Failure diagnostic apparatus for swirl control apparatus

Details Failure diagnostic apparatus for swirl control apparatus Failure diagnostic apparatus for swirl control apparatus

1996-06-19

1997-10-21

Dombroske, George M.

Measuring and testing

Simulating operating condition

Marine

73115, 731173, 731182, 340439, F02B 3100, F02D 4102, G01M 1500

Patent

active

056798911

ABSTRACT:
A region in which Tp<2.0 ms at which a negative pressure can be reliably assured is set is defined as a diagnostic region on the closed side of a solenoid valve. When the solenoid valve is controlled to be closed, and the pressure switch is in an ON state, it is determined that the solenoid valve or the like is abnormal. When the pressure switch is in an OFF state a predetermined time after the solenoid valve is controlled to be opened, it is determined that the pressure switch is abnormal. In a non-rotation state of the engine 1 in which a pressure in a negative-pressure air supply pipe is an atmospheric pressure, when the pressure switch is turned on, it is determined that the pressure switch is normal; and when the pressure switch is turned off, it is determined that the pressure switch is abnormal.

REFERENCES:
patent: 4823753 (1989-04-01), Murakami et al.
patent: 4972814 (1990-11-01), Matsuki et al.
patent: 4998518 (1991-03-01), Mitsumoto
patent: 5048496 (1991-09-01), Misumi et al.
patent: 5323748 (1994-06-01), Foster et al.
patent: 5537864 (1996-07-01), Sood

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