Device for diagnosing malfunction in a fuel tank

Details Device for diagnosing malfunction in a fuel tank Device for diagnosing malfunction in a fuel tank

1997-12-24

1999-07-20

Raevis, Robert

Measuring and testing

With fluid pressure

Leakage

G01M 304

Patent

active

059258179

ABSTRACT:
According to the present invention, there is provided a device for diagnosing malfunction in a fuel tank. The fuel tank has a separator wall therein which separates an interior of the fuel tank into a fuel chamber and an air chamber. The separator wall is deformable according to an amount of fuel in the fuel chamber. The device comprises a device for detecting a change of at least one of a position of the separator wall, the pressure in the tank and the concentration of fuel vapor in the tank, and a device for diagnosing malfunction of the separator wall on the basis of the change to diagnose that the separator wall has malfunction when the change differs from a predetermined regular change.

REFERENCES:
patent: 3617034 (1971-11-01), Skinner
patent: 3701540 (1972-10-01), Pringle

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