Method for detecting the fuel level in the tank of a motor vehicle
First Claim
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1. A method for detecting and displaying outside the fuel level in the tank of a motor vehicle by means of apparatus which can output a signal indicative of the fuel level in the tank of the motor vehicle, comprising the steps of:
- memorizing for outside display a given value indicative of the fuel level in the tank of the motor vehicle, andupdating, at predetermined instants, said given value by detecting at least one newly measured value corresponding to said signal indicative of the fuel level in the tank of the motor vehicle output by said apparatus, calculating a weighted average value of said memorized value and said at least one newly measured value and memorizing said weight average value as an updated given value for outside display;
said updating of said given value being carried out at instants where said weighted average value is lower tha the given value previously memorized by a given amount while the ignition is in the "on" position and said updating of said given value being carried out to display a new value when the ignition is turned to the "on" position to reflect refilling of said tank a predetermined amount when the ignition was previously in the "off" position.
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Abstract
The level indicated on the instrument panel of the motor vehicle results from a processing operation, including the calculation of a weighted average value, whereby the effects of accidental phenomena such as agitation of the fuel within the tank during movement of the motor vehicle are dispensed with.
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Citations
13 Claims
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1. A method for detecting and displaying outside the fuel level in the tank of a motor vehicle by means of apparatus which can output a signal indicative of the fuel level in the tank of the motor vehicle, comprising the steps of:
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memorizing for outside display a given value indicative of the fuel level in the tank of the motor vehicle, and updating, at predetermined instants, said given value by detecting at least one newly measured value corresponding to said signal indicative of the fuel level in the tank of the motor vehicle output by said apparatus, calculating a weighted average value of said memorized value and said at least one newly measured value and memorizing said weight average value as an updated given value for outside display; said updating of said given value being carried out at instants where said weighted average value is lower tha the given value previously memorized by a given amount while the ignition is in the "on" position and said updating of said given value being carried out to display a new value when the ignition is turned to the "on" position to reflect refilling of said tank a predetermined amount when the ignition was previously in the "off" position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification