Valve train for an internal combustion engine

Abstract

A valve train for an internal combustion engine is provided, with the valve train having a switchable rocker arm assembly () with a plurality of rocker arms () for activating at least one gas exchange valve (), and also having at least one camshaft () with differently contoured cams () through which different adjusting displacements can be imparted to individual rocker arms of the rocker arm assembly (). The assembly further includes a switching device () for selectively activating the rocker arms for driving the gas exchange valve () with a varying valve lift. To create a valve train in which individual gas exchange valves can be operated in different modes of operation with only a small amount of construction work and expense, the rocker arm assembly () has a stationary rocker arm shaft () on which at least two outer rocker arms (), that are in continuous contact with associated, differently contoured cams (), and a center rocker arm () with a lever arm extension () through which the gas exchange valve (), in operative connection to one of the two outer rocker arms (), can be selectively actuated, are mounted for tilting movement. Actuatable locking pins () are arranged on the outer rocker arms () for sliding axially parallel to the rocker arm shaft (), a locking pin receiver () is arranged on the center rocker arm () and positioning aids () are arranged on the outer and the center rocker arms (), so that the center rocker arm () can be selectively force-locked to one of the two outer rocker arms () or be deactivated.