ENGINE VALVE DRIVER

摘要

An intermediate rocker member (10) is disposed between the rocker cam surfac e (9b) of a rocker member (9) and the rocker pressing surface (11b) of a rocke r arm (11), and moving an abutment point (c, c~) makes it possible to continuously adjust the valve opening period and the amount of lift, the rocker lever ratio (Lv/Lc) for a shorter valve opening period being set so that it is larger than the rocker lever ratio for a longer valve opening period.