Hall effect transfer case shift mechanism position sensor

Details Hall effect transfer case shift mechanism position sensor Hall effect transfer case shift mechanism position sensor

1996-08-30

1999-02-02

Mullen, Jr., Thomas J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

74473R, 74335, 74DIG7, 200 6191, B60Q 100

Patent

active

058670920

ABSTRACT:
A shift mechanism position sensor for a transfer case or transmission includes a plurality of Hall effect sensors disposed adjacent a ferrous, metallic plate having a plurality of apertures arranged to provide multi-bit binary signals in gray code. The metallic plate is secured to an internal component such as a shift control rod of the transfer case or transmission and translates bi-directionally adjacent the Hall effect sensors. Data coded in numerous distinct three or four bit binary numbers provides high resolution of the position of the shift mechanism, shift fork and associated clutch. Many four wheel drive motor vehicle transfer cases include a gear reduction assembly which provide direct and reduced speed drives. Such gear selection is often achieved by an electronic control system and it is important to provide information regarding the actual physical position of such gear selection mechanism to the control system. The Hall effect sensors and apertured plate are preferably disposed within the transfer case or transmission and provide accurate and well defined information to the control system.

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