An oil-gas separation structure and pressure regulating function integrated cylinder head cover for range extender

By integrating oil-gas separation and pressure regulation modules into the cylinder head cover of the range extender, the problem of low integration of the crankcase ventilation system is solved, resulting in fewer parts, lower costs, and improved separation effect, while also improving engine reliability and environmental friendliness.

CN224379974UActive Publication Date: 2026-06-19ZHEJIANG LILE NEW ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG LILE NEW ENERGY CO LTD
Filing Date
2025-07-24
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In existing technologies, the crankcase ventilation system of range extenders has low integration, which leads to complex assembly, increases the number of engine parts and overall machine cost, and at the same time, the separation effect is poor, affecting engine reliability and environmental pollution.

Method used

Design a cylinder head cover that integrates oil-gas separation structure and pressure regulation function. The oil-gas separation module is located inside the cylinder head cover and adopts a three-stage separation structure. The pressure regulation module is located on the upper surface of the cylinder head cover. Through the combination of oil-gas separation shell, separation baffle, separation chamber and breathing chamber, oil-gas separation and pressure regulation are achieved.

Benefits of technology

This reduces engine parts, lowers overall machine cost, improves oil-gas separation, reduces oil consumption, and the metal plate design of the breather improves durability and reduces maintenance frequency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224379974U_ABST
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Abstract

The utility model relates to a cylinder cover of range extender with integrated oil-gas separation structure and pressure regulating function. It includes cylinder cover, oil-gas separation module and pressure regulating module, oil-gas separation module is in the inside of cylinder cover as a whole, oil-gas separation module is constituted by oil-gas separation shell, first -class separation baffle, second -class separation baffle, third -class separation chamber and rear cavity, and the front end of oil-gas separation shell is equipped with air intake, and the bottom of oil-gas separation shell is equipped with first oil guide groove, second oil guide groove and oil guide slope, pressure regulating module is in the upper surface of cylinder cover as a whole, and pressure regulating module is constituted by pressure regulating cover, full load breathing cavity, low load breathing cavity, full load breather, low load breather, first external connection pipe and second external connection pipe. Oil-gas separation module and pressure regulating module in the utility model are integrated on cylinder cover, and the overall structure is compact, thereby reducing engine parts quantity and whole machine cost, and improving its market competitiveness.
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