Abstract
Abstract: Wear processes of auto vehicle lead at decrease of functionally parameters (motor power, traction force), at growth specific fuel of consumption, and decrease (reduction) useful load who's able to transport. This process is cause of decrease hour productivity of auto vehicle who depend, through another factors, by useful transported mass. Establishing certain coefficient of rentability of transport activity, we shall able to deduce a limit of outgoings of transport for each type of auto vehicle. Once touch this level, transport with that auto vehicle become unprofitable and, so economical unjustifiable. This paper proposes to determinate limits admissible of parameters through analytical and graphical method: traction power, engine moment and effective power in ratio with useful mass.
Keywords: rentability, power, traction, trucks, dynamic, exploitation, enterprise.