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Normalized Evaluation of Fuel Economy for Electric Oriented Commercial Vehicles

[+] Author Affiliations
Xubin Song, Jason Liu

Eaton Corporation, Southfield, MI

Paper No. DETC2012-70110, pp. 425-430; 6 pages
  • ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 6: 1st Biennial International Conference on Dynamics for Design; 14th International Conference on Advanced Vehicle Technologies
  • Chicago, Illinois, USA, August 12–15, 2012
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4505-9
  • Copyright © 2012 by ASME


The fuel economy regulation has been applied to cars and light trucks with a gross vehicle weight rating (GVWR) of 8,500 pounds or less for decades. For the first time, the government is also beginning to work on national mileage standards beyond the existing emission regulation for big rigs and work trucks (i.e., commercial vehicles). This effort will lead to limiting the disproportionate share of pollutions from these large vehicles. The same technology trend for both currently regulated vehicles and those unregulated big trucks is electrification for better energy efficiency. Vehicle electrification will be widely employed to improve energy utilization efficiency, and reduce or even eliminate GHG emissions. Overall the fundamental objective is to reduce the total amount of energy used by vehicles while minimizing the negative environmental impacts overall. Thus, it is critically important to find out an effective and implementable matrix that can be acceptable and recognizable for both industry and public. In this paper, the weight ratio between payload and unloaded vehicle weight is introduced to normalize the conventional mpg to evaluate vehicle performance per duty cycles. This methodology is especially suited to new energy vehicles by using both endogenous fuel and exogenous electricity (if applicable).

Copyright © 2012 by ASME



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