A device for changing the compression ratio of an automobile engine

Abstract

The invention discloses a device for changing automobile engine compression ratio, and aims to solve the problem of complex structure in the prior art. The device comprises a crankshaft, a first gear, four second gears, four third gears, a shaft, ten shaft seats, fourth to ninth gears, a sleeve and four rod journal sleeves, wherein the shaft 13 is fixedly to the lower part of the crankshaft through the ten shaft seats; the sleeve is sheathed on the right end of the shaft; the sleeve meshes with the sixth gear below the sleeve; the fourth to ninth gears are respectively sheathed on the shaft between every two adjacent shaft seats; the fourth gear and the shaft form a key connection; the other gears and the shaft form a rotating connection; the fourth gear, fifth gear, seventh gear, eighth gear and ninth gear sequentially mesh with the first gear and four third gears installed on the crankshaft; pinion gears of the four third gears sequentially mesh with the second gears which are installed on the outer end of each rod journal in the crankshaft; and the four rod journal sleeves are sheathed on the four rod journals in a key connection mode.

Description

Technical field [0001] The present invention relates to a variable compression ratio mechanism of an automobile engine. More specifically, the present invention relates to a device for changing the compression ratio of an automobile engine. Background technique [0002] When the engine is under low load, the ignition pressure is low and the thermal efficiency is low. At this time, a higher compression ratio is required. When the engine is under high load, if the preset compression of the engine is relatively large, it is easy to cause knocking. In order to solve these problems, a variable compression ratio engine came into being. Most of the engines put into production on the market currently have a fixed compression ratio, and in some variable compression ratio engines, it is generally used to move the cylinder head, use a height-adjustable piston, or design a set of linkage mechanisms. The movable cylinder head type has already formed products, and it is proved that the variab...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problem of complex structure existing in the prior art, and to provide a device for changing the compression ratio of the automobile engine

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