Patent ID: 7353789
Filing Date: 2008-04-08
Classification: F01L,F16H

Abstract:
1. An angular camshaft position adjustment drive mechanism for adjusting a phase position of a camshaft ( 40 , 40 a , 40 b ) in relation to a crankshaft of an internal combustion engine, comprising a drive gear ( 10 , 10 a , 10 b ), driven by the crankshaft for driving the camshaft ( 40 , 40 a , 40 b ), a four-shaft transmission in the form of an epicyclic summing gear train disposed in a housing ( 19 , 19 a , 19 b ), from which four shafts ( 10 , 10 a , 10 b , 20 , 20 a , 20 b , 30 , 30 a , 30 b , 40 , 40 a , 40 b ) extend, said drive gear ( 10 , 10 a , 10 b ), forming a drive input, first and second control shafts ( 20 , 20 a , 20 b , 30 , 30 a , 30 b ) forming second and third inputs, and the fourth shaft ( 40 , 40 a , 40 b ) forming a transmission output connected to said camshaft ( 40 , 40 a , 40 b ), said two control shafts ( 20 , 20 a , 20 b , 30 , 30 a , 30 b ) adapted to the simultaneous subjection to a brake torque, said control shafts ( 20 , 20 a , 20 b , 30 , 30 a , 30 b ) being coaxial for connection to coaxial shafts of a control motor, one control input shaft running freely or being more lightly braked than the other control input shaft for an adjustment of the phase position of the camshaft relative to the crankshaft.