Title:
EXHAUST GAS PURIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/049044
Kind Code:
A1
Abstract:
An exhaust gas purification device where occurrence of detection failure of injection nozzle clogging is suppressed. An exhaust gas purification device for an engine, having a reduction catalyst (4) provided in the exhaust system of the engine (1) and reducing and purifying a nitrogen oxide in exhaust gas by a urea water, a urea water tank (6) storing the urea water, a urea water supply means (7) for sucking up the urea water and sending it out after mixing it with high-pressure air, and an injection nozzle (5) for injecting the urea water, mixed with the high-pressure air, inside an exhaust pipe (3) of the exhaust gas system, to the exhaust gas upstream side of the reduction catalyst (4). The exhaust gas purification device further has a clogging detection means (8) for detecting clogging of the injection nozzle based on a detection output on the pressure of air introduced into the urea water supply means (7) and a detection output on the temperature of the injection nozzle (5).
More Like This:
Inventors:
NISHINA MITSUHIRO (JP)
MATSUNAGA HIDEKI (JP)
MATSUNAGA HIDEKI (JP)
Application Number:
PCT/JP2005/019610
Publication Date:
May 11, 2006
Filing Date:
October 25, 2005
Export Citation:
Assignee:
NISSAN DIESEL MOTOR CO (JP)
NISHINA MITSUHIRO (JP)
MATSUNAGA HIDEKI (JP)
NISHINA MITSUHIRO (JP)
MATSUNAGA HIDEKI (JP)
International Classes:
F01N3/08; B01D53/90; F02D45/00; B01D53/94; F01N3/18; F01N3/20; F01N3/28; F01N3/30; F01N11/00
Foreign References:
| JP2003269145A | 2003-09-25 | |||
| JP2003328744A | 2003-11-19 | |||
| JPH11270329A | 1999-10-05 | |||
| JP2000027627A | 2000-01-25 | |||
| EP1688599A1 | 2006-08-09 | |||
| EP1672191A1 | 2006-06-21 |
Other References:
See also references of EP 1811147A4
Attorney, Agent or Firm:
Sasajima, Fujio (19-5 Toranomon 1-chom, Minato-ku Tokyo 01, JP)
Download PDF: