METHOD FOR ADAPTING A DETECTION THRESHOLD OF A CRANKSHAFT SENSOR FOR MOTOR VEHICLE

Disclosed is a method for adapting a detection threshold (S1) of a magnetic field sensor for a crankshaft of a motor vehicle equipped with the "stop & go" function, the sensor delivering a signal (B) of variations of magnetic field having two states, such as: State 1: when the cranksha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LARUE MARIE-NATHALIE, MIRASSOU DAVID
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	Disclosed is a method for adapting a detection threshold (S1) of a magnetic field sensor for a crankshaft of a motor vehicle equipped with the "stop & go" function, the sensor delivering a signal (B) of variations of magnetic field having two states, such as: State 1: when the crankshaft is rotating: the signal includes rising fronts and falling fronts, State 2: when the crankshaft is stopped: the signal has an aperiodic progressive drift ( TAR). The method includes for state 2 steps making it possible to estimate the variation ( 1, 2, 3, 4 . . . i) of the value (V1, V2 . . . Vi) of the signal (B) during the stopped phase of the crankshaft in order to adapt the detection threshold (S1) to a new value (S4) applicable for the detection of the first tooth upon restart of the engine (R).