Title:
EXHAUST EMISSION CONTROL DEVICE FOR DIESEL ENGINE
Document Type and Number:
Japanese Patent JP3951899
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To continuously burn PM collected by a DPF in all the driving ranges of an on-vehicle diesel engine even under very cold environments.
SOLUTION: This exhaust emission control device for a diesel engine is provided with a first continuous regeneration type DPF in an engine exhaust passage, a second continuous regeneration type DPF in a bypass passage, a change-over valve to change exhaust gas passages, an exhaust gas temperature raising means, an exhaust temperature range detecting means, and a control means to control the exhaust gas temperature raising means and the change-over valve. The control means controls the change-over valve to actuate the exhaust gas temperature rising means, conduct post-injection, and have exhaust gas pass the second continuous regeneration DPF in a case where an engine exhaust temperature range detected by the exhaust temperature range detecting means is a very low temperature range lower than a prescribed temperature range.
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Inventors:
Toshiki Minami
Application Number:
JP2002332382A
Publication Date:
August 01, 2007
Filing Date:
November 15, 2002
Export Citation:
Assignee:
Isuzu Motors Limited
International Classes:
F01N3/02; F01N3/023; F02D9/02; F01N3/025; F01N3/029; F01N3/031; F01N3/20; F01N3/36; F02D9/04; F02D13/02; F02D41/02; F02D41/04; F02D41/38; F02D41/40; F02D45/00; F01N13/02; F02B37/00; F02M25/07; (IPC1-7): F01N3/02; F01N3/36; F02D9/02; F02D9/04; F02D41/04; F02D41/38; F02D45/00
Domestic Patent References:
| JP7189656A | ||||
| JP8319820A |
Foreign References:
| WO2001033051A1 |
Attorney, Agent or Firm:
Shinichi Ogawa
Takashi Noguchi
Kazuhiko Saishita
Takashi Noguchi
Kazuhiko Saishita