Patent ID: 8230837

Claim:
A valve drive train actuating device for an internal combustion engine having at least one firing camshaft ( 10 ), including a firing camshaft adjusting device ( 11 ) for phase-shifting the firing camshaft ( 10 ) in relation to a crankshaft ( 12 ) driving the firing camshaft ( 10 ), a decompression brake device ( 13 ) comprising at least one brake cam ( 14 ) and at least one decompression valve ( 15 ) with a decompression valve drive for engine braking operation, and an adjusting device ( 16 ) for adjusting the decompression valve drive for controlling an actuating point of time of the decompression valve ( 15 ) in such a way that, with a decreasing speed of the crankshaft ( 12 ), the brake cam actuating point of time is displaced in the direction toward an upper dead center position ( 23 ) of the crankshaft.