Cylinder head cover for range extender integrating oil-gas separation structure and pressure adjusting function

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

Application Number
CN202521560252.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-24
Publication Date
2026-06-19
Estimated Expiration
2035-07-24

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.

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Abstract

The utility model relates to a range extender cylinder head cover integrating an oil-gas separation structure and a pressure adjusting function. The oil-gas separation device comprises a cylinder head cover, an oil-gas separation module and a pressure regulation module, the oil-gas separation module is integrally arranged on the inner side of the cylinder head cover, the oil-gas separation module is composed of an oil-gas separation shell, a first-stage separation baffle, a second-stage separation baffle, a third-stage separation cavity and a rear cavity, an air inlet is formed in the front end of the oil-gas separation shell, and a first oil guide groove, a second oil guide groove and an oil guide slope are arranged at the bottom of the oil-gas separation shell; the pressure adjusting module is integrally arranged on the upper surface of the cylinder head cover, and the pressure adjusting module is composed of a pressure adjusting cover, a full-load breathing cavity, a low-load breathing cavity, a full-load respirator, a low-load respirator, a first external pipe and a second external pipe. The oil-gas separation module and the pressure adjusting module are both integrated on the cylinder head cover, and the whole structure is compact, so that the number of parts of an engine and the cost of the whole engine are reduced, and the market competitiveness of the engine is improved.
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