Powertrain torque control based on torque observer

To reduce shock during transmission gear shift, a transmission torque feedback closed-loop control system is proposed based on the powertrain system model and a torque observer. The ignition time of engine was delayed to reduce transmission output shaft torque during gear shift. In contrast to traditional control method, the closed-loop control system based on torque observer can obviously reduce the transmission output shaft torque during gear shift. It can be concluded that by way of torque feedback closed-loop control, transmission shift shock can be reduced.