A kind of free piston internal combustion engine and internal combustion generator

Abstract

The invention relates to the technical field of internal combustion engines, in particular to a free piston type internal combustion engine and an internal combustion engine generator. The position of a lower dead center in the piston reciprocating motion process can be limited, and therefore the compression ratio of the internal combustion engine is relatively stable. The defects that in the prior art, the motion rule of a piston is determined by pressure of gas in a cylinder, consequently, the compression ratio of an internal combustion engine is unstable, and operating is unstable are overcome. The free piston type internal combustion engine comprises a cylinder, the cylinder comprises a cylinder body, a piston arranged in the cylinder body, and a piston rod fixedly connected with the lower end face of the piston. A limiting component is further arranged in the cylinder body and used for limiting the lower dead center of the piston.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a free-piston internal combustion engine and an internal combustion generator. Background technique [0002] Most of the prime movers used in existing internal combustion unit generators and distributed energy systems use four-stroke reciprocating internal combustion engines. This type of internal combustion engine has complex structure, large volume, large noise and vibration, single fuel, and short service life. It is difficult to meet the needs of generators and Distributed energy system miniaturization and environmental friendliness requirements. [0003] In order to meet the requirements of model miniaturization and fuel diversification, the existing free-piston internal combustion engine is composed of cylinders at left and right ends, pistons, intake passages, exhaust ports, etc. The internal combustion engine is used to convert the energy of combustion...

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Problems solved by technology

[0002] Most of the prime movers used in existing internal combustion unit generators and distributed energy systems use four-stroke reciprocating internal combustion engines. This type of internal combustion engine has complex structure, large volume, large noise and vibration, single fuel, and short service life. It is difficult to meet the needs of generators and Demand for miniaturization and environmental friendliness of distributed energy systems

[0003] In order to meet the requirements of model miniaturization and fuel diversification, the existing free-piston internal combustion engine is composed of cylinders at left and right ends, pistons, intake passages, exhaust ports, etc. The internal combustion engine is used to convert the energy of combustion into reciprocating The kinetic energy of the movement, the movement law of the piston of the free-piston internal combustion engine is determined by the pressure of the gas in the cylinder, which makes the compression ratio of the internal combustion engine unstable, resulting in unstable operation of the internal combustion engine, and even misfire or knocking.

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