This paper presents an analytic method for the determination of the gear ratios of an epicyclic-type transmission mechanism for a given set of speed ratios. For the transmission mechanism with the associated clutching sequence table, the overall speed ratios are first derived and expressed in terms of the gear ratios of all the mating gears using the concept of fundamental geared entities. Next, the associated speed ratio relations are derived as a criterion to detect the feasibility of any given set of speed ratios. Finally, the transmission mechanism is decomposed into a system of fundamental geared entities such that the gear ratios of all the mating gears are determined from given speed ratios in an analytic way.
Issue Section:
Technical Briefs
1.
Gott, P. G., 1991, “Changing Gears,” Society of Automotive Engineers, Inc., Warrendale, Pennsylvania.
2.
Tsai, L. W., Maki, E. R., Liu, T., and Kapil, N. G., 1988, “The Categorization of Planetary Gear Trains for Automatic Transmissions According to Kinematic Topology,” SAE Technical Paper No. 885062.
3.
Chatterjee, G., and Tsai, L. W., 1994, “Enumeration of Epicyclic-type Automatic Transmission Gear Trains,” SAE Technical Paper No. 941012.
4.
Mogalapalli, S. N., Magrab, E. B., and Tsai, L. W., 1993, “A CAD System for the Optimization of Gear Ratios for Automotive Automatic Transmissions,” SAE Technical Paper No. 930675.
5.
Hsieh
, H. I.
, and Tsai
, L. W.
, 1996
, “Kinematic Analysis of Epicyclic-type Transmission Mechanisms Using the Concept of Fundamental Geared Entities
,” ASME J. Mech. Des.
, 118
, pp. 294
–299
.6.
Hsieh, L. C., 1999, “Method for the Kinematic Design of Multi-Speed Automatic Transmissions,” Proceedings of the Tenth World Congress on the Theory of Machine and Mechanism, Vol. 5, pp. 2374–2379, Oulu, Finland.
Copyright © 2002
by ASME
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