Engine cylinder head water jacket

Abstract

The invention relates to the technical field of internal combustion engine cooling, and discloses an engine cylinder head water jacket which is applicable to engine cylinder heads with integrated exhaust pipelines. The engine cylinder head water jacket comprises an upper water jacket and a lower water jacket, wherein the upper water jacket comprises a cylinder cooling water channel and an exhaust pipeline upper surface cooling water channel; the lower water jacket comprises an exhaust pipeline lower surface cooling water channel; hollow structures for guiding cooling water are respectively arranged on the exhaust pipeline upper surface cooling water channel and the exhaust pipeline lower surface cooling water channel. By adopting the engine cylinder head water jacket, the cooling effect of an exhaust side can be enhanced, and the cooling uniformity can be improved.

Description

Technical field [0001] The invention relates to the technical field of internal combustion engine cooling, in particular to an engine cylinder head water jacket, which is suitable for an engine cylinder head integrated with an exhaust pipe. Background technique [0002] With the attention to vehicle power and economy, automakers are constantly improving the design of engines. The engine cylinder head integrated exhaust manifold technology makes the exhaust manifold and cylinder head integrated through casting. The design can not only increase the warm-up speed of the engine, avoid exhaust manifold leakage, but also reduce the temperature of the engine exhaust, and solve the problem of excessive exhaust temperature of the supercharged direct injection engine. However, the integrated exhaust manifold of the engine increases the difficulty of designing the water jacket of the engine cylinder head. [0003] Traditional engine cylinder head water jackets are mostly integrated water jac...

AI Technical Summary

Problems solved by technology

However, the integrated exhaust manifold of the engine increases the design difficulty of the water jacket of the engine cylinder head

[0003] The traditional engine cylinder head water jacket is mostly integral water jacket, but for the cylinder head water jacket with integrated exhaust manifold, if it is made into an integral water jacket, the water jacket mold will be very complicated, so the cylinder head with integrated exhaust manifold The water jacket is mostly multi-piece water jacket

In the multi-piece water jacket, it is difficult to control the flow rate and pressure of the coolant between the water jackets. In addition, the temperature of the exhaust pipe is high, which will easily cause uneven cooling of various parts of the cylinder head and affect the service life of the cylinder head.

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