Hydraulic retarder integrated proportional control valve assembly

Abstract

The invention provides an integrated proportional control valve assembly of a hydraulic retarder. The integrated proportional control valve assembly is used for solving the technical problems that according to an existing hydraulic retarder arranged in a split mode, the torque control precision is poor, the number of fault risk points is large, and the space of a cab is occupied due to the fact that the number of connecting wire harnesses is large. According to the integrated proportional control valve assembly, the controller is electrically connected with the electromagnet through the proportional valve connector provided with the pin connector, meanwhile, the integrated proportional control valve assembly is matched with an onboard pressure sensor on the lower surface of the controller, an air source air inlet in the valve body and the like in an avoiding design mode, one-to-one installation with the hydraulic retarder is achieved, and the integrated proportional control valve assembly is convenient to install and maintain. Therefore, the torque control precision of the hydraulic retarder is greatly improved; meanwhile, the proportional valve connector is used for replacing a wiring harness and an injection molding connector, the system problem caused by wiring harness failure is avoided, meanwhile, the hidden danger that dust, impurities and water vapor enter the system due to injection molding connector failure is avoided, and the operation cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to a hydraulic retarder, and in particular to an integrated proportional control valve assembly of a hydraulic retarder. Background Art

[0002] The hydraulic retarder is an integrated product that integrates mechanical, electrical, gas and liquid. It is mainly composed of the hydraulic retarder mechanical assembly, controller (pressure control module), control valve (pneumatic actuator module), wiring harness, operating handle, sensor, etc. The current technical route of the retarder product is to arrange the controller and the mechanical assembly separately. The controller is installed in the cab of the whole vehicle. The control valve and sensor are installed together on the retarder mechanical assembly and assembled at the rear end of the gearbox. Then, the control signals of the whole vehicle handle, VCU, etc. are sent to the control valve through multiple wiring harnesses for pressure control. However, this split layout scheme has the disadvantages of low control accuracy, complex layout, and occupation of cab space. First, since the controller program is not one-to-one corresponding to the mechanical body, the accuracy of the control torque is poor, which cannot meet the high-precision torque control of the whole vehicle. Secondly, there are many connecting harnesses in this scheme, from the sensor to the control valve, the control valve to the controller, and the controller to the whole vehicle. The more connection points, the more fault risk points. Finally, as the vehicle becomes more and more intelligent and automated, there are more and more control components in the vehicle cab. The existing split-type hydraulic retarder can no longer meet the needs of the vehicle. The industry has clearly proposed the need to move the hydraulic retarder controller out of the cab. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems of the existing split-arrangement hydraulic retarder, such as poor control torque accuracy, many connection harnesses leading to many risk points of failure and occupied cab space, and to provide a hydraulic retarder integrated proportional control valve assembly.

[0004] In order to achieve the above purpose, the technical solution provided by the present invention is as follows:

[0005] A hydraulic retarder integrated proportional control valve assembly, comprising a proportional valve module and a controller; the proportional valve module comprises a valve body, an electromagnet arranged in the valve body, a pressure regulating module and an intake air path; the pressure regulating module comprises a proportional valve spool, a spool spring, a connecting valve and a quick exhaust valve; a spool installation cavity is arranged in the valve body, and the proportional valve spool and the spool spring are coaxially installed in the spool installation cavity in sequence from the inside to the outside; a first cavity connected to an external hydraulic retarder cavity is opened at one end of the valve body close to the vehicle frame, and the quick exhaust valve is arranged in the first cavity; the connecting valve is arranged at a position connected to the spool installation cavity in the first cavity; the electromagnet is coaxially arranged on the left side of the proportional valve spool; the special feature is that it also comprises a cover body installed at the upper end of the valve body; the internal space between the cover body and the valve body forms an installation chamber; the controller is arranged in the installation chamber and is fixedly connected to the valve body;

[0006] A proportional valve connector is provided on the valve body at a position corresponding to the electromagnet; pin interfaces are provided at both the upper and lower ends of the proportional valve connector, the pin interface at the upper end is used to be electrically connected to the controller, and the pin interface at the lower end is electrically connected to the electromagnet; both pin interfaces are made of conductive material and are electrically connected; the proportional valve connector is sealed to the valve body;

[0007] An air source air inlet is provided at the upper end of the valve body near one side of the quick exhaust valve; one end of the air inlet path is connected to the air source air inlet, and the other end extends to the position of the proportional valve core and is connected to the valve core air inlet;

[0008] A pressure relief exhaust passage is provided in the valve body, one end of the pressure relief exhaust passage is communicated with the space between the electromagnet and the proportional valve core, and the other end is communicated with the exhaust passage of the quick exhaust valve;

[0009] A third cavity is axially arranged on the valve body of the quick exhaust valve, a safety valve is installed in the third cavity, one end of the third cavity is connected to the first cavity, and the other end is connected to the exhaust channel arranged on the quick exhaust valve; the opening preset pressure value of the safety valve is equal to the preset safety pressure value of the first cavity;

[0010] An onboard pressure sensor is disposed on the lower surface of the controller; an air inlet hole connected to the first cavity is opened at a position corresponding to the onboard pressure sensor on the upper surface of the valve body, and a sensitive element of the onboard pressure sensor extends into the first cavity through the air inlet hole.

[0011] Furthermore, the upper surface of the controller is provided with a first sealing fixing seat and a second sealing fixing seat of a pin structure;

[0012] A first external interface protruding upward is provided at a position on the cover body corresponding to the first sealing fixing seat, and a second external interface protruding upward is provided at a position on the cover body corresponding to the second sealing fixing seat, which are used to connect to the oil and water temperature sensor wiring harness on the retarder and the vehicle end respectively.

[0013] Furthermore, a pin is provided at one end of the lower surface of the controller away from the onboard pressure sensor, and a pin hole is provided at a position of the valve body corresponding to the pin; the pin and the pin hole cooperate to achieve a fixed connection.

[0014] Furthermore, the air source inlet is a VOSS quick-plug interface.

[0015] Furthermore, the cover body is made of injection-molded material, and is sealed with the valve body via a special-shaped rubber seal ring.

[0016] Furthermore, the proportional valve connector and the valve body are sealed by a special-shaped rubber sealing ring.

[0017] Furthermore, the connecting valve is made of rubber.

[0018] Furthermore, a vent plug is provided on the cover body.

[0019] Furthermore, the controller is fixedly connected to the valve body by a plurality of screws;

[0020] The cover body is fixedly connected to the valve body by a plurality of screws.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. A hydraulic retarder integrated proportional control valve assembly provided by the present invention realizes electrical connection between the controller and the electromagnet by means of a proportional valve connector provided with a pin interface, and at the same time cooperates with avoidance designs such as an onboard pressure sensor on the lower surface of the controller and an air source inlet on the valve body, so that the controller is integrated on the valve body and then integrally installed on the hydraulic retarder, realizing a one-to-one installation with the hydraulic retarder, and the characteristic curve of the hydraulic retarder can be calibrated in the controller one-to-one, so that the torque control of each hydraulic retarder is based on its own characteristics, thereby greatly improving the torque control accuracy of the hydraulic retarder; at the same time, the present invention uses a proportional valve connector instead of a wiring harness and an injection molding connector, which not only avoids system problems caused by wiring harness failure, but also avoids hidden dangers such as dust impurities and water vapor entering the system caused by injection molding connector failure, thereby effectively reducing operating costs.

[0023] 2. A hydraulic retarder integrated proportional control valve assembly provided by the present invention provides a pressure relief exhaust channel connected to the exhaust channel of the quick exhaust valve, so that the excess gas generated between the electromagnet and the proportional valve core is led out to the exhaust channel of the quick exhaust valve through the pressure relief exhaust channel, and is discharged out of the valve body together with the gas to be discharged in the exhaust channel of the quick exhaust valve, thereby effectively avoiding the risk of rust inside the system caused by the backflow of water vapor.

[0024] 3. Compared with the existing controller and proportional valve which are connected to transmit signals through a very long wiring harness of the whole vehicle, the present invention designs a proportional valve connector with a pin interface on the valve body, and designs an adaptive plug-in structure on the controller, which is equivalent to the solenoid valve execution module being directly plugged into the controller as a board-end device, reducing the risk of failure points caused by the wiring harness connection, and making the communication between the solenoid valve and the controller more stable and reliable.

[0025] 4. Compared with the existing hydraulic retarder, which installs the pressure sensor externally on the top of the retarder housing to monitor the control air pressure, resulting in the pressure sensor being easily damaged by bumps and requiring a wiring harness to be connected to the controller, the present invention integrates the onboard pressure sensor on the controller through a unique airway design, so that the onboard pressure sensor is in an internal environment, which can realize accurate monitoring of the hydraulic retarder oil pool pressure, improve the reliability of monitoring, and greatly reduce the wiring harness cost.

[0026] 5. Compared with the existing proportional control valve, which can only arrange the air inlet at the front end of the proportional valve core, so that it is far away from the vehicle frame, the vehicle vibrates with a large amplitude during driving, resulting in a high degree of system failure. The present invention places the upper end of the air inlet body close to one side of the quick exhaust valve, which meets the requirement of seamless connection with the controller, and the air inlet is closer to the frame, which not only effectively solves the failure problem of the system, but also makes the system respond more quickly and the control more precise, and at the same time facilitates the arrangement of the wiring harness on the vehicle end.

[0027] 6. The integrated structure of the electromagnet, proportional valve core and quick exhaust valve of the present invention share a valve body, which can leave more redundant space for the arrangement of the external controller, and is more convenient to assemble and lighter in product weight.

[0028] 7. Compared with the traditional independent design of safety valve and quick exhaust valve, the present invention integrates the safety valve on the quick exhaust valve, and realizes module integration under the premise of ensuring the functions of quick exhaust and overpressure prevention. It is small in size and easy to install. At the same time, the quick exhaust valve of this structure can be assembled together with the electromagnet, proportional valve core, etc. from a single direction.

[0029] 8. Compared with the conventional solution of directly welding the pins connected to the outside on the controller circuit board, the present invention arranges the first sealing fixing seat and the second sealing fixing seat of the pin structure on the upper surface of the controller, and arranges the first external interface and the second external interface which protrude upward on the cover body. This structure has the following three advantages on the basis of realizing the connection between the controller and the retarder and the whole vehicle end: it realizes the installation and positioning function of the controller and the cover body; it reduces the welding difficulty of the controller, improves the verticality of the pins, and avoids the difficulty of aligning multiple pins and holes at the same time during installation; compared with the existing connectors with integrated pins and interfaces, this split-coordinated integrated structure occupies less space, can make more space for the controller, and is more suitable for use on structures with limited space.

[0030] 9. The onboard pressure sensor of the present invention is positioned at one point when it is extended into the air inlet hole. At the same time, a pin is arranged on the lower surface of the controller, and a pin hole is opened at the position of the valve body corresponding to the pin. The pin and the pin hole cooperate to achieve another positioning. On the basis of the connection between the controller and the valve body, the reliability of assembly and plug-in of the proportional valve connector is improved through the positioning and guiding of the two parts, and the accuracy of assembly of the proportional valve connector and the plug-in structure on the controller is ensured; in addition, the position of the controller connecting bolts and the housing fixing holes and the processability of the bolt assembly are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a hydraulic retarder integrated proportional control valve assembly of the present invention;

[0032] Figure 2 An exploded view of an embodiment of the present invention;

[0033] Figure 3 A longitudinal cross-sectional view of a proportional valve module along the electromagnet and the proportional valve core in an embodiment of the present invention;

[0034] Figure 4 A longitudinal cross-sectional view of a proportional valve module along a proportional valve connector in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection between the controller and the valve body in an embodiment of the present invention;

[0036] Figure 6 A longitudinal cross-sectional view of a proportional valve module along an air intake path in an embodiment of the present invention;

[0037] Figure 7 Schematic diagram of the bottom of the proportional valve module in the embodiment of the present invention.

[0038] The specific reference numerals are as follows:

[0039] 1-valve body; 2-electromagnet; 3-proportional valve core; 4-valve core spring; 5-connecting valve; 6-quick exhaust valve; 7-safety valve; 8-first cavity; 9-second cavity; 10-proportional valve connector; 11-air source air inlet; 12-air inlet air path; 13-valve core air inlet; 14-pressure relief exhaust channel; 15-exhaust channel; 16-air inlet hole; 17-controller; 18-cover; 19-onboard pressure sensor; 21-first sealing fixing seat; 22-second sealing fixing seat; 23-first external interface; 24-second external interface; 25-pin shaft; 26-insertion structure; 27-vent plug. DETAILED DESCRIPTION

[0040] In order to make the advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 , Figure 2 As shown, a hydraulic retarder integrated proportional control valve assembly includes a proportional valve module, a controller 17 and a cover body 18. The cover body 18 is an injection molding material, which is evenly fixed on the upper end of the valve body 1 by a plurality of screws. The internal space between the cover body 18 and the valve body 1 forms an installation chamber, and the controller 17 is a special-shaped structure, which is arranged in the installation chamber and fixed on the upper end of the valve body 1 by a plurality of screws, which can play a good protective role for the controller 17. At the same time, the cover body 18 and the valve body 1 are sealed by a special-shaped rubber seal ring, and a breathable plug 27 is designed above the cover body 18 to improve the protection capability of the controller 17.

[0042] like Figure 3 As shown, the proportional valve module includes a valve body 1, an electromagnet 2 arranged in the valve body 1, a pressure regulating module and an air intake path 12. The pressure regulating module includes a proportional valve core 3, a valve core spring 4, a connecting valve 5 and a quick exhaust valve 6.

[0043] The proportional valve core 3 is the core functional component of the entire proportional control valve. A valve core installation cavity is provided in the valve body 1. The proportional valve core 3 and the valve core spring 4 are coaxially installed in the valve core installation cavity from the inside to the outside.

[0044] A first cavity 8 is provided at one end of the valve body 1 close to the vehicle frame, and a quick exhaust valve 6 is arranged in the first cavity 8. An air inlet 16 connected to the external hydraulic retarder cavity is provided on the side wall of the valve body 1 at a position corresponding to the first cavity 8, so that gas can flow between the first cavity 8 and the hydraulic retarder cavity through the connecting air hole 16. A connecting valve 5 is coaxially arranged at a position of the connecting valve core installation cavity in the first cavity 8, so that a second cavity 9 is formed between the proportional valve core 3 and the connecting valve 5.

[0045] like Figure 4As shown, the electromagnet 2 is coaxially arranged on the left side of the proportional valve core 3, and a proportional valve connector 10 is arranged at the position of the upper end of the valve body 1 corresponding to the electromagnet 2, and a plug-in structure 26 is arranged on the lower surface of the controller 17. In the present invention, pin interfaces are arranged at both ends of the proportional valve connector 10, and the pin interface at the upper end is used to cooperate with the plug-in structure 26 to achieve electrical connection, and the pin interface at the lower end is electrically connected to the electromagnet 2. The pin interfaces at the upper and lower ends of the proportional valve connector 10 are both made of conductive materials, and the two pin interfaces are electrically connected. Compared with the existing original controller and the proportional valve that are connected and transmit signals through a very long wiring harness of the whole vehicle, the present invention sets the proportional valve connector 10 as a pin-type structure, and can directly realize the electrical connection between the controller 17 and the electromagnet 2 through the pin interfaces at the upper and lower ends of the proportional valve connector 10, reducing the risk of failure caused by the wiring harness connection, and can also strengthen the fixed connection between the valve body 1 and the controller 17. At the same time, the position where the proportional valve connector 10 is connected to the valve body 1 is sealed with a rubber sealing ring, which fully ensures the air tightness between the controller chamber and the chamber where the electromagnet 2 is located while achieving conductivity.

[0046] like Figure 5 As shown, the lower surface of the controller 17 is also provided with an onboard pressure sensor 19, and an air inlet 16 connected to the first cavity is provided at the position of the onboard pressure sensor 19 on the upper surface of the valve body 1. The sensitive element of the onboard pressure sensor 19 extends into the first cavity through the air inlet 16, and is radially sealed by an O-ring to achieve isolation and sealing of the first cavity and the controller chamber. Compared with the existing design of external sensors, the onboard pressure sensor 19 is placed in an internal environment, which can realize accurate monitoring of the hydraulic retarder oil pool pressure, improve the reliability of monitoring and greatly reduce the cost of wiring harnesses.

[0047] In addition, a pin shaft 25 is provided at one end of the lower surface of the controller 17 away from the onboard pressure sensor 19, and a pin hole is opened on the valve body 1 at a position corresponding to the pin shaft 25. The pin shaft 25 and the pin hole cooperate to achieve one positioning; the onboard pressure sensor 19 cooperates with the air inlet hole 16 to achieve another positioning; the controller 17 and the valve body 1 are positioned and guided by a fixed connection at two locations, so as to achieve accurate installation of the proportional valve connector 10 and the plug-in structure 26 on the controller 17.

[0048] In view of the need to interface with an external control system, the present invention reconstructs the air inlet path 12 of the valve body 1 according to the principle of reasonable space avoidance. Figure 6As shown, the air source air inlet 11 is arranged on the upper end of the valve body 1 near the quick exhaust valve 6, so that it is closer to the frame and convenient for the wiring harness layout of the whole vehicle. One end of the air intake path 12 is connected to the air source air inlet 11, and the other end extends to the position of the proportional valve spool 3 and is connected to the spool air inlet 13. In order to improve the adaptability of the product, the air source air inlet 11 is designed to be compatible with a variety of commonly used interfaces of the host. In this embodiment, it is preferably designed as a VOSS quick-plug interface to facilitate rapid docking with the external structure.

[0049] During operation, some gas will be generated in the space between the electromagnet 2 and the proportional valve core 3. In order to discharge the gas outside the valve body 1, the existing proportional regulating control valve will directly open a pressure relief vent from the space between the electromagnet 2 and the proportional valve core 3 to the outside of the valve body 1, and discharge the gas directly outside the valve body 1 through the pressure relief vent. However, when the vehicle is driving, it is easy for water vapor to flow back through the pressure relief vent, which may cause risks such as rust inside the system. In order to solve this problem, Figure 7 As shown, the present invention is provided with a pressure relief exhaust channel 14 in the valve body 1, one end of the pressure relief exhaust channel 14 is connected to the space between the electromagnet 2 and the proportional valve core 3, and the other end is connected to the exhaust channel 15 of the quick exhaust valve 6. The residual gas between the proportional valve core 3 and the electromagnet 2 can be led out to the exhaust channel 15 of the quick exhaust valve 6 through the pressure relief exhaust channel 14, and discharged out of the valve body 1 together with the gas to be discharged in the exhaust channel 15 of the quick exhaust valve 6.

[0050] A third cavity is axially arranged on the valve body of the quick exhaust valve 6, and a safety valve 7 is installed in the third cavity. At the same time, one end of the third cavity is connected to the first cavity 8, and the other end is connected to the exhaust channel 15 of the quick exhaust valve 6, so that the whole system can be quickly exhausted. The preset opening pressure value of the safety valve 7 is equal to the preset safety pressure value of the first cavity 8. When the system air pressure is unbalanced, the excess gas can be quickly discharged from the valve body 1 through the safety valve 7 to restore the system to balance. At the same time, the safety valve 7 is integrated into the quick exhaust valve 6 in the present invention. Compared with the independent design of the traditional safety valve 7 and the quick exhaust valve 6, the integrated structure can leave more redundant space for the arrangement of other parts of the whole system. The quick exhaust valve 6 designed by the present invention removes excess materials, so that the proportional valve spool 3, the connecting valve 5, and the pressure regulating module can be assembled together from a single direction, which is more convenient to assemble and the product weight is lighter.

[0051] The upper surface of the controller 17 is provided with a first sealing fixing seat 21 and a second sealing fixing seat 22 of a pin structure, and a first external interface 23 protruding upward is provided at a position corresponding to the first sealing fixing seat 21 on the cover body 18, and a second external interface 24 protruding upward is provided at a position corresponding to the second sealing fixing seat 22 on the cover body 18. The first sealing fixing seat 21 cooperates with the first external interface 23 to form an external electrical control interface of the controller, which is used to realize the communication between the controller 17 and the oil and water temperature sensor on the retarder, and the second sealing fixing seat 22 cooperates with the second external interface 24 to form an external electrical control interface of the controller, which is used to realize the communication between the controller 17 and the vehicle end. At the same time, the first sealing fixing seat 21 cooperates with the first external interface 23, and the second sealing fixing seat 22 cooperates with the second external interface 24 to realize the positioning and guiding between the cover body 18 and the controller 17. Preferably, the above two external electrical control interfaces of the controller are integrated with the air source inlet 11 in a corner, which is convenient for the circuit board design of the controller 17 and the external connection arrangement of the integrated proportional control valve assembly and the vehicle.

[0052] The specific working process of the hydraulic retarder integrated proportional control valve assembly of the present invention is as follows:

[0053] Intake process: When the integrated proportional control valve needs to intervene in the work, the controller 17 transmits the electrical signal to the electromagnet 2 through the proportional valve connector 10. The electromagnet 2 is energized and stressed. The push rod of the electromagnet 2 overcomes the force of the valve core spring 4, and squeezes the proportional valve core 3 to the right, so that the vehicle's air source (the gas in the intake air path 12) enters the proportional valve core 3 through the valve core inlet 13, and then flows to the second cavity 9; at the same time, the connecting valve 5 is pushed to the right under the pressure difference between the second cavity 9 and the first cavity 8. At this time, the exhaust channel 15 of the quick exhaust valve 6 is blocked, and the gas enters the first cavity 8 through the gap between the connecting valve 5 and the side wall of the first cavity 8, and then enters the hydraulic retarder cavity through the air inlet 16.

[0054] Exhaust process: the current output by the controller 17 gradually decreases, the force balance of the electromagnet 2 is broken, the pressure on the left side of the connecting valve 5 is less than the pressure in the hydraulic retarder cavity, and the connecting valve 5 moves to the left. At this time, the gas entering the hydraulic retarder cavity through the air inlet 16 follows the gap between the connecting valve 5 and the quick exhaust valve 6 and is discharged through the exhaust channel 15 of the quick exhaust valve 6; at the same time, the residual gas between the proportional valve spool 3 and the electromagnet 2 is connected to the exhaust channel 15 of the quick exhaust valve 6 through the pressure relief exhaust channel 14 to discharge excess gas.

[0055] Pressure protection: When the intake pressure of the integrated proportional control valve exceeds the safety pressure set by the safety valve 7, the safety valve 7 is pushed to the right to discharge the excess pressure. When the pressure returns to normal, the safety valve 7 is reset under the action of the spring force, and the entire proportional control valve returns to normal.

[0056] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. For ordinary professional and technical personnel in the field, the specific technical solution recorded in the above embodiment can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution protected by the present invention.

Claims

1. A hydraulic retarder integrated proportional control valve assembly, comprising a proportional valve module and a controller (17); the proportional valve module comprises a valve body (1), an electromagnet (2) arranged in the valve body (1), a pressure regulating module and an intake air path (12); the pressure regulating module comprises a proportional valve spool (3), a spool spring (4), a connecting valve (5) and a quick exhaust valve (6); a spool installation cavity is arranged in the valve body (1), and the proportional valve spool (3) and the spool spring (4) are coaxially installed in the spool installation cavity in sequence from the inside to the outside; a first cavity (8) connected to an external hydraulic retarder cavity is opened at one end of the valve body (1) close to the vehicle frame, and the quick exhaust valve (6) is arranged in the first cavity (8); the connecting valve (5) is arranged in the first cavity (8) at a position connected to the spool installation cavity; the electromagnet (2) is coaxially arranged on the left side of the proportional valve spool (3); Features: It also includes a cover body (18) mounted on the upper end of the valve body (1); the internal space between the cover body (18) and the valve body (1) forms an installation chamber; the controller (17) is arranged in the installation chamber and is fixedly connected to the valve body (1); A proportional valve connector (10) is provided at a position on the valve body (1) corresponding to the electromagnet (2); pin interfaces are provided at both the upper and lower ends of the proportional valve connector (10); the pin interface at the upper end is used to be electrically connected to the controller (17), and the pin interface at the lower end is electrically connected to the electromagnet (2); both pin interfaces are made of conductive material and are electrically connected to each other; the proportional valve connector (10) is sealed to the valve body (1); An air source air inlet (11) is provided at the upper end of the valve body (1) near one side of the quick exhaust valve (6); one end of the air inlet path (12) is connected to the air source air inlet (11), and the other end extends to the position of the proportional valve core (3) and is communicated with the core air inlet (13); A pressure relief exhaust passage (14) is provided in the valve body (1), one end of the pressure relief exhaust passage (14) is communicated with the space between the electromagnet (2) and the proportional valve core (3), and the other end is communicated with the exhaust passage (15) of the quick exhaust valve (6); a third cavity is axially provided on the valve body of the quick exhaust valve (6), a safety valve (7) is installed in the third cavity, one end of the third cavity is communicated with the first cavity (8), and the other end is communicated with the exhaust passage (15) provided on the quick exhaust valve (6); the opening preset pressure value of the safety valve (7) is equal to the preset safety pressure value of the first cavity (8); An onboard pressure sensor (19) is disposed on the lower surface of the controller (17); an air inlet (16) communicating with the first cavity (8) is provided on the upper surface of the valve body (1) at a position corresponding to the onboard pressure sensor (19); a sensitive element of the onboard pressure sensor (19) extends into the first cavity through the air inlet (16).

2. A hydraulic retarder integrated proportional control valve assembly according to claim 1, characterized in that: The upper surface of the controller (17) is provided with a first sealing fixing seat (21) and a second sealing fixing seat (22) of a pin structure; A first external interface (23) protruding upward is provided on the cover body (18) at a position corresponding to the first sealing fixing seat (21), and a second external interface (24) protruding upward is provided on the cover body (18) at a position corresponding to the second sealing fixing seat (22), which are used to be connected to the oil and water temperature sensor wiring harness on the retarder and the vehicle end respectively.

3. A hydraulic retarder integrated proportional control valve assembly according to claim 1 or 2, characterized in that: A pin shaft (25) is provided at one end of the lower surface of the controller (17) away from the onboard pressure sensor (19), and a pin hole is provided on the valve body (1) at a position corresponding to the pin shaft (25); the pin shaft (25) cooperates with the pin hole to achieve positioning.

4. A hydraulic retarder integrated proportional control valve assembly according to claim 3, characterized in that: The air source inlet (11) is a VOSS quick-plug interface.

5. The hydraulic retarder integrated proportional control valve assembly according to claim 4 is characterized in that: The cover body (18) is made of injection-molded material, and is sealed with the valve body (1) via a special-shaped rubber seal ring.

6. A hydraulic retarder integrated proportional control valve assembly according to claim 5, characterized in that: The proportional valve connector (10) and the valve body (1) are sealed via a special-shaped rubber sealing ring.

7. The hydraulic retarder integrated proportional control valve assembly according to claim 1, characterized in that: The connecting valve (5) is made of rubber.

8. The hydraulic retarder integrated proportional control valve assembly according to claim 7, characterized in that: The cover body (18) is provided with a vent plug (27).

9. The hydraulic retarder integrated proportional control valve assembly according to claim 8, characterized in that: The controller (17) is fixedly connected to the valve body (1) via a plurality of screws; The cover body (18) is fixedly connected to the valve body (1) via a plurality of screws.

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