CONTROL MODULE AND CONTROL METHOD FOR A VEHICLE POWERTRAIN

Aspects of the present invention relate to a control module () for a vehicle powertrain. The powertrain comprises a transmission (), an engine () and an electric machine (). The control module () is configured to receive an input indicative of a requested upshift and in response to the received signal the control module () increases the torque output of the engine () prior to the start of the torque phase (). As the torque output of the engine () increases the control module () decreases the torque output of the electric machine () such that a constant wheel torque is applied to the wheels () during the torque phase () of the upshift.