Title:
PM CONTINUOUS REGENERATION DEVICE FOR DIESEL ENGINE, AND METHOD OF PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/031548
Kind Code:
A1
Abstract:
In conventional automobile diesel engines, efforts have been made to reduce harmful substances contained in exhaust gases mainly by improving combustion in the engine itself; however, it has been very difficult to satisfy the exhaust restrictions in force on and after 2005. Accordingly, the invention provides a PM oxidation method for oxidizing particulate matter contained in exhaust gases discharged from a diesel engine (10) by passing the exhaust gases through an exhaust cleaning device, the method being characterized by providing an intake throttle (24) in the intake passageway of the diesel engine (10) to increase the temperature of the exhaust gases flowing from the diesel engine (10) into the exhaust cleaning device, and periodically opening the intake throttle (24) to supply fresh gas to the diesel engine (10). According to the invention, it becomes possible to significantly increase the NO and residual oxygen in the exhaust gases flowing into a μDPF (30) or the like and to effectively oxidize the particulate matter during a low load on the diesel engine and also during idling.
Inventors:
YAMAMORI SHIGERU (JP)
Application Number:
PCT/JP2003/012476
Publication Date:
April 15, 2004
Filing Date:
September 30, 2003
Export Citation:
Assignee:
TOKUDAIJI INST OF AUTOMOTIVE C (JP)
DEPRO CORP (JP)
YAMAMORI SHIGERU (JP)
DEPRO CORP (JP)
YAMAMORI SHIGERU (JP)
International Classes:
B01D46/42; F01N3/02; F01N3/023; F01N3/031; F01N3/035; F02D9/02; F02D13/02; F02D13/06; F02D21/08; F02D41/02; F02D41/04; F02D43/00; F02D45/00; F01N13/02; F02B3/06; F02M31/13; (IPC1-7): F01N3/02; F02D9/02; F02D21/08; F02D41/04
Foreign References:
| JPS59176413A | 1984-10-05 | |||
| JPH03271515A | 1991-12-03 | |||
| JP2002276422A | 2002-09-25 | |||
| JPH0457619U | 1992-05-18 | |||
| JPH0450420A | 1992-02-19 | |||
| JP2002227688A | 2002-08-14 | |||
| JPS6047937A | 1985-03-15 |
Attorney, Agent or Firm:
Yoshida, Yoshiharu (21-19 Toranomon 1-chom, Minato-ku Tokyo, JP)
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