Patent ID: 8070647
Filing Date: 2011-12-06
Classification: B60K,B60L,B60W,Y02T,Y10T

Abstract:
1. Method for controlling a powertrain comprising an engine coupled to an input member of a hybrid transmission, the hybrid transmission operative to transfer power between the input member and a plurality of torque machines and an output member, the method comprising: monitoring operation of the hybrid transmission; determining motor torque offsets for the torque machines, said motor torque offsets for the torque machines comprising closed-loop motor torque offsets effecting closed-loop correction torque based upon an input speed error of the input member and motor torque offsets effecting active damping of a driveline operatively connected to the output member, said input speed error comprising a difference between a measured input speed of the input member provided by the engine and an input speed profile comprising an estimate of an upcoming input speed; transforming the motor torque offsets for the torque machines to an input torque offset and an output torque offset of the hybrid transmission, said transforming comprising a linear transformation based on a time rate of change in an input speed of the input member provided by the engine; and adjusting operation of the engine based upon the input torque offset and the output torque offset of the hybrid transmission.