Stabilizing piston speed with a layer of carbon nanotubes on the lateral surface of the piston

• Autorzy: Iskra A. , Babiak M. , Kałużny J. , Giersig M. , Kempa K.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the possibility of stabilizing higher harmonics of piston speed generated by torsional vibrations of the shaft. As a result of torsional vibrations, the transient speed of the piston deviates from the values resulting from the known formulae describing geometrical dependences of the piston position versus the angle of rotation of the crankshaft [1]. This phenomenon causes the desired effect of damping torsional vibrations. As it is known, in larger engines of the cylinder diameter exceeding 120mm and the number of in-line cylinders greater than or equal to 6, structural damping is insufficient and it becomes necessary to use torsional vibration dampers. In article [2] attention was drawn to the effect of damping higher harmonics of the moment generated by the engine whose lateral surfaces are coated with layers of nanotubes, which was not however, the main subject of the article. This work presents a preliminary analysis and determinants of the efficiency of vibration damping due to the impact of nanotubes on the reduction of the amplitude of higher harmonics of the moment generated by the engine. In addition, the possible mechanism of the phenomenon of vibration damping by a layer of nanotubes is presented. However, one should emphasize that at this stage the authors do not close the debate concerning the mechanical properties of the structures based on carbon nanotubes (CNTs), but in fact, they open up such a discussion. Besides the confirmed properties of nanotubes, such as extremely high tensile strength of properly structured fiber formed by CNTs, there is very little data concerning the properties of chaotic structures in which nanotubes combine in larger structures adopting any directions. No less important is the base on which nanotubes are grown, and it can be very different. The authors of the paper have presented preliminary results of a positive impact of selected properties of CNTs on the vibrations of the crankshaft.

Słowa kluczowe

EN

friction in internal combustion engine; nanotubes layers; crankshaft torsional vibration

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2013
• Tom: Vol. 8, no 1
• Strony: 7--14
• Opis fizyczny: Bibliogr. 14 poz., rys., fot.

Twórcy

autor

Iskra A.

• Poznan University of Technology Institute of Combustion Engines and Transport Piotrowo Street 3, 60-965 Poznań, Poland tel.: [phone], fax: [phone]

autor

Babiak M.

• Poznan University of Technology Institute of Combustion Engines and Transport Piotrowo Street 3, 60-965 Poznań, Poland tel.: [phone], fax: [phone]

autor

Kałużny J.

• Poznan University of Technology Institute of Combustion Engines and Transport Piotrowo Street 3, 60-965 Poznań, Poland tel.: [phone], fax: [phone]

autor

Giersig M.

• Freie Universitaet Berlin Arnimallee 14, 14195 Berlin tel.: [phone], fax: [phone]

autor

Kempa K.

• Boston College Chestnut Hill MA, 02467 Boston tel.: [phone], fax: [phone]

Bibliografia

• [1] Iskra, A., Dynamika mechanizmów tłokowych silników spalinowych, Wydawnictwo Politechniki Poznańskiej, pp. 1-271, Poznań 1995.
• [2] Iskra, A., Babiak, M., Kałużny, J., Giersig, M., Kempa, K., Comparing the resistance to motion of piston coated with a layer of nanotubes with standard piston, Journal of KONES 2012, Paper ID: 095. European Science Society of Powertrain and Transport, pp. 225-233, Warsaw 2012.
• [3] Iskra, A., Studium konstrukcji i funkcjonalności pierścieni w grupie tłokowo-cylindrowej, Wydawnictwo Politechniki Poznańskiej, pp. 1-334, Poznań 1996.
• [4] Ciałkowski, M., Iskra, A., Giersig, M., Kempa, K., Wysokoefektywny samochodowy reaktor katalityczny na bazie trójwymiarowych hierarchicznych nanostruktur węglowych, Nr projektu: 3940/T02/2007/32, Poznań 2009.
• [5] K. Kinoshita, Electrochemical oxygen technology, John Wiley & Sons: New York, 1992.R. Durand, R. Faure, F. Gloaguen and D. Aberdam; R. R. Adzic, F. C. Ansonand K. Kinoshita, Eds., The Electrochem. Soc. Inc.: Pennington, Vol. 95-26, p 27, 1996.
• [6] Kabbabi, A., Gloaguen, F., Andolfatto, F., Durand, R., J. Electroanal. Chem., 373, pp. 251-254, 1994.
• [7] Frelink, T., Visscher, W., vanVeen, J. A. R., J. Electroanal. Chem., 382, pp. 65-72, 1995.
• [8] Takasu, Y., Ohashi, N., Zhang, X. G., Murakami, Y., Minagawa, H., Sato, S., Yahikozawa, K., Electrochim. Acta, 41, pp. 2595-2600, 1996.
• [9] Cherstiouk, O. V., Simonov, P. A., Savinova, E. R., Electrochim. Acta, 48, pp. 3851-3860, 2003.
• [10] Maillard, F., Eikerling, M., Cherstiouk, O. V., Schreier, S., Savinova, E. Stimming, U., Faraday Discuss., 125, pp. 357-377, 2004.
• [11] Arenz, M., Mayrhofer, K. J. J., Stamenkovic, V., Blizanac, B. B., Tomoyuki, T., Ross, P. N., Markovic, N. M., J. Am. Chem. Soc., 127, pp. 6819-6829, 2005.
• [12] Tang, Z. C., Geng, D. S., Lu, G. X., J. Colloid Interface Sci., 287, pp. 159-166, 2005.
• [13] Mukerjee, S., McBreen, J., J. Electroanal. Chem., 448, pp. 163-171, 1998.
• [14] Su n, Y., Zhuang, L., Lu, J., Hong, X., Liu, P. J., Am. Chem. Soc., 129, 15465-15467, 2007.