Title:
DIESEL ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/255537
Kind Code:
A1
Abstract:
Provided is a diesel engine in which a DPF can be regenerated even during no-load and/or light-load operation. A DPF regeneration process is configured such that after fulfillment of an initiation condition (S1) of a process to regenerate a DPF in which PM has accumulated, opening degree reduction control (S2) for an exhaust throttle valve is performed, and when exhaust has reached a temperature equal to or greater than a prescribed after-injection allowance temperature TA, after-injection control is then initiated (S5). After exhaust has reached a temperature equal to or greater than a prescribed post-injection allowance temperature TP due to the combustion of after-injection fuel, post-injection control is initiated (S7), and the PM accumulated in the DPF is incinerated by exhaust heated by catalytic combustion of post-injection fuel in a DOC on the downstream side of the valve.
Inventors:
KATO DAICHI (JP)
ISHII YUKI (JP)
IMAHARA HIROAKI (JP)
OKANO HIROAKI (JP)
ISHII YUKI (JP)
IMAHARA HIROAKI (JP)
OKANO HIROAKI (JP)
Application Number:
PCT/JP2020/015578
Publication Date:
December 24, 2020
Filing Date:
April 06, 2020
Export Citation:
Assignee:
KUBOTA KK (JP)
International Classes:
F02D9/04; F01N3/023; F01N3/025; F01N3/033; F01N3/035; F01N3/18; F01N3/20; F01N3/24; F02D41/38; F02D41/40; F02D43/00; F02D45/00
Foreign References:
| JP2012067731A | 2012-04-05 | |||
| JP2017223182A | 2017-12-21 | |||
| JP2015068233A | 2015-04-13 | |||
| JP2005307744A | 2005-11-04 | |||
| JP2010151058A | 2010-07-08 |
Other References:
See also references of EP 3988776A4
Attorney, Agent or Firm:
SUZUE Shoji (JP)
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