Dual fuel injection valve, engine and vehicle

The dual fuel injection valve design with a needle valve and retaining spring structure solves the problems of complex structure and airway blockage in the existing technology, achieves simple and compact fuel injection and unobstructed airway, and ensures engine performance.

CN117365799BActive Publication Date: 2025-10-17FAW JIEFANG AUTOMOTIVE CO
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Patent Information

Application Number
CN202311522611.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-15
Publication Date
2025-10-17
Estimated Expiration
2043-11-15

AI Technical Summary

Technical Problem

Existing dual-fuel injection valves have complex structures, are difficult to control, are large in size, difficult to install, and are prone to affecting engine performance due to pore blockage.

Method used

It adopts a needle valve and retaining spring structure. Fuel is injected through the needle valve, and gas enters through the intake duct and annular air duct. The retaining spring deforms radially under pressure to realize gas ejection. The gas jet is annular in shape to avoid coking and carbon deposition in the air duct. The fuel injection channel and the gas jet duct are designed independently.

Benefits of technology

A simple and compact dual-fuel injection valve is realized, which is easy to install and has smooth gas flow, thus avoiding coking and carbon deposition at the gas passage outlet and ensuring engine performance.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN117365799B_ABST
    Figure CN117365799B_ABST
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Abstract

The application relates to the field of automobile technology, in particular to a dual-fuel injection valve, an engine and an automobile, the dual-fuel injection valve comprising a needle valve, the needle valve comprising a valve body and a valve rod, a needle valve body hole being formed in the axial direction of the valve body, an oil injection hole being arranged at the oil injection end of the valve body and being in communication with the needle valve body hole, an air inlet being formed in the valve body and not being in communication with the needle valve body hole, the valve rod being slidingly arranged in the needle valve body hole and being used for controlling the opening and closing of the oil injection hole and the needle valve body hole; a clamping spring in a conical cylindrical structure, the clamping spring being sleeved on the oil injection end of the valve body, the clamping spring and the valve body surrounding the annular air channel, the annular air channel being in communication with the air inlet, and the sealing end of the clamping spring being in sealing connection with the oil injection end of the valve body. The application can guarantee the engine performance, and the structure is simple and convenient to install on the engine.
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Citation Information

Patent Citations

  • Dual-fuel injector

    CN110905703A

  • Needle valve assembly of oil sprayer

    CN213510991U