Engine cooling jacket structure of integrated exhaust manifold pipes

Abstract

The invention relates to an engine cooling jacket structure of integrated exhaust manifold pipes. The structure comprises a cylinder water jacket arranged in a cylinder, an air cylinder cover water jacket arranged in an air cylinder cover and an air cylinder gasket arranged between the air cylinder cover and a cylinder body; a front water hole is formed in the portion, close to the front end of an engine, of the air cylinder gasket, multiple side water holes are formed in the portions, close to the exhaust side of the engine, of the air cylinder gasket, a water inlet of the cylinder water jacket is communicated with an outlet of a water pump, and a water outlet of the cylinder water jacket is communicated with the front water hole and the side water holes. The structure is characterized in that the air cylinder cover water jacket is divided into an upper-layer water jacket body and a lower-layer water jacket body; the part, located on the upper portion of an exhaust manifold pipe convergence area, of the upper-layer water jacket body is provided with an upper water jacket communicated with the upper-layer water jacket body, the part, located on the lower portion of the exhaust manifold pipe convergence area, of the lower-layer water jacket body is provided with a lower water jacket communicated with the lower-layer water jacket body, and the upper water jacket and the lower water jacket correspond to each other and are arranged outside all the exhaust manifold pipes in a wrapping mode. According to the structure, the cooling capacity of the exhaust manifold pipe area can be improved, and the problem that engine air cylinder cover cooling of the exhaust manifold pipe water jacket is insufficient is solved.

Description

technical field

[0001] The invention relates to an automobile engine cooling system, in particular to an engine cooling water jacket structure integrating an exhaust manifold. Background technique

[0002] At present, compared with the traditional cylinder head structure, the cylinder head with integrated exhaust manifold water jacket has the advantages of reduced size, reduced weight, and shortened warm-up time, which is conducive to emission optimization and reduced friction. Therefore, the cylinder head with integrated exhaust manifold water jacket has become the development direction of gasoline engine energy saving and emission reduction. However, placing the high-temperature exhaust manifold in the cylinder head is equivalent to adding a heat source to the car engine cooling system, which makes the cylinder head already under high thermal load and mechanical load even worse. Therefore, it is necessary to design a reasonable cooling water jacket to ensure a reasonable ...

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