A double-layer water jacket structure of a cylinder head for a cross-flow cooling engine

Abstract

A double-layer water jacket structure of a cylinder head of a cross-flow cooling engine relates to a water jacket structure of a cylinder head. The upper water jacket and the lower water jacket are stacked and fixed to form a double-layer structure. There are four groups of combustion chamber areas at the rear end, each group including a spark plug area, an intake valve area and an exhaust valve area. The bottom surface of the lower water jacket has four The upper nozzle of the cylinder head and the two upper nozzles of the water jacket, the upper water jacket and the lower water jacket are vertically connected with two water supply channels and three water supply channels, and there are five cylinder covers on the bottom surface of the lower water jacket. The water outlet and the eight water jacket water outlets are respectively provided with water flow guiding protrusions in the cavities of the upper water jacket and the lower water jacket. A double-layer water jacket structure is designed for the four-cylinder engine, which adopts the cross-flow form of water inlet on the exhaust side and water outlet on the intake side to ensure the uniformity of cooling and effectively reduce the heat load.

Description

technical field [0001] The invention relates to a cylinder head water jacket structure, in particular to a cylinder head double-layer water jacket structure for a cross-flow cooling engine, and belongs to the technical field of engines. Background technique [0002] As the core part 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 withstand the gas pressure inside the cylinder. The cylinder head generally also contains air passages, which are valves and other components Provide a mounting position to ensure the normal operation of the engine. [0003] With the increasingly stringent requirements for engine power and fuel economy, small enhanced engines that incorporate technologies such as high compression ratio, high boost, and small displacement have emerged. Due to the continuous improvement of the engine strengthening degree, the thermal load ...

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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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