Title:
EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2008/150018
Kind Code:
A1
Abstract:
A construction in which a reducing agent is added to exhaust gas in an exhaust path
on the upstream side of a pre-catalyst and in which a reducing agent addition valve
is placed at a position at which at least a part of the reducing agent can arrive
in a liquid state at the pre-catalyst. In the construction, the reducing agent
can be supplied in a preferable condition by the exhaust purification device
provided in an exhaust path on the downstream side of the pre-catalyst. When the
reducing agent is added by the reducing agent addition valve (S107), the flow
rate of exhaust gas entering the pre-catalyst is reduced so that at least a part
of the reducing agent having arrived at and vaporized by the pre-catalyst flows
back (S106).
Inventors:
TSUJIMOTO KENICHI (JP)
Application Number:
PCT/JP2008/060719
Publication Date:
December 11, 2008
Filing Date:
June 05, 2008
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
TSUJIMOTO KENICHI (JP)
TSUJIMOTO KENICHI (JP)
International Classes:
F01N3/20; F01N3/08; F01N3/24; F01N3/36
Foreign References:
| JP2005120938A | 2005-05-12 | |||
| JP2007120452A | 2007-05-17 | |||
| JP2006299900A | 2006-11-02 | |||
| JP2000257419A | 2000-09-19 | |||
| JP2005127257A | 2005-05-19 |
Other References:
See also references of EP 2163742A4
Attorney, Agent or Firm:
KAWAGUCHI, Yoshiyuki et al. (4-10 Higashi Nihonbashi 3-chome,Chuo-k, Tokyo 04, JP)
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