Control systems for a vehicle powertrain

A control system for controlling a powertrain of a vehicle, the powertrain comprising a power source and a drivetrain arranged to receive torque from the power source, the drivetrain comprising a gearbox, the control system comprising one or more processors, the one or more processors being collectively configured to:

• receive a gear change signal indicative of an expected upshift in the gearbox,
• receive a predicted torque demand signal, the predicted torque demand signal containing information indicative of a predicted post-upshift torque demand;
• receive a current torque demand signal, the current torque demand signal containing information indicative of a current torque demand;
• determine, in dependence on the predicted torque demand and the current torque demand, a difference between the predicted post-upshift torque demand and the current torque demand;
• and
• output a first output signal, the first output signal being arranged to cause a change in torque generated by the power source in dependence on the determined difference and the gear change signal.