PT  - JOURNAL ARTICLE
AU  - Sedlák, Pavel
AU  - Bauer, František
TI  - Evaluation of traction properties of tractors in a roller testing station
DP  - 2015 Apr 21
TA  - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
PG  - 91--100
VI  - 52
IP  - 5
AID - 10.11118/actaun200452050091
IS  - 12118516
AB  - The aim of this study was to analyse pulling and slipping parameters of tractors on the base of performed pulling tests and to develop general mathematic formulas suitable for the evaluation of pulling properties of tractors of different types in a roller testing station. For these measurements a JOHN DEERE 7820 tractor was used. Pulling characteristics of this tractor were measured in the roller testing station, which was equipped with a dynamometer VDU E270T-E150T. This paper presents results of such tests and enables to estimate with a good degree of accuracy and statistical significance final parameters of pulling properties of tractors. Final pulling parameters of tractors of different types can be estimated for arbitrary values of slippage. The derived relationships presented in this paper enable to evaluate pulling properties of tractors in a roller testing station with the same reliability as those defined for standard curves of slippage. The technical equipment of this roller testing station with four dynamometers enables to measure independently driving forces, slippage and speed of each wheel. In this testing station it is possible to evaluate pulling properties of tractors under changing load and to estimate pulling and slipping parameters of a concrete type of tractor.