Method and apparatus for controlling a hybrid powertrain system

Control method for a vehicular hybrid powertrain system including an engine and an electric machine selectively operatively coupled to a transmission device to transmit torque therebetween, the method comprising:

• monitoring operator inputs to an accelerator pedal and a transmission gear selector;
• determining an operator torque request based upon the operator inputs to the accelerator pedal and the transmission gear selector;
• commanding a torque output from the electric machine based upon the operator torque request;
• controlling engine output based upon the operator torque request and the commanded torque output from the electric machine;
• monitoring position of a vehicle hood;
• and
• controlling the engine output correlative to the operator input to the accelerator pedal when the monitored position of the vehicle hood is open and the operator input to the transmission gear selector is one of a PARK and a NEUTRAL position;
• controlling torque output from the electric machine when the monitored position of the vehicle hood is open and the transmission gear selector is in one of the PARK and the NEUTRAL positions;
• and
• controlling electric loading from the electric machine based upon an operator input to a brake pedal.

Control method for a hybrid powertrain system including an engine and an electric machine selectively operatively coupled to a transmission device to transmit torque therebetween and an electric energy storage device configured to transmit power to the electric machine, the method comprising:

• monitoring an accelerator pedal position and a transmission gear selector position;
• monitoring an input from a hood switch;
• and
• constraining a change in a state-of-charge of the electric energy storage device and controlling engine speed correlative to the accelerator pedal position when the input from the hood switch indicates the hood is open and the transmission gear selector is one of a PARK position and a NEUTRAL position;
• and
• controlling torque output from the electric machine when the monitored position of the vehicle hood is open and the transmission gear selector is in one of the PARK and the NEUTRAL positions;
• wherein controlling torque output from the electric machine comprises controlling torque output from the electric machine to zero torque.