Control system of hybrid vehicle

A control system of a vehicle, the vehicle including an internal combustion engine and a motor-generator as power sources for running the vehicle, and the motor-generator or a generator connected to an output shaft of the internal combustion engine such that power of the motor-generator or the generator can be transmitted to the output shaft, the control system comprising:

• a controller configured to:
• i) start the internal combustion engine when required vehicle output as output power required of the vehicle becomes equal to or larger than a predetermined start threshold value,
• ii) stop the internal combustion engine when the required vehicle output becomes equal to or smaller than a predetermined stop threshold value that is smaller than the predetermined start threshold value, and
• iii) cause the internal combustion engine to generate output power that is equal to or larger than a predetermined output lower-limit value from the internal combustion engine, during a period from a time when the required vehicle output becomes equal to or larger than the predetermined start threshold value, to a time when the required vehicle output becomes equal to or smaller than the predetermined stop threshold value, the predetermined output lower-limit value being output power that is larger than the predetermined stop threshold value.