Automatic calibration method for a motor vehicle a camshaft sensor
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United States of America Patent
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May 9, 2017
Grant Date -
Jul 10, 2014
app pub date -
Jul 20, 2012
filing date -
Aug 4, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An automatic calibration method for a motor vehicle camshaft sensor, the vehicle having at least one camshaft, a toothed encoded target (or magnetic encoder) associated with this camshaft, and a magnetic field sensor placed near the target to detect magnetic field variations caused by the passage of the teeth of the target near the sensor, the sensor delivering signals corrected by a predetermined detection threshold K, the method including: continuously measuring the value of the magnetic field during at least one revolution of the target, determining the maximum amplitude Amax of the field measured during this revolution, determining the minimum amplitude Amin of the field measured during this revolution, finding the ratio of the amplitudes
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