Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2008-07-08
2008-07-08
Tran, Binh Q (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S276000, C060S285000, C060S286000, C060S292000, C060S297000, C060S299000, C060S324000
Reexamination Certificate
active
07395660
ABSTRACT:
The present invention has for its problem to be solved to provide a technique in which in an exhaust gas purification system for an internal combustion engine with a filter being arranged on an exhaust passage for trapping PM in an exhaust gas, it is possible to suppress an excessive rise in temperature of the filter during execution of filter regeneration control more preferably. In the present invention, when the amount of intake air in the internal combustion engine decreases up to an amount at which an excessive rise in temperature of the filter might be induced during the execution of filter regeneration control, the oxygen concentration of an ambient atmosphere around the filter is decreased up to a target oxygen concentration. At this time, when the amount of intake air being decreased is more than a certain amount, the oxygen concentration of the ambient atmosphere around the filter is lowered mainly by supplying a reducing agent to a catalyst that is arranged at a location upstream of the filter or supported on the filter (S106). On the other hand, when the amount of intake air being decreased is equal to or less than the certain amount, the oxygen concentration of the ambient atmosphere around the filter is lowered mainly by performing exhaust gas throttling by means of an exhaust gas throttle valve (S104).
REFERENCES:
patent: 6644022 (2003-11-01), Hirota et al.
patent: 6668548 (2003-12-01), Asanuma et al.
patent: 6817174 (2004-11-01), Igarashi et al.
patent: 6966179 (2005-11-01), Onodera et al.
patent: 7246485 (2007-07-01), Ohki et al.
patent: 7313913 (2008-01-01), Okugawa et al.
patent: U 3-104138 (1991-10-01), None
patent: A 2001-152925 (2001-06-01), None
patent: A 2002-188493 (2002-07-01), None
patent: A 2002-242732 (2002-08-01), None
patent: A 2003-027990 (2003-01-01), None
patent: A 2003-106142 (2003-04-01), None
patent: A 2003-172124 (2003-06-01), None
patent: A 2003-214152 (2003-07-01), None
patent: A 2004-353529 (2004-12-01), None
Hashizume Takeshi
Kogo Tomoyuki
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
Tran Binh Q
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