System for detecting failures in fuel systems
AssigneeGM Global Technology Operations LLC
InventorsZhong Wang, John F. Van Gilder, Gary L. Rogers, Scott A. Kegebein, Wenbo Wang
Life of this patent
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Abstract
A diagnostic system and method for detecting failures in a fuel system of a vehicle includes a fuel level monitoring module that determines a first change in a first fuel level of a first fuel tank based on data received from a first fuel level sensor and determines a second change in a second fuel level of a second fuel tank based on data received from a second fuel level sensor. A sensor diagnosing module evaluates operation of the second fuel level sensor based on the first change in the first fuel level.
Claims18
A diagnostic system for detecting failures in a fuel system of a vehicle, comprising:
- a fuel level monitoring module that:
- determines a first change in a first fuel level of a first fuel tank based on data received from a first fuel level sensor;
- and
- determines a second change in a second fuel level of a second fuel tank based on data received from a second fuel level sensor;
- and
- a sensor diagnosing module that evaluates operation of said second fuel level sensor based on said first change in said first fuel level,
- wherein said sensor diagnosing module determines a fault state of said second fuel level sensor when said first change exceeds a variation threshold and said second fuel level is one of less than and equal to an empty threshold.
A diagnostic system for detecting failures in a fuel system of a vehicle, comprising:
- a fuel level monitoring module that:
- determines a first change in a first fuel level of a first fuel tank based on data received from a first fuel level sensor;
- and
- determines a second change in a second fuel level of a second fuel tank based on data received from a second fuel level sensor;
- and
- a sensor diagnosing module that evaluates operation of said second fuel level sensor based on said first change in said first fuel level,
- wherein said fuel level monitoring module determines said second change in said second fuel level when at least one of said first change fails to exceed a variation threshold and said second fuel level exceeds an empty threshold.
A diagnostic method for detecting failures in a fuel system of a vehicle, comprising:
- determining a first change in a first fuel level of a first fuel tank based on data received from a first fuel level sensor;
- determining a second change in a second fuel level of a second fuel tank based on data received from a second fuel level sensor;
- evaluating operation of said second fuel level sensor based on said first change in said first fuel level;
- and
- determining a fault state of said second fuel level sensor when said first change exceeds a variation threshold and said second fuel level is one of less than and equal to an empty threshold.
A diagnostic method for detecting failures in a fuel system of a vehicle, comprising:
- determining a first change in a first fuel level of a first fuel tank based on data received from a first fuel level sensor;
- determining a second change in a second fuel level of a second fuel tank based on data received from a second fuel level sensor;
- evaluating operation of said second fuel level sensor based on said first change in said first fuel level;
- and
- determining said second change in said second fuel level when at least one of said first change fails to exceed a variation threshold and said second fuel level exceeds an empty threshold.
Dependencies are inferred from the claim text.