Influence of Inflation Pressure of a Tire on Rolling Resistance and Fuel Consumption

2017 ◽  
Author(s):  
Arthur Braga Thiriet ◽  
Fabrício José P. Pujatti ◽  
Paulo César S. Araújo
Keyword(s):  
Fuel Consumption ◽  
Rolling Resistance ◽  
Inflation Pressure

Potential impact of active tire pressure management on fuel consumption reduction in passenger vehicles

2018 ◽  
Vol 233 (4) ◽  
pp. 961-975 ◽  
Author(s):  
Stefano d’Ambrosio ◽  
Roberto Vitolo
Keyword(s):  
Fuel Consumption ◽  
Working Conditions ◽  
Management Strategies ◽  
Rolling Resistance ◽  
Pressure Control ◽  
Inflation Pressure ◽  
Pressure Management ◽  
Tire Pressure ◽  
Vehicle Performance ◽  
Passenger Vehicles

Active tire pressure management, through an automatic, electro-pneumatic, central tire inflation system, is here proposed as a means of improving fuel consumption in passenger vehicles, as well as safety and drivability. A brief description of the active tire pressure control system, which has been set up at the Politecnico di Torino, is provided as a reference. Different strategies, aimed at reducing rolling resistance, through inflation pressure management, under specific vehicle working conditions, are then illustrated. The fuel benefits that can be achieved by adopting these strategies in passenger vehicles are studied by means of computer simulations using a proprietary software for vehicle performance and fuel consumption estimation. Coast-down coefficients, evaluated experimentally during deceleration tests on a closed track, are generally available at the reference tire pressure prescribed by the original equipment manufacturer of the vehicle. These fixed coefficients can then be used to describe the vehicle in simulation environments. LaClair’s relation, which illustrates the influence of tire inflation pressure on rolling resistance, has therefore been used to recalculate the coast-down coefficients as functions of the tire pressure. This has allowed fuel consumption simulations to be performed on the reference B-segment passenger car under different working conditions. In particular, the following pressure management strategies have been studied: adaptation of the inflation pressure to the vertical load, variation of the inflation pressure during tire warm-up, and adjustment of the inflation pressure, according to the average speed (urban/highway driving). The performed simulations have demonstrated that if the standard tire pressure is maintained, fuel consumption could be reduced by up to 2% in real-world driving; further advantages could be obtained by varying the target pressure as a function of the current working conditions of the vehicle.

scholarly journals Evaluation of Fuel Consumption in Road Freight Transport

2013 ◽  
Vol 16 (1) ◽  
pp. 18-21 ◽  
Author(s):  
Mário Szabó ◽  
Radoslav Majdan ◽  
Zdenko Tkáč ◽  
Rastislav Čápora ◽  
Ľubomír Hujo
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Aerodynamic Resistance ◽  
Rolling Resistance ◽  
Freight Transport ◽  
Pressure Reduction ◽  
Inflation Pressure ◽  
Fuel Savings ◽  
Tyre Pressure ◽  
Road Freight

Abstract This paper deals with the importance of fuel economy in road freight transport. It provides the calculation of financial savings for fuel savings of 0.5 l per 100 km. In the subsequent part, some factors that influence the fuel consumption are specified, e.g. aerodynamic resistance, rolling resistance, and tyre inflation pressure. The effect of tyre inflation pressure on fuel economy has been tested on four selected towing vehicles. Based on the results obtained, it can be stated that tyre pressure has a great impact on fuel consumption. A one-bar pressure reduction of tyres can increase the fuel consumption by 0.5 l per 100 km.

scholarly journals Do Changes in Temperature and Inflation Pressure Affect Rolling Resistance during Road and Track Testing for Fuel Economy of Class 8 Tractor-Trailers?

2018 ◽  
Vol 46 (2) ◽  
pp. 93-104 ◽  
Author(s):  
L. J. Bachman
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Rolling Resistance ◽  
Resistance Force ◽  
Inflation Pressure ◽  
Tire Pressure ◽  
Air Cavity ◽  
Warm Up ◽  
The Relationship ◽  
Resistance Tests

ABSTRACT Data from air cavity thermistors, tire pressure–monitoring systems (TPMS), and SAE J1269 rolling resistance tests were analyzed to evaluate the significance of changes in tire pressure on rolling resistance during fuel economy tests of class 8 tractor trailers. Thermistor data show that air cavity temperatures vary, with the main increase happening during the warm-up run and measurable cooling during the fuel measurement breaks between runs. Inflation pressure also increases by 50–70 kPa during the warm-up run, but once the tire has warmed up, the pressure is more stable, rarely varying by more than 20 kPa during a test run. Results of SAE J1269 rolling resistance tests allow estimation of rolling resistance force for any specified load and inflation pressure. Using the test weight of the truck, the rolling resistance force was estimated for inflation pressures ranging from 550 to 860 kPa. The relationship between the inflation pressure and rolling resistance was roughly linear. The relationship was then used to estimate changes in fuel consumption due to changes in inflation pressure normalized to the cold inflation pressure. For each change of relative inflation pressure of 5%, rolling resistance would change by about 1%. Using a common return factor of a 1% change in fuel consumption for every 5% change in rolling resistance, a change in relative inflation pressure of 5% would result in a change of fuel consumption of about 0.2%. The precision of the J1321 fuel economy tests was measured to be plus or minus about 1%. This suggests that the warm-up run provided for the test method stabilizes the tire pressure and rolling resistance and that interference due to changes in rolling resistance during a test run or between runs is a concern only for tests that measure small changes in fuel consumption. While the results obtained here are used to assess the effect of inflation pressure on the SAE J1321 test and apply only to the particular tires tested, the method of analysis may be useful in the assessment of the effect of over- or underinflated tires on fuel consumption in the wider long-haul trucking fleet.

Light-Weight Tire Concept

1996 ◽  
Vol 24 (2) ◽  
pp. 119-131
Author(s):  
F. Lux ◽  
H. Stumpf
Keyword(s):  
Fuel Consumption ◽  
Automobile Industry ◽  
Rolling Resistance ◽  
Performance Standards ◽  
Light Weight ◽  
Production Methods ◽  
Lower Fuel Consumption ◽  
Material Resources ◽  
The Past ◽  
Tire Production

Abstract Current demands by the consumer, the automobile industry, and the environment have determined the basis of this investigation. In the past, the requirements—ever faster, ever sportier—were accepted as decisive parameters for the development of our study. In the future, rational and safety-related tire characteristics as well as environmental consciousness will increase, whereas purely performance-related parameters will diminish in their importance. Through our light-weight tire project, we have paved the way for future tire generations. The first priority is the minimal use of material resources; this means a reduction of materials and energy in tire production by using advanced design and production methods without sacrificing performance standards. This benefits the consumer—the final judge of all of our activities—by considerably reducing the rolling resistance, leading to lower fuel consumption. Further design targets include the improvement of rolling behavior and increased comfort by reducing tire weight, and therefore a reduction in unsprung masses on the vehicle.

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.

A Train Operations and Energy Simulator Model of the Steered Frame Truck

2009 ◽  
Author(s):  
John P. Wachsmuth ◽  
G. Walter Rosenberger ◽  
Robert W. Blank
Keyword(s):  
Fuel Consumption ◽  
Average Velocity ◽  
Rolling Resistance ◽  
Considerable Reduction ◽  
Lateral Forces ◽  
Train Operation ◽  
Potential Benefits ◽  
Air Brakes

A Train Operation and Energy Simulator (TOES™) model was created in order to investigate the potential benefits of replacing three-piece trucks with the “Steered Frame Truck” currently under development. Loaded coal trains were simulated with three-piece trucks and with Steered Frame Trucks. Both trains were modeled traveling on Norfolk Southern’s Pocahontas division from MP V435 to V399. The consist and direction of travel are based on actual trains in service. It was found that the model predicts several benefits for replacing three-piece trucks with Steered Frame Trucks. These resulted from the Steered Frame Truck having a greatly reduced rolling resistance while traveling around a curve. The benefits were found to include: a significant reduction in fuel consumption, a reduction in in-train forces, and a small increase in average velocity. One drawback was also predicted: that the reduced rolling resistance would necessitate the increased use of air brakes while traveling down-hill. Although Steered Frame Trucks should produce a considerable reduction in lateral forces, modeling such a reduction was beyond the scope of this work. Similarly, modeling other potential benefits not directly derived from the Steered Frame Truck’s reduced rolling resistance was not considered here.

Experimental validation of tyre inflation pressure model to reduce fuel consumption during soil tillage

2019 ◽  
Vol 186 ◽  
pp. 45-59 ◽  
Author(s):  
Aušra Čiplienė ◽  
Povilas Gurevičius ◽  
Algirdas Janulevičius ◽  
Vidas Damanauskas
Keyword(s):  
Fuel Consumption ◽  
Experimental Validation ◽  
Soil Tillage ◽  
Reduce Fuel Consumption ◽  
Inflation Pressure
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