Completely-variable five-section valve gear for internal combustion engine, includes guide rocker, moving connection adjuster, control pawl and cam track

摘要

An intermediate section formed by a rocker lever (3) has a cam-actuated contact surface (3g). On one side of the pivotal axis (C3) it has a guide rocker (3a). On the other side of the axis is a control pawl (3b). The guide rocker is pivotally connected to the adjuster (2) at the end remote from the axis. The adjuster varies the position of the moving connection. The control pawl (3b) is supported at the end facing away from the axis (C3) by a support roller (3h) on a center (C3a) or by a circular sliding surface with a center (C3a) on a cam track (4a) fixed to the casing. The cam track form is a circular curve. When the valve has come to rest, this lies concentric with the center of rotation (C5) of the roller of the valve operating section (5). This roller is in driven connection with a control curve (3f) of the control pawl (3b). The curve (3f) transitions from a valve dwell section (3c) describing a radial contour about the center (C3a), through a run-on ramp (3d) which departs from he radial contour, into a lifting section (3e).