Pressure ratio adjustable engine

Abstract

The invention discloses a pressure-ratio adjustable engine, which comprises at least one cylinder, a piston connected with a crank via upper and lower connecting rods, and one or two swing rods. The lower end of the upper connecting rod that connected with the piston and the upper end of the lower connecting rod that connected with the crank are hinged via an eccentric pin fixed with one or two auxiliary driving wheels, the central line of the pin is eccentrically arranged with the central line of the lower end of the upper connecting rod or the upper end of the lower connecting rod, one end of the swing rod is connected with the eccentric pin while another end is hinged on the cylinder, the hinge axle is disposed with one or two active driving wheels with controllable rotation, and the active driving wheel is rotationally engaged with the auxiliary driving wheel. The invention can real-time adjust the pressure ratio of the engine to assure the engine works in high thermal efficiency, improve fuel efficiency and reduce pollution.

Description

technical field [0001] The invention relates to an improvement of an internal combustion engine, in particular to an engine with adjustable pressure ratio. Background technique [0002] The traditional reciprocating piston internal combustion engine is limited by the structure of the crank connecting rod mechanism, and the pressure ratio cannot be adjusted, which limits the improvement of its performance. Along with technological progress, there has been a piston internal combustion engine as reported in (EP-0292603) patent, and its structure is as shown in Figure 1. Its characteristics are: the piston is connected with the crank by the upper and lower connecting rods, the end point of the upper connecting rod extending outward from the hinge of the upper and lower connecting rods is hinged with a swing rod, and the other end of the swing rod is supported on the eccentric block of the engine block . But its shortcomings are firstly that when the eccentric block rotates, on...

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Problems solved by technology

But its shortcomings are firstly that when the eccentric block rotates, only the angle between the upper and lower connecting rods is changed, which has little effect on the piston position, and the pressure ratio change is too small; secondly, the dynamic performance of the engine is obvious when the eccentric block rotates. change, so the patent specification does not state any advantages and applications in this regard

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