Patent number: 11959547
Abstract: A sensor arrangement (46) for an automated transmission includes multiple axially parallel shift rails (4, 14, 24, 34) being axially displaceable by associated shift actuators (8, 18, 28, 38). The sensor arrangement (46) has multiple displacement sensors (48, 56, 64, 72) made up of a signal transmitter (50, 58, 66, 74) attached to a shift rail and a signal receiver (52, 60, 68, 76) fixedly arranged on a housing. The signal transmitters are in the form of a permanent magnet, and the signal receivers are in the form of a 3D Hall sensor. To detect an external magnetic interference field, which can corrupt the sensor signals from the displacement sensors (48, 56, 64, 72), the signal transmitters (50, 58, 66, 74) have identical axial alignments of their magnetic poles, and the signal receivers (52, 60, 68, 76) are in a common plane (80) that is horizontal in their installation position.
Type:
Grant
Filed:
September 27, 2021
Date of Patent:
April 16, 2024
Assignee:
ZF CV Systems Global GmbH
Inventors:
Dennis Reimann, Stefan Groetzinger, Robert Sohn
Publication number: 20230366462
Abstract: A sensor arrangement (46) for an automated transmission includes multiple axially parallel shift rails (4, 14, 24, 34) being axially displaceable by associated shift actuators (8, 18, 28, 38). The sensor arrangement (46) has multiple displacement sensors (48, 56, 64, 72) made up of a signal transmitter (50, 58, 66, 74) attached to a shift rail and a signal receiver (52, 60, 68, 76) fixedly arranged on a housing. The signal transmitters are in the form of a permanent magnet, and the signal receivers are in the form of a 3D Hall sensor. To detect an external magnetic interference field, which can corrupt the sensor signals from the displacement sensors (48, 56, 64, 72), the signal transmitters (50, 58, 66, 74) have identical axial alignments of their magnetic poles, and the signal receivers (52, 60, 68, 76) are in a common plane (80) that is horizontal in their installation position.
Type:
Application
Filed:
September 27, 2021
Publication date:
November 16, 2023
Inventors:
Dennis Reimann, Stefan Groetzinger, Robert Sohn