Research on a new type of multi-link variable compression ratio engine

This paper researched an all new designed multi link and variable compression ratio single cylinder engine. Compare the kinematics function with the new design with the prototype 250 engine and the traditional multi-link and variable compression ratio mechanism by using the virtual simulation software MSC-Adams. The contrast result suggested that the new design had higher combustion efficiency and charging efficiency than the prototype engine, however, because of the molar increase with the multi-link design, the balance of the new engine became worse. Compared with the traditional multi-link and variable compression ratio mechanism, the new engine had compact styling and lower designed costs. And the new engine could adjust the compression ratio more widely and had the better kinematics than the traditional VCR design.