An Analysis of Viscous Coupling Torque Transmission Characteristics and Hump Phenomenon 900558
Viscous couplings have started to find widespread use in automobiles in recent years and it is important to have a good understanding of their torque transmission characteristics. This paper presents the results of transmitted torque calculations, which took into account temperature changes in viscous coupling components, and the findings of experiments carried out to verify the calculations. The results obtained made it possible to predict quantitatively the degree of influence that various factors have on the torque transmission performance of a viscous coupling.
In addition, a mechanism is proposed for explaining the occurrence of the torque hump phenomenon. A calculation model was developed on the basis of this mechanism and used to calculate torque hump characteristics and the interval from the onset of viscous coupling operation to the occurrence of a hump. The calculated results are shown to correlate well with experimental data.
Citation: Takemura, T. and Niikura, Y., "An Analysis of Viscous Coupling Torque Transmission Characteristics and Hump Phenomenon," SAE Technical Paper 900558, 1990, https://doi.org/10.4271/900558. Download Citation
Author(s):
Toji Takemura, Yasuhiro Niikura
Affiliated:
Nissan Motor Co., Ltd
Pages: 12
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE Transactions Journal of Passenger Cars-V99-6
Related Topics:
Transmissions
Starters and starting
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
