Patent ID: 11959547
Assignee: ZF CV SYSTEMS GLOBAL GMBH
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 16:
17. A sensor arrangement (46) for an automated transmission, comprising:
a shifting device (2) including multiple shift rails (4, 14, 24, 34), which are arranged so as to be axially parallel to one another and which are axially displaceable by associated shift actuators (8, 18, 28, 38),
wherein the sensor arrangement (46) includes multiple displacement sensors (48, 56, 64, 72),
wherein each of the displacement sensors comprises a signal transmitter (50, 58, 66, 74) attached to one of the shift rails (4, 14, 24, 34) and a signal receiver (52, 60, 68, 76) fixedly arranged on a housing,
wherein the signal transmitters (50, 58, 66, 74) are each in the form of a permanent magnet having magnetic poles,
wherein the signal receivers (52, 60, 68, 76) are each in the form of a 3D Hall sensor, and
wherein the signal receivers (52, 60, 68, 76) are each connected to an electronic transmission control unit (44) via electrical sensor lines (54, 62, 70, 78),
wherein the signal transmitters (50, 58, 66, 74) are arranged having an identical axial alignment of their magnetic poles (N, S), and
wherein the signal receivers (52, 60, 68, 76) are arranged in a common plane (80) that is horizontal in an installation position of the signal receivers;
wherein the ECU forms a mean value of the sensor signals and defines an inner tolerance range about the mean value and an outer interference range about the mean value that is greater than the inner tolerance range, and wherein the ECU establishes an observation period including a most recently detected sensor signal.