air path between the spring brake chamber of the vehicle connected to the second end of the air outlet, and simultaneously controls the pressurizing solenoid valve to energize, connecting the air inlet and air outlet of the proportional relay valve, thereby allowing compressed air from the air inlet connected to the air inlet of the proportional relay valve to enter the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet of the proportional relay valve, thereby realizing the parking brake force detection function; Alternatively, when the parking control instruction is a trailer independent braking control instruction, the first electrically controlled valve is controlled to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electrically controlled valve are disconnected, so as to cut off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressure reducing solenoid valve is controlled to be energized so that the air outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air of the trailer control valve connected to the second end of the air outlet flows back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

[0083] In some embodiments, when controlling the first electrically controlled valve to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electrically controlled valve are disconnected, the control module 120 is specifically used to: control the first electrically controlled valve to be energized so that compressed air enters the first mechanical valve connected to the air outlet end of the first electrically controlled valve through the air inlet connected to the air inlet end of the first electrically controlled valve, so that the first mechanical valve is shut off, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve.

[0084] In some embodiments, when controlling the pressurization solenoid valve to be energized so that the air inlet and air outlet of the proportional relay valve are connected, the control module 120 is specifically used to: control the pressurization solenoid valve to be energized so that the compressed air from the air inlet connected to the air inlet of the pressurization solenoid valve is filled into the control chamber of the proportional relay valve connected to the air outlet of the pressurization solenoid valve, so that the air inlet and air outlet of the proportional relay valve are connected.

[0085] In some embodiments, when the pressure reducing solenoid valve is controlled to be energized so that the outlet end and the exhaust end of the proportional relay valve are connected, the control module 120 is specifically used to: control the pressure reducing solenoid valve to be energized so that the compressed air in the control chamber of the proportional relay valve connected to the air inlet end of the pressure reducing solenoid valve is released through the exhaust port connected to the outlet end of the pressure reducing solenoid valve, so that the outlet end and the exhaust end of the proportional relay valve are connected.

[0086] In some embodiments, the parking control instruction also includes a parking brake instruction; when the parking control instruction is a parking brake instruction, the control module 120 is also used to: control the power supply of the pressure reducing solenoid valve to connect the outlet end and the exhaust end of the proportional relay valve, so that the compressed air of the trailer brake control valve of the vehicle connected to the second end of the outlet and the spring brake air chamber of the vehicle are refluxed through the outlet into the proportional relay valve connected to the first end of the outlet, and released from the exhaust port connected to the exhaust end of the proportional relay valve to realize the parking brake function.

[0087] In some embodiments, the parking control instruction also includes a parking brake release instruction; when the parking control instruction is a parking brake release instruction, the control module 120 is also used to: control the pressurization solenoid valve to be energized, so that the air inlet and outlet ends of the proportional relay valve are connected, so that the compressed air enters the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet end of the proportional relay valve, so as to realize the parking brake release function.

[0088] In some embodiments, the electronic parking system also includes a pressure sensor, and the control module 120 is also used to: obtain the air pressure at the air outlet when receiving the trailer independent braking control command; adjust the on-off time of the pressurizing solenoid valve and / or the decompressing solenoid valve according to the air pressure at the air outlet to adjust the output ratio of the proportional relay valve, thereby achieving the adjustment of the braking force.

[0089] In some embodiments, the electronic parking system further includes: a controller connected to the proportional relay valve, and the control module 120 is further configured to: upon receiving an active parking release command, control the air inlet and air outlet of the proportional relay valve to be directly connected, so that compressed air enters the vehicle's trailer brake control valve and the vehicle's spring brake air chamber connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet of the proportional relay valve, thereby releasing the parking brake function. According to the control device 100 of the electronic parking system of the present invention, the first mechanical valve can be closed by the first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet of the proportional relay valve are connected by the voltage control device. That is, by providing the first electrically controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0090] To achieve the above-mentioned purpose, a third embodiment of the present invention discloses a vehicle, which includes: a control device for an electronic parking system according to the second embodiment of the present invention.

[0091] According to the vehicle of the embodiment of the present invention, the first mechanical valve can be closed by the first electrically controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected by the voltage control device. That is, by providing the first electrically controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0092] To achieve the above-mentioned objectives, an embodiment of the fourth aspect of the present invention discloses a computer-readable storage medium, on which a control program based on an electronic parking system is stored. When the control program of the electronic parking system is executed by a processor, a control method of the electronic parking system as in the embodiment of the first aspect of the present invention is implemented.

[0093] According to the computer-readable storage medium of an embodiment of the present invention, when the control program of the electronic parking system stored thereon is executed by the processor, the first mechanical valve can be closed by the first electrically-controlled valve to cut off the connecting air path for compressed air to enter the spring brake air chamber of the vehicle. Furthermore, the parking brake force detection function can be realized when the air inlet and air outlet ends of the proportional relay valve are connected by the voltage control device, or the trailer independent braking function can be realized when the exhaust and air outlet ends of the proportional relay valve are connected by the voltage control device. That is, by setting the first electrically-controlled valve, the first mechanical valve and the proportional relay valve and coordinating and controlling them, the parking brake force detection function and the trailer independent braking function can be realized, and the control structure and control process of the electronic parking system adopted by the present invention are simple, which can reduce the manufacturing cost and maintenance cost of the electronic parking system.

[0094] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0095] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A control method for an electronic parking system, characterized in that: The electronic parking system includes: an air inlet, an air outlet, an exhaust port, a pressurizing solenoid valve, a pressure reducing solenoid valve, a first electrically controlled valve, a first mechanical valve, and a proportional relay valve. The method includes the following steps: receiving a parking control instruction, wherein the parking control instruction includes a parking brake force detection control instruction or a trailer independent braking control instruction; When the parking control instruction is the parking brake force detection control instruction, the first electrically controlled valve is energized to disconnect the air inlet and air outlet of the first mechanical valve connected to the first electrically controlled valve, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet of the first mechanical valve, thereby cutting off the air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet; at the same time, the pressurizing solenoid valve is energized to connect the air inlet and air outlet of the proportional relay valve, thereby allowing compressed air from the air inlet connected to the air inlet of the proportional relay valve to enter the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet of the proportional relay valve, thereby realizing the parking brake force detection function; Alternatively, when the parking control instruction is the trailer independent braking control instruction, the first electronically controlled valve is controlled to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electronically controlled valve are disconnected, so as to cut off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressure reducing solenoid valve is controlled to be energized so that the air outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air of the trailer control valve connected to the second end of the air outlet flows back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

2. The control method of the electronic parking system according to claim 1, characterized in that: The controlling the first electrically controlled valve to be energized so as to disconnect the air inlet end and the air outlet end of the first mechanical valve connected to the first electrically controlled valve, comprises: Control the first electrically controlled valve to be energized so that compressed air enters the first mechanical valve connected to the air outlet end of the first electrically controlled valve through the air inlet connected to the air inlet end of the first electrically controlled valve, so that the first mechanical valve is closed, thereby disconnecting the air inlet end and the air outlet end of the first mechanical valve.

3. The control method of the electronic parking system according to claim 1, characterized in that: The controlling the pressurizing solenoid valve to be energized so that the air inlet and the air outlet of the proportional relay valve are connected includes: The pressurizing solenoid valve is controlled to be energized so that the compressed air from the air inlet connected to the air inlet end of the pressurizing solenoid valve is filled into the control chamber of the proportional relay valve connected to the air outlet end of the pressurizing solenoid valve, so that the air inlet end and the air outlet end of the proportional relay valve are connected.

4. The control method of the electronic parking system according to claim 1, characterized in that: The controlling the power supply of the pressure reducing solenoid valve to connect the gas outlet end and the exhaust end of the proportional relay valve comprises: The pressure reducing solenoid valve is controlled to be energized so that the compressed air in the control chamber of the proportional relay valve connected to the air inlet end of the pressure reducing solenoid valve is released through the exhaust port connected to the air outlet end of the pressure reducing solenoid valve, so that the air outlet end and the exhaust end of the proportional relay valve are connected.

5. The control method of the electronic parking system according to claim 1, characterized in that: The parking control instruction also includes a parking brake instruction; When the parking control instruction is the parking brake instruction, the pressure reducing solenoid valve is controlled to be energized, so that the air outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air in the trailer brake control valve of the vehicle and the spring brake air chamber of the vehicle connected to the second end of the air outlet are returned through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the parking brake function.

6. The control method of the electronic parking system according to claim 1, characterized in that: The parking control instruction also includes a parking brake release instruction; When the parking control instruction is the parking brake release instruction, the pressurizing solenoid valve is controlled to be energized, so that the air inlet and outlet ends of the proportional relay valve are connected, so that the compressed air enters the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the outlet end of the proportional relay valve and the spring brake air chamber of the vehicle, so as to realize the parking brake release function.

7. The control method of the electronic parking system according to claim 1, characterized in that: The electronic parking system further includes a pressure sensor, and the method further includes: Upon receiving the trailer independent brake control instruction, obtaining the air pressure at the air outlet; The on-off time of the pressurizing solenoid valve and / or the decompressing solenoid valve is adjusted according to the air pressure at the air outlet to adjust the output ratio of the proportional relay valve, thereby achieving regulation of the braking force.

8. The control method of the electronic parking system according to claim 1, characterized in that: The electronic parking system further includes: a controller connected to the proportional relay valve, and the method further includes: When an active parking release command is received, the air inlet and outlet ends of the proportional relay valve are controlled to be directly connected, so that compressed air enters the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the outlet end of the proportional relay valve and the spring brake air chamber of the vehicle, thereby releasing the parking brake function.

9. A control device for an electronic parking system, the electronic parking system comprising: An air inlet, an air outlet, an exhaust port, a pressurizing solenoid valve, a pressure reducing solenoid valve, a first electrically controlled valve, a first mechanical valve, and a proportional relay valve. The device includes: A receiving module receives a parking control instruction, wherein the parking control instruction includes a parking brake force detection control instruction or a trailer independent braking control instruction; a control module, when the parking control instruction is the parking brake force detection control instruction, controlling the first electrically controlled valve to be energized, so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electrically controlled valve are disconnected, thereby cutting off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the spring brake air chamber of the vehicle connected to the second end of the air outlet; and simultaneously controlling the pressurizing solenoid valve to be energized, so that the air inlet end and the air outlet end of the proportional relay valve are connected, thereby allowing compressed air from the air inlet connected to the air inlet end of the proportional relay valve to enter the trailer brake control valve of the vehicle connected to the second end of the air outlet through the first end of the air outlet connected to the air outlet end of the proportional relay valve, thereby realizing the parking brake force detection function; Alternatively, when the parking control instruction is the trailer independent braking control instruction, the first electronically controlled valve is controlled to be energized so that the air inlet end and the air outlet end of the first mechanical valve connected to the first electronically controlled valve are disconnected, so as to cut off the air path between the first mechanical valve and the first end of the air outlet connected to the air outlet end of the first mechanical valve, thereby cutting off the air path between the first mechanical valve and the spring brake air chamber of the vehicle connected to the second end of the air outlet. At the same time, the pressure reducing solenoid valve is controlled to be energized so that the air outlet end and the exhaust end of the proportional relay valve are connected, so that the compressed air of the trailer control valve connected to the second end of the air outlet flows back through the air outlet into the proportional relay valve connected to the first end of the air outlet, and is released from the exhaust port connected to the exhaust end of the proportional relay valve, thereby realizing the trailer independent braking function.

10. A vehicle, characterized in that: include: The control device for the electronic parking system as claimed in claim 9.

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