Abstract
ABSTRACT:
The paper presents results obtained in an extended study regarding the dynamic behaviour of a tractor-semitrailer road-train. Experimental research and computer analysis were performed to obtain the loads stressing the tractor drivetrain.
The research program included both short time records (standing start, gear shifting, engine braking), to obtain the load peaks, and long time records, to obtain the statistical load distributions in typical road and traffic conditions (plain, hill and mountain roads).
Using the torque upper values, some transmission parts were analysed by finite element method to find the corresponding stresses and deformations. Also, fatigue calculations were performed using statistical load estimations for the global vehicle life.
Processing the acquired data (torques and rotational speeds) was possible to find the heat quantity resulted in the clutch and in the synchromesh during gear engagement.
The knowledge resulted from this research can be use to improve the drivetrain design and to find the best way to drive this heavy vehicle type.