Reference sensors
05-12-2010, 06:18 PM
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They are Hall Effect proximity sensors. Very much like ABS wheel speed sensors. They are mounted a set distance from the flywheel. When a flywheel tooth passes by (for the speed sensor) a tiny signal is generated. The DME reads this and calculates engine speed. The reference sensor reads a stud that screws into the flywheel. When this passes by, the DME reads that as TDC.
05-12-2010, 06:42 PM
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