Abstract: An emissions control technique for a mild hybrid electric vehicles (MHEV) includes determining a constant torque level to be generated by an engine for optimal heating of a catalyst to a light-off temperature, controlling the engine to maintain the constant torque level when an electric traction motor is capable of satisfying a driver torque request, wherein the electric traction motor is connected to a driveline of the MHEV and is temporarily disconnected from the engine, and when the electric traction motor is incapable of satisfying the driver torque request, controlling the engine to temporarily increase or decrease its torque output from the constant torque level to assist the electric traction motor in satisfying the driver torque request.

Abstract: A mild hybrid electric vehicle includes an engine; a low voltage electric starter/generator motor of a belt-driven starter/generator (BSG) unit connected to a crankshaft of the engine, wherein the electric starter/generator motor is powered by a low voltage battery system; a hybrid dual clutch transmission (DCT) coupled to an output of the engine, wherein the DCT includes an electric traction motor; and a control system configured to control the engine, the dual clutch hybrid transmission and the electric traction motor to charge the high voltage battery system while the vehicle is in a standstill condition or a neutral gear state and the low voltage motor of the BSG unit is not used to charge the high voltage battery.

Abstract: A hybrid electric vehicle (HEV) includes an internal combustion engine, an electric traction motor, a motor/generator, and a transmission. A launch control system includes a controller having one or more processors programmed to (A) operate the HEV in a vehicle launch preparation phase while the HEV is at a standstill, including (i) commanding the internal combustion engine to an engine speed launch target, (ii) performing a spark retardation on the internal combustion engine to limit wheel torque and generate an engine airflow torque reserve, and (iii) commanding zero torque to the electric traction motor; and (B) operate the HEV in a vehicle launch phase, including (i) reducing or removing the spark retardation, and (ii) commanding the electric traction motor to operate at a predetermined torque, to thereby utilize the engine airflow torque reserve in combination with the electric traction motor to provide increased vehicle acceleration.