Patent
Full-time transfer case with syncronized range shift arrangement
Thomas C. Bowen
- 05 Jan 1998
78
TL;DR: In this paper, a power transfer system for a four-wheel drive vehicle is presented for permitting a vehicle operator to select between various full-time and part-time 4WD modes.
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Abstract: A power transfer system is disclosed for a four-wheel drive vehicle operable for permitting a vehicle operator to select between various full-time and part-time four-wheel drive modes. The power transfer system includes a dualplanetary gear reduction unit that is operable for establishing high-range and low-range speed ratios, and a synchronized range shift mechanism that is adapted to permit the vehicle operator to shift on-the-fly for establishing full-time and part-time high-range and low-range four-wheel drive modes. The power transfer system includes an slip limiting/torque-biasing arrangement including an interaxle differential and a transfer clutch operable for controlling the magnitude of speed differentiation and torque biasing across the interaxle differential.
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Citations
Patent
Bi-directional axially applied pawl clutch assembly
Matthew Thomas
- 13 Feb 2003
TL;DR: In this article, a bi-directional overrunning clutch assembly including a drive member (12, 112, 212 ) and a pair of driven members (14, 16, 114, 116, 214, 216 ) is presented, where each one of the driven members is in side-by-side confronting relationship with the drive member.
66
Patent
Method and apparatus for providing synchronization of low to high shifts in a transfer case
Gary A. Oliveira,Richard Thomas Fosmoe,John R. Ficht +2 more
- 02 Apr 2001
TL;DR: In this paper, a method to digitally control a transfer case through a digital data bus to provide synchronized low to high shift capabilities in vehicles that employ a controller area network (CAN) system is presented.
60
Patent
On-demand transfer case with integrated sprocket and bi-directional clutch assembly
Randolph C. Williams
- 31 Jan 2003
TL;DR: An on-demand two speed transfer case (20) is equipped with a planetary gearset assembly (42) and a range shift mechanism (44) to provide high-range and low-range drive connections as mentioned in this paper.
49
Patent
Synchronized range shift mechanism for transfer case
Randolph C. Williams
- 23 Jul 1999
TL;DR: In this article, a transfer case for a four-wheel drive vehicle having a planetary gear assembly and a synchronized range clutch which can be selectively shifted on-the-move establishing high-range and low-range drive modes is presented.
43
Patent
Coupling device which is disposed between left and right wheels of vehicle
Aoki Jun
- 27 Mar 1998
TL;DR: In this article, a coupling device which is disposed between left and right wheels of a vehicle is provided, in which a pair of differential gears are provided, and a third rotational element of one of the differential gears is driven for rotation by a driving source.
39
References
Patent
Rotary actuation mechanism for torque modulated transfer case
Robert J. Wilson,David Sperduti,Richard E. Eastman,Neville K. Divecha,Joseph A. Winks +4 more
- 10 Mar 1993
TL;DR: In this paper, an improved "on-demand" power transfer system of the type having a transfer mechanism incorporated into the driveline of a four-wheel drive vehicle is presented.
92
Patent
Coupling apparatus for full time four wheel drive
Courtney F. Dolan,Thurman O. Ruettinger +1 more
- 29 Nov 1974
TL;DR: In this paper, a four wheel drive train including a transfer case adapted to provide full-time four-wheel drive is presented, and a differential is provided in the transfer case.
83
Patent
Snap-action arrangement for transfer case synchronizer
Barry L. Frost
- 05 Jun 1987
TL;DR: In this paper, a spring-assisted transfer case fork assembly for shifting a synchronizer clutch sleeve from its neutral position to complete lockup of its internal splines with external splines on a transmission shaft speed-change gear is presented.
74
Patent
Transfer case limited slip planetary differential
Randolph C. Williams,Richard E. Eastman,S. K. Varma +2 more
- 23 Apr 1991
TL;DR: In this article, a transfer case for a four wheel drive vehicle providing a central shaft defining a first output concentrically surrounded by a forward high/low drive range gear set and an aft dual planetary inter-axle differential gear set is presented.
69
Patent
Four wheel drive transfer case with clutch mechanism
Mark J. Fogelberg
- 06 Oct 1986
TL;DR: In this article, a four wheel drive transfer case with a three element planetary gear differential connected to the output shaft of a transmission and two output shafts which are driven by the differential in a manner such that rotary motion of any one shaft effects rotary motions of the other shafts in a predetemined timed relationship is presented.
68