Engine cylinder head

Abstract

The invention provides an engine cylinder head. The engine cylinder head comprises a water inlet, a water outlet, an exhaust port and a plurality of exhaust passages which are arranged corresponding to the plurality of combustion chambers and converged to the exhaust port, an exhaust valve is arranged in the exhaust passages, a cooling water jacket is formed between the water inlet and the water outlet, the cooling water jacket comprises a water jacket main body, a lower water jacket which is extracted from the side of each combustion chamber of the water jacket main body and an upper water jacket which passes through the exhaust valves of each combustion chambers and is connected with the water jacket main body, the lower water jacket and the upper water jacket are respectively covered onthe lower part and the upper part of each exhaust passage, wherein the lower water jacket and the upper water jacket are respectively provided with a hollow area on the positions of the correspondingexhaust passages. The engine cylinder head can not only utilize the heat in the exhaust gas to heat the cooling liquid so as to realize rapid warm-up, but also can avoid influence of the cooling water jacket on the heat dissipation of a radiator.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine cylinder head. Background technique [0002] With the increasing pressure of environmental protection and the increasing pursuit of automobile performance by users, the mainstream response technologies for automobile engines focus on the development of miniaturization technology, direct injection technology, supercharging technology, variable intake technology, cylinder Cover integrated exhaust manifold technology and much more. [0003] Because in the prior art, a large part of the heat of the engine is taken away by the exhaust, the heat utilization rate is low; when the engine is started, the temperature cannot be raised rapidly to achieve rapid warm-up, so the engine cannot achieve the best working environment, and then it will It leads to increased fuel consumption and incomplete combustion of exhaust gases during engine start-up, which is not conducive to energy ...

AI Technical Summary

Problems solved by technology

However, the cooling water jacket is often designed to fully wrap the exhaust manifold structure. Such a cooling water jacket will cause problems in the heat dissipation of the engine radiator and make heat management difficult.

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