Control system for vehicle

A control system for a vehicle having at least two torque devices each of which applies a torque to a predetermined rotary member, comprising:

• a controller that controls a synthesized torque of the torques generated by the torque devices to adjust a speed of the predetermined rotary member to a target speed,
• wherein the controller is configured to
• calculate a target amount of change in the synthesized torque required to reduce a difference between an actual speed and the target speed of the predetermined rotary member,
• calculate an amount of change in the torque applied to the predetermined rotary member by one of the torque devices, in accordance with operating conditions of the torque devices when reducing the difference between the actual speed and the target speed of the predetermined rotary member, and
• calculate an amount of change in the torque applied to the predetermined rotary member by another one of the torque devices, based on the target amount of change in the synthesized torque and the amount of change in the torque applied to the predetermined rotary member by said one of the torque devices,
• wherein the vehicle further comprises an engine and a motor connected to the predetermined rotary member respectively to apply the torque to the predetermined rotary member,
• the torque devices include the engine and the motor,
• the controller is further configured to
• select the motor as said one of the torque devices and select the engine as said another one of the torque devices, if a response of the torque of the motor is faster than a response of the torque of the engine, and
• select the engine as said one of the torque devices and select the motor as said another one of the torque devices, if the response of the torque of the engine is faster than the response of the torque of the motor.