Exhaust gas recirculation system, water accumulation removal method, and vehicle

By designing a bypass hole and a dual-disc linkage mechanism in the EGR valve, accumulated water is discharged through the exhaust or drainage pipe and evaporated in the high-temperature area, solving the problem of high cost and low efficiency in EGR water treatment, and improving the engine's operating stability and environmental adaptability in cold regions.

CN120946478BActive Publication Date: 2026-01-20WEICHAI POWER CO LTD
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Patent Information

Application Number
CN202511495841.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-10-20
Publication Date
2026-01-20
Estimated Expiration
2045-10-20

AI Technical Summary

Technical Problem

Existing EGR water retention treatment technologies are costly and inefficient, leading to EGR valve sticking in cold environments and affecting the normal operation of the engine.

Method used

Design an integrated EGR valve that includes a bypass port and a dual-disc linkage mechanism. The movement of the discs is controlled by a drive motor, and the accumulated water is discharged through the bypass port and discharged through the exhaust pipe or drain pipe, combined with the evaporation of accumulated water in the high-temperature area of ​​the engine.

Benefits of technology

It achieves efficient and low-cost drainage of accumulated water, avoids EGR valve jamming, improves engine operating stability and environmental adaptability in cold regions, and reduces maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application belongs to the technical field of engines and provides an exhaust gas recirculation system, a water accumulation removal method and a vehicle. The system comprises an integrated EGR valve, a valve body, a main disc, a secondary disc and a driving shaft, the driving shaft connects the main disc and the secondary disc to form a double-disc linkage mechanism, and a bypass hole is arranged at a water accumulation prone position of the valve body; a driving motor is connected with the integrated EGR valve and used to drive the driving shaft to move to drive the main disc and the secondary disc to move, when water accumulation inside the integrated EGR valve needs to be discharged, the double-disc linkage mechanism is driven to move to a position not shielding the bypass hole, so that the water accumulation is discharged from the bypass hole. The bypass hole is arranged at the water accumulation prone position of the integrated EGR valve, water is discharged, no space is occupied, the structure is compact, and the water discharge efficiency can meet the requirements. The problem of high processing cost and low efficiency of the EGR water accumulation processing technology is solved.
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Citation Information

Patent Citations

  • Exhaust gas recirculation valve, exhaust gas recirculation system for vehicle and vehicle

    CN218235301U

  • Internal combustion engine

    JP2021105358A