Kubota Corporation

Tomohiro Ninomiya

Yongchol Lee

Katsushi Inoue

Yuuki Ishii

Yusuke Suzuki

Tetsuya Kosaka

Yasuo Fujii

Masanori Fujiwara

Kazumichi Matsuishi

Toshio Nakanishi

Kenta Mitamura

Noriyoshi Eguchi

Takashi Kushigemachi

An engine includes an engine body, a DPF case therein, high pressure and low pressure EGR paths, and a supercharger. The high pressure EGR path is between exhaust and intake manifolds. An exhaust gas discharge path extends from the DPF case. An intake pipe extends from the supercharger air compressor. The low pressure EGR path is between the exhaust gas discharge path of the DPF case and the intake pipe. The low pressure EGR path includes a low pressure EGR cooler. An extending direction of a crankshaft defines a longitudinal direction. A flywheel exists on a rear side. A width direction of the engine body defines a lateral direction. The low pressure EGR path includes a rear path portion extending along a rear side of the engine body, and a side path portion extending along a lateral side of the engine body on a side close to the exhaust manifold.

Engine

An exhaust gas processing device for a diesel engine includes a DPF, a PM deposition amount estimating unit for PM deposited in the DPF, a DPF regenerating unit, a DPF regeneration control unit, a storage unit, an acceleration regeneration request information notifying unit, an acceleration regeneration start operating unit, and a mode selecting unit. When a normal regeneration process is selected, the time at which acceleration regeneration request determination reserve period Telapses from the start of the normal regeneration process without the end of the normal regeneration process is time Tfor acceleration regeneration request determination, at which time, if the PM deposition amount estimation value is greater or equal to acceleration regeneration request determination value J, it is determined that there is the acceleration regeneration request. The DPF regeneration control unit allows the acceleration regeneration request information notifying unit to start notification of the acceleration regeneration request information.

Exhaust gas processing device for diesel engine

The disclosed exhaust treatment device for a diesel engine can prevent heat damage to a DPF when regenerating said DPF. If a selection device (), which selects whether to allow or prohibit an automatic DPF regeneration process, is set to prohibit the automatic DPF regeneration process, a DPF regeneration control device () is made able to start a process to cancel execution of the automatic DPF regeneration process. If the selection device () is set to allow the automatic DPF regeneration process, the DPF regeneration control device () retracts the cancellation of the automatic DPF regeneration process, allowing execution of the previously-cancelled automatic DPF regeneration process to begin.

Exhaust treatment device for a diesel engine

Growing community of inventors

Sakai, Japan

Tomohiro Ninomiya