Fuel injection amount control apparatus for internal...

Details Fuel injection amount control apparatus for internal... Fuel injection amount control apparatus for internal...

2007-05-22

2008-10-21

Kwon, John T (Department: 3747)

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

C123S492000

Reexamination Certificate

active

07438048

ABSTRACT:
An object is to prevent deterioration in both exhaust emission and fuel efficiency by suitably combining OTP boosting with power boosting. An electronic control unit (ECU)30of the present invention is arranged to control a fuel injection amount of an injector7to an engine1according to an operating condition of the engine1, and perform OTP boosting of the fuel injection amount to prevent overheating of a discharge passage3and a catalyst converter11when the engine1comes into a high load and high rotation operating condition and perform power boosting that increases the fuel injection amount to enrich an air-fuel ratio to an output air-fuel ratio when the engine1comes into a high load operating condition. The ECU30executes the power boosting when the engine1comes into the high load and high rotation operating condition and executes the OTP boosting later from the start of the power boosting, delayed by a period attributable to at least an increased amount of fuel by the power boosting.

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patent: 6549840 (2003-04-01), Mikami et al.
patent: 2001/0042535 (2001-11-01), Yamazaki et al.
patent: A 7-166918 (1995-06-01), None
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patent: A 9-96234 (1997-04-01), None
patent: A 11-173197 (1999-06-01), None

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