Charge motion control valve fuzzy logic diagnostic

Details Charge motion control valve fuzzy logic diagnostic Charge motion control valve fuzzy logic diagnostic

2007-12-04

2007-12-04

Kwon, John T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S347000

Reexamination Certificate

active

11402733

ABSTRACT:
A method of diagnosing a malfunction of a charge motion control valve coupled to an intake manifold of an internal combustion engine is provided. The method includes: commanding the valve to at least one of close and open; determining a pressure range using fuzzy logic based on a mass of air flowing into the intake manifold and a temperature of the air flowing into the intake manifold; determining a change in absolute pressure of the intake manifold; comparing the change in absolute pressure to the pressure range; and diagnosing a malfunction of the valve when the change in absolute pressure is within the pressure range.

REFERENCES:
patent: 5720258 (1998-02-01), Tolkacz et al.
patent: 6968826 (2005-11-01), Doering
patent: 7051705 (2006-05-01), Doering
patent: 2004/0089267 (2004-05-01), Doering
patent: 2004/0204813 (2004-10-01), Doering
patent: 2006/0212209 (2006-09-01), Cesario et al.

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