Title:
EXHAUST EMISSION PURIFYING SYSTEM FOR V-TYPE EIGHT-CYLINDER INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2007/139170
Kind Code:
A1
Abstract:
Provided is a technique, which can suppress that a fuel added from a fuel adding
valve sticks to an exhaust passage, and that the fuel weaves out of an exhaust emission
purifying device. The fuel adding instant, at which the fuel is added from fuel
adding valves (11, 12), is switched, according to a running condition, to the
instant, at which the instantaneous exhaust emission flow rates in exhaust pipes
(7, 8) are different. In the case of a running condition, under which the fuel
may seriously stick to the exhaust pipes (7, 8), therefore, the fuel is added at
the instant when the instantaneous exhaust emissions through the exhaust pipes
(7, 8) are high, so that the fuel may be easily entrained by the exhaust emissions
to the vicinities of exhaust emission purifying devices (9, 10), thereby to suppress
the stick of the fuel to the exhaust pipes (7, 8). In the case of a running condition,
under which the fuel may seriously weave out of the exhaust emission purifying
devices (9, 10), on the other hand, the fuel is added at the instant when the instantaneous
exhaust emissions through the exhaust pipes (7, 8) are low, so that the fuel may
be hardly entrained by the exhaust emissions and slowed down in its movement,
thereby to suppress the weave of the fuel out of the exhaust emission purifying
devices (9, 10).
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Inventors:
KANTO YUJI (JP)
Application Number:
PCT/JP2007/061037
Publication Date:
December 06, 2007
Filing Date:
May 24, 2007
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
KANTO YUJI (JP)
KANTO YUJI (JP)
International Classes:
F01N3/36; F01N3/08; F01N13/10
Foreign References:
| JP2006022787A | 2006-01-26 | |||
| JP2005351248A | 2005-12-22 | |||
| JP2003307123A | 2003-10-31 | |||
| JP2004293428A | 2004-10-21 | |||
| JP2006022788A | 2006-01-26 | |||
| JP2001280125A | 2001-10-10 | |||
| JP2002106332A | 2002-04-10 |
Other References:
See also references of EP 2031203A4
Attorney, Agent or Firm:
KAWAGUCHI, Yoshiyuki et al. (4-10 Higashi Nihonbashi 3-chom, Chuo-ku Tokyo 04, JP)
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