Leak detection system for a vehicle fuel tank

Details Leak detection system for a vehicle fuel tank Leak detection system for a vehicle fuel tank

2006-11-28

2006-11-28

Larkin, Daniel S. (Department: 2856)

Measuring and testing

With fluid pressure

Leakage

C073S04050R, C073S049700, C073S118040, C702S051000

Reexamination Certificate

active

07140235

ABSTRACT:
A leak detection system for a vehicle fuel tank includes a sensor that is responsive to a pressure within the fuel tank and that generates a pressure signal based thereon. A control module initiates an engine-off natural vacuum (EONV) test and determines a pressure change based on the pressure signal. The control module pauses the EONV test when the pressure change exceeds a pressure change threshold.

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