Fuzzy logic based cam phaser control

Details Fuzzy logic based cam phaser control Fuzzy logic based cam phaser control

2008-04-08

2008-04-08

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C701S102000, C701S105000, C701S106000, C701S115000, C706S003000, C706S004000, C706S900000

Reexamination Certificate

active

11218850

ABSTRACT:
A method of controlling a valve of a cam phaser of an internal combustion engine includes determining a delta duty cycle from a position error and a rate of change of error (error dot). A fuzzy gain value is calculated from the delta duty cycle and a correction term. A duty cycle is calculated from an integral gain value and the fuzzy gain value. The duty cycle is then used to control the valve of the cam phaser.

REFERENCES:
patent: 5937806 (1999-08-01), Lyko et al.
patent: 6760658 (2004-07-01), Yasui et al.
patent: 7059285 (2006-06-01), Schafer et al.
patent: WO 2004007919 (2004-01-01), None

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