by British Iron and Steel Industry Translation Service in London .
Written in English
Originally published in Neue Hütte 1967 12 153-156.
|Statement||translated from the German.|
In the broad sense, specific "rolling resistance" (for vehicles) is the force per unit vehicle weight required to move the vehicle on level ground at a constant slow speed where aerodynamic drag (air resistance) is insignificant and also where there are no traction (motor) forces or brakes Size: KB. The rolling resistance of these tires are analyzed against other tire characteristics (tire construction, new versus retread, etc.) to gain insight as to the effects of these characteristics on Author: Brian Wiegand. resistance, driver support functions and vehicle control can be improved. The driving resistance can be divided into rolling resistance, air drag and change in potential energy due to road grade. Estimations of the road grade and the vehicle mass have been subject to many research. 7 All tires have a rolling resistance coefficient—a number that defines how much resistance a tire encounters as it deforms into the contact patch—both at a steady state when the vehicle speed is kept constant, and in a dynamic state.
noun. (Mechanical engineering: General) The rolling resistance of a wheel or ball is its resistance to movement caused by friction between it and the surface it is rolling on. The rolling resistance of the tires is a major opposing force on a moving vehicle. The extremely narrow front wheels of a drag-race car are used to reduce rolling resistance. The rolling resistance (RR) of a vehicle was defined as the force opposing horizontal motion on a deformable surface or on flexible tires or a rate of energy loss to the soil and/or tires. where R is rolling resistance in kN and bw is wheel width in m and the other parameters are introduced above. Validity of equation above in order to predict rolling resistance based on soil deformation was offered by Wong  for wheel diameters more than 50 cm and sinkage levels less than 15% of wheel by: Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body rolls on a surface. It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation of the wheel, roadbed, etc., is recovered when the pressure is removed. Two forms of this are hysteresis losses, and permanent deformation of the object or the surface. Another .
strength, resistance to abrasion, aging test, dynamic tests, adhesion tests) • Dynamical-Mechanical-Thermal Analysis of Vulcanizates Chapter “Laboratory Tyre Testing” discusses measuring and testing tyres in laboratory conditions. Laboratory tests are divided according to two criteria – into specific categories of vehicles (passenger. temporal developments of mean rolling resistance coefficients are missing. The situation on aerodynamic drag data is similar. Rare public studies focus on specific technical issues like benefits for electric vehicles (Wiedemann, Wiesebrock, & Heidorn, ) or on numerical simulation approaches (Schütz, ). Information on rolling resistance and. The technique of optimal design of experiments for determining the resistance to rolling of motor tires has been developed. It is based on the mathematical model involving the second-order regression equation. The regression analysis of the test results of mass tires for which the external factors (the pressure in the tire, the load, and the rolling velocity) varied shows the essentially Cited by: 2. purposes. Michelin Defender Michelin Premier A/S The Defender is their Standard Touring All-Season, high-mileage, low rolling resistance tire that comes mostly in a T-speed rating for family cars, minivans, crossover SUVs and station wagons. Most sizes come with an outstandmile treadlife.