A piston rod assembly, engine and vehicle

Abstract

The invention discloses a piston connecting rod assembly, an engine and a vehicle, belonging to the technical field of engines. The piston connecting rod assembly includes a piston assembly, a piston pin assembly, a connecting rod body and a direction conversion mechanism. The first conveying channel in the connecting rod body is connected with the sliding cavity in the piston pin body. The pressure medium in the first conveying channel is injected into the sliding cavity and pushes the booster pin to move, and the booster pin is in contact with one end of the direction conversion mechanism. Then, through the direction conversion mechanism, the sliding of the booster pin in the first direction is converted into the telescopic motion of the telescopic piece in the second direction, the distance between the inner piston and the outer piston is changed, and the length of the integral piston connecting rod assembly can be changed to achieve The compression ratio of the engine is variable, which can improve thermal efficiency while avoiding the occurrence of knocking, taking into account the fuel economy and power performance of the engine.

Description

technical field [0001] The present invention relates to the technical field of engines, and in particular, to a piston connecting rod assembly, an engine and a vehicle. Background technique [0002] At present, the compression ratio of mainstream gasoline engines on the market is constant. Increasing the compression ratio within a certain range can improve the thermal efficiency under partial load and improve fuel economy. However, if the compression ratio is too high, there is a risk of knocking in the high-load area, and the knocking will be serious. Affect the normal operation of the engine, and even lead to the direct scrapping of the engine. [0003] Therefore, there is an urgent need to provide a piston connecting rod assembly to solve the above problems. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a piston connecting rod assembly, which makes the compression ratio of the engine variable, improves thermal efficiency while avo...

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Problems solved by technology

[0002] At present, the compression ratio of mainstream gasoline engines on the market is constant. Increasing the compression ratio within a certain range can improve the thermal efficiency under partial load and improve fuel economy. However, if the compression ratio is too high, there is a risk of knocking in the high-load area, and the knocking will be serious. Affect the normal operation of the engine, and even cause the engine to be scrapped directly

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