Vehicular control system

Details Vehicular control system Vehicular control system

2005-02-15

2005-02-15

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

C700S045000

Reexamination Certificate

active

06856888

ABSTRACT:
In an air-fuel ratio control system, a gain Kh is adaptively determined on the basis of a value z obtained by multiplying a target fuel amount difference value Δym (derivative value of a target fuel amount) by an error e between a target excess fuel ratio (target φ) and an actual excess fuel ratio (actual φ) detected by an air-fuel ratio sensor. A value obtained by multiplying the target fuel amount difference value Δym by the gain Kh is determined as an F/F corrected value ucmp. In this case, when the error e between the target φ and the actual φ is determined in consideration of the fact that a controlled system has dead time d, a target φd at the point in time going back in the past by the amount of the dead time d is used to obtain error e=target φd−actual φ.

REFERENCES:
patent: 3758762 (1973-09-01), Littman et al.
patent: 4714988 (1987-12-01), Hiroi et al.
patent: 5479897 (1996-01-01), Kawai et al.
patent: 61-21505 (1986-01-01), None
patent: 64-64003 (1989-03-01), None
patent: 2001-61292 (2001-03-01), None

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