Geometric shape of the support surface of the piston

• Autorzy: Iskra A. , Babiak M. , Wróblewski E.

Identyfikatory

DOI

10.5604/12314005.1168450

• Języki publikacji: EN

Abstrakty

EN

Geometry of the slot between piston bearing surface and cylinder bore affects the friction losses of the IC engine to the far extent. It appears that these losses depend more on the area covered with oil than the thickness of oil layer separating collaborating parts. Barrel-shaped or stepwise piston bearing surface is the way to reduce the oil-covered area. The first concept has been used for years while the stepwise profile has not been applied for various reasons, although this idea providing higher load capacity of oil layer in stepwise slot was published in literature in the fifties of twentieth century. The stepwise profile can be obtained covering the cylindrical or tapered piston-bearing surface with a thin layer graphite. This paper presents the results of simulation leading to the reduction in friction losses and abrasive wear of piston bearing surface and cylinder bore. Covering the piston bearing surface with a thin layer of graphite one can get an extremely advantageous tribological properties of the piston assembly which means the expected parameters of oil film and in a case of film rupture – an ignorable abrasive wear of the graphite layer and/or cylinder bore.

Słowa kluczowe

EN

combustion engine; piston; friction losses

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2015
• Tom: Vol. 22, No. 4
• Strony: 95--101
• Opis fizyczny: bibliogr. 7 poz., rys.

Twórcy

autor

Iskra A.

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

autor

Babiak M.

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

autor

Wróblewski E.

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

Bibliografia

• [1] Deuss, T., Ehnis, H., Rose, R., Künzel, R., Reibleistungsmessungen am Befeuerten Diesel-motor – Einfluss von Kolbenschaftbeschichtungen, MTZ, Ausgabe 4, 2011.
• [2] Fahr, M., Hanke, W., Klimesch, Ch., Rehl, A., Reibungsreduzierung bei Kolbensystemen im Ottomotor, MTZ, Ausgabe 07-08, 2011.
• [3] Golloch, R., Untersuchungen zur Tribologie eines Dieselmotors im Bereich Kolbenring/ Zylinderlaufbuchse, VDI Verlag GmbH, Reihe 12, Nr. 473, Düsseldorf 2001.
• [4] Iskra, A., Studium konstrukcji i funkcjonalności pierścieni w grupie tłokowo-cylindrowej, Wydawnictwo Politechniki Poznańskiej, Poznan 1995.
• [5] Iskra, A., Babiak, M., Applying carbon nanotubes to reduce abrasive wear and friction in piston internal combustion engine groups, Eksploatacja i bezpieczeństwo pojazdów, KONMOT, pp. 249-264, Wydawnictwo Politechniki Krakowskiej, Krakow 2014.
• [6] Iskra, A., Babiak, M., Wróblewski, E., Characteristics of friction losses of aluminum and steel pistons for diesel engine passenger car, Combustion Engines, 162 (3), pp. 504-510, PTNSS, Bielsko-Biała 2015.
• [7] Iskra A., Krzymień P., Wróblewski, E., Geometry of the improved layer over a piston skirt, Combustion Engines, 162 (3), pp. 192-196, PTNSS, Bielsko-Biała 2015.