Effect of Engine Operating Altitude Towards Traction Force on Wheels

Enoch Abraham, Saiful Hasmady Bin Abu Hassan, Rifqi Irzuan Bin Abdul Jalal, John Birkmyre

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Many modern day compact cars running on downsized engines with direct drive transmissions are having trouble meeting the practical demands of vehicle usage especially under the varying ambient conditions. The vehicle cannot launch from stationary on inclined roads at high altitudes due to inadequate traction force on wheels. This is due to reduced air density which directly reduces the apparent volumetric efficiency of a normally aspirated spark ignition engine hence reducing the torque output of the engine. The significant reduction in torque output compared to that obtained on the engine dynamometer based on ideal volumetric efficiency simply means the first gear ratio selected initially is no longer adequate to provide the necessary traction force on wheels. This paper details the necessary compensation required for first gear ratio selection to prevent this problem from occurring. It is found that traction force on wheels can drop by as much as 38.2% at high altitudes (1500 m) above sea level.

Original languageEnglish
Title of host publication2018 3rd IEEE International Conference on Intelligent Transportation Engineering, ICITE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages149-153
Number of pages5
ISBN (Electronic)9781538678312
DOIs
Publication statusPublished - 15 Oct 2018
Event3rd IEEE International Conference on Intelligent Transportation Engineering, ICITE 2018 - Singapore, Singapore
Duration: 03 Sep 201805 Sep 2018

Publication series

Name2018 3rd IEEE International Conference on Intelligent Transportation Engineering, ICITE 2018

Conference

Conference3rd IEEE International Conference on Intelligent Transportation Engineering, ICITE 2018
CountrySingapore
CitySingapore
Period03/09/1805/09/18

All Science Journal Classification (ASJC) codes

  • Decision Sciences (miscellaneous)
  • Automotive Engineering
  • Civil and Structural Engineering
  • Control and Optimization
  • Transportation
  • Urban Studies

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  • Cite this

    Abraham, E., Bin Abu Hassan, S. H., Bin Abdul Jalal, R. I., & Birkmyre, J. (2018). Effect of Engine Operating Altitude Towards Traction Force on Wheels. In 2018 3rd IEEE International Conference on Intelligent Transportation Engineering, ICITE 2018 (pp. 149-153). [8492682] (2018 3rd IEEE International Conference on Intelligent Transportation Engineering, ICITE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICITE.2018.8492682