Operating arrangement for internal combustion engine poppet valves and the like.

摘要

A first rocker arm (101) is used to induce valve lift while a second one (102) used to move the valve back to closed position. The rocker arms are arranged to engage the valve top or retainer (114) surfaces at locations offset from the axis of the valve and to induce the valve to rotate during the lift and closing operations. Springs, hydraulic lifters or double adjust screw type arrangements are used to control clearances.