A whole vehicle air supply system and a vehicle pressure reducing valve

By designing a two-stage pressure reducing mechanism and a high-pressure dryer return pipe, the shortcomings of automotive pressure reducing valves in terms of adaptability, pressure stabilization accuracy, and sealing reliability are solved. This achieves efficient gas pressure management and energy recovery, improves the energy efficiency and service life of the vehicle's gas supply system, and meets the diverse needs of high and low pressure gas units.

CN121897633BActive Publication Date: 2026-06-26JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGNAN UNIV
Filing Date
2026-03-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing automotive pressure reducing valves cannot simultaneously achieve wide range adaptability, pressure stabilization accuracy, sealing reliability, and silent pressure relief capability. This results in insufficient energy efficiency and service life of the vehicle's compressed air supply system, inflexible switching between high and low pressure supply modes, limited functionality, serious energy waste in high-pressure exhaust, slow flow rate in low-pressure air path, and lack of drying methods, leading to insufficient overall system energy efficiency and response speed.

Method used

The vehicle pressure reducing valve, which employs a two-stage pressure reducing mechanism, works in conjunction with a high-pressure dryer and a return-blowing pipeline to achieve step-by-step pressure reduction and stabilization, high-pressure gas recovery and utilization, stable pressure regulation and overpressure relief protection between the low-pressure gas tank and the gas-using unit, and integrates high and low pressure gas circuits to enhance sealing performance and energy utilization efficiency.

Benefits of technology

It significantly broadens the applicable range of gas input pressure, improves pressure regulation accuracy and output stability, reduces system energy consumption, extends service life, enhances the applicability and safety of the vehicle gas supply system, meets the differentiated needs of high and low pressure gas units, reduces energy waste, and improves system integration and operational stability.

✦ Generated by Eureka AI based on patent content.

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    Figure CN121897633B_ABST
Patent Text Reader

Abstract

This invention provides a vehicle air supply system and a vehicle pressure reducing valve. The vehicle air supply system adopts a high-pressure dryer and a back-blowing pipeline structure, which can regenerate the dryer by back-blowing and recover high-pressure gas to a low-pressure storage tank, reducing energy consumption. The vehicle pressure reducing valve in the system includes a body, a primary pressure reducing mechanism, and a secondary pressure reducing mechanism. The body is equipped with a vent, a supply channel, and a transmission channel. The secondary pressure reducing mechanism contains a secondary pressure regulating spring, a secondary return spring, a pressure relief groove, and a secondary valve core, which can realize step-by-step pressure reduction and stabilization of gas, and automatically release pressure when overpressure occurs to protect the gas-using components. It has high pressure regulation accuracy and stable and reliable operation. In conjunction with the vehicle air supply system, it can simultaneously meet the gas demand of the high-pressure air spring and the low-pressure gas-using unit. The system has high integration, good drying effect, safety and stability, and significantly improved applicability and service life.
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