Email this article TRACTOR DECELERATION DEPENDENCY BY THE KINEMATIC DISCREPENCY
Abstract
Tractor 4×4 moving with enabled front axle drive, in many cases there are kinematic discrepancies between the front and rear wheels theoretical speeds. Once the tractor is unloaded from pull or push forces, kinematic discrepancies makes one wheel to slip, while the other skid. Therefore, during the braking process, the kinematic discrepancy changes the wheel's adhesion to the road.
In this research, we have proven that, kinematic discrepancy reduces the braking efficiency. By comparing the braking performance of the tractor while braking, we can clearly say it the tractor braking performance varies when the different kinematic factor. However, with a small tractor speed, the total braking time and averages of deceleration are almost equal, regardless of the kinematic discrepancy.
The article presents and analyses tractor with 4x2 and 4x4 driving wheels braking deceleration parameters, when the tractor is braking with engine with different kinematic discrepancy.Keyword(s): Deceleration, braking, tractor, tires
References
Vantsevich V. Vehicle system dynamics: coupled and interactive dynamics analysis. Vehicle System Dynamics. 2014; 51(11), 1489–1516 p.p.
Molari G., Bellentani L., Guarnieri A., Walker M., Sedoni E. Performance of an agricultural tractor fitted with rubber tracks. Biosystems engineering, vol 111, 2012, 57-63 p.p.
Zoz, F. M., R. L. Turner. Effect of correct pressure on tractive efficiency of radial-ply tires. ASAE Paper No. 941051. 1994.St. Joseph, Mich.: ASAE.
Schreiber, M. & Kutzbach, H., Influence of soil and tire parameters on traction. Research in Agricultural Engineering 54 (2), 2008, 43–49 p.p.
M. Nastasoiu, V. Padureanu, V. R. Nastase. Using the Lagrange equations in the braking dynamics of wheeled tractors. In: Bulletin of the Translivania University, Vol. 13 (48), Series A, 2006, ISSN 1223-9631
Nastasoiu M., Ispas N., Nastasoiu S., Study on the interaction in the tractor-attachment system during braking considering the attachment mass and the correlation of brakes control. The 8th International Conference Fuel Economy, Safety and Reliability of Motor Vehicles, ESFA 2009, Politehnica University Bucharest, ISSN – 2067-1083, 12- 14 Nov. 2009.
Senetore C., Sandu C. Torque distribution influence on tractive efficiency and mobility of offroad wheeled vehicles. Journal of Terramechanics, 48, 2011, 372-383 p.p.
Panáček, V., Semela, M., Adamec, V., Schüllerová, B., 2016. Impact of usable coefficient of adhesion between tyre and road surface by modern vehicle on its dynamics while driving and braking in the curve. Transport. 31(2), 142–146 p.p.
Janulevičius A., Pupinis G., Lukštas J., Damanauskas V., Kurkauskas V. (2017): Dependencies of the lead of front driving wheels on different tire deformations for a MFWD tractor. Transport. 32(1), 23–31 p.p.
Žuraulis V., Levulyte L, Sokolovskij E. (2014) The impact of road roughness on the duration of contact between a vehicle wheel and road surface. Transport 29(4), 431–439 p.p.
Kamiński Z. Czaban J. Diagnosing of the agricultural tractor braking system within approval tests., Maintenance and Reliability 2012; 14 (4), 319–326 p.p.
LAMANDE, M. and SCHJONNING, P. 2011. Transmission of vertical stress in a real soil profile. Part II: Effect of tyre size, inflation pressure and wheel load. Soil and Tillage Research, 114(2),71 – 77 p.p.
Refbacks
- There are currently no refbacks.
Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371
This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.