Hydraulic retarder integrated proportional control valve assembly

Abstract

The application provides a hydraulic retarder integrated proportional control valve assembly, which is used to solve the technical problems of poor control torque accuracy, more connection wire harnesses leading to more failure risk points and occupation of the driver's room space of the existing split hydraulic retarder. The integrated proportional control valve assembly provided by the application realizes the electrical connection of the controller and the electromagnet through the proportional valve connector provided with a pin interface, cooperates with the avoidance design of the plate-mounted pressure sensor on the lower surface of the controller, the air inlet on the valve body and the like, and realizes one-to-one installation with the hydraulic retarder, so that the torque control accuracy of the hydraulic retarder is greatly improved. Meanwhile, the proportional valve connector is used instead of the wire harness and the injection molding connector, which not only avoids the system problems caused by the failure of the wire harness, but also avoids the hidden dangers such as dust impurities and water vapor entering the system caused by the failure of the injection molding connector, so that the operation cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to hydraulic retarders, and more particularly to a hydraulic retarder integrated proportional control valve assembly. Background Technology

[0002] A hydraulic retarder is an integrated product combining mechanical, electrical, pneumatic, and hydraulic systems. It mainly consists of a hydraulic retarder mechanical assembly, a controller (pressure control module), a control valve (pneumatic actuator module), wiring harnesses, an operating handle, and sensors. Current retarder technology uses a separate layout for the controller and mechanical assembly. The controller is installed in the vehicle's cab, while the control valve and sensors are mounted on the retarder mechanical assembly and mounted at the rear of the gearbox. Multiple wiring harnesses transmit control signals from the vehicle's handle and VCU to the control valve for pressure control. However, this separate layout has drawbacks such as low control accuracy, complex arrangement, and space occupation in the cab. First, because the controller program and the mechanical body are not in one-to-one correspondence, the accuracy of torque control is poor, failing to meet the high-precision torque control requirements of the entire vehicle. Second, this solution involves numerous wiring harnesses, from sensors to the control valve, from the control valve to the controller, and from the controller to the vehicle; the more connection points, the more potential points of failure. Finally, as the level of intelligence and automation of vehicles increases, the number of control components in the vehicle cab is also increasing. The existing split-layout hydraulic retarders can no longer meet the needs of the vehicle. The industry has clearly proposed the need to move the controller of the hydraulic retarder out of the cab. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems of poor control torque accuracy, numerous connection harnesses leading to multiple fault risk points, and occupation of cab space in existing split-type hydraulic retarders, and to provide a hydraulic retarder integrated proportional control valve assembly.

[0004] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0005] A hydraulic retarder integrated proportional control valve assembly includes a proportional valve module and a controller. The proportional valve module includes a valve body, an electromagnet disposed within the valve body, a pressure regulating module, and an air intake passage. The pressure regulating module includes a proportional valve core, a valve core spring, a connecting valve, and a quick-exit valve. A valve core mounting cavity is provided within the valve body, and the proportional valve core and valve core spring are coaxially mounted within the valve core mounting cavity from the inside out. A first cavity communicating with an external hydraulic retarder cavity is opened at one end of the valve body near the vehicle frame, and the quick-exit valve is disposed in the first cavity. The connecting valve is disposed within the first cavity at a position connecting to the valve core mounting cavity. The electromagnet is coaxially disposed on the left side of the proportional valve core. The assembly is unique in that it also includes a cover mounted on the upper end of the valve body. The internal space between the cover and the valve body forms a mounting chamber. The controller is disposed within the mounting chamber and is fixedly connected to the valve body.

[0006] A proportional valve connector is provided on the valve body at the position corresponding to the electromagnet; both ends of the proportional valve connector are provided with pin interfaces, the upper pin interface is used for electrical connection with the controller, and the lower pin interface is used for electrical connection with the electromagnet; both pin interfaces are made of conductive material and are electrically connected to each other; the proportional valve connector is sealed to the valve body.

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

[0008] The valve body is provided with a pressure relief and exhaust channel. One end of the pressure relief and exhaust channel is connected to the space between the electromagnet and the proportional valve core, and the other end is connected to the exhaust channel of the quick exhaust valve.

[0009] The quick-release valve has a third chamber axially arranged on its valve body. A safety valve is installed in the third chamber. One end of the third chamber is connected to the first chamber, and the other end is connected to the exhaust channel provided on the quick-release valve. The preset opening pressure value of the safety valve is equal to the preset safety pressure value of the first chamber.

[0010] The lower surface of the controller is provided with an onboard pressure sensor; the upper surface of the valve body is provided with an air inlet corresponding to the position of the onboard pressure sensor, which communicates with the first cavity, and the sensitive element of the onboard pressure sensor extends into the first cavity through the air inlet.

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

[0012] The cover has a first external interface that protrudes upwards at the position corresponding to the first sealing and fixing seat, and a second external interface that protrudes upwards at the position corresponding to the second sealing and fixing seat, for connecting to the oil and water temperature sensor wiring harness on the retarder and the vehicle end, respectively.

[0013] Furthermore, a pin is provided on the lower surface of the controller at the end away from the onboard pressure sensor, and a pin hole is provided on the valve body at the position 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-connect interface.

[0015] Furthermore, the cover is made of injection molded material, and it is sealed to the valve body by a special-shaped rubber sealing ring.

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

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

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

[0019] Furthermore, the controller is fixed to the valve body by multiple screws;

[0020] The cover is fixed to the valve body by multiple screws.

[0021] The advantages of this invention compared to the prior art are as follows:

[0022] 1. This invention provides a hydraulic retarder integrated proportional control valve assembly. Through a proportional valve connector with a pin interface, the controller and electromagnet are electrically connected. Simultaneously, the design avoids the onboard pressure sensor on the lower surface of the controller and the air inlet on the valve body, integrating the controller onto the valve body and then mounting it integrally onto the hydraulic retarder. This one-to-one installation allows the characteristic curve of the hydraulic retarder to be individually calibrated within the controller, ensuring that the torque control of each hydraulic retarder is based on its own characteristics, thus greatly improving the torque control accuracy of the hydraulic retarder. Furthermore, this invention uses a proportional valve connector instead of wiring harnesses and injection-molded connectors, avoiding system problems caused by wiring harness failure and the potential hazards of dust, impurities, and moisture entering the system due to injection-molded connector failure, effectively reducing operating costs.

[0023] 2. The present invention provides a hydraulic retarder integrated proportional control valve assembly. By setting a pressure relief and exhaust channel connected to the exhaust channel of the quick exhaust valve, excess gas generated between the electromagnet and the proportional valve core is led out through the pressure relief and exhaust channel to the exhaust channel of the quick exhaust valve. The gas to be discharged in the exhaust channel of the quick exhaust valve is discharged out of the valve body together with the gas to be discharged in the exhaust channel of the quick exhaust valve, which effectively avoids the risk of internal corrosion caused by water vapor backflow.

[0024] 3. Compared to existing controllers and proportional valves that transmit signals through long wiring harnesses throughout the vehicle, this invention designs a proportional valve connector with a pin interface on the valve body and an adapted insertion structure on the controller. This is equivalent to the solenoid valve actuator module being directly inserted into the controller as a board-end device, reducing the risk of failure caused by wiring harness connections and making the communication between the solenoid valve and the controller more stable and reliable.

[0025] 4. Compared to existing hydraulic retarders that externally mount pressure sensors on the top of the retarder housing for monitoring control air pressure, making the pressure sensors susceptible to damage from impacts and requiring wiring harnesses to connect to the controller, this invention integrates the onboard pressure sensor onto the controller through a unique air duct design. This places the onboard pressure sensor in an internal environment, enabling accurate monitoring of the hydraulic retarder oil sump pressure, improving monitoring reliability, and significantly reducing wiring harness costs.

[0026] 5. Compared to existing proportional control valves, which can only place the air source inlet at the front end of the proportional valve core, resulting in a large distance from the vehicle frame and a high failure rate due to large vibration amplitude during vehicle operation, this invention places the upper end of the air source inlet closer to the quick exhaust valve. This satisfies the requirement for seamless docking with the controller, and the air source inlet is closer to the vehicle frame. This not only effectively solves the system failure problem, making the system response faster and the control more precise, but also facilitates the layout of the wiring harness at the vehicle end.

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

[0028] 7. Compared with the independent design of traditional safety valves and quick-release valves, this invention integrates the safety valve into the quick-release valve. While ensuring the functions of quick exhaust and overpressure prevention, it achieves modular integration, small size and convenient installation. At the same time, this quick-release valve can be assembled together with electromagnets, proportional valve cores, etc. from one direction.

[0029] 8. Compared to the conventional solution of directly soldering the pins for external connections onto the controller circuit board, this invention provides a first and second sealing fixing seat for the pin structure on the upper surface of the controller, and a first and second external interface protruding upwards on the cover. This structure, while enabling the connection between the controller and the retarder and the vehicle, also has the following three advantages: it realizes the installation and positioning function of the controller and the cover; it reduces the soldering difficulty of the controller, improves the verticality of the pins, and avoids the installation difficulty of aligning multiple pins and holes simultaneously during installation; compared to existing pin and interface integrated connectors, this separate and integrated structure occupies less space, allowing more space for the controller to be laid out, and is more suitable for use in space-constrained structures.

[0030] 9. When the onboard pressure sensor of this invention extends into the air inlet, it achieves one-point positioning. At the same time, a pin is set on the lower surface of the controller, and a pin hole is opened on the valve body at the corresponding position of the pin. The pin and the pin hole cooperate to achieve another-point positioning. Based on the connection between the controller and the valve body, the positioning and guidance of the two parts improve the reliability of the assembly and the mating of the proportional valve connector, and ensure the accuracy of the assembly of the proportional valve connector and the plug-in structure on the controller. In addition, it improves the positional accuracy of the controller connecting bolts and the housing fixing holes, as well as the bolt assembly processability. Attached Figure Description

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

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

[0033] Figure 3 This is a longitudinal sectional view of the proportional valve module along the electromagnet and the proportional valve core in an embodiment of the present invention.

[0034] Figure 4 This is a longitudinal sectional view of the proportional valve module along the proportional valve connector in an embodiment of the present invention.

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

[0036] Figure 6 This is a longitudinal sectional view of the proportional valve module along the intake air path in an embodiment of the present invention.

[0037] Figure 7 This is a bottom view of the proportional valve module in an embodiment of the present invention.

[0038] The specific labeling in the attached diagram is 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 chamber; 9-Second chamber; 10-Proportional valve connector; 11-Air source inlet; 12-Inlet air path; 13-Valve core inlet; 14-Pressure relief exhaust channel; 15-Exhaust channel; 16-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; 26-Insertion structure; 27-Ventilator plug. Detailed Implementation

[0040] To make the advantages and features of the present invention clearer, the present invention will be 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 18. The cover 18 is made of injection-molded material and is evenly fixed to the upper end of the valve body 1 by multiple screws. The internal space between the cover 18 and the valve body 1 forms an installation chamber. The controller 17 has an irregular shape and is disposed within the installation chamber and fixed to the upper end of the valve body 1 by multiple screws, providing good protection for the controller 17. Simultaneously, the cover 18 and the valve body 1 are sealed by an irregularly shaped rubber sealing ring, and a vent plug 27 is designed on the top of the cover 18 to enhance the protection of the controller 17.

[0042] like Figure 3 As shown, the proportional valve module includes a valve body 1, an electromagnet 2 disposed within the valve body 1, a pressure regulating module, and an air intake passage 12. The pressure regulating module includes a proportional valve core 3, a valve core spring 4, a connecting valve 5, and a quick-release valve 6.

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

[0044] A first cavity 8 is formed at one end of the valve body 1 near the vehicle frame. A quick-release valve 6 is disposed within the first cavity 8. An air inlet 16, connecting to an external hydraulic retarder cavity, is provided on the side wall of the valve body 1 at a position corresponding to the first cavity 8, allowing gas flow between the first cavity 8 and the hydraulic retarder cavity. A connecting valve 5 is coaxially disposed within the first cavity 8 at a position connecting to the valve core mounting cavity, forming a second cavity 9 between the proportional valve core 3 and the connecting valve 5.

[0045] like Figure 4As shown, electromagnet 2 is coaxially positioned on the left side of proportional valve core 3. A proportional valve connector 10 is located on the upper end of valve body 1 corresponding to the position of electromagnet 2. A plug-in structure 26 is provided on the lower surface of controller 17. In this invention, both the upper and lower ends of the proportional valve connector 10 are provided with pin interfaces. The upper pin interface is used to cooperate with the plug-in structure 26 to achieve electrical connection, and the lower pin interface is electrically connected to electromagnet 2. Both the upper and lower pin interfaces of the proportional valve connector 10 are made of conductive material, and the two pin interfaces are electrically connected. Compared to the existing method of connecting the controller and proportional valve through a long wiring harness, this invention uses a pin-type structure for the proportional valve connector 10, allowing direct electrical connection between controller 17 and electromagnet 2 through the pin interfaces at both ends of the proportional valve connector 10. This reduces the risk of failure caused by wiring harness connections and strengthens the fixed connection between valve body 1 and controller 17. Meanwhile, the connection between the proportional valve connector 10 and the valve body 1 is sealed with a rubber sealing ring, which ensures the airtightness between the controller chamber and the chamber where the electromagnet 2 is located while achieving electrical conductivity.

[0046] like Figure 5 As shown, an onboard pressure sensor 19 is also provided on the lower surface of the controller 17. An air inlet 16, communicating with the first cavity, is provided on the upper surface of the valve body 1 at the position corresponding to the onboard pressure sensor 19. 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, achieving isolation and sealing between the first cavity and the controller chamber. Compared to the existing external sensor design, placing the onboard pressure sensor 19 within the internal environment allows for accurate monitoring of the hydraulic retarder oil sump pressure, improving monitoring reliability and significantly reducing wiring harness costs.

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

[0048] Because this invention needs to interface with an external control system, the air intake passage 12 of the valve body 1 has been redesigned according to the principle of reasonable space avoidance, as follows: Figure 6As shown, the air source inlet 11 is located on the upper part of the valve body 1, near the quick-release valve 6, which is closer to the vehicle frame and facilitates the wiring harness layout of the entire vehicle. One end of the intake air passage 12 is connected to the air source inlet 11, and the other end extends to the location of the proportional valve core 3 and communicates with the valve core inlet 13. To improve product compatibility, the air source inlet 11 is designed to be compatible with various commonly used host interfaces. In this embodiment, it is preferably designed as a VOSS quick-connect interface to facilitate quick docking with external structures.

[0049] During operation, some gas is generated in the space between the electromagnet 2 and the proportional valve core 3. To expel this gas from the valve body 1, existing proportional control valves 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, allowing the gas to be directly discharged outside the valve body 1. However, during vehicle operation, moisture can easily flow back into the pressure relief vent, potentially causing corrosion and other risks within the system. To solve this problem, such as... Figure 7 As shown, the present invention provides a pressure relief and exhaust channel 14 inside the valve body 1. One end of the pressure relief and 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 through the pressure relief and exhaust channel 14 to the exhaust channel 15 of the quick exhaust valve 6, 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] The quick-release valve 6 has a third chamber axially arranged on its valve body. A safety valve 7 is installed in this third chamber. One end of the third chamber is connected to the first chamber 8, and the other end is connected to the exhaust channel 15 of the quick-release valve 6, enabling rapid exhaust of the entire system. The preset opening pressure of the safety valve 7 is equal to the preset safety pressure of the first chamber 8. When the system pressure becomes unbalanced, excess gas can be quickly discharged from the valve body 1 through the safety valve 7, restoring the system to balance. Furthermore, in this invention, the safety valve 7 is integrated into the quick-release valve 6. Compared to the traditional independent design of the safety valve 7 and quick-release valve 6, this integrated structure allows for more redundant space for the arrangement of other components in the system. The quick-release valve 6 designed in this invention eliminates unnecessary materials, allowing the proportional valve core 3, connecting valve 5, and pressure regulating module to be assembled together from a single direction, making assembly more convenient and the product 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 with a pin structure. A first external interface 23 protruding upwards is provided on the cover 18 corresponding to the position of the first sealing fixing seat 21, and a second external interface 24 protruding upwards is provided on the cover 18 corresponding to the position of the second sealing fixing seat 22. The first sealing fixing seat 21 and the first external interface 23 cooperate to form an external electrical control interface for the controller, used to realize communication between the controller 17 and the oil / water temperature sensor on the retarder. The second sealing fixing seat 22 and the second external interface 24 cooperate to form an external electrical control interface for the controller, used to realize communication between the controller 17 and the vehicle. Simultaneously, the cooperation of the first sealing fixing seat 21 and the first external interface 23, and the cooperation of the second sealing fixing seat 22 and the second external interface 24, can achieve positioning guidance between the cover 18 and the controller 17. Preferably, the above two external electrical control interfaces are integrated with the air source inlet 11 in one corner, facilitating the circuit board design of the controller 17 and the external connection arrangement of the integrated proportional control valve assembly with 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, the controller 17 transmits an electrical signal to the electromagnet 2 through the proportional valve connector 10. The electromagnet 2 is energized and subjected to force. 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 air source of the whole vehicle (the gas in the intake air passage 12) enters the proportional valve core 3 through the valve core intake port 13 and then flows to the second chamber 9. At the same time, the connecting valve 5 is pushed to the right by the pressure difference between the second chamber 9 and the first chamber 8. At this time, the exhaust passage 15 of the quick exhaust valve 6 is blocked. The gas enters the first chamber 8 through the gap between the connecting valve 5 and the side wall of the first chamber 8, and then enters the hydraulic retarder chamber through the intake port 16.

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

[0055] Pressure protection: When the inlet pressure of the integrated proportional control valve exceeds the safety pressure set by the safety valve 7, the safety valve 7 is pushed open to the right to release 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 solutions of the present invention, and is not intended to limit them. For those skilled in the art, modifications can be made to the specific technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions 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) disposed within the valve body (1), a pressure regulating module, and an air intake passage (12); the pressure regulating module comprises a proportional valve core (3), a valve core spring (4), a connecting valve (5), and a quick-release valve (6); a valve core mounting cavity is provided within the valve body (1), and the proportional valve core (3) and the valve core spring (4) are coaxially mounted within the valve core mounting cavity from the inside to the outside; a first cavity (8) communicating with an external hydraulic retarder cavity is opened at one end of the valve body (1) near the vehicle frame, and the quick-release valve (6) is disposed within the first cavity (8); the connecting valve (5) is disposed within the first cavity (8) at the position connecting the valve core mounting cavity; the electromagnet (2) is coaxially disposed on the left side of the proportional valve core (3); Its features are: It also includes a cover (18) installed on the upper end of the valve body (1); the internal space between the cover (18) and the valve body (1) forms an installation chamber; the controller (17) is disposed in the installation chamber and is fixedly connected to the valve body (1); A proportional valve connector (10) is provided on the valve body (1) at the position corresponding to the electromagnet (2); both the upper and lower ends of the proportional valve connector (10) are provided with pin interfaces, the upper pin interface is used to electrically connect with the controller (17), and the lower pin interface is electrically connected with 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 inlet (11) is provided at the upper end of the valve body (1) near the quick exhaust valve (6); one end of the air inlet passage (12) is connected to the air inlet (11), and the other end extends to the position of the proportional valve core (3) and communicates with the valve core inlet (13). The valve body (1) is provided with a pressure relief and exhaust channel (14). One end of the pressure relief and 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 valve body of the quick exhaust valve (6) is provided with a third chamber axially. A safety valve (7) is installed in the third chamber. One end of the third chamber is connected to the first chamber (8), and the other end is connected to the exhaust channel (15) provided on the quick exhaust valve (6). The preset opening pressure value of the safety valve (7) is equal to the preset safety pressure value of the first chamber (8). The lower surface of the controller (17) is provided with an onboard pressure sensor (19); the upper surface of the valve body (1) is provided with an air inlet (16) corresponding to the position of the onboard pressure sensor (19) and communicating with the first cavity (8). The sensitive element of the onboard pressure sensor (19) extends into the first cavity through the air inlet (16).

2. The 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) with a pin structure; The cover (18) has a first external interface (23) that protrudes upward at the position corresponding to the first sealing fixing seat (21), and the cover (18) has a second external interface (24) that protrudes upward at the position corresponding to the second sealing fixing seat (22), which are used to connect 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 (25) is provided on 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 the position corresponding to the pin (25); the pin (25) and the pin hole cooperate to achieve positioning.

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

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

6. The 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 by 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: A vent plug (27) is provided on the cover (18).

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

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