Patent
Multi-speed offset transfer case
Baxter Jun Ralph W
- 18 Aug 1997
22
TL;DR: In this article, a multi-speed offset transfer case for a four-wheel drive motor vehicle having a plural stage torque transfer and speed changing mechanism which provides four (4) or more output speeds for each input speed.
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Abstract: A multi-speed offset transfer case for a four (4) wheel drive motor vehicle having a plural stage torque transfer and speed changing mechanism which provides four (4) or more output speeds for each input speed. A modified planetary gear assembly forms the first stage and provides selectively either speed reduction or an output speed which is equal to the input speed. This planetary gear assembly receives torque from an input shaft and includes a sun gear in driven engagement with the input shaft, a planetary gear carrier which supports a plurality of planet gears and a ring gear. The planetary gear carrier includes an output sleeve, which is preferably an integral part of the planetary gear carrier. An actuator for the planetary gear assembly includes a first shift collar which is capable of grounding the ring gear so that it will not rotate, thereby causing the planetary gear carrier to be driven at a lower angular speed than the input shaft, and a second shift collar which locks the planetary gear carrier to the ring gear so that both rotate at the same angular speed as the input shaft. The second stage includes two (2) or more chain drives which are engaged alternately, providing two (2) or more output speeds for each input speed. This makes it possible to obtain four (4) or more output speeds ranging from a deep reduction to overdrive.
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Citations
Patent
Transfer case for hybrid vehicle
Fred C. Porter
- 05 Dec 2001
TL;DR: In this paper, a hybrid drive system for a four-wheel drive system arranged to supply motive power to a primary output shaft of a transfer case from an internal combustion engine and to a secondary output shaft from an electric motor/generator is presented.
36
Patent
Three-speed transfer case
Barry L. Frost
- 23 Mar 2001
TL;DR: In this article, a transfer case consisting of an input shaft, an output shaft, and a planetary gearset is connected thereby by a power-shift clutches assembly, which is controlled by a hydraulic control system for shifting each of the clutches between actuated and non-actuated modes to establish three different speed ratio drive connections between the input and output shafts.
32
Patent
Electrically-driven transfer case with power take-off
David Wenthen
- 06 Aug 2007
TL;DR: In this article, a hybrid drive system for a four-wheel drive system arranged to supply motive power to a first output shaft of a transfer case from an internal combustion engine and to a second output shaft from an electric motor/generator was presented.
25
Patent
Four-wheel drive hybrid vehicle
Fred C. Porter
- 07 Sep 2006
TL;DR: In this article, a hybrid drive system for a four-wheel drive system arranged to supply motive power to a primary output shaft of a transfer case from an internal combustion engine and to a secondary output shaft from an electric motor/generator is presented.
21
Patent
Snowmobile planetary drive system
Raymond A. Schoenfelder,Dennis Zulawski +1 more
- 27 Sep 2001
TL;DR: In this paper, a reduction drive system including planetary gears is described for a snowmobile with a reversing unit and an offset is provided in the drive system, where the reverse unit is used to compensate for the offset.
21
References
Patent
Power transfer device for four-wheel drive
Kan Sasaki,Keisuke Takimura,Nobuaki Katayama +2 more
- 22 May 1987
TL;DR: In this article, a power transfer device consisting of a transfer casing detachably secured to a transmission casing, a first differential rotatable within the transmission casing and having a first gear casing driven by an output gear of the transmission, a second differential coaxial with the first differential having a second gear casing integral with an output element of the first component and rotating within the first gear, a carrier member rotatably mounted within the transfer casing and arranged coaxially with first and second differentials.
67
Patent
Relative guidance using the global positioning system
Mark Youhanaie
- 20 Sep 1993
TL;DR: In this article, a method for guiding a vehicle (30) to a target (28) by using a first global positioning system (GPS) receiver (24) fixed to receive global positioning signals from a selected constellation (46) of GPS satellites in orbit above the earth and a second GPS receiver (32) having a second global positioning receiver fixed to get global positioning signal from the same selected constellation of satellites of the GPS satellites is proposed.
49
Patent
Two-wheel drive mode for full-time transfer case
Barry L. Frost
- 16 Nov 1989
TL;DR: In this article, a transfer case for a four wheel drive vehicle providing a drive range planetary gear set selectively positionable at a low speed output position, a high-speed output position and a neutral position is presented.
39
Patent
Speed reduction assembly with full disconnect for transfer cases and the like
Dan J. Showalter
- 16 Apr 1998
TL;DR: In this paper, a two speed planetary gear assembly and double disconnect mechanism for a motor vehicle transfer case or similar device achieves full decoupling of the speed reduction assembly from the power path when either neutral or the high speed gear ratio, typically direct drive, is selected.
38
Patent
Transmission for four-wheel drive vehicles
Larry A. Pritchard,Parvinder Ahluwalia +1 more
- 21 Jul 1997
TL;DR: In this article, a multi-speed geartrain comprised of an input shaft, a mainshaft, and a plurality of constant-mesh gearsets arranged for selectively coupling the mains-haft to the input shaft for driven rotation at various speed ratios.
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