Movable multipart piston device

Abstract

The invention relates to a movable multipart piston device belonging to the technical field of an internal combustion engine. The movable multipart piston device comprises an air cylinder, a cylinder cover, a piston, a piston ring, a connecting rod, a volume cavity, a spring and movable bodies, wherein the volume cavity is formed in the top of the piston, the movable bodies are all distributed in the volume cavity, a first movable body is arranged above a second movable body, a third movable body is arranged above a fourth movable body, and the lower end surface of the first movable body, the upper end surface of the second movable body, the lower end surface of the third movable body and the upper end surface of the fourth movable body are respectively of a slope structure. Under a high speed working condition, when pressure in a combustion chamber is highest and the combustion pressure is relatively high, the second movable body moves rightwards, the fourth movable body moves leftwards, and the volume of the combustion chamber is increased; under the low speed working condition, when the pressure in the combustion chamber is highest and the combustion pressure is relatively small, the second movable body moves leftwards, the fourth movable body moves rightwards, and the volume of the combustion chamber is reduced. The movable multipart piston device is reasonable in structure, simple in design and applicable to the optimized design of an engine piston.

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 multi-part movable piston device. 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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