Patent ID: 7967725
Filing Date: 2011-06-28
Classification: F16H,Y10T

Abstract:
1. A method for controlling a power assisted propulsion system ( 4 ) in a motor vehicle ( 1 ) so as to perform a transition from a lower gear to a higher gear without interrupting a driving torque applied to driving wheels ( 3 ); the propulsion system ( 4 ) comprises an internal combustion engine ( 5 ) provided with a drive shaft ( 6 ) and a power assisted transmission ( 7 ) comprising: a power assisted mechanical gearbox ( a power assisted clutch ( a power assisted brake ( an epicycloidal gear ( the control method comprises: opening the clutch ( disengaging the lower gear; engaging the higher gear; and closing the clutch ( determining an order of a desired value of driving torque to be applied to the driving wheels ( actuating the brake ( determining a value of the angular speed (ω driving the internal combustion engine ( releasing the brake ( wherein the epicycloidal gear ( 19 ) comprises a gear ratio ( 7 ) which varies as a function of an angular rotational speed of the second rotating element ( 21 ).