CONTROL SYSTEM, CONTROLLER AND CONTROL METHOD FOR HYBRID VEHICLE

摘要

In a hybrid vehicle including an engine, motor generators, a purifier having a purification catalyst for reducing toxic substances contained in exhaust gas from the engine, output from the engine is controlled in accordance with the amount of the toxic substances contained in the exhaust gas from the engine, and target engine output is controlled on the basis of a warm up state of the engine and purification capability of the purifier, so that the amount of the toxic substances contained in the exhaust gas discharged from the purifier becomes less than a predetermined value.

主权项

1. A control system for a hybrid vehicle, the control system comprising:
an engine configured to output power for traveling; a motor configured to output power for traveling; a secondary battery configured to supply power to the motor; a purifier having a purification catalyst for reducing toxic substances contained in exhaust gas from the engine; and an electronic control unit configured to: determine a target engine output based on a warm up degree of the engine and a purification capability of the purifier when a warm up operation for the purification catalyst starts; (i) maintain the target engine output constant during a warm up operation for the purification catalyst, (ii) control the target engine output based on the warm up degree of the engine and the purification capability of the purifier, so that an amount of the toxic substances contained in the exhaust gas discharged from the purifier becomes less than a predetermined value, and (iii) determine the target engine output based on a required power when the warm up degree of the engine and the purification capability of the purifier have reached or exceeded a respective predetermined value.