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An All Wheel Drive System Utilizing Twin Hydraulic Couplings with Gerodisc System
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Abstract
Hydraulically actuated, friction disc type couplings are capable of being utilized as direct drive limited slip devices for use on auxiliary drive axles. These couplings can be excited to function at wheel speed Δn levels due to their high torque transfer density and high torque transfer capacity.
The utilization of these hydraulic couplings eliminates the need for torque multiplication through speed reduction. The common differential element is replaced by two independent, but communicating couplings to facilitate direct drive of the wheels on the auxiliary axle.
The arrangement described in this paper provides a built in limited slip differential (LSD) effect as well as a simple and powerful all wheel drive (AWD) system. This paper will compare the performances of such systems with classic architectures under various driving conditions.
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Citation
Okcuoglu, M., "An All Wheel Drive System Utilizing Twin Hydraulic Couplings with Gerodisc System," SAE Technical Paper 973235, 1997, https://doi.org/10.4271/973235.Also In
References
- Lanzer H. Passenger Car four wheel drive (4WD)-Systems for Light Trucks? SAE Technical paper No 952647 1995
- Okcuoglu M. A Descriptive Analysis of Gerodisc type limited slip differentials and all wheel drive couplings SAE Technical paper No. 952642 1995
- Mohan S. Williams R. A survey of 4WD traction control systems and strategies SAE Technical paper No. 952644 1995
- Okcuoglu M. Adjustable racing limited slip differentials utilizing Gerodisc system SAE Technical paper No. 962541 1996