Wheel Diameter and Width Influence in Variability of Brake Data Measurement at Ministry of Transport Facilities

The brake systems of vehicles are tested periodically by a “brake tester” at Ministry of Transport (MOT) stations. This tester measures the effectiveness of vehicle. This parameter is established by the International Committee of Vehicle Inspection (CITA). In this paper, we present an investigation of the influence of the tire size on the measurements of brake force on three MOT brake testers. We performed an analysis of the vehicle braking capacity test at MOT stations. The influence of varying wheel diameter and width on the measurement of braking at MOT stations has been analyzed. Thereby, the MOT brake tester as a verification system for a vehicle has been evaluated.

• Carolina Senabre
• Sergio Valero
• Emilio Velasco

• Brake tester
• wheel diameter
• Ministry of transport facilities.

[1] CITA (2014) Standardization of criteria for evaluation of defects diagnosed during the inspection of vehicles.
[2] European Community (2002) Directive 2002/78/EC Official Journal of the European Communities, L 267/23, October 4,
[3] Ministry of Industry, Tourism and Trade of Spain (2014) MOT Inspection Procedures Manual station.
[4] Ministry of Industry, Tourism and Trade of Spain (2014) National Regulation Vehicle Inspection in Law No. 29237,
[5] Luque P, Álbarez D, Vera C (2004). Automobile Engineering, Systems and Dynamic Performance. Publisher: Thomson.
[6] F. Aparicio and C. Vera (2001). Theory of vehicles, vol.2.
[7] Dixon J. C. (1996) Tires, Suspension and Handling, Society of Automotive Engineers, Inc. The Open University, Great Britain.
[8] C. Senabre, E. Velasco, S. Valero Analysis of the influence of tire pressure and weight on the measure of braking-slide on a brake tester and on flat ground. Securitas Vialis Volume 2, Number 3, 109-116, DOI: 10.1007/s12615-011-9029-5
[9] C. Senabre et al (2015) Differences in brake data results on Ministry of Transport roller bank testers such as: Maha, Ryme with different distance between rollers and roughness. Journal of mechanics engineering and automation. Vol 5, nº 10 pp:5567-572.
[10] C. Senabre, E. Velasco, S. Valero (2012). Comparative analysis of brake data of vehicles on two different ministry of transport brake roller testers. Journal of testing and evaluation 40, No. 4.
[11] C. Senabre, E. Velasco, S. Valero (2012). Comparative analysis of vehicle brake data in the Ministry of Transport test on the roller brake tester and on flat ground. International journal of automotive technology, 13, No. 5, pp 735-742.