Speed sensor, function - GF27.19-P-5127-04P

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Transmission 722.9 in model 171.4, 203, 209, 211, 215, 219, 220, 230, 463.303/340/341 internal speed sensor

Fig 1: Identifying Internal Speed Sensor Location - Transmission 722.9

A permanently magnetized pole wheel (cylinder flange with integrated ring magnet (2)) and the internal speed sensor (VGS) (Y3/8n2), which consists of magneto-resistive elements, are used to record the internal transmission speed. A magneto-resistive element changes its resistance under the influence of a magnetic field. The cylinder flange with integral ring magnet (2) is connected to the ring gear of the single rear planetary gear system.

Magnetic field changes occur due to the rotary motion of the ring gear and as a result a resistance change occurs in the magneto-resistive elements An electronic analysis system transmits this information to the fully integrated transmission control (VGS) control unit (Y3/8n4). By using this speed recording system the measurement can take place over a greater distance than with the Hall sensor.