Patent ID: 6655329
Filing Date: 2003-12-02
Classification: F01L,F02B

Abstract:
A variable valve train for a cam-actuated lifting valve of an internal combustion engine, which valve is loaded by a closing spring acting against the direction of opening, with an approximately cylindrical force application element located between a cam and the valve, whose length can be adjusted hydraulically and whose exterior cylindrical wall face is slidable in a fixed guide cylinder, said element being provided with a pressure piston longitudinally slidable in a cylinder, which piston is adjacent to a pressure chamber into which opens a pressure channel departing from a port in the wall face of the force application element, a fixed pressure line opening into the guide cylinder in the area of the port, which line can be subjected to hydraulic high pressure permitting hydraulic activation of the valve, wherein a permanent flow connection is provided between pressure line and pressure channel independently of the position of the force application element.