Patent ID: 8347838
Filing Date: 2013-01-08
Classification: F01L

Abstract:
1. An internal combustion engine valve drive train switching device with a switching arrangement ( 36 ) including an actuating unit ( 38 ) with two switching units ( 1 , 2 ) and first and second switching means ( 3 , 4 ) for actuating the switching units ( 1 , 2 ), the switching units 1 , 2 each being provided with valve operating cams of different shapes for actuating valves of the internal combustion engine and being axially movably disposed on a camshaft ( 46 ) for rotation therewith, the switching units 1 , 2 forming jointly a sleeve but being axially movable also relative to each other and having guide means for engagement by the switching means ( 3 , 4 ) to be moved sequentially, first one of the switching units ( 1 , 2 ) for switching the valve operating cams of one cylinder valve and subsequently the other switching unit ( 1 , 2 ) for switching the valve operating cams of another cylinder valve with a chronological offset.