Double-layer cylinder cover water jacket, air cylinder and vehicle

Abstract

The invention is applicable to the field of vehicles, and discloses a double-layer cylinder cover water jacket, an air cylinder and a vehicle. The double-layer cylinder cover water jacket comprises anupper water jacket and a lower water jacket, wherein the upper water jacket and the lower water jacket are stacked up and down, the upper water jacket is provided with an upper water cavity for accommodating cooling water and a water outlet for discharging the cooling water out of the upper water cavity, the lower-layer water jacket is provided with a lower water cavity used for containing the cooling water and a water inlet used for leading the cooling water into the lower water cavity, the lower water cavity is provided with a combustion chamber area corresponding to the upper portion of acylinder combustion chamber, the combustion chamber area involves an exhaust valve area, a communicating hole used for communicating the upper water cavity with the lower water cavity is formed between the upper-layer water jacket and the lower-layer water jacket, and the communicating hole is located at the position near the exhaust valve area. The invention further provides the air cylinder andthe vehicle. According to the double-layer air cylinder cover water jacket, the air cylinder and the vehicle, the cooling water can be guided to the high-heat area of the air cylinder cover, a water flow dead zone is avoided, and the cooling effect of a key high-heat part meets the requirement.

Description

technical field [0001] The invention belongs to the field of vehicles, in particular to a double-layer cylinder head water jacket, a cylinder and a vehicle. Background technique [0002] With the continuous development of engine-related technologies, the power density of engines continues to increase, and the requirements for components are becoming more and more stringent. Cylinder head is one of the most critical parts of the engine, and its reliability is closely related to the casting process and cooling effect. The cylinder head has a water jacket to cool the heat generated in the combustion chamber and other mechanically operated parts for the engine to prevent the engine from overheating and to maintain the engine at a suitable temperature for optimum thermal efficiency. The use of a double-layer water jacket can well meet the effect of preferentially strengthening the cooling of the high-temperature area on the bottom surface of the cylinder head, but the casting pr...

AI Technical Summary

Problems solved by technology

The use of double-layer water jacket can satisfy the effect of preferential cooling in the high-temperature area of ​​the bottom surface of the cylinder head, but the casting process of the double-layer water jacket cylinder head also becomes more complicated.

The connection position of the upper and lower water jackets is prone to burrs during the casting process, and the high heat area of ​​the combustion chamber is prone to produce dead water flow, which does not meet the cooling requirements, resulting in cracking of the cylinder head, and even the scrapping of the entire engine

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