DEVICE FOR DETECTING SPEED OF A ROTATABLE ELEMENT, METHOD AND VEHICLE
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United States of America Patent
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Oct 7, 2015
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Oct 23, 2014
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Abstract
A device for detecting and monitoring crank shaft rotary speed and position in a four stroke engine, wherein a first and a second sensor are arranged to sense passage of reference marks on a rotatable element or elements. The first sensor is a high precision sensor which is arranged to sense passage of reference marks on a crank shaft flywheel of the engine, and the second sensor is a low speed sensor which is arranged to sense passage of reference marks on the crank shaft flywheel or reference marks or a wheel being associated with a cam shaft of the engine. The invention also concerns a method and a vehicle.
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