Last edited by Aralkis
Tuesday, August 11, 2020 | History

1 edition of The rolling resistance of pneumatic tires found in the catalog.

The rolling resistance of pneumatic tires

final report

by S. K. Clark

  • 373 Want to read
  • 30 Currently reading

Published by National Highway Traffic Safety Administration, Available through the National Technical Information Service in Washington, Springfield, Va .
Written in

    Subjects:
  • Fuel consumption,
  • Motor vehicles

  • Edition Notes

    StatementS. K. Clark, R. N. Dodge ; the Regents of the University of Michigan
    SeriesReport - Transportation Systems Center ; no. DOT-TSC-NHTSA-79-28
    ContributionsDodge, S. N., joint author, University of Michigan. Regents, United States. National Highway Traffic Safety Administration
    The Physical Object
    Paginationx, 60 p :
    Number of Pages60
    ID Numbers
    Open LibraryOL25842851M
    OCLC/WorldCa5953461

    This SAE Recommended Practice applies to the laboratory measurement of rolling resistance of pneumatic passenger car, light truck, and highway truck and bus procedure applies only to the steady-state operation of free-rolling tires at zero slip and inclination angles; it includes the follo. Welcome to the rolling resistance comparison tool. REFERENCE BASE TREAD: You choose the reference tread. The reference tread will always serve as a baseline value of SELECT A TREAD: Up to four treads can be selected to compare with the reference tread. Each tread will be indexed against the reference base tread that has been chosen.

    Recently, the development of non-pneumatic tires (NPT) such as the Michelin Tweel is receiving increased attention due to potential advantages over pneumatic tires such as low mass, no run flat, good contact pressure distribution, and low rolling resistance (RR). This study focuses on the design of a NPT based on properties of vertical stiffness, contact pressure, and rolling energy loss. Tires; As trucking evolves, the pneumatic tire will likely play the same role it always has like victory speeds in the history books where they belong. through an 11% lower rolling.

    Low rolling resistance tires are designed to reduce the energy loss as a tire rolls, decreasing the required rolling effort — and in the case of automotive applications, improving vehicle fuel efficiency as approximately 5–15% of the fuel consumed by a typical gas car may be used to overcome rolling resistance. For more than years, vehicles have been rolling along on cushions of air encased in rubber. The pneumatic tire has served drivers and passengers well on road and off, but a new design by Michelin could change all that - the Tweel Airless Tire. ­In this article, we'll look at what the Tweel Airless Tire is, why you would use it in place of traditional tires, some of the problems that may.


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The rolling resistance of pneumatic tires by S. K. Clark Download PDF EPUB FB2

Get this from a library. Temperature effects on rolling resistance of pneumatic tires. [Samuel K Clark; Ming Loo; University of Michigan.

Regents.; United States. Department of Transportation. Office of University Research.]. A handbook for the rolling resistance of pneumatic tires Unknown Binding – January 1, by Samuel Kelly Clark (Author) See all formats and editions Hide other formats and editions.

Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. Then you can start reading Kindle books on your Author: Samuel Kelly Clark.

A New Model for Rolling Resistance of Pneumatic Tires Rolling resistance of inflated tires is a factor that contributes to the total load and fuel consumption of a vehicle.

Therefore, models of rolling resistance is an important area within computer simulations of vehicles used to predict fuel consumption and by: S.

Clark () Rolling Resistance of Pneumatic Science and Technology: The rolling resistance of pneumatic tires bookVol. 6, No. 3, pp. Cited by: Rolling Resistance Forces in Pneumatic Tires Report, United States Dept.

of Transportation: Author: Samuel Kelly Clark: Contributor: United States. Department of Transportation. Office of University Research: Publisher: Department of Transportation, Office of the Secretary, Office of University Research, Length: 27 pages: Export Citation. Pneumatic tires.

Rolling resistance greatly increases with applied torque. At high torques, which apply a tangential force to the road of about half the weight of the vehicle, the rolling resistance may triple (a % increase).

This is in part due to a slip of about 5%. The rolling resistance increase with applied torque is not linear, but. The resistance of automotive tires to rolling eats up anywhere from 20% to 50% of the energy used by the car.

So if auto and tire engineers could cut the rolling resistance in passenger-car tires. C r = coefficient of rolling resistance m = mass of vehicle p = tire pressure (bars) v = velocity (km/h) g = gravity ( m/s 2) F r = Newtons.

Rolling Resistance Basic Equation: F r = C r mg. For pneumatic tires on dry road. Rolling Resistance Calculator. The concept of rolling resistance force is replaced by that of energy dissipated in unit distance traveled. The energy loss per unit distance, which is a function of slip angle, inclination angle, wheel torque, and other variables, is shown to reach a minimum under driving conditions.

inflation pressure of the tire on tire rolling resistance. (handbook, chap sectionpage ). Answer shall be given preferably with use of chart illustrating each relationship (check handbook, page ).

Explain the phenomena of the pneumatic tire rolling resistance. A Handbook for the Rolling Resistance of Pneumatic Tires by Richard N. Dodge, Samuel Kelly Clark Unknown, 86 Pages, Published ISBN / ISBN / Tire rolling resistance is one of the primary forces opposing motion on passenger vehicles.

New regulations appearing around the world will provide information on tire rolling resistance to consumers. Rolling resistance. Rolling resistance comes from friction between the wheel tread and the head of the rail partly, which also comes from s certain minute amount of flattening of the surfaces in contact.

The value of rolling resistance is a function of the coefficient of rolling friction between metals, which increases as the load is increased. Subject(s): Tires, Rubber -- Testing., Rolling contact., Automobiles -- Tires -- Testing.

Type(s): Technical Report Show full item record. PURPOSE: To reduce the rolling resistance without sacrificing other performance by optimizing the radial profile of the carcass in which the ratio of the radius of the curvature of the shoulder contour and the radius of the reference arc which is established by preset procedures.

CONSTITUTION: The following reference designations are made: B is the point of intersection of the line which is. Part 4A in this Series covers the history of Bicycle Rolling resistance and the how and why Pneumatic tires are so awesome.

If you just want to see the data, you can jump to Part B HERE. Back in during the Paris-Roubaix wheel development, I had an interesting moment in the Arenberg Forest. For example, a modern light weight automobile with small "footprint" pneumatic tires, has a rolling resistance of about 20 lbsf/ Ton on pavement.

Back inthey had the standard rolling resistance of an electric car down to 15 lbsf/ Ton on asphalt. With our modern materials, it could come down still lower.

Such studies have shown that airless tires generally have higher rolling resistance than pneumatic tires. However, these tests only measure rolling resistance on a smooth metallic surface.

In addition, correction factors need to be applied because rolling resistance is different on a curved drum surface, as opposed to actual earth terrain [9].

Any airless tire will be heavier than the rubber tire it is meant to replace; however, many rubber pneumatic tires are also heavy.

Rubber tires vary in rolling resistance and an airless tire or solid insert may only marginally increase rolling resistance, if at all. Installation of airless tires depends on the use.

Question: Based On The Pneumatic Tire Book, Starting On PageDiscuss Factors Governing Rolling Resistance Of Tires. Propose A Simple Means To Measure Rolling Resistance At A Given Speed.

(1/2 3. Page Max). Pneumatic tires also have a much lower rolling resistance than solid tires. Because the internal air pressure acts in all directions, a pneumatic tire is able to "absorb" bumps in the road as it rolls over them without experiencing a reaction force opposite to the direction of travel, as is the case with a solid (or foam-filled) tire.Parameter q sy 1 governs the initial level of the rolling resistance force and typically lies in between 1 and 2%.

Parameter q sy 3 controls the slight slope of the resistance with speed. The last parameter q sy 4 represents the sharp rise of the resistance that occurs after a relatively high critical speed is surpassed. Then, the so-called standing waves show up as a result of instability, cf.This test method covers the measurement of the electrical resistance between the wheel of a mounted and inflated tire-wheel assembly and a flat conducting surface in loaded contact with the tire.

This test method specifies procedures and equipment such that electrical resistance can be accurately determined for tires with values up to.