Patent ID: 8226525
Filing Date: 2012-07-24
Classification: B60L,B60W,Y02T,Y10T

Abstract:
1. A hybrid powertrain comprising: an engine having a crankshaft; a hybrid transmission having an input member, an output member, and at least one motor/generator operable to provide or receive torque; a damper connecting the crankshaft with the input member; a bi-directional rotational position sensing system operatively connected with the crankshaft, and configured to sense the rotational position and direction of the crankshaft and provide a position signal indicative thereof; and at least one controller configured to receive the position signal and to provide a torque command to the motor/generator based at least in part on the position signal and operable to cause the motor/generator to substantially cancel an expected engine torque pulse associated with the sensed rotational position during starting of the engine with the damper open.