Results 221 to 230 of about 10,667 (257)
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Method of estimating the rolling resistance coefficient of vehicle tyre using the roller dynamometer
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2020The tendency in the past few years has been to introduce tyres with lower rolling resistance coefficients to the market. This paper presents a mathematical method for determining the rolling resistance coefficients variation depending on the speed. The method uses power balance which results from automobile dynamics while rolling on chassis dynamometer.
Adrian Soica +4 more
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Comparative Estimation of Electric Vehicle Rolling Resistance Coefficient in Winter Conditions
2016 IEEE Vehicle Power and Propulsion Conference (VPPC), 2016The electric/hybrid vehicle are promising technologies and practical for the transport and the environment. For energy management, the vehicle longitudinal dynamics used to estimate vehicle power demands depend on several parameters, including its mass and its rolling conditions.
O. Trigui +3 more
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Comparative Study of Vehicle Aerodynamic and Rolling Resistance Coefficients Estimation Methods
2019 IEEE Vehicle Power and Propulsion Conference (VPPC), 2019The new stringent standards laid down for reducing pollution and greenhouse gas emissions in transportation sector compel the vehicle manufacturers to use different technologies to decarbonize the vehicles and reduce their energy consumption. Powertrain control optimization, especially based on instantaneous accurate information, has an important role ...
F. Andriaminahy +5 more
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A Method to Determine the Rolling Resistance Coefficient by Means of Uniaxial Testing Machines
Experimental Techniques, 2013The characterization of the rolling resistance is an important issue when designing mechanical systems in order to predict the force needed to run a given mechanism. Frictional forces in bearings and rolling resistance in rollers and wheels are the most important factors contributing to the overall resistance to the movement. As the rolling coefficient
J. Bonhomme, V. Mollón
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Coefficient of Friction and Rolling Resistance of Selected Fruits
2003Thai Agricultural Research Journal, 21, 1, 3 ...
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Identification of Rolling Resistance Coefficients for Aircraft Tires on Unsurfaced Airfields
Journal of Aircraft, 2007The paper describes four test methods for determining the rolling resistance of aircraft tires on unsurfaced airfields. Evaluations of a flight-test method, an instrumented-vehicle method, a soil stress-deformation method, and a tow-test method were performed on a grassy airfield.
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Revisiting the coefficient of rolling resistance: a phenomenological approach
European Journal of PhysicsAbstract Rolling resistance is a subtle topic that remains underrepresented in physics education. While sliding (kinetic) resistance is routinely covered, rolling resistance introduces conceptual challenges such as multiple competing definitions, unclear mechanisms of energy dissipation, and ambiguous roles of static friction.
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Вестник Бурятской государственной сельскохозяйственной академии имени В. Р. Филиппова, 2023
В условиях интенсификации сельскохозяйственного производства мобильные энергетические средства за счет многократного воздействия на почву приводят к переуплотнению почвы и снижению ее плодородия. При осуществлении основных технологических операций почва выступает в роли несущего основания для колес тракторов, оказывающих на нее высокое механическое ...
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В условиях интенсификации сельскохозяйственного производства мобильные энергетические средства за счет многократного воздействия на почву приводят к переуплотнению почвы и снижению ее плодородия. При осуществлении основных технологических операций почва выступает в роли несущего основания для колес тракторов, оказывающих на нее высокое механическое ...
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Ergonomics, 1999
The coefficient of rolling resistance (C r) for pneumatic tyres is dependent on hysteresis loss from tyre deformation which is affected by the vertical force applied to the tyres (F v) and the tyre inflation pressure (P r). The purpose of this paper was to determine the relative influence of five different levels of P r and four different levels of F v
F. Grappe +5 more
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The coefficient of rolling resistance (C r) for pneumatic tyres is dependent on hysteresis loss from tyre deformation which is affected by the vertical force applied to the tyres (F v) and the tyre inflation pressure (P r). The purpose of this paper was to determine the relative influence of five different levels of P r and four different levels of F v
F. Grappe +5 more
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SAE International Journal of Passenger Cars - Mechanical Systems, 2014
<div class="section abstract"><div class="htmlview paragraph">This study investigates the practicality of vehicle coast down testing as a suitable replacement to moving floor wind tunnel experimentation. The recent implementation of full-scale moving floor wind tunnels is forcing a re-estimation of previous coefficient of drag ...
Austin Hausmann, Christopher Depcik
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<div class="section abstract"><div class="htmlview paragraph">This study investigates the practicality of vehicle coast down testing as a suitable replacement to moving floor wind tunnel experimentation. The recent implementation of full-scale moving floor wind tunnels is forcing a re-estimation of previous coefficient of drag ...
Austin Hausmann, Christopher Depcik
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