Title:
ディーゼルエンジン
Document Type and Number:
Japanese Patent JP7366877
Kind Code:
B2
Abstract:
To provide a diesel engine capable of regenerating a DPF even during no-load and/or low-load operation.SOLUTION: In DPF regeneration processing, after starting conditions S1 for the regeneration processing of the DPF where PMs are accumulated are established, the opening reduction control S2 of an exhaust throttle valve is performed. When the temperature of exhaust gas is equal to or higher than a predetermined after-injection permission temperature TA, after-injection control is started S5 thereafter, and after the temperature of the exhaust gas is equal to or higher than a predetermined post-injection permission temperature TP with the combustion of after-injection fuel, post-injection control is started S7. The exhaust gas whose temperature is raised by the catalyst combustion of the post injection fuel on a valve upstream side DOC incinerates the PMs accumulated on the DPF. A DOCDOC arranged on the exhaust gas upstream side of the DPF consists of a valve upstream side DOC only provided on the exhaust upstream side of the exhaust throttle valve.SELECTED DRAWING: Figure 2
Inventors:
Daichi Kato
Hiroki Ishii
Hiroaki Imahara
Hiroaki Okano
Hiroki Ishii
Hiroaki Imahara
Hiroaki Okano
Application Number:
JP2020202429A
Publication Date:
October 23, 2023
Filing Date:
December 07, 2020
Export Citation:
Assignee:
Kubota Corporation
International Classes:
F01N3/033; F01N3/023; F01N3/18; F01N3/20; F02D9/02; F02D9/04; F02D41/40; F02D43/00; F02D45/00
Domestic Patent References:
| JP2010270617A | ||||
| JP2007285233A | ||||
| JP2017227182A | ||||
| JP2006283748A | ||||
| JP2005090319A | ||||
| JP2005016393A |
Attorney, Agent or Firm:
Shoji Suzue
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