Aerodynamic Improvements - A Great Potential for Better Fuel Economy

780265

02/01/1978

Event
1978 Automotive Engineering Congress and Exposition
Authors Abstract
Content
Aerodynamic drag is one of the principal factors influencing fuel economy of passenger cars. Techniques are discussed which enable the effect of aerodynamic improvements to be evaluated utilizing computer simulation. Methods are also presented which enable such improvements to be realized.
An acceptable drag coefficient of cD = 0.42 can be readily achieved within conventional styling concepts by refining and optimizing body details. “Detail Optimization” can enable gasoline (Diesel) powered vehicles to achieve maximum fuel economy improvements ranging between 4 % (5 %) and 7 % (9 %) above 1977 averages for subcompacts and full sized passenger cars respectively.
Contemporary styling concepts placing great emphasis upon aerodynamics enable minimum drag coefficients of cD = 0.32 to be achieved. Application of such concepts and techniques can enable fuel economy improvements of 14 % (20 %) for full sized passenger cars and 11 % (14 %) for subcompacts to be realized.
Meta TagsDetails
DOI
https://doi.org/10.4271/780265
Pages
9
Citation
Janssen, L., and Emmelmann, H., "Aerodynamic Improvements - A Great Potential for Better Fuel Economy," SAE Technical Paper 780265, 1978, https://doi.org/10.4271/780265.
Additional Details
Publisher
Published
Feb 1, 1978
Product Code
780265
Content Type
Technical Paper
Language
English