International Scientific Journal

Thermal Science - Online First

online first only

Contribution to the development of methodology for assessing the impact of bus suspension system on fuel consumption and CO2 emission

This paper analyzes the effects of intercity bus suspension system oscillatory parameters on driver's ride comfort and road damage. The analysis has been carried out through simulation by means of validated in-plane bus model with six degrees of freedom excited by real road roughness signal. Low root-mean-square values of the weighted vertical acceleration (less than 0.315 m/s2) have been achieved by shock-absorbers with lower damping coefficient and softer suspension system springs. Low values of dynamic load coefficient provide low shock-absorber damping and softer springs. However, low crest factor values for both axles are accomplished for high shock-absorber damping and softer springs in bus suspension system. Results from this analysis could be used as reference for selecting proper oscillatory parameter values when designing road-friendly bus suspension system which in turn would increase vehicle energy efficiency. Presented methods, results and analyzes are the part of wider methodology for assessing the impact of bus suspension system on fuel consumption and CO2 emission.
PAPER REVISED: 2019-04-07
PAPER ACCEPTED: 2019-04-10
  1. Stokić, M., Vujanović, D., Vehicle Procurement Criteria Evaulation, Proceedings, 4th Interantional Conference on Traffic and Transport Engineering, Belgrade, Serbia, 2018, pp. 407-415
  2. Riener, A., et a., 2010, Subliminal vibro-tactile based notification of CO2 economy while driving, Proceedings, 2nd International Conference on Automotive User Interfaces and Interactive Vehicular Applications, Pittsburgh, Pennsylvania, USA, 2010, pp. 92-101
  3. Descornet, G., Road-Surface Influence on Tire Rolling Resistance, (Meyer, W., Reichert, J., in Surface Characteristics of Roadways: International Research and Technologies), West Conshohocken, PA, USA , pp. 401-415. 1990
  4. Van Dam, T. J., et al., Towards Sustainable Pavement Systems: a Reference Document (No. FHWA-HIF-15-002), Federal Highway Administration, Washington, D.C., USA, 2015
  5. Zaabar, I., Chatti, K., Calibration Of HDM-4 Models for Estimating the Effect of Pavement Roughness on Fuel Consumption for US Conditions, Transportation Research Record, 2155 (2010), 1, pp. 105-116
  6. Ivkovic, I., et al., Influence of Road and Traffic Conditions on Fuel Consumption and Fuel Cost for Different Bus Technologies, Thermal Science, 21 (2017), 1B, pp. 693-706.
  7. Potter, T. E. C., et al., Road-Damaging Potential of Measured Dynamic Tyre Forces in Mixed Traffic, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 210 (1996), 3, pp. 215-225
  8. Cebon, D., Interaction Between Heavy Vehicles and Roads, Report No. SP-951, Cambridge University, Cambridge, UK, 1993
  9. Kenis, W. J., et al., Spatial Repeatability of Dynamic Wheel Loads for Heavy Vehicles: a Literature Review, International Journal of Heavy Vehicle Systems, 5 (1998), 2, pp. 116-148
  10. Agostinacchio, M., et al., The Vibrations Induced by Surface Irregularities in Road Pavements-A Matlab® Approach, European Transport Research Review, 6 (2014), 3, pp. 267-275
  11. Xia, R., et al., Effect Analysis of Vehicle System Parameters on Dynamic Response of Pavement, Mathematical Problems in Engineering, 2015 (2015), pp. 1-8, DOI No. 10.1155/2015/561478
  12. ***, ISO 2631, Mechanical Vibration and Shock-Evaluation of Human Exposure to Whole-Body Vibration, 1997,
  13. Gillespie, T., et al., Effects of Heavy Vehicle Characteristics on Pavement Response and Performance, Final Report No. UMTRI 92-2, University of Michigan, Ann Arbor, USA, 1992
  14. Nijemčević, S., et al., Tehnička knjiga (Technical Book), Ikarbus AD, Belgrade, Serbia, 2001
  15. Mladenović, D., Bus Dynamic Behaviour in Real Driving Conditions, Ph. D. thesis, University of Belgrade, Belgrade, Serbia, 2008
  16. Sekulić, D., Investigation of Passengers' Oscillatory Comfort in the Bus with Respect to the Seat Position and Quality, Ph. D. thesis, University of Belgrade, Belgrade, Serbia, 2013
  17. Ettefagh, M. M., et al., Reliability Analysis of the Bridge Dynamic Response in a Stochastic Vehicle-Bridge Interaction, KSCE Journal of Civil Engineering, 19 (2015), 1, pp. 220-232
  18. Kim, R. E., et al., Stochastic Analysis of Energy Dissipation of a Half-Car Model on Nondeformable Rough Pavement, Journal of Transportation Engineering, Part B: Pavements, 143 (2017), 4, pp. 1-10, DOI No. 10.1061/JPEODX.0000014
  19. Demić, M., Diligenski, Dj., Numerical Simulation Of Shock Absorbers Heat Load For Semi-Active Vehicle Suspension System, Thermal Science, 20 (2016), 5, pp. 1725-1739
  20. ***, University of Michigan, RoadRuf User Reference Manual, 2016,
  21. Simić, D., Dinamika motornih vozila: oscilacije i vešanje automobila (Motor Vehicle Dynamics-Oscillation and Vehicle Suspension), University of Kragujevac, Kragujevac, Serbia, 1975
  22. ***, The Transtec Group, ProVAL User's Guide-Version 3.6, 2016,
  23. Cole, D. J., Cebon, D., Truck Suspension Design to Minimise Road Damage, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 210 (1996), 2, pp. 95-107, DOI No. 10.1243/PIME_PROC_1996_210_251_02
  24. Gillespie, T., Fundamentals of Vehicle Dynamics, SAE, Warrendale PA, USA, 1992