A downcomer sleeve and double-ply water jacket

By designing a double-layer water jacket structure and optimizing the water flow direction and path, the problem of uneven cooling of the diesel engine cylinder head was solved, resulting in more efficient heat dissipation and a longer service life.

CN224742438UActive Publication Date: 2026-09-11KUNMING YUNNEI POWER
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Patent Information

Application Number
CN202522182943.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-15
Publication Date
2026-09-11
Estimated Expiration
2035-10-15

AI Technical Summary

Technical Problem

The existing diesel engine cylinder head cooling water jacket has a simple structure, which leads to uneven cooling, excessive thermal stress, and affects heat dissipation efficiency and lifespan.

Method used

A double-layer water jacket structure is designed, in which the water flow direction of the lower water jacket is parallel to the air intake and exhaust direction and flows laterally, while the water flow direction of the upper water jacket is perpendicular to the air intake and exhaust direction and flows longitudinally. The water flow path is optimized by structures such as throttling channels and water inlets to ensure uniform distribution of cooling water and removal of air bubbles.

Benefits of technology

It improves the heat dissipation efficiency and cooling consistency of the cylinder head, avoids thermal stress caused by uneven cooling, and extends the service life of the cylinder head.

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Abstract

The utility model discloses a kind of lower water jacket and double-layer water jacket, upper water jacket is installed above lower water jacket, and upper water jacket has upper water flow passage, lower water jacket has lower water flow passage, total water inlet area is provided with total water inlet shunt groove, lower water flow passage of lower water jacket is additionally provided with throttling water channel, the top of upper water jacket is additionally provided with the opening of a plurality of water channeling mouths, the flowing direction of lower water flow passage is parallel to the direction of exhaust gas transverse flow, the flowing direction of upper water flow passage is vertical to the direction of longitudinal flow of exhaust gas.The beneficial effects of the present application are: the lower water jacket is the main cooling jacket of the cylinder head, and the water flow direction is parallel to the direction of exhaust gas transverse flow, with short flow process and small water resistance, which can improve the heat dissipation efficiency of the cylinder head.
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