Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Nobuki Kobayashi

Shizuo Sasaki

Kouji Yoshizaki

Yoshiki Hashimoto

Hiroki Murata

Taro Aoyama

Yoshihiro Hotta

Yasuhiko Otsubo

Jun Tahara

Tatsumasa Sugiyama

Kiyomi Nakakita

Kazuhisa Inagaki

Shoji Nakahara

Masato Tsuzuki

Masahiko Ishikawa

Hidenaga Kato

Cylinders of a diesel engineare provided with cylinder pressure sensorstofor detecting combustion chamber pressures. An electronic control unit (ECU)of the engine selects optimum combustion parameters in accordance with a fuel injection mode of fuel injectorstoof the engine and a combustion mode determined by the amount of EGR gas supplied from the EGR valvefrom among a plurality of types of combustion parameters expressing the combustion state of the engine calculated based on the cylinder pressure sensor output and feedback controls the fuel injection amount and fuel injection timing so that the values of the combustion parameters match target values determined in accordance with the engine operating conditions. Due to this, the engine combustion state is controlled to the optimum state at all times regardless of the fuel injection mode or combustion mode.

Control system for internal combustion engine

Diesel engine is operated in a first warm-up mode in an early warm-up period after startup so as to accelerate activation of the catalyst, and then in a second warm-up mode in a late warm-up period after the early warm-up period so as to maintain activity of the catalyst. The first warm-up mode provides more energy to the catalyst with exhaust gases than the normal operation mode of the diesel engine. The second warm-up mode provides exhaust gases of higher temperature to the catalyst than the normal operation mode.

Catalyst warm up control for diesel engine

Growing community of inventors

Toyota, Japan

Nobuki Kobayashi