Control apparatus, control method and engine control unit

Details Control apparatus, control method and engine control unit Control apparatus, control method and engine control unit

2005-02-15

2005-02-15

Wolfe, Willis R. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S106000, C701S102000, C701S101000, C701S114000, C123S688000, C123S479000, C073S118040

Reexamination Certificate

active

06856891

ABSTRACT:
A control apparatus is provided for eliminating a step in a control input before and after switching between control processing based on one modulation algorithm selected from a Δ modulation algorithm, a ΔΣ modulation algorithm, and a ΣΔ modulation algorithm and control processing based on a response specified control algorithm to avoid a sudden change in the output of a controlled object in the event of the switching. The control apparatus comprises an ECU for calculating a predicted value for an output deviation, calculating a target air/fuel ratio in accordance with the predicted value based on the ΔΣ modulation algorithm and sliding mode control algorithm, selecting the target air/fuel ratio calculated based on one of the algorithms in accordance with a particular operating condition of an internal combustion engine, and switching the calculation of the target air/fuel ratio when the selection of the target air/fuel ratio is changed from the ΔΣ modulation algorithm to the sliding mode control algorithm if the absolute predicted value is equal to or less than a predetermined value.

REFERENCES:
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patent: 5365216 (1994-11-01), Kotwicki et al.
patent: 5758494 (1998-06-01), Davey
patent: 6370935 (2002-04-01), He et al.
patent: 6564543 (2003-05-01), Orzel et al.
patent: 6568177 (2003-05-01), Surnilla

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