Compression ratio self-adaptation system

Abstract

The invention relates to a compression ratio self-adaptation system and belongs to the technical field of an internal combustion engine. The compression ratio self-adaptation system comprises a cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, a volume cavity, a spring and moving elements, wherein the volume cavity is arranged in the piston; a first moving element is arranged at the left end of the lower part of the volume cavity; a second moving element is arranged at the right end of the lower part of the volume cavity; the first moving element and the second moving element are connected through the spring; outer wall surfaces of the first moving element and the second moving element are in sealing contact with the inner wall surfaces of the volume cavity; under a high-speed working condition, when pressure in a combustor is highest and combustion pressure is higher, the two moving elements are moved back to back and the volume of the combustor becomes big; under a low-speed working condition, when the pressure in the combustor is highest and the combustion pressure is lower, the two moving elements are moved face to face and the volume of the combustor becomes small. The compression ratio self-adaptation system is reasonable in structure, simple in design and fit for the optimal design for the engine compression ratio.

Description

technical field [0001] The invention belongs to a compression ratio design device in the technical field of internal combustion engines, in particular to a compression ratio adaptive system. Background technique [0002] The compression ratio refers to the degree to which the engine mixture is compressed, using the ratio of the total volume of the cylinder before compression to the volume of the cylinder after compression (that is, the volume of the combustion chamber). At present, the vast majority of automobiles use the so-called 'reciprocating engine'. Simply put, in the engine cylinder, there is a piston that reciprocates in a straight line and continues to cycle. There is a certain range of motion in the stroke. As far as a certain cylinder of the engine is concerned, when the stroke of the piston reaches the lowest point, the position at this time is called the bottom dead center. The volume formed by the entire cylinder including the combustion chamber is the maximum...

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Problems solved by technology

[0003] After searching the existing literature, it is found that the patent application number is 20092014360.5, and the name is a patented technology of a mechanism that can change the compression ratio of the engine. A variable compression ratio mechanism is proposed to make the combustion efficiency higher, but its compression ratio changes. Requires artificial control, cannot achieve self-regulation

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