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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/26331

Title: Measuring vehicle drag forces using an on-board microcomputer
Authors: Passmore, Martin A.
Jenkins, E.G.
Issue Date: 1990
Publisher: SAGE © IMechE
Citation: PASSMORE, M.A. and JENKINS, E.G., 1990. Measuring vehicle drag forces using an on-board microcomputer. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 204 (2), pp. 77-82.
Abstract: The force resisting the straight-line motion of a road vehicle on a flat track consists of mechanical resistance and aerodynamic drag. It is necessary to measure these component forces over the speed range of the vehicle to obtain data for performance calculations and for the accurate calibration of modern chassis dynamometers used in fuel economy and exhaust emission tests. Continuous measurement of wheel torque, vehicle speed, airspeed and direction enables estimates to be made of the various drag forces that bring the vehicle to rest during a coastdown test. The data are analysed using a sophisticated parameter optimization routine to determine the numerical values of the coefficients in a mathematical model of the total road load. Repeatability of the results are assessed by calculating the uncertainties in the values obtained from a number of track tests. A brief description of the on-vehicle data acquisition and processing system is given, and the advantages of an advanced test and analytical process are demonstrated.
Description: This paper is closed access.
Sponsor: The support of the Science and Engineering Research Council and the Ford Motor Company for this project is gratefully acknowledged.
Version: Published
DOI: 10.1243/PIME_PROC_1990_204_138_02
URI: https://dspace.lboro.ac.uk/2134/26331
Publisher Link: https://doi.org/10.1243/PIME_PROC_1990_204_138_02
ISSN: 0954-4070
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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