Cylinder cover double-layer water jacket structure of cross-flow cooling engine

Abstract

The invention discloses a cylinder cover double-layer water jacket structure of a cross-flow cooling engine, and relates to a cylinder cover water jacket structure. Four groups of combustion chamber areas are arranged at the rear end of an upper-layer water jacket, each group of combustion chamber areas comprises a spark plug area, an intake valve area and an exhaust valve area, a lower-layer water jacket is stacked and fixed at the front end of the bottom of the upper-layer water jacket to form a double-layer structure, and the four groups of combustion chamber areas of the upper-layer water jacket are exposed; two water feeding machining channels are formed in the positions, at the front end of the double-layer structure, between the lower-layer water jacket and the upper-layer water jacket in a vertically communicated manner, eight water jacket water feeding openings are formed in the rear end of the bottom face of the lower-layer water jacket, four nose bridge water feeding openings and five cylinder cover water feeding openings are formed in the bottom face of the upper-layer water jacket, and five cylinder cover water outlets and eight water jacket water outlets are formed in the bottom face of the upper-layer water jacket; and a water flow guide bulge is arranged in a cavity of the upper-layer water jacket. The double-layer water jacket structure is designed for the four-cylinder engine, a cross-flow form of water inlet at the exhaust side and water outlet at the air inlet side is adopted, the cooling uniformity is guaranteed, and the thermal load is effectively reduced.

Description

technical field [0001] The invention relates to a water jacket structure of a cylinder head, in particular to a double-layer water jacket structure of a cylinder head of a cross-flow cooling engine, and belongs to the technical field of engines. Background technique [0002] As the core component of the engine, the cylinder head of the engine is mainly used to close the upper part of the cylinder, form the combustion chamber together with the piston and the cylinder, and bear the gas pressure inside the cylinder. Provide the installation location to ensure the normal operation of the engine. [0003] With the increasingly stringent requirements on engine power and fuel economy, small and enhanced engines that incorporate technologies such as high compression ratio, high boost, and small displacement have emerged as the times require. Due to the continuous improvement of engine strengthening, the thermal load of the cylinder head is gradually increasing. However, the structu...

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Problems solved by technology

Due to the continuous improvement of engine strengthening, the thermal load of the cylinder head is gradually increasing. However, the structure of the traditional longitudinal flow water jacket is too simple. The water inlet and outlet of the water jacket are respectively arranged at the front and rear ends of the engine. It has been difficult to meet the cooling effect on the nose bridge area of ​​the cylinder head

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