Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-11-22
2005-11-22
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S568210
Reexamination Certificate
active
06966303
ABSTRACT:
An EGR control apparatus for a diesel engine which can stop EGR in advance of increase of a fuel injection quantity when acceleration of the engine comprises: EGR means (4) to adjust an EGR volume which is recirculated from an exhaust pipe (2) to an intake pipe (3); filter means (23) to carry out a smoothening-process to an accelerator opening degree detected by an accelerator opening degree sensor; injection quantity determination means (24) to determine a target fuel injection quantity to be injected from an injector (20), using the accelerator opening degree after smoothening-processed; and control means (25) to calculate a fuel injection quantity for judging EGR stop (Qcut), using the accelerator opening degree before smoothening-processed, to allow the EGR means (4) to carry out a decrease control for the EGR volume when the fuel injection quantity for judging EGR stop (Qcut) exceeds a predetermined threshold value (Hi).
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Copy of European Search Report for Serial No. EP 04 01 8149 dated Nov. 9, 2004.
Harunari Toshiaki
Ishii Nobutaka
Nakano Futoshi
Tomikawa Kazuya
Yomogida Koichiro
Isuzu Motors Limited
McCormick Paulding & Huber LLP
Wolfe, Jr. Willis R.
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