Water jacket structure of cylinder cover covering exhaust manifold

Abstract

The invention relates to a water jacket structure of a cylinder cover covering an exhaust manifold. The structure comprises a cylinder cover body, wherein an upper water jacket and a lower water jacket are arranged in the cylinder cover body. The structure is characterized in that four water filling holes sleeve the upper water jacket, four water inlets are formed on the lower water jacket, and the four water filling holes are in one-to-one correspondence to the four water inlets, respectively; the upper water jacket covers an exhaust duct of a first cylinder and a fourth cylinder as well as an exhaust collecting port of the first cylinder and the fourth cylinder; and the lower water jacket covers an exhaust duct of a second cylinder and a third cylinder as well as an exhaust collecting port of the second cylinder and the second cylinder. The structure provided by the invention can satisfy the cooling requirement of the cylinder cover and can inhibit gas and air retention during casting, the product yield is improved, and the structure has good manufacturability.

Description

technical field [0001] The invention relates to an automobile engine cooling system, in particular to a cylinder head water jacket structure covering an exhaust manifold. Background technique [0002] In order to improve fuel consumption rate and meet CO 2 To meet emission requirements, and to meet power and torque requirements, engines mostly adopt supercharged and miniaturized structures. By integrating the exhaust manifold of the exhaust system into the cylinder head, it can not only realize the rapid temperature rise of the engine, reduce the friction loss of low-temperature start-up and avoid the interference of the engine exhaust on the turbine end pulse of the turbocharger, but also shorten the catalytic converter. The distance between the catalyst and the engine can be shortened to speed up the light-off of the catalyst, thereby reducing engine emissions. The integrated design of the exhaust manifold makes the engine compact and realizes the miniaturization and wei...

AI Technical Summary

Problems solved by technology

But at the same time, compared with the ordinary cylinder head, the cylinder head with integrated exhaust manifold has a more complicated water jacket design, and the manufacturing process of the water jacket sand core is more difficult. The main problem is that the cylinder head integrates the cooling water around the internal exhaust manifold. The structure of the jacket is complicated, and it is difficult to make the sand core. It is difficult to meet the production requirements with the traditional integral water jacket structure.

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