Hybrid vehicle control system

A hybrid vehicle control system configured to perform a control of a hybrid vehicle comprising an engine, an electric motor, a driving wheel, a clutch, and a continuously variable transmission, the hybrid vehicle control system comprising:

• a transmission control unit configured to control the continuously variable transmission, the continuously variable transmission comprising a primary pulley, a secondary pulley, and a driving force transmission member, the primary pulley being coupled to each of the engine and the electric motor to allow for torque transmission between the primary pulley and each of the engine and the electric motor, the secondary pulley being coupled to the driving wheel to allow for torque transmission between the secondary pulley and the driving wheel, the driving force transmission member being wrapped around between the primary pulley and the secondary pulley;
• a motor control unit configured to control the electric motor;
• and
• an engine and hybrid vehicle integrated control unit communicably coupled to each of the transmission control unit and the motor control unit via a communication network, and configured to comprehensively control the engine and the hybrid vehicle, wherein
• the transmission control unit is configured to send sudden deceleration determination permission information when a predetermined permission condition is satisfied at a time of electric vehicle traveling in which the engine is stopped, the clutch is disengaged, and the hybrid vehicle is driven by the electric motor, the clutch being interposed between the engine and the continuously variable transmission, and
• the motor control unit is configured to perform a sudden deceleration determination of the hybrid vehicle when receiving the sudden deceleration determination permission information, and is configured to perform reduction of output torque of the electric motor when determining occurrence of sudden deceleration.