A Statistical Analysis of the Variability of the Braking Efficiency of New, Original Equipment Brake Sets Installed in the Same Vehicle

911705

09/01/1991

Event
Automotive Industry in Expanding Countries
Authors Abstract
Content
This paper evaluates statistically the variability of braking efficiency obtained with new, original equipment(OE) brake sets, installed successively in the same vehicle. The analysis separates the components of braking efficiency variability caused by: 1) production variability among brake sets (due to differences in materials, machining, and assembling); and 2) measuring errors (pertaining to the braking measurement methods and measuring personnel).
The data were obtained using three different methods: torque wheels, a low speed roller dynamometer, and “Road Transducer Plates” (RTP). The data were taken after burnishing each new brake set according to the Federal Motor Vehicle Safety Standard No. 105.
The most accurate results were provided by the torque wheel measurements conducted simultaneously on the four wheels. With this type of measurement, the variability of braking efficiency was due more to brake set differences than to measuring errors. The converse occurred for the low speed roller dynamometer and the RTP methods.
Meta TagsDetails
DOI
https://doi.org/10.4271/911705
Pages
13
Citation
Bascunana, J., "A Statistical Analysis of the Variability of the Braking Efficiency of New, Original Equipment Brake Sets Installed in the Same Vehicle," SAE Technical Paper 911705, 1991, https://doi.org/10.4271/911705.
Additional Details
Publisher
Published
Sep 1, 1991
Product Code
911705
Content Type
Technical Paper
Language
English