Tire Testing for Rolling Resistance and Fuel Economy

1975 ◽  
Author(s):  
D.A. Glemming ◽  
P.A. Bowers
Keyword(s):  
Fuel Economy ◽  
Rolling Resistance ◽  
Tire Testing

Tire Testing for Rolling Resistance and Fuel Economy

1974 ◽  
Vol 2 (4) ◽  
pp. 286-311 ◽  
Author(s):  
D. A. Glemming ◽  
P. A. Bowers
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Laboratory Testing ◽  
Rolling Resistance ◽  
Test Methods ◽  
Test Parameter ◽  
Factors Influencing ◽  
Tire Testing ◽  
Road Testing

Abstract The rolling resistance of tires and the fundamental factors influencing rolling resistance during laboratory and road testing are discussed. Test methodologies for vehicle fuel consumption, vehicle coast-down, rolling resistance trailer measurements, and laboratory testing are described. This paper is confined to passenger tire characteristics and deals primarily with test techniques, although some observations are made regarding tire construction, the effect of environment, comparison of test methods, test parameter effects, and the interrelationships between various test modes.

Commercial Trailer Tires: Tire Inflation and Its Effect on Rolling Resistance, Fuel Economy, and Tire Footprint

2015 ◽  
Vol 43 (2) ◽  
pp. 144-162
Author(s):  
Al Cohn
Keyword(s):  
Fuel Economy ◽  
Rolling Resistance ◽  
Maintenance Cost ◽  
Wear Loss ◽  
Truck Tires ◽  
Footprint Analysis ◽  
Subsequent Loss ◽  
Resistance Data

ABSTRACT Maintaining proper tire inflation is the number one issue facing commercial fleets today. Common, slow-leaking tread area punctures along with leaking valve stems and osmosis through the tire casing lead to tire underinflation with a subsequent loss in fuel economy, reduction in retreadability, tread wear loss, irregular wear, and increase in tire-related roadside service calls. Commercial truck tires are the highest maintenance cost for fleets second only to fuel. This article will examine tire footprint analysis, rolling resistance data, and the effect on vehicle fuel economy from tires run at a variety of underinflated, overinflated, and recommended tire pressures. This analysis will also include the tire footprint impact by running tires on both fully loaded and unloaded trailers. The footprint analysis addresses both standard dual tires (295/75R22.5) along with the newer increasingly popular wide-base tire size 445/50R22.5.

The Study of Fuel-Saving Technology of GSI

2014 ◽  
Vol 1070-1072 ◽  
pp. 392-397
Author(s):  
Jun Hui Xu ◽  
Ming Qiu Gao ◽  
Ji Qiang Gao ◽  
Xiang Bao
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Rolling Resistance ◽  
Fuel Saving ◽  
Pressure Monitoring ◽  
Tire Pressure ◽  
Engine Efficiency ◽  
Tire Pressure Monitoring System ◽  
The Eu

In the background of the main technologies of fuel economy in automobiles developed to a certain stage, it is necessary to reduce fuel consumption and increase the engine efficiency by developing other auxiliary technologies such as improving the ratio of pure energy drive, low rolling resistance tires, tire pressure monitoring system and gear shift indicators (GSI). This article introduces the principle of GSI, analyses how GSI works in improving engine efficiency, and then evaluates the method for determination of the relative saving rate of fuel consumption, which method was introduced in the EU regulation EC No. 65/2012.

Three-parameter transmission gear-shifting schedule for improved fuel economy

2017 ◽  
Vol 232 (4) ◽  
pp. 521-533 ◽  
Author(s):  
Chengsheng Miao ◽  
Haiou Liu ◽  
Guoming G Zhu
Keyword(s):  
Least Squares ◽  
Fuel Economy ◽  
Least Squares Method ◽  
Test Procedure ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Recursive Least Squares ◽  
Moving Least Squares Method ◽  
Two Parameter ◽  
Transmission Gear

Traditionally the transmission gear-shifting schedule is based upon the throttle position and the vehicle (or engine) speed. This paper proposes to add a third parameter, called the terrain coefficient, to form a three-parameter gear-shifting schedule for improving the fuel economy of a vehicle. The terrain coefficient is a compound parameter consisting of the road grade and the rolling resistance coefficient. It can be estimated in real time by the proposed multi-step recursive least-squares method. The dynamic programming and the moving least-squares method are adopted to optimize the gear sequences and to generate the three-parameter gear-shifting schedule. The proposed gear-shifting schedule is evaluated against the traditional two-parameter gear-shifting schedule via Simulink simulations and on-road experiments using a heavy-duty vehicle. The simulation results for the Urban Dynamometer Driving Schedule and the US06 Supplemental Federal Test Procedure driving cycles show that the fuel economies of the proposed gear-shifting schedule are improved by 3.3% and 2.7% respectively over that of the traditional two-parameter schedule. The experimental results indicate that the three-parameter gear-shifting schedule improves the fuel economy by 3.5% over the traditional schedule with a satisfactory acceleration performance.

Esso Energy Award Lecture, 1984 - A new tyre polymer improving fuel economy and safety

1985 ◽  
Vol 399 (1816) ◽  
pp. 1-24 ◽  
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Dynamic Properties ◽  
Rolling Resistance ◽  
Road Surface ◽  
Vehicle Testing ◽  
Wet Grip ◽  
New Hypothesis ◽  
Tyre Industry

A new philosophy, relating to both rolling resistance (fuel consumption) and wet grip (safety), has been developed, based on measurements of the dynamic properties of tread compounds in the laboratory under conditions approaching those existing at the tyre-road surface interface under both rolling and wet sliding conditions. The generally accepted wet grip theories used throughout the tyre industry lead to the conclusion that when wet grip is improved, there is an increase in rolling resistance. The new philosophy enabled a tailor-made polymer to be developed that broke away from convention and gave a reduced rolling resistance while improving wet grip. Extensive laboratory and vehicle testing was performed on tyres made with the new polymer, to verify the new hypothesis and to ensure that the polymer was a commercial proposition before it was officially announced and introduced into commercial tyres during late 1981.

MATERIALS DEVELOPMENT FOR LOWERING ROLLING RESISTANCE OF TIRES

2016 ◽  
Vol 89 (1) ◽  
pp. 79-116 ◽  
Author(s):  
Ping Zhang ◽  
Michael Morris ◽  
Dhaval Doshi
Keyword(s):  
High Temperatures ◽  
Fuel Economy ◽  
Operating Cost ◽  
Rolling Resistance ◽  
Hysteresis Loss ◽  
Market Demand ◽  
Fuel Cost ◽  
Heavy Duty ◽  
Truck Tires ◽  
Rubber Compounds

ABSTRACT Many countries are implementing regulatory programs to promote the use of transportation technologies that can reduce greenhouse gas emissions and enhance fuel economy of vehicles. These regulatory programs create a need for more durable and fuel-efficient tires. The increased cost of fuel for motor vehicles creates another driving force for improving the fuel economy of vehicles. Commercial vehicle operators recognize that fuel cost is a major driver of the total operating cost; therefore, they increasingly demand tires that are optimized for reducing the fuel cost of a trucking fleet. Rolling resistance of truck tires accounts for about one-third of the power required to move a heavy-duty truck and is the second most important contributor, after engine loss, to the total energy loss of heavy-duty trucks. Other than tire designs, rubber compound hysteresis contributes to the rolling resistance of tires, which affects vehicle fuel economy. There is a significant market demand, due to governmental regulations, concerns for the environment, and cost savings to the consumers, for developing tread compounds or tread compound systems that can reduce tire rolling resistance while maintaining the treadwear and durability of truck tires. This paper reviews materials technologies developed for reducing the hysteresis loss of rubber compounds at high temperatures, hence lowering the rolling resistance of tires. Compounding approaches that can be used to lower the hysteresis loss of rubber compounds and to reduce rolling resistance of tires also are discussed. Developments in elastomers and reinforcing materials, including nanoparticles, are highlighted, with focus on the benefits of those polymers and particles in reducing the hysteresis loss at high temperatures of rubber compounds.

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