Wyniki wyszukiwania - BazTech

1

Energy consumption estimation of non-pneumatic tire and pneumatic tire during rolling

Jackowski J., Wieczorek M., Żmuda M.

Journal of KONES

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2018

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Vol. 25, No. 1

159--168

EN

The characteristics of the car tire, and especially its deformation and interaction road, are mainly factors affected the energy consumption of the vehicle and consequently the amount of fuel consumption and emissions to the environment the harmful exhaust gas components. It is estimated that approximately 80-90% of the total energy losses (rolling resistance) are due to internal tire friction, which occurs during its deformation, the remaining 10-20% are ventilation losses, tread face interaction with the road surface and cyclical compression and expansion of air enclosed in the tire. Non-pneumatic tires (NPT) (as a direction of development) are the alternative solutions for conventional tires. Their advantages are as follows maintenance-free and the resistance to typical for pneumatic tires mechanical damages can be a major cause of their widespread use in future (and thus electric) cars. In the available publications, the results of the estimation of the features NPT based on numerical simulations are only presented. There is lack of experimental research results concerning real objects, which determine their driving properties. Presented work is an attempt to check how the change in wheel structure affects the energy consumption of rolling wheels. Research objects (non-pneumatic tire and pneumatic tire) were selected for the size and destination compatibility. Experimental research were carried out at a universal quasi-static tire testing station, which is located at the Institute of Mechanical Vehicles and Transport at the Department of Mechanical at the Military University of Technology. According to the authors, the obtained results can be an interesting and unique supplement to the problem of assessing the properties of new and future (non-pneumatic tire) construction of vehicle wheels.

2

Evaluation of the energy harvestable from an airless tire equipped with piezoelectric bimorphs on the lamellar spokes

Suciu C. V., Koyanagi K.

Journal of Telecommunications and Information Technology

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2013

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nr 4

79--84

EN

In this work, one evaluates the electrical power generated by an airless tire equipped with piezoelectric bimorphs on both lateral surfaces of the radially distributed lamellar spokes. Such sheet-like spokes are hinged both toward the wheel drum at the inner annular band, and toward the wheel tread at the outer annular band. Since the hinged spokes are able to transmit tension forces but unable to transmit compression forces, bending and buckling of the spokes occur in the region of contact between the tire and the road. Models for the rolling friction of the airless tire, for the bending and buckling deformation of the spokes, and for the electrical power generated by the airless tire are suggested. Variation of the curvature radii and bending deformations for the spokes in the region of contact with the road are illustrated for various values of the rolling friction coefficient and spoke length. Then, variation of the generated electrical power versus the length of contact is obtained for various travel speeds of the vehicle. One observes that the generated electrical power increases at augmentation of the rolling friction coefficient, spoke length and travel speed. Although the obtained electrical power for the proposed harvesting system is relatively modest, it is not depending on the road roughness, i.e. harvesting becomes possible even on smooth roads, such as highway surfaces.

3

Tweel as an example of airless tire in low-speed applications

Matuszewska M., Korczak W.

Logistyka

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2009

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nr 3

CD-CD

PL

W referacie przedstawiono budowę oraz wykorzystanie opon typu Tweel - opon bez powietrza. Zwrócono uwagę na pozytywne jak i negatywne skutki płynące z zastosowania opon typu Tweel w pojazdach osobowych i użytkowych.

EN

In this paper the Tweel - Airless Tires are presented. Their constructions and using – are shown. The author pays attention on such questions like: features and benefits from using airless tire in vehicles.