Gas engine piston

Abstract

The invention discloses a gas engine piston. The gas engine piston comprises a piston head part adopting a steel structure, and a piston skirt part, wherein a combustion chamber at the top of the piston head part is in a straight barrel shape; the bottom of the piston head part is provided with an arc protrusion; the bottom of the piston head part is provided with a cooling oil upper cavity; a plurality of cooling oil holes communicating with the cooling oil upper cavity are uniformly formed in the inner edge of the piston head part in the circumferential direction; the upper portion of the piston skirt part is provided with a cooling oil lower cavity used for being matched with the cooling oil upper cavity of the piston head part to form a complete cooling oil cavity; the middle of the cooling oil lower cavity is provided with a cooling oil inlet and a cooling oil return hole; and a plurality of cooling oil hole oil return grooves are radially formed in the circumferential side of thecooling oil return hole. The gas engine piston adopts a steel top and an aluminum skirt, the flow squeezing speed can be increased, the burning speed is increased, the ignition delay period is shortened, the burst pressure of the whole engine is greatly increased, fuel consumption and harmful emissions are reduced, and the thermal efficiency of the whole engine is improved.

Description

technical field [0001] The invention relates to the field of engines, in particular to a gas engine piston. Background technique [0002] High power density and thermal efficiency are important indicators pursued by gas engines, and increasing explosion pressure is an effective way to increase the power density and effective thermal efficiency of gas engines. However, with the continuous improvement of the compression ratio of gas engines, and the application of technologies such as turbocharging, intercooling technology, and high-energy ignition, the explosion pressure in the combustion chamber of gas engines is higher and the combustion temperature is higher. Demand for burst pressure and high temperature performance. [0003] At present, most gas engines adopt the aluminum piston scheme, but as the explosion pressure in the combustion chamber continues to increase, especially when a higher compression ratio is selected, the traditional aluminum piston is difficult to wit...

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of the compression ratio of gas engines, and the application of technologies such as turbocharging, intercooling technology, and high-energy ignition, the explosion pressure in the combustion chamber of gas engines is higher and the combustion temperature is higher. Demand for burst pressure and high temperature resistance

[0003] At present, most gas engines adopt the aluminum piston scheme, but as the explosion pressure in the combustion chamber continues to increase, especially when a higher compression ratio is selected, the traditional aluminum piston is difficult to withstand the impact of the explosion pressure, which may easily lead to cracking failures

[0004] In addition, as the combustion temperature rises, the traditional aluminum piston is difficult to meet the requirements, and the failure of the piston top melting is prone to occur, resulting in damage to the engine and making it unusable

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