先进陶瓷摩擦材料在离合器中的润滑.pdf

Advanced ceramics as friction material in lubricated clutch systems Johannes Bernhardt n, Albert Albers, Sascha Ott IPEKInstitute of Product Engineering, Karlsruhe Institute of Technology (KIT), Germany a r t i c l e i n f o Article history: Received 4 August 2011 Received in revised form 30 July 2012 Accepted 1 August 2012 Available online 18 August 2012 Keywords: Advanced ceramics Lubricated multi-disc clutch Oil fl ow Particle image velocimetry a b s t r a c t The trend in development of mobility systems is very much infl uenced by the need of reducing CO2 emission. For this reason it is important to increase power density and effi ciency of vehicles powertrain by improving single powertrain components as well as developing completely new powertrain concepts. Shiftable clutches are infl uencing the dynamic behaviour as well as the energy effi ciency of the powertrain due to complex interaction within the system. Power density is very much infl uenced by the tribological contact of clutch systems which is very important concerning fulfi lling systems functionality. The paper focuses experimental investigations of lubricated clutch systems. New experimental methods to determine the oil fl ow within the tribological contact are presented. Based on these results the potential concerning increasing power density and the methods and tools to support development of tribological systems based on advanced ceramics will be discussed. 101:11826. 2 Bach H. Systematische Suche und schwingungstechnische Absch atzung neuer Wirkprinzipien f ur alternative Drehschwingungsentkopplungssysteme im PKW-Antriebsstrang. VDI-Berichte Number 1749 2003:6988. 3 McGrath M, M uller B, Maucher E, Marathe B, Bailey G. Der Drehmoment- wandler. LuK Kolloquium 2002;4:2131. 4 H ohn, B R, Pfl aum, H.; H ammerl, B.: A new calculation method for load carrying capacity of wet running multi-clutches in application with variable load, In: 4th World Congress on Gearing and Power Transmission Paris. 16./ 18.03.1999, p. 126577. 5 H ohn B-R, Pfl aum H, H ammerl B. Ermittlung der Leistungsgrenzen olgek uhlter Lamellenkupplungen anhand von Temperaturkriterien. VDI-Berichte Number 1323 1997:50725. 6 Ingram M, Reddyhoff T, Spikes HA. Thermal Behaviour of a Slipping Wet Clutch Contact. Tribology Letters 2011;41:2332. 7 Albers A, Bernhardt J, Ott S. Development and validation of lubricated multi-disc clutch systems with advanced ceramics,Proceedings of the Institution of Mechan- ical Engineers. Part J: Journal of Engineering Tribology 2011;225(7):6115 July. Fig. 17. Multi-disc clutch using ceramics with completely oil fi lled groove (1000 rpm, 1.5 l/min).