ENGINE / ELECTRIC MOTOR TORQUE CONTROL FOR FILLING A TORQUE HOLE IN A HYBRID VEHICLE DURING SWITCHING OF AUTOMATIC GEARBOX

摘要

A vehicle includes an electric motor between an engine and a transmission, and a controller configured to control electric motor and engine torque during an upshift to produce a reserve torque during a preparation phase that is applied to the transmission during a torque phase. The controller increases engine torque for the reserve torque and reduces motor torque such that combined engine and motor torque meets driver demand torque without retarding the spark when available electric motor torque is insufficient to provide the reserve torque. A method of controlling a vehicle having an electric motor connected between an engine and a transmission includes increasing reserve torque motor torque applied during a torque upshift phase in response to available electric motor torque being insufficient to meet the reserve torque and reducing engine torque by retarding the spark only when combined engine torque and electric motor torque exceed driver demand torque after reducing electric motor torque to a minimum threshold.