| 摘要 |
PURPOSE:To secure the optimum valve opening or closing timing of a suction- exhaust valve, by interposing a roller capable of altering a contact position with a cam, in space between the cam and an intermediate member which drives a valve, while altering the valve opening or closing timing according to the load. CONSTITUTION:Each of rollers 26 and 27 capable of altering a contact position with a cam 10 is installed in place between the cam 10 which drives a valve for its opening or closing and an intermediate member such as a push rod or the like. Each of these roller 26 and 27 is energized to go in one direction by dint of a spring 31 and installed movably in position upon leading the way by a guide 32. A shifting range is limited by a stopper 33 to be shifted according to the load. The contact position with the cam is constant in time of high load but set so as to accelerate the valve opening or closing timing in time of low load. |
