A vehicle and its engine

Abstract

The invention discloses an engine. The engine comprises a piston, a connecting rod and a piston pin used for connecting the piston with the connecting rod. The piston pin and the piston are tightly matched through a pin sleeve. The inner circle and the outer circle of the pin sleeve are provided with eccentric structures in order to adjust the relative positions of the piston pin and the piston through rotating of the pin sleeve. According to the engine, by arranging the pin sleeve to be of an eccentric structure, when the pin sleeve is at different angles, an inner hole of the pin sleeve is changed relative to the distance of the top surface of the piston, the total length of the piston and the connecting rod is changed, the movement position of the piston in a cylinder is changed, the combustion chamber volume is adjusted, because the engine displacement is unchanged, the compression ratio of the engine is adjusted along with rotation of the pin sleeve; and according to the engine, the fact that the compression ratio can be adjusted is achieved, meanwhile, the fact that eccentricity of the piston is adjustable is realized, according to different operating conditions, piston stress is adjusted, and the reliability of the piston is improved. The invention further discloses a vehicle comprising the engine.

Description

technical field [0001] The invention relates to the field of engine equipment, in particular to an engine. Furthermore, the present invention also relates to a vehicle comprising the above-mentioned engine. Background technique [0002] The compression ratio is an important performance index of the engine. The higher the compression ratio of the engine, the higher the thermal efficiency. However, as the compression ratio increases, the engine will produce knocking, which will reduce the output of the engine and cause damage to the engine. [0003] In the prior art, the engine usually has a fixed compression ratio. Due to the limitation of knocking, the compression ratio cannot be increased, resulting in different thermal efficiency of the engine under different working conditions. When the load of the engine is lower, the thermal efficiency is lower, and the engine The higher the load, the higher the thermal efficiency. Therefore, when the engine is under low load, thermal...

AI Technical Summary

Problems solved by technology

[0002] The compression ratio is an important performance index of the engine. The higher the compression ratio of the engine, the higher the thermal efficiency. However, as the compression ratio increases, the engine will produce knocking, which will reduce the output of the engine and cause damage to the engine.

[0003] In the prior art, the engine usually has a fixed compression ratio. Due to the limitation of knocking, the compression ratio cannot be increased, resulting in different thermal efficiency of the engine under different working conditions. When the load of the engine is lower, the thermal efficiency is lower, and the engine The higher the load, the higher the thermal efficiency

Therefore, when the engine is under low load, the thermal efficiency decreases, resulting in poor engine economy

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