Fuzzy logic air/fuel controller

Details Fuzzy logic air/fuel controller Fuzzy logic air/fuel controller

1994-01-19

1996-06-11

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

36443105, F02D 4114

Patent

active

055245994

ABSTRACT:
A fuzzy logic controller for determining the air/fuel ratio of air and fuel to be delivered to an engine. The fuzzy logic controller has four input signals, two based on an air/fuel ratio feedback measurement, one based on throttle position, and one based on vehicle speed. The controller uses these inputs to obtain an "error" signal and its derivative, which are each converted to fuzzy antecedents for an inferential rule set. Application of the rule set produces at least one fuzzy output, which is defuzzified to produce a desired air/fuel ratio.

REFERENCES:
patent: 4492211 (1985-01-01), Shimomura et al.
patent: 4881505 (1989-11-01), Tomisawa
patent: 4889099 (1989-12-01), Tomishawa
patent: 4926826 (1990-05-01), Nakaniwa et al.
patent: 5001643 (1991-03-01), Domino et al.
patent: 5065728 (1991-11-01), Nakaniwa
Dr. H. Kong, "Engine Control: In Search of an Inexact Solution", Technology Today, Sep. 1991.
Ashok Nedungadi, Dennis J. Wenzel, "A Novel Approach to Robot Control Using Fuzzy Logic", Aug. 2, 1991.

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