Piston rod assembly of engine and engine having the same

Abstract

The invention discloses a piston connection rod assembly of an engine and the engine with he same. The piston connection rod assembly comprises a piston, a piston pin, a connection rod, a sliding block, a spring and a pressure-relief valve, wherein containing space is limited in the piston, and an oil cavity is formed in the containing space; the piston pin can be contained in the containing space in a vertical moving mode, and an oil channel is formed in the piston pin; the connection rod is sleeved on the piston pin and provided with an oil inlet port communicated with the oil channel; the sliding block is sleeved on the piston pin and positioned in the containing space, and a sliding block oil channel communicated with the oil channel and the oil cavity is arranged in the sliding block; the spring abuts against the position between the inner wall of the containing space and the side of the lateral wall opposite to the sliding block oil channel of the sliding block; the pressure-relief valve is arranged on at least one of the piston pin and the piston. By means of the piston connection rod assembly, the position of the piston relative to the connection rod can be changed, the volume of a combustion chamber of the engine is changed, and the purpose of regulating the compression ratio is achieved.

Description

Technical field [0001] The invention relates to the field of vehicles, and in particular to a piston connecting rod assembly of an engine and an engine having the same. Background technique [0002] Traditional engines generally use immutable piston pin holes to achieve the purpose of transmitting the gas pressure generated in the combustion chamber. Under normal circumstances, the temperature and pressure of the mixture required to achieve the highest thermal efficiency of the engine are different at different speeds and different loads. Therefore, different compression ratios are required during the entire operation of the engine. [0003] The traditional piston has a simple structure and only has the function of transmitting the gas pressure in the combustion chamber, and does not have the function of achieving a variable compression ratio. In the entire operating range of the engine, the required compression ratio is different, which cannot be met by traditional piston pins. ...

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