Learning method of injection characteristic and fuel...

Details Learning method of injection characteristic and fuel... Learning method of injection characteristic and fuel...

2007-06-25

2008-11-11

Kwon, John T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S115000, C123S434000, C123S674000

Reexamination Certificate

active

07451037

ABSTRACT:
A learning time counter is started and updated if an operation state is stabilized after shifting to a certain operation range. Then, convergence of a FCCB correction value of a variation in an injection characteristic is determined. If the FCCB correction value is determined to have converged, a permit flag is turned on and the FCCB correction value is decided as a learning value. Even if the FCCB correction value does not converge, the learning value is compulsorily decided when the learning time counter reaches a threshold. If the FCCB correction value is decided early, a surplus time is added to a threshold of the next operation range. Thus, the variation of the injection characteristics among cylinders can be learned highly accurately while averting unnecessary lengthening of a learning time.

REFERENCES:
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patent: 5964208 (1999-10-01), Yamashita et al.
patent: 6755176 (2004-06-01), Takeuchi et al.
patent: 6968268 (2005-11-01), Yamada et al.
patent: 6990958 (2006-01-01), Asano et al.
patent: 2004/0149263 (2004-08-01), Tanei et al.
patent: 2003-343328 (2003-12-01), None

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