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Thursday, July 16, 2020 | History

2 edition of optimisation of tyre-road friction. found in the catalog.

optimisation of tyre-road friction.

Robert Bond

optimisation of tyre-road friction.

by Robert Bond

  • 306 Want to read
  • 10 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.)- Univ.of Birmingham, Dept of Transportation and Environmental Planning.

ID Numbers
Open LibraryOL20014077M

$\begingroup$ It's worth pointing out that tire designers have to trade off reducing rolling friction against increasing static friction. This is maybe easiest to see with the various kinds of bicycle tires. A skinny, slick, high-pressure road tire has very low rolling friction but will skid easily; a fat, knobby, low-pressure off-road tire doesn't skid easily but the cyclist has to do more.   The straight-line tyre/road friction coefficients of three motorcycle tyres designed for high-performance or sports motorcycles have been measured and compared with a representative ordinary car tyre. Both peak and locked-wheel friction was measured on two different surfaces (hot rolled asphalt and stone mastic asphalt), dry and wet, at speeds.

And the question doesn't mention rolling resistance, only "friction between the tyre and road". Since you want to get pedantic about it, your answer doesn't relate to that question because it only talks about rolling resistance, not friction. To reduce friction you'd want a hard, smooth, large tyre. Like one of the plastic drift trike wheels.   Coefficient of friction, μ=V2/(2Sg)[math]μ=V2/(2Sg)[/math] The equation is based on two basic formula Frictional force =μmgSo,μmg=ma−>μ=a/g[math]=μmgSo,μmg.

  Re: Tyre load, area of contact, and pressure Post Sat am As I can recall, it was rather plausibly concluded in another thread recently, that traction generated between a soft and adheisive tyre and a rough surface is a little too complicated to be explained by a . Statistical Tyre/Road Noise Modeling in Hong Kong on Polymer Modified Friction Course K.L. Mak and W.K. Loh Hong Kong Community College, Hong Kong, China Abstract: Based on the Close Proximity (CPX) method specified in ISO/DIS , we recorded andAuthor: K. L. Mak, W. K. Loh.


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Optimisation of tyre-road friction by Robert Bond Download PDF EPUB FB2

Of an approaching area with low friction. The tyre-road friction coefficient is difficult to es-timate during normal driving, mainly due to the lim-ited information about the maximum achievable tyre forces in the linear tyre region, see (Lex, ) and (Ray, ). Previous research have attempted to cor-Author: Anton Albinsson, Fredrik Bruzelius, Bengt J H Jacobson.

Knowledge of the current tyre–road friction coefficient is essential for future autonomous vehicles. The environmental conditions, and the tyre–road friction in particular, determine both the braking distance and the maximum cornering velocity and thus set the boundaries for the vehicle.

Tyre–road friction is difficult to estimate during normal driving due to low levels of tyre force Cited by: 8. Lateral tire deflection enables the estimation of the tire-road friction coefficient.

Vehicle steering, such as driving on a curved highway, can influence the friction coefficient estimation. Li, H. Du & W. Li, "Comparative study of vehicle tyre-road friction coefficient estimation with a novel cost-effective method," Vehicle System Dynamics: international journal of vehicle mechanics and mobility, vol.

52, (8) pp.Slip-based tire-road friction estimation (3) maximum friction coefficient fJLmax, but during normal driving only small values ^ Cited by: Tyre/road friction modeling Literature survey R.

van der Steen DCT Coaches: I. Lopez B. de Bruijn A.J.C. Schmeitz Supervisor: H. Nijmeijer Eindhoven University of Technology Department of Mechanical Engineering Dynamics and Control group Eindhoven, May, The work objective is to increase performance of Nissan sx S13 prepared for a quasi-static state of drifting on a circular path with given constant radius (R=15 m) and tyre-road friction.

3 Version September 1. Introduction Frictional properties of pavements play a significant role in road safety as the friction between tire and pavement is a File Size: KB. Breuer, B., Eichhorn, U.

and Roth, J., “Measurement of tyre/road friction ahead of the car and inside the tyre,” Proceedings of AVEC‘92 (International Symposium on Advanced Vehicle Control), pp. –, Google ScholarCited by: 1.

Rubber friction plays an important role in many practical situations. One practical application is for instance the rubber friction between a tire and the road. It is important to know how the kinematic friction coe cient depends on the slip velocity of the tire, in order to make good models.

The friction of. Measurement of tyre/road-friction ahead of the car and inside the tyre. Authors: Breuer, B; Eichhorn, U; Roth, J; Conference: International Symposium on Advanced Vehicle Control,Yokohama, Japan.

For the development of the algorithm a flexible ring model is used to describe the tyre. The friction model is based on Coulomb’s friction. We present (quasi-)static results obtained from the algorithm for various friction coefficients, as well as frictionless results for a rotating tyre.

A sequential tire cornering stiffness coefficient and tire–road friction coefficient (TRFC) estimation method is proposed for some advanced vehicle architectures, such as the four-wheel independently-actuated (FWIA) electric vehicles, where longitudinal tire force difference between the left and right sides of the vehicle can be easily by: Road slipperiness is a condition of low skid resistance due to insufficient road friction.

It is a result of snow, ice, water, loose material and the texture of the road surface on the traction produced by the wheels of a vehicle. Road slipperiness can be measured either in terms of the friction between a freely-spinning wheel and the ground, or the braking distance of a braking vehicle, and.

tyre–road friction by data fusion and statistical inference meth-ods. We trained a prediction model, based on linear regression, with weather data, traffic data and official road database infor-mation as covariates, and friction measurements of four separate test runs as ground truth.

We assessed the validity of the model. Friction measurement methods and the correlation between road friction and traffic safety. A literature review. by Carl-Gustaf Wallman & Henrik Åström Swedish National Road and Transport Research Institute (VTI) SE 95 Linköping, Sweden Summary Doubtless, there is a strong correlation between road friction and accident Size: KB.

Where g is the gravitational acceleration, v is the initial velocity when the brakes are applied and f r is the rolling resistance coefficient and was assume to be equal to A common value for K, for production car, is s 2 /m 2; e is the Euler number and is equal to A THEORY OF WET ROAD-TYRE FRICTION.

A detailed mathematical theory of wet road-tyre frictional processes is constructed. The theory incorporates to some extent the fundamental frictional properties of the rubber, the effects of road microtexture and macrotexture, the water depth, the horizontal stiffness of the tyre, the wheel load and the inflation pressure.

Friction is created when two surfaces rub together; for example, when a car tyre moves over the road surface. Friction can create heat and smoke can often be seen coming from the tyres of racing cars.

The friction between the road surface and the tyre causes the tread in the tyre to wear down. Technically some insane experiments can be done if you are a skilled/crazy driver. However the theory and practice hardly agree with each other to come up with a precise value. This is because in reality, at the roads for a moving vehicle, the coe.

A study of the tyre/road interface under wet conditions. By J. H. Mosley. Download PDF (17 MB) Abstract. This work addresses the problem of tyre tread pattern design for optimum wet grip performance.

Dunlop Car Tyre Data Book, Tyre Technical Division, The Optimisation of Tyre-Road Friction",Author: J. H. Mosley.importance of tyre-road traction (or friction). Intuitively most users of vehicles would endorse high friction on the simple ground that it would increase safety.

However, there has not yet been a complete study of driver-vehicleeenvironment system effectiveness to determine how high friction should be.Physics How Things Work The Friction of Automobile Tires from Jones & Childers, Contemporary College Physics, 3rd ed., How do tires affect your safety when you drive your car along the highway?

What factors help to prevent skidding and allow you to control your car when turning and stopping? What does friction have to do with this?