Toyota Jidosha Kabushiki Kaisha

Isamu Gotou

Koji Kitano

Naoki Suzuki

Toshiya Nakajima

A control devicefor an internal combustion engine includes an in-cylinder oxygen concentration acquisition unit configured to acquire an in-cylinder oxygen concentration, an in-cylinder temperature acquisition unit configured to acquire an in-cylinder temperature, a target in-cylinder temperature acquisition unit configured to acquire a target in-cylinder temperature during main injection based on the in-cylinder oxygen concentration acquired by the in-cylinder oxygen concentration acquisition unit, and an in-cylinder oxygen concentration control unit configured to execute in-cylinder oxygen concentration control for controlling an in-cylinder oxygen concentration during pilot injection performed prior to the main injection based on the difference between the target in-cylinder temperature during the main injection acquired by the target in-cylinder temperature acquisition unit and the in-cylinder temperature acquired by the in-cylinder temperature acquisition unit.

Control device for internal combustion engine based on in-cylinder temperature and oxygen concentration

An exhaust emission control system for an internal combustion engine includes a filter that traps particulate matters and ash and a controller that starts a filter recovery process by controlling a temperature of the filter to a target temperature to bring an inside of the filter into an oxidizing atmosphere such that the particulate matter trapped and accumulated on the filter is removed through oxidization when an estimated amount of the particulate matters trapped and accumulated on the filter exceeds a predetermined amount. The target temperature is set based on the estimated amount of the ash trapped and accumulated on the filter. Even if the amount of the accumulated particulate matter per unit volume is increased owing to accumulation of the ash on the filter, and oxidization reaction speed of the particulate matter may be reduced, thus preventing excessive temperature increase in the filter.

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Susono, Japan

Isamu Gotou