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

Abstract

The utility model relates to a double-layer water jacket structure of a cylinder head of a cross-flow cooling engine, which relates to a water jacket structure of the cylinder head. There are four groups of combustion chamber areas at the rear end of the upper water jacket, each group includes the spark plug area, intake valve area and exhaust valve area, the lower water jacket is stacked and fixed on the bottom front end of the upper water jacket to form a double-layer structure and the upper water jacket The four sets of combustion chambers are exposed. There are two water feeders and channels connected vertically between the lower water jacket and the upper water jacket at the front end of the double-layer structure. The bottom surface of the water jacket is provided with four upper nozzles on the bridge of the nose and five upper nozzles on the cylinder head. The bottom surface of the upper water jacket is provided with five outlets on the cylinder head and eight water outlets on the water jacket. rise. 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 uniform cooling and effectively reduce heat load.

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] The engine cylinder head is the core component of the engine. Its main function is 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...

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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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