Controller

Details Controller Controller

2007-01-02

2007-01-02

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

C123S090150, C701S110000

Reexamination Certificate

active

11329026

ABSTRACT:
A controller which is capable of maintaining stability of a control system even if the dynamic characteristic of a controlled object temporarily changes sharply in the case where a controlled object model is used. An ECU of the controller calculates a first disturbance estimate by carrying out a low-pass filtering process and a rate limiting process on a first estimation error as the difference between a fuel pressure estimate calculated with an estimation algorithm and a fuel pressure. Then, the ECU calculates a second disturbance estimate based on a second estimation error as the difference between the first estimation error and the first disturbance estimate, with a predetermined disturbance estimation algorithm. Further, the ECU calculates a fuel pressure control input based on the fuel pressure and the first and second disturbance estimates, with a predetermined control algorithm.

REFERENCES:
patent: 5638788 (1997-06-01), Sanvido et al.
patent: 6186124 (2001-02-01), Stefanopoulou et al.
patent: 2004/0236492 (2004-11-01), Yasui et al.
patent: 0 850 816 (1998-07-01), None
patent: 0 850 816 (1998-07-01), None
patent: 1 422 584 (2004-05-01), None
patent: 1 484 654 (2004-12-01), None
patent: 2004-248411 (2004-09-01), None

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