Automobile engine cooling water jacket structure integrating exhaust manifold

Abstract

The invention relates to an automobile engine cooling water jacket structure integrating an exhaust manifold. The automobile engine cooling water jacket structure comprises a cylinder body water jacket, a cylinder cover water jacket and an air cylinder mat; the automobile engine cooling water jacket structure is characterized in that the cylinder body water jacket comprises a water passing way arranged on the air inlet side of an engine and a cylinder body water jacket body wrapping the air cylinder and communicating with the water passing way; and the cylinder cover water jacket comprises a burning chamber water jacket wrapping a burning chamber and communicating with the water passing way and an exhaust manifold water jacket wrapping the exhaust manifold and communicating with the burning chamber water jacket. By means of the automobile engine cooling water jacket structure, an air cylinder cover and an air cylinder body are better cooled, the cooling water distribution ratio of thecylinder body water jacket to the cylinder cover water jacket can be adjusted to enable the cooling effect on the air cylinder cover and the air cylinder body to be better, the more even air cylindertemperature can be guaranteed, the cooling strength of the burning chamber and the exhaust way zone can be adjusted, and the temperature of the burning chamber and the temperature of the exhaust way zone can keep coincident; and the cooling capacity of the exhaust manifold can be improved, and the reliability and the economical efficiency of the engine are improved.

Description

technical field [0001] The invention relates to an automobile engine, in particular to an automobile engine cooling water jacket structure integrating an exhaust manifold. Background technique [0002] The arrangement of integrating the exhaust manifold of the automobile engine on the cylinder head can use the heat of the exhaust manifold to heat the coolant during cold start, so that the coolant can quickly reach the working temperature and reduce the warm-up time; at the same time , due to the compact structure, the integrated exhaust manifold has a smaller exhaust port inner surface area than the conventional external exhaust manifold, so it can shorten the light-off time of the three-way catalyst during cold start. Under high-load conditions, the coolant can cool the exhaust gas and reduce the fuel-rich mixture, which is conducive to optimizing emissions and reducing engine fuel consumption. However, the high-temperature exhaust manifold is built into the cylinder head,...

AI Technical Summary

Problems solved by technology

However, building the high-temperature exhaust manifold into the cylinder head is equivalent to adding a heat source to the cooling system, which makes the cylinder head already under high thermal load and mechanical load worse.

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