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4x4 SUV Energy Efficiency and Mobility: Hybrid-Electric Transfer Case vs Mechanical Driveline System

[+] Author Affiliations
Vladimir V. Vantsevich, Jesse R. Paldan

University of Alabama at Birmingham, Birmingham, AL

Paper No. DETC2014-34245, pp. V003T01A003; 7 pages
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 3: 16th International Conference on Advanced Vehicle Technologies; 11th International Conference on Design Education; 7th Frontiers in Biomedical Devices
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4634-6
  • Copyright © 2014 by ASME


In this paper, an investigation is performed into the optimization of wheel power distribution between the drive axles of an AWD hybrid-electric SUV. The paper presents a criterion to maximize the vehicle’s slip efficiency through control of the kinematic discrepancy factor. The optimization criterion is combined with a mathematical model of a driveline for an AWD hybrid-electric vehicle using a new hybrid-electric power transmitting unit to control power distribution between the front and rear drive wheels. A technical concept is described for the hybrid-electric power transmitting unit that is functionally fused with a series hybrid-electric transmission. The mode of operation of the power transmitting device is described and simulations are performed for a 4×4 hybrid-electric vehicle of different driveline characteristics to compare the influence of driveline type on vehicle energy efficiency, including battery depletion, and vehicle mobility when traveling on a road or off-road under severe terrain conditions.

Copyright © 2014 by ASME



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