Isuzu Motors Limited

Noriyuki Tsukamoto

Tatsuo Mashiko

Futoshi Nakano

Takashi Haseyama

Hitoshi Satou

Akira Hirata

Shinji Gotou

Yorimasa Tsubota

Kouichirou Yomogida

Toshiaki Adachi

Takuro Mita

Yoshifumi Hanamura

Tamotsu Anagama

Satoshi Uehara

Nobuo Aoki

Akihiro Inamura

Provided is a piston temperature state monitoring system for an internal combustion engine and a piston temperature monitoring method for an internal combustion engine which are capable of properly managing a history of a piston temperature. When the number of times of a piston temperature suppression control is counted, if a ratio of a temperature difference which is the difference between a maximum limit temperature and a piston temperature to a margin width which is the difference between the maximum limit temperature and a control start temperature is equal to or less than a count threshold ratio set in advance or calculated, a count output system outputs a count signal.

Piston temperature state monitoring system for internal combustion engine and piston temperature monitoring method for internal combustion engine

An exhaust emission purification system having a controller performing exhaust temperature rise control including multistage delay injection control for raising the exhaust temperature, if the exhaust gas temperature is lower than a predetermined judgment temperature, and performing particulate matter combustion removal control including post injection control, if the exhaust gas temperature becomes equal to or higher than the predetermined judgment temperature, when forced regeneration of a diesel particulate filter is carried out. The multistage delay injection control is forbidden when an idle operation state of an internal combustion engine occurs for a predetermined judgment time and a power take-off device is operating. A control method for exhaust emission purification is also provided sustaining a diesel particulate filter for purifying particulate matter in exhaust gas by executing forced regeneration while avoiding variation in engine speed, even if the power take-off device is operating during an extended idling operation.

Control method of exhaust emission purification system and exhaust emission purification system

Growing community of inventors

Ryugasaki, Japan

Noriyuki Tsukamoto