Fuel injection controller

Details Fuel injection controller Fuel injection controller

2007-09-26

2009-08-11

Vo, Hieu T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S108000, C123S568120

Reexamination Certificate

active

07574298

ABSTRACT:
A fuel injection controller of an internal combustion engine decreases a target intake quantity stepwise and increases an opening degree command value of an EGR valve stepwise when the controller switches control to rich combustion control. Accordingly, an intake quantity gradually decreases and an EGR quantity gradually increases, so an oxygen quantity flowing into a combustion chamber (cylinder inflow oxygen quantity) gradually decreases. The injection quantity is gradually increased in accordance with the gradual decrease of the oxygen quantity. Thus, the fuel injection controller can perform processing for making an air fuel ratio rich in order to discharge nitrogen oxides from an occlusion agent while appropriately inhibiting torque fluctuation.

REFERENCES:
patent: 5621167 (1997-04-01), Fang-Cheng
patent: 6085732 (2000-07-01), Wang et al.
patent: 6227163 (2001-05-01), Enoki et al.
patent: 7128035 (2006-10-01), Lancaster et al.
patent: 2006/0011180 (2006-01-01), Sasaki et al.
patent: 199 39 050 (2001-03-01), None
patent: 6-108824 (1994-04-01), None
patent: 2003-322015 (2003-11-01), None
Japanese Office Action dated Dec. 16, 2008 issued in corresponding Japanese Application No. 2006-267898, with English translation.
German Office Action dated Feb. 10, 2009, issued in corresponding German Application No. 10 2007 000 797.5-26, with English translation.

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