Title:
DIESEL ENGINE EXHAUST GAS PURIFIER AND CONTROL MEANS
Document Type and Number:
WIPO Patent Application WO/2005/003536
Kind Code:
A1
Abstract:
An object of the invention is to provide a diesel engine exhaust gas purifier which maintains a predetermined exhaust gas temperature capable of continuous regeneration of particulate matter while reducing the rate of emission of NOx in a wider region of operation. The diesel engine exhaust gas purifier of the invention comprises the exhaust valve timing of opening an exhaust valve in the vicinity of the end of the engine suction stroke to send back exhaust gases to a cylinder prior to combustion, an external EGR valve for controlling the amount of recirculation of exhaust gases when exhaust gases after being cooled are recirculated to the suction side, a suction choke for adjusting the flow rate of engine suction air, an exhaust choke for adjusting the flow rate of engine exhaust gases, and a control means for outputting information to control the external EGR valve, suction choke and exhaust choke by inputting an acceleration pedal step-on amount and an engine rpm and by reference to a map. This makes it possible to maintain a predetermined exhaust gas temperature capable of continuous regeneration of particulate matter while reducing the rate of emission of NOx in a wider region of operation.
Inventors:
MATSURA YOSHIMASA (JP)
Application Number:
PCT/JP2004/008986
Publication Date:
January 13, 2005
Filing Date:
June 25, 2004
Export Citation:
Assignee:
TOKUDAIJI INST OF AUTOMOTIVE C (JP)
DEPRO CORP (JP)
MATSURA YOSHIMASA (JP)
DEPRO CORP (JP)
MATSURA YOSHIMASA (JP)
International Classes:
B01D46/42; F01L13/00; F01N3/02; F01N3/023; F01N3/025; F01N3/029; F01N3/031; F01N3/20; F01N3/24; F01N3/28; F02D9/02; F02D9/04; F02D13/02; F02D21/08; F02D23/00; F02D41/00; F02D41/02; F02D41/04; F02D45/00; F02M25/07; F01N3/035; F01N13/02; F02B37/00; (IPC1-7): F02D21/08; F01N3/02; F02D9/02; F02D9/04; F02D13/02; F02D43/00; F02M25/07
Foreign References:
| JP2002349241A | 2002-12-04 | |||
| JP2002317662A | 2002-10-31 | |||
| JP2001090514A | 2001-04-03 | |||
| JP2000282958A | 2000-10-10 | |||
| JP2001115822A | 2001-04-24 | |||
| JP2001098983A | 2001-04-10 | |||
| JP2002089375A | 2002-03-27 |
Attorney, Agent or Firm:
Yoshida, Yoshiharu (Toranomon Building 6F 21-19, Toranomon 1-chom, Minato-ku Tokyo 01, JP)
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