Device for diagnosing malfunction in a fuel tank
First Claim
1. A device for diagnosing malfunction in a fuel tank, said fuel tank having a separator wall therein which separates an interior of said tank into a fuel chamber and an air chamber said wall being deformable according to an amount of fuel in said fuel chamber, said device comprising:
- means for detecting a change of a concentration of fuel vapor in said fuel tank, andmeans for diagnosing malfunction of said separator wall on the basis of said change to diagnose that said separator wall has malfunction when said change differs from a predetermined regular change.
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Accused Products
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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Citations
9 Claims
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1. A device for diagnosing malfunction in a fuel tank, said fuel tank having a separator wall therein which separates an interior of said tank into a fuel chamber and an air chamber said wall being deformable according to an amount of fuel in said fuel chamber, said device comprising:
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means for detecting a change of a concentration of fuel vapor in said fuel tank, and means for diagnosing malfunction of said separator wall on the basis of said change to diagnose that said separator wall has malfunction when said change differs from a predetermined regular change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification