Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2006-01-24
2006-01-24
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...
C060S274000, C060S276000, C060S277000, C701S103000, C701S109000
Reexamination Certificate
active
06988359
ABSTRACT:
An exhaust gas control apparatus and an exhaust gas purification method are for an internal combustion engine provided with a first catalyst portion disposed in an exhaust passage of the internal combustion engine, and a second catalyst portion disposed in the exhaust passage downstream of the first catalyst portion. A value that changes according to at least an amount of oxygen stored in the first catalyst portion is obtained as an obtained value. An air-fuel ratio of the internal combustion engine is controlled such that the obtained value matches a target value. A value that changes according to at least an amount of oxygen stored in the second catalyst portion is calculated as a calculated value, based on at least a state of exhaust gas flowing into the second catalyst portion. The target value is changed according to the calculated value. Accordingly, harmful components, such as unburned components and oxides of nitrogen, are able to be effectively purified even if the air-fuel ratio of the internal combustion engine changes abruptly.
REFERENCES:
patent: 5765370 (1998-06-01), Hanafusa et al.
patent: 5966930 (1999-10-01), Hatano et al.
patent: 6502389 (2003-01-01), Katayama et al.
patent: 6691508 (2004-02-01), Sato et al.
patent: 6751950 (2004-06-01), Ikemoto et al.
patent: 6766640 (2004-07-01), Ishizuka et al.
patent: A 2001-234787 (2001-08-01), None
Ide Koji
Kato Naoto
Nagai Toshinari
Oi Yasuhiro
Toyota Jidosha & Kabushiki Kaisha
Tran Binh Q.
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