Means for the actuation of valves on a reciprocating engine with a variable valve lift, in particular a reciprocating internal combustion engine

摘要

A device for actuating valves of a reciprocating engine, such as a reciprocating internal combustion engine, includes a lever arrangement having a cam lever and having an adjustment device for adjusting an idle stroke in relation to the valves; a control shaft on which the cam lever is positioned and which can be turned back and forth relative to the lever arrangement so that the adjustment device is actuated; at least one camshaft each having a respective cam which acts upon the lever arrangement to actuate at least one valve, wherein the cam lever is positioned pivotally on the control shaft, in contact with at least one cam on one side thereof, and in contact with the at least one valve to be actuated on another side thereof, wherein the control shaft has a pressure medium channel for supplying a fluid medium defined therein, wherein the control shaft has a cross bore defined therein in communication with the pressure medium channel, and wherein the adjustment device is an hydraulic adjustment device including a pressure cylinder provided in the lever arrangement, a transmission element that moves as a piston within the pressure cylinder and acts on the valve, and a feed channel in communication with the pressure cylinder at one end thereof and connectable via the cross bore in the control shaft with the pressure medium channel by turning the control shaft.