Isuzu Motors Limited

Yoshitaka Aratsuka

Hirofumi Hashimoto

Takuo Nishi

In a diesel engine provided with a diesel particulate filterand an exhaust throttle valve, noise is decreased that is produced when the exhaust throttle valve is returned back to the fully opened state after a diesel particulate filterhas been regenerated by oxidizing and removing the particulate matter deposited thereon. The exhaust system of the diesel engine is equipped with the diesel particulate filterand a catalyston the upstream thereof, and is further equipped with the exhaust throttle valveon the downstream. The diesel particulate filteris regenerated by operating the diesel engine in a state where the exhaust throttle valveis opened to a small degree. When the regeneration has finished, the diesel engine is run at a decreased rotational speed and, thereafter, the exhaust throttle valveis returned back to the fully opened state. When the engine is run at a decreased rotational speed, the pressure in the exhaust system decreases making it possible to greatly decrease the noise that generates at the time of the opening of the exhaust throttle valve

Growing community of inventors

Kanagawa, Japan

Yoshitaka Aratsuka