Transfer case friction plate synchronizer

Details Transfer case friction plate synchronizer Transfer case friction plate synchronizer

1995-03-08

1997-03-25

Pitts, Andrea L.

192 clutches and power-stop control

Clutches

Progressive engagement

192 531, 192 7022, 74665F, 74665GE, F16D 1354

Patent

active

056135874

ABSTRACT:
A friction plate synchronizer/brake apparatus for use in a drivetrain subassembly such as a four-wheel drive transfer case. The apparatus provides a relatively small and lightweight apparatus that may be used to facilitate transfer case range shift operations by smoothly eliminating residual rotation of the transfer case input shaft caused by torque converter drag. Elimination of the torque converter drag allows the transfer case output drive shaft to be coupled to the transfer case input shaft or to the associated planetary gear assembly without excessive noise, vibration, or wear on the transfer case components. The apparatus also provides a relatively small and lightweight apparatus to be used in a four-wheel drive transfer case to facilitate smooth "on the fly" shifting between two-wheel and four-wheel drive modes of operation. The apparatus synchronizes the rotational speeds of a transfer case drive shaft and the four-wheel drive sprocket mounted about the drive shaft, allowing the direct engagement of these components without excessive noise, vibration and wear on the associated components.

REFERENCES:
patent: 4047602 (1977-09-01), Crankshaw
patent: 4131185 (1978-12-01), Schall
patent: 4369671 (1983-01-01), Matsumoto et al.
patent: 4422349 (1983-12-01), Matsumoto et al.
patent: 4649771 (1987-03-01), Atkinson et al.
patent: 4920828 (1990-05-01), Kameda et al.
patent: 5380255 (1995-01-01), Brissenden et al.

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