FUEL INJECTION CONTROLLER FOR INTERNAL COMBUSTION ENGINE FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To prevent worsening of exhaust property when restarting an engine and reduce and eliminate NOx stored by NOx storage reduction catalyst efficiently.

SOLUTION: NOx storage reduction catalyst 17 is arranged in an exhaust pipe 15 of the engine 1 of a hybrid vehicle 100 to store NOx in exhaust gas when operating the engine 1 by lean air-fuel ratio. An electronic control unit (ECU) 30 of the engine 1 performs automatic start and stop operation for stopping the engine 1 when the vehicle stops and charging amount of a battery 9 is large and restarting the engine when starting running of the vehicle and reducing charging amount and increases a fuel injection amount increase value for the engine when restarting when NOx storage amount of NOx storage reduction catalyst is large. Consequently, total amount of NOx stored by NOx storage reduction catalyst can be properly reduced when restarting the engine.

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