Title:
ENGINE EXHAUST GAS PURIFICATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2008/035623
Kind Code:
A1
Abstract:
[PROBLEMS] To effectively remove NOx from exhaust gas even when the temperature
of exhaust gas is relatively low. [MEANS FOR SOLVING PROBLEMS] The exhaust gas
purification apparatus includes selective reduction type catalyst (21) disposed
in exhaust pipe (16); liquid injection nozzle (23) disposed upstream thereof;
liquid injection means (30) capable of injecting ureal liquid (32) through the
liquid injection nozzle; controller (44) and mixer (26). The apparatus further
includes ammonia purification catalyst (54) disposed downstream of the selective
reduction type catalyst (21); particulate filter (51) disposed upstream of
the nozzle (23); oxidation catalyst (53) disposed upstream of the same; and temperature
sensor (43) for detecting the temperature of the selective reduction type catalyst
(21). Further, there is provided a fuel injection device structured so as to
inject fuel into a cylinder after an upper dead center of piston and furnished
with a controller for controlling the fuel injection device so as to inject fuel
into a cylinder after an upper dead center of piston when a temperature sensor
detects that the temperature of the selective reduction type catalyst (21) is
a given value or below.
Inventors:
HOSOYA MITSURU (JP)
KAWADA YOSHIHIRO (JP)
KAWADA YOSHIHIRO (JP)
Application Number:
PCT/JP2007/067903
Publication Date:
March 27, 2008
Filing Date:
September 14, 2007
Export Citation:
Assignee:
HINO MOTORS LTD (JP)
HOSOYA MITSURU (JP)
KAWADA YOSHIHIRO (JP)
HOSOYA MITSURU (JP)
KAWADA YOSHIHIRO (JP)
International Classes:
F01N3/08; B01D53/56; B01D53/74; B01D53/86; B01D53/94; F01N3/02; F01N3/24; F01N3/28; F02D23/02; F02D41/04; F02D41/38; F02D45/00
Foreign References:
| JP2006200473A | 2006-08-03 | |||
| JP2005320880A | 2005-11-17 | |||
| JP2003184542A | 2003-07-03 | |||
| JP2003232218A | 2003-08-22 | |||
| JP2006090185A | 2006-04-06 | |||
| JP2005264774A | 2005-09-29 | |||
| JP2003232218A | 2003-08-22 |
Attorney, Agent or Firm:
SUDA, Masayoshi (21-11Higashi-Ikebukuro 1-chome,Toshima-k, Tokyo 13, JP)
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