Sensors bias detection for electronic returnless fuel system
AssigneeGM Global Technology Operations LLC
InventorsYOUSSEF A. GHONEIM, MARK N. HOWELL
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Abstract
A method for isolating an actual sensor bias in a fuel delivery system having a fuel pump includes monitoring first, second and third fuel pump parameters, detecting first and second fuel pump sensor biases based on the monitored first, second and third fuel pump parameters, modeling a fourth fuel pump modeled parameter based on the monitored second and third fuel pump parameters, and isolating the actual sensor bias in one of the detected first and second fuel pump biases based on the monitored third fuel pump parameter and the modeled fourth fuel pump modeled parameter.
Claims20
Method for isolating an actual sensor bias in a fuel delivery system having a fuel pump comprising:
- monitoring first, second and third fuel pump parameters;
- detecting first and second fuel pump sensor biases based on the monitored first, second and third fuel pump parameters;
- modeling a fourth fuel pump modeled parameter based on the monitored second and third fuel pump parameters;
- and
- isolating the actual sensor bias in one of the detected first and second fuel pump biases based on the monitored third fuel pump parameter and the modeled fourth fuel pump modeled parameter.
Method for isolating an actual sensor bias in an electronic returnless fuel delivery system having a fuel pump including a pressure sensor and a current sensor comprising:
- monitoring a pump pressure, a pump current and a pump voltage;
- detecting biases in the current sensor and the pressure sensor based on the monitored pump pressure, the monitored pump current and the monitored pump voltage;
- modeling an angular pump speed based on the monitored pump pressure and the monitored pump voltage;
- determining an unbiased angular pump speed based on the monitored pump voltage,
- comparing the modeled angular pump speed and the unbiased angular pump speed;
- determining a change in angular pump speed based on a difference between the modeled angular pump speed and the unbiased angular pump speed;
- and
- isolating an actual sensor bias in one of the detected biases in the current sensor and the pressure sensor and isolating a fictitious sensor bias in the other one of the detected biases in the current sensor and the pressure sensor based on the determined change in the angular pump speed.
An apparatus for isolating an actual sensor bias in an electronic returnless fuel delivery system including a first sensor and a second sensor comprising:
- an internal combustion engine;
- and
- an electronic returnless fuel delivery system comprising:
- a fuel tank;
- a fuel pump positioned within the fuel tank and supplying fuel from the fuel tank to the engine;
- and
- a controller in communication with the fuel pump monitoring first, second and third fuel pump parameters,
- detecting first and second fuel pump sensor biases based on the monitored first, second and third fuel pump parameters,
- modeling a fourth fuel pump modeled parameter based on the monitored second and third fuel pump parameters, and
- isolating the actual sensor bias in one of the detected first and second fuel pump biases based on the monitored third fuel pump parameter and the modeled fourth fuel pump modeled parameter.
Dependencies are inferred from the claim text.