scholarly journals The determination of the rolling resistance coefficient of a passenger vehicle with the use of roller test bench method

2019 ◽  
Vol 254 ◽  
pp. 04007 ◽  
Author(s):  
Bartłomiej Pałasz ◽  
Konrad J. Waluś ◽  
Łukasz Warguła
Keyword(s):  
Energy Consumption ◽  
Experimental Research ◽  
Research Method ◽  
Test Bench ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Laboratory Method ◽  
Passenger Vehicle ◽  
Rolling Resistance Coefficient

Contemporary vehicle are designer to be eco-friendly. One of the factors limiting the energy consumption of driving processes is a low value of the rolling resistance coefficient. The rolling resistance depends on the construction features of a tire, exploitation conditions and the type of surface the car moves on. This article presents the results of experimental research of determining the rolling resistance coefficient with the use of laboratory method of roller test bench. The results presented here are a part of a wider research of determining the rolling resistance coefficient and the influence of research method on its value.

scholarly journals The determination of the rolling resistance coefficient of a passenger vehicle with the use of selected road tests methods

2019 ◽  
Vol 254 ◽  
pp. 04006 ◽  
Author(s):  
Bartłomiej Pałasz ◽  
Konrad J. Waluś ◽  
Łukasz Warguła
Keyword(s):  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Calculation Model ◽  
Passenger Vehicle ◽  
Calculation Methods ◽  
The Road ◽  
Wide Range ◽  
Rolling Method ◽  
Rolling Resistance Coefficient

Wide range of laboratory and road methods of determining the rolling resistance coefficient impose the need to find an effective way of its estimation. The obtained values of this coefficient differ depending from the assumed calculation model and influence the quality and quantity assessment of cooperation processes between tire and surface. The article presents two experimental methods of determining the rolling resistance coefficient. Road tests were carried out with the use of coast-down and free-rolling method. For each of the road methods the value of the rolling resistance coefficient was determined in three ways. It allowed to compare the selected research methods and calculation methods with the values available in literature.

scholarly journals Determination of rolling resistance coefficient based on normal tyre stiffness

2018 ◽  
Vol 327 ◽  
pp. 042093
Author(s):  
S P Rykov ◽  
V N Tarasuyk ◽  
V S Koval ◽  
N I Ovchinnikova ◽  
A I Fedotov ◽  
...  
Keyword(s):  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Rolling Resistance Coefficient

scholarly journals The determination of the rolling resistance coefficient of objects equipped with the wheels and suspension system – results of preliminary tests

2019 ◽  
Vol 254 ◽  
pp. 01005 ◽  
Author(s):  
Łukasz Wargula ◽  
Bartosz Wieczorek ◽  
Mateusz Kukla
Keyword(s):  
Moving Objects ◽  
Patent Application ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Suspension System ◽  
Operating Conditions ◽  
Drive Unit ◽  
Mobile Machinery ◽  
Rolling Resistance Coefficient

Rolling resistance coefficient is one of the basic resistance when moving objects. In case of objects not equipped with a motor-driven wheels and suspension system , such as: wheelchairs, mobile machinery chopper, shelving and warehouse trucks all resistances are overcome by the muscle strength of the operator. Research is carried out to limit this phenomenon, however, there is a lack of methods for measuring this parameter in the real operating conditions of devices with a wheels and suspension system without a drive unit. The article presents an innovative method of measuring the rolling resistance coefficient of objects equipped only with the wheels and suspension system accordant with the patent application P.424484 and the developed device for these tests in accordance with patent application P.424483. Additionally, the paper presents the results of preliminary tests on the measurement of pivoting coefficient of a transport truck loaded with a given mass.

Determination of the rolling resistance of roller skis

2016 ◽  
Vol 231 (1) ◽  
pp. 50-56
Author(s):  
Kurt Schindelwig ◽  
Martin Mössner ◽  
Michael Hasler ◽  
Werner Nachbauer
Keyword(s):  
Normal Load ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Equal Opportunities ◽  
Cross Country Skiing ◽  
Cross Country ◽  
Rolling Resistance Coefficient ◽  
Moving Patterns ◽  
Resistance Coefficients

The rolling resistance of skis used in roller skiing competitions should resemble the gliding resistance of cross-country skis to allow specific training and moving patterns for cross-country skiing and to guarantee equal opportunities for athletes in roller ski races. Therefore, the purpose of this work was to develop a portable rolling resistance meter to precisely measure the rolling resistance of roller skis. Measurements were based on recordings of the angular deceleration of a flywheel due to the rolling resistance between a roller ski’s wheel and the flywheel’s steel surface. Rolling resistance coefficients of four roller ski types ranged between 0.019 and 0.025. Measurements of the rolling resistance coefficient showed a precision of 1.26%. Substantial rolling resistance coefficient variations (10%) were observed for wheels of the same type. Furthermore, the rolling resistance coefficient was found to be negatively correlated with normal load or ambient temperature. The proposed rolling resistance meter is appropriate to determine the rolling resistance coefficient of roller skis’ wheels precisely.

scholarly journals Limitations of vehicle movement resistances: rolling resistance

2018 ◽  
Vol 19 (12) ◽  
pp. 256-259
Author(s):  
Piotr Wrzecioniarz ◽  
Wojciech Ambroszko ◽  
Aleksandra Pindel
Keyword(s):  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Rolling Resistance Coefficient ◽  
Vehicle Movement

In the paper limitations and exemplary methods of rolling resistance minimization are described. Changes of value of rolling resistance coefficient during years and values for exemplary rolling pairs are presented. Conclusions about future progress are formulated.

scholarly journals Rolling Resistance Estimation for PCR Tyre Design Using the Finite Element Method

2020 ◽  
Author(s):  
Sutisna Nanang Ali
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Total Force ◽  
Exhaust Gas Emission ◽  
Deformation Force ◽  
Rolling Resistance Coefficient ◽  
Alternative Designs ◽  
Element Method

This study presents rolling resistance estimation in the design process of passenger car radial (PCR) tyre by using finite element method. The rolling resistance coefficient of tyres has been becoming one of main requirements within the regulation in many countries as it is related to the level of allowable exhaust gas emission generated by vehicle. Therefore, the tyre being designed must be digitally simulated using finite element method before the tyre is manufactured to provide a high confident level and avoid unnecessary cost related to failure physical product testing. The simulation firstly computes the deformation of several alternative designs of tyres under certain loading, and then the value of deformation force in each tyre component during deformation took place is calculated. The total force of deformation is considered as energy loss or hysteresis loss resulted in tyre rolling resistance. The experiment was carried out on three different tyre designs: two grooves, three grooves, and four grooves. The four groove tyre design gave the smallest rolling resistance coefficient (RRC). Finally, the simulation was continued to compare different crown radius of the tyres and the result shows that the largest crown radius generates the lowest rolling resistance.

ENERGY ANALYSIS OF THE USE PHASE OF CONVENTIONAL TIRES COMPARED TO GUAYULE NR TIRES

2019 ◽  
Vol 92 (3) ◽  
pp. 578-588
Author(s):  
Ranjani B. Theregowda ◽  
Pragnya L. Eranki ◽  
Amy E. Landis
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Fuel Efficiency ◽  
Rolling Resistance ◽  
The United States ◽  
Resistance Coefficient ◽  
Critical Parameters ◽  
Linear Change ◽  
Rubber Tire ◽  
Use Phase

ABSTRACT Guayule NR can be grown in the United States and offers a potentially more secure and sustainable alternative to the substantial Hevea NR that is imported from Southeast Asia. This paper presents the first rolling resistance and use-phase energy consumption estimates for guayule tires. The results of this study show that use-phase life cycle energy reductions can be achieved with NRs and that the rolling resistance coefficient (RRcnew) and reference service life (RSL) of the new tire are the critical parameters that pertain to energy and fuel efficiency. A tire's use phase accounts for approximately 86% of its life cycle energy consumption and thus is an important consideration in sustainability assessments. We calculated the use-phase energy consumption for two types of NR tires: a 100% guayule rubber tire and an experimental epoxidized NR tire. These two NR tires were compared against a conventional passenger tire made by Cooper Tire & Rubber Company. The ISO product category rules for passenger tires were used to determine energy consumption, while relevant data were measured from concept tires built in collaboration with Cooper Tire & Rubber Company. The results of this analysis showed that both experimental NR tires have improved use-phase energy consumption compared to conventional rubber tires. Although the epoxidized NR tire with low RRcnew consumes the least energy during the use phase, it is currently not being considered for commercial manufacture. The 100% guayule rubber tire shows a 6% reduction in energy consumption compared to the conventional rubber tire. Results of the sensitivity analysis showed a linear change in use-phase energy consumption with the relevant tire load and RRcnew and an inverse change with the average vehicle fuel efficiency and the RSL.

Sign in / Sign up

Export Citation Format

Share Document