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14:54 Apr 24, 2008
English to German translations [PRO] Tech/Engineering - Automotive / Cars & Trucks
English term or phrase:stuck-in-empty failure
Aus einer Patentbeschreibung:
System for Detecting Failures in Fuel Systems
FIELD OF THE INVENTION
The present disclosure relates to fuel level monitoring in a vehicle, and more particularly to monitoring a fuel level in a vehicle having primary and a secondary fuel tanks.
A fuel level sensor may improperly report that a corresponding fuel tank is at an empty state (i.e. ***stuck-in-empty failure***). If a stuck-in-empty failure occurs, a transfer pump that transfers fuel from the secondary fuel tank to the primary fuel tank may not operate. Therefore, the fuel in the secondary fuel tank will not be accessible to the engine.
A stuck-in-empty failure of the secondary fuel sensor may falsely enable and/or disable diagnostics such as an evaporative emission control (EVAP) monitor based on incorrect sensing of the fuel level in the secon-dary fuel tank.
The control module 40 executes a sensor diagnostic system of the present invention. The sensor diagnostic system detects and reports a ‘stuck-in-range” (e.g. stuck-in-empty) failure state of the secondary fuel level sensor 36 based on the primary and secondary fuel signals. In other words, the sensor diagnostic system determines whether the secondary fuel level sen-sor 36 is improperly sensing that the secondary fuel tank 28 is at an empty state. Although the present implementation describes a sensor di-agnostic system operating on the secondary fuel level sensor 36, those skilled in the art can appreciate that a sensor diagnostic system of the primary fuel level sensor 34 may function similarly to the sensor diagnos-tic system described herein.