Controller

Details Controller Controller

2007-04-24

2007-04-24

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

Reexamination Certificate

active

10566237

ABSTRACT:
A control system which is capable of enhancing the accuracy of control, when the output of a controlled object is controlled with a control algorithm to which is applied a modulation algorithm based on one of a Δ modulation algorithm, a ΔΣ modulation algorithm, and a ΣΔ modulation algorithm, even if the absolute value of an input value to the modulation algorithm continues to be larger than 1 for a long time. The control system1for controlling the cam phase Cain of an intake cam5includes an ECU2. The ECU2calculates a limited value deviation r2for control of the cam phase Cain by equations (1) to (10), modulates the limited value deviation r2with an algorithm expressed by equations (11) to (13) based on the ΔΣ modulation algorithm to thereby calculate a modulation output u″ as a predetermined value ±R (R>|r2|), and calculates a control output Vcain to the electromagnetic variable cam phase mechanism30based on the predetermined value ±R (steps5and6).

REFERENCES:
patent: 4064846 (1977-12-01), Latsch et al.
patent: 6856891 (2005-02-01), Yasui
patent: 2003-108202 (2003-04-01), None
patent: 2003-195908 (2003-07-01), None
patent: 2003-214227 (2003-07-01), None
patent: 2004-100652 (2004-04-01), None

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