Fault determination device and method of negative pressure...

Details Fault determination device and method of negative pressure... Fault determination device and method of negative pressure...

2007-06-13

2009-12-01

Tran, Khoi (Department: 3664)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle diagnosis or maintenance indication

C701S101000, C701S102000, C701S103000, C123S200000, C123S205000, C123S207000, C123S208000, C123S319000, C123S332000, C123S333000, C123S339100, C123S339120, C123S339190, C477S121000, C475S001000, C475S002000, C475S006000

Reexamination Certificate

active

07627407

ABSTRACT:
An ECU determines the presence/absence of a fault of a negative pressure generation device that has an ejector that generates a negative pressure that is greater than the negative pressure that is to be extracted from an intake manifold of an internal combustion engine, and a VSV that causes the ejector to function or stop functioning. The ECU includes a presence/absence-of-abnormality determination portion that determines the presence/absence of an abnormality of the negative pressure generation device on the basis of variation of the rotation speed Ne of the internal combustion engine in accordance with change in the state of operation of the VSV.

REFERENCES:
patent: 5526793 (1996-06-01), Johansson
patent: 2007/0180852 (2007-08-01), Sugiura et al.
patent: 09317700 (1997-12-01), None
patent: A 2005-188332 (2005-07-01), None
English abstract of JP 09317700.

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