Fuel vapor pump and fuel evaporation emission control system including the same

By designing seals in the fuel vapor pump to block the flow of fuel vapor to the bearings, the problems of short life and high cost of the active desorption pump are solved, and the bearings are protected and the reliability of the pump is improved.

CN116241497BActive Publication Date: 2025-09-26CONTINENTAL AUTOMOTIVE WUHU
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Patent Information

Application Number
CN202111484688.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-12-07
Publication Date
2025-09-26
Estimated Expiration
2041-12-07

AI Technical Summary

Technical Problem

The active desorption pumps in the existing technology have a short lifespan, are easily damaged and are expensive. Especially in small-displacement fuel vehicles and hybrid vehicles, they cannot provide sufficient desorption vacuum and flow, affecting the vehicle's driving performance and safety.

Method used

A seal is designed for the fuel vapor pump. This seal prevents fuel vapor from flowing toward the bearing through an interference fit with the rotating shaft and retention by fixed components, protecting the bearing from corrosion. A U-shaped rubber layer and a lip portion with a metal bracket structure are used to improve sealing performance.

Benefits of technology

It extends the life of bearings, reduces wear, improves sealing performance, ensures the reliability and durability of fuel vapor pumps, reduces product costs, and enhances market competitiveness.

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Abstract

The present invention relates to a fuel vapor pump and a fuel evaporation emission control system including the same. The fuel vapor pump (100) includes: a rotating shaft (20) for driving a pump wheel (10) to rotate; a bearing (30) mounted on the rotating shaft (20) to rotatably support the rotating shaft; and a fixing component (40) for positioning the pump wheel (10) and / or the bearing (30) within the fuel vapor pump. The fuel vapor pump (100) also includes a seal (60) mounted on the rotating shaft (20), the fixing component (40) including a retaining portion configured to position and retain the seal (60) at a position that blocks fuel vapor from flowing toward the bearing (30).
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