Title:
EXHAUST GAS CLEANER FOR ENGINE
Document Type and Number:
WIPO Patent Application WO/2005/033482
Kind Code:
A1
Abstract:
An exhaust gas cleaner of an engine in which cleaning efficiency of Nox is enhanced by preventing clogging of an injection nozzle for supplying a reducing agent to the upstream side of exhaust gas of a reducing catalyst. Using a detection signal S1 of the exhaust gas temperature from an exhaust gas temperature sensor (9), a reducing agent supply unit (6) sets a supply quantity larger than a lower limit of the supply quantity for cooling the inside of an injection nozzle (5) at a temperature below the crystallizing point of urine water and supplies the set supply quantity of urine water to the injection nozzle (5) at the detected exhaust gas temperature. Consequently, the inside of the injection nozzle (5) is cooled at a temperature below the crystallizing point of urine water. Since urine water is not crystallizing in the injection nozzle (5), the injection nozzle (5) can be prevented from clogging and the cleaning efficiency of Nox can be enhanced.
Inventors:
UENO HIROKI (JP)
Application Number:
PCT/JP2004/013305
Publication Date:
April 14, 2005
Filing Date:
September 13, 2004
Export Citation:
Assignee:
NISSAN DIESEL MOTOR CO (JP)
UENO HIROKI (JP)
UENO HIROKI (JP)
International Classes:
F01N3/20; F01N9/00; F01N11/00; (IPC1-7): F01N3/08; F01N3/36
Foreign References:
| JP2003269145A | 2003-09-25 | |||
| JP2003222019A | 2003-08-08 | |||
| JP2003269141A | 2003-09-25 | |||
| JP2000027627A | 2000-01-25 | |||
| JP2003269145A | 2003-09-25 | |||
| EP1331373A2 | 2003-07-30 |
Other References:
See also references of EP 1672191A4
Attorney, Agent or Firm:
Sasajima, Fujio (19-5 Toranomon 1-chome, Minato-k, Tokyo 01, JP)
Download PDF: