Patent ID: 8160763
Filing Date: 2012-04-17
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. Method for controlling a powertrain system including an engine and a hybrid transmission configured to propel a land vehicle, comprising: monitoring a speed of the vehicle; determining an actual direction of vehicle travel as one of a first direction and a second direction; monitoring operator inputs to a brake pedal and an accelerator pedal; monitoring a position of a transmission range selector to determine an operator-selected direction of vehicle travel as one of the first direction and the second direction; operating the hybrid powertrain in a creep torque mode at a preferred output torque when the operator input to the accelerator pedal is zero and the magnitude of speed of the vehicle is less than a predetermined threshold, the creep torque mode including controlling a torque machine of the hybrid powertrain to generate tractive torque responsive to the preferred output torque.