US Patent No: 8,181,447

Number of patents in Portfolio can not be more than 2000

Exhaust gas purification device

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ALSO PUBLISHED AS: 20090301063
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Abstract

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An ECU corrects a fuel addition interval, based on an amount of change between an exhaust gas temperature at present and a basic exhaust gas temperature obtained when a basic addition interval is set, to reduce the fuel addition interval with an increase in the amount of change in the exhaust gas temperature. With such correction of the addition interval, when the exhaust gas temperature is increased in a highland region or the like, the fuel addition interval is corrected to be reduced and an fuel addition amount is corrected to be increased according to the increase in the exhaust gas temperature. Thereby, an increase in a temperature at a tip portion of a fuel addition valve can be suppressed, and thus clogging of an ejection hole of the fuel addition valve with deposits can be avoided.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOYOTA JIDOSHA KABUSHIKI KAISHAAICHI-KEN14409

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kobayashi, Masaaki Tokyo, JP 300 1943
Tahara, Jun Toyota, JP 18 57

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
5,537,321 Diagnostic apparatus for controlling the operation of a catalytic converter 17 1993
5,842,341 Exhaust emission purification apparatus for an internal combustion engine 49 1997
 
MAN TRUCK & BUS AG (1)
6,119,448 Method for metering a reducing agent into NO.sub.x -containing exhaust gas of an internal combustion engine 76 1998

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