Patent ID: 7748214

Claim:
An exhaust gas purification system for a hybrid vehicle comprising: an internal combustion engine and an electric motor each arranged for providing power output for the vehicle, an exhaust gas purification device disposed in an exhaust passage of the engine to treat exhaust gas components contained in exhaust gas from the engine, a controller arranged and configured to selectively perform a regeneration operation of the exhaust gas purification device to burn and remove deposits accumulated in the exhaust gas purification device, and the controller further arranged and configured to control the engine and the electric motor such that the exhaust gas purification device is restrained from reaching an excessive temperature during the regeneration operation of the exhaust gas purification device, a section to determine the excessive temperature of the exhaust gas purification device, and wherein when the excessive temperature of the exhaust gas purification device is detected during the regeneration operation, the engine is controlled to increase the power output with a rich air-fuel ratio operation and an excess power output caused by the increase in the power output of the engine is used to generate electric power by the electric motor.