Patent ID: 7651440
Filing Date: 2010-01-26
Classification: B60W,F16H,Y02T,Y10T

Abstract:
1. A method of controlling torque of an engine operatively connected to an automatically shiftable transmission during shifting of the automatically shiftable transmission, the method comprising: determining an engine output torque command value; commanding an output torque of the engine in a ramp-like or sloping torque reduction to said engine output torque command value during shifting of the automatically shiftable transmission, wherein the shifting of the automatically shiftable transmission includes the engagement of an on-coming clutch; wherein the on-coming clutch engagement includes an inertial phase where the on-coming clutch gains capacity; commanding said ramp-like or sloping torque reduction to end substantially at the initiation of the inertial phase; and commanding said output torque of the engine to increase after the shifting has occurred.