Control system for hybrid vehicle

A control system for a hybrid vehicle, comprising:

• an engine;
• an output member transmitting power to drive wheels;
• a motor having a generating function;
• and
• a power split device that distributes output torque of the engine to the output member and the motor;
• wherein the power split device includes an input element connected to the engine, a reaction element connected the motor, and an output element connected to the output member,
• wherein the motor generates a reaction torque against the output torque of the engine generated based on a required engine torque when accelerating the vehicle so as to deliver the output torque of the engine to the drive wheels, and
• wherein the control system comprises a controller, the controller including microcomputer for executing programs stored in memory thereof, the controller is configured to:
• calculate the output torque of the engine by adding an inertia torque of the engine that is required to increase an engine speed to the required engine torque when accelerating the vehicle, and wherein the output torque of the engine is further calculated by adding the inertia torque of the engine to the required engine torque, when the inertia torque of the engine is greater than a predetermined threshold value, and when accelerating the vehicle;
• output the calculated output torque of the engine by the engine;
• and
• output the reaction torque against the required engine torque.