Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
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.
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McLain Kurt D.
Wang Wenbo
GM Global Technology Operations Inc.
Kwon John T.
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