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

1999-03-04

2000-12-19

Raevis, Robert

Measuring and testing

With fluid pressure

Leakage

G01M 332

Patent

active

061614246

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.

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patent: 5722374 (1998-03-01), Kidokoro et al.
patent: 5746185 (1998-05-01), Kidokoro et al.
patent: 5746186 (1998-05-01), Kidokoro

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