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The crankshaft speed sensor measures the speed, position, and (optionally) the direction of rotation of the crankshaft. Engine management systems use this data to control injection and/or ignition timing.
The sensor is a Hall or inductive sensor. The crankshaft is fitted with a pulse wheel which the sensor scans using a non-contact method. The reference point is determined by a missing element in the pulse wheel.
The Bosch crankshaft speed sensor supplies data for controlling the injection and/or ignition timing. It helps meet emissions limits and supports smooth engine operation for enhanced comfort.