Engine with adjustable compression ratio

Abstract

The invention discloses an engine with adjustable compression ratio, comprising a cylinder, a piston arranged in the cylinder and an upper connecting rod of which the upper end socket is articulated with the piston pin and the lower end socket is articulated with the eccentric pin; the eccentric pin is integrally formed with a first pin which is fixedly connected with one or two auxiliary driving wheels; the auxiliary driving wheels are coaxial with the first pin and are provided with an oscillating bar; one end of the oscillating bar is articulated on the first pin, and the other end is supported on a second pin on the engine cylinder and is coaxially connected with one or two active driving wheels which are parallel to the auxiliary driving wheels and rotate under control; the active driving wheels drive the auxiliary driving wheels to rotate; the middle part of the oscillating bar is provided with articulating points and is articulated with a lower connecting rod which is connected with a crank. The engine has low height of the complete machine of the engine, good rigidity of the crankshaft, long service life, low cost, good dynamic property, simple and convenient adjustment of compression ratio, great output low speed torque, high power, little fuel consumption and low discharge pollution.

Description

technical field [0001] The invention relates to an engine. In particular, it relates to an adjustable compression ratio engine that can maintain the height of a conventional engine and has better crankshaft stiffness characteristics. Background technique [0002] The traditional reciprocating piston internal combustion engine is limited by the structure of the crank connecting rod mechanism, and the compression ratio cannot be adjusted, which limits the improvement of its performance. Along with technical progress, the application number EP-0292603 has appeared successively, such as figure 1 adjustable compression ratio internal combustion engine, and the application number is 2007100567958, such as figure 2 A variable compression ratio internal combustion engine is shown. [0003] Wherein the application number is 2007100567958. The engine piston of the adjustable compression ratio internal combustion engine is connected with the crank through the upper and lower connec...

AI Technical Summary

Problems solved by technology

But its shortcoming is firstly that because the mechanism uses the structure of the upper and lower connecting rods and the swing rod, limited by the body structure and the transmission conditions of the crank slider mechanism, the lower connecting rod cannot be too short, so the height of the engine has to be increased. The weight and size of the engine are significantly increased, and the cost is increased; secondly, because the engine crankshaft is arranged near the centerline of the cylinder, the crank length is large and the rigidity is poor; these factors greatly limit its practical application

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