Cylinder cover with built-in sodium-filled heat superconducting element and engine with cylinder cover

By incorporating a sodium-filled superconducting element into the engine cylinder head and utilizing the phase change heat transfer mechanism of the heat transfer medium, the problem of heat conduction in the local high heat load area of ​​the cylinder head is solved, the peak temperature and knock risk are reduced, and the engine's operational reliability is improved.

CN122407394APending Publication Date: 2026-07-17FAW QI NEW POWER (CHANGCHUN) TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610583300.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-29
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing engines, the heat in the local high-heat-load areas of the cylinder head cannot be transferred to the coolant in time under high-power operation, resulting in a rise in peak temperature, thermal fatigue cracks, and engine knocking.

Method used

A closed sodium-filled superconducting element is embedded inside the cylinder head. The heat transfer medium absorbs heat at the heat absorption end and vaporizes, and condenses at the heat dissipation end. Heat is transferred to the coolant through phase change, avoiding the increase of flow resistance in the narrow branch water channel.

Benefits of technology

It effectively reduces the peak temperature in areas with high local heat load, reduces the temperature distribution difference, lowers the probability of engine knocking, and avoids sealing failure problems caused by complex water channel design.

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Abstract

The invention discloses a cylinder cover with a built-in sodium-filled heat superconducting element and an engine with the same, and relates to the technical field of vehicle engines, the cylinder cover comprises an engine cylinder cover, a cylinder cover combustion chamber is formed on the bottom surface of the engine cylinder cover, and a cylinder cover water jacket is arranged in the engine cylinder cover; at least one closed sodium-filled heat superconducting element is cast and embedded in a solid body, between the cylinder cover combustion chamber and the cylinder cover water jacket, of the engine cylinder cover; a vacuumized sodium-filled cavity is formed in the sodium-filled heat superconducting element, and the sodium-filled cavity is filled with a heat transfer medium; the end, close to the air cylinder cover combustion chamber, of the sodium-filled heat superconducting element is provided with a heat absorption end, and the end, close to the air cylinder cover water jacket, of the sodium-filled heat superconducting element is provided with a heat dissipation end. According to the invention, the physical peak temperature of a local area is reduced, the structural thermal stress is reduced, and a local high-temperature surface causing engine knocking is eliminated.
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