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A Configuration for a Continuously Variable Power-Split Transmission in Hybrid-Electric Vehicle Applications
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 08, 2004 by SAE International in United States
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Continuously variable transmissions (CVTs) are usually used in small vehicles due to power limitations on the variable elements. Continuously variable power-split transmissions (CVPST) were developed in order to reduce the fraction of power passing through the variable elements [1,2]. The configuration presented in this paper includes a planetary gear train (PGT), which in combination with the CVT allows the power to be split and therefore increase the power envelope of the system. The PGT also provides a branch that can be used in a hybrid electric vehicle (HEV) operation through an electric motor.
A conceptual design of a CVPST for a HEV is presented in this paper. The objectives are to show the different operational modes, with diagrams, perform a power analysis, develop the velocity and force equations and finally show the performance of the system with an example application.
The results of this conceptual design study may help to extend CVT applications in the automotive industry for light duty applications such as pickup trucks and Sport Utility Vehicles (SUV).
- Miguel M. Gomez - Department of Mechanical and Aerospace Engineering West Virginia University
- Victor H. Mucino - Department of Mechanical and Aerospace Engineering West Virginia University
- Nigel Clark - Department of Mechanical and Aerospace Engineering West Virginia University
- James E. Smith - Department of Mechanical and Aerospace Engineering West Virginia University
CitationGomez, M., Mucino, V., Clark, N., and Smith, J., "A Configuration for a Continuously Variable Power-Split Transmission in Hybrid-Electric Vehicle Applications," SAE Technical Paper 2004-01-0571, 2004, https://doi.org/10.4271/2004-01-0571.
- Per Mattson 1993 Continuously variable split-power transmissions with several modes Variable transmission paper collection Machine Design Department at Chalmers University of Technology
- Mucino Victor H. Smith James E. Cowan Ben Kmicikiewicz Marek 1997 A continuously variable power split transmission for automotive applications SAE paper 970687
- Kmicikiewicz M. Cowan B. Mucino V. H. 2000 “Continuously variable power-split transmission concept (CVPST) in hybrid vehicles” Powertrain International 3 4 16 19
- Anders Bonthron 1990 CVT-efficiency measured under dynamic running conditions SAE paper 850569
- Hsieh L. Yan H. 1990 On the mechanical efficiency of continuously variable transmissions