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Recent Engine Tribological Investigations at Tokyo City University

TriboBr-2010. 24-26 November, 2010. Recent Engine Tribological Investigations at Tokyo City University. Akemi Ito. Associate Professor Automotive Engine Laboratory. Engineering. Knowledge Engineering. Environmental and Information Studies. Urban Life Studies. Human Life Sciences.

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Recent Engine Tribological Investigations at Tokyo City University

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  1. TriboBr-2010 24-26 November, 2010 Recent Engine Tribological Investigations at Tokyo City University Akemi Ito Associate Professor Automotive Engine Laboratory

  2. Engineering Knowledge Engineering Environmental and Information Studies Urban Life Studies Human Life Sciences Photograph of Musashi Institute of Technology in 1931 Musashi Institute of Technology Established in 1929 Renamed as Tokyo City University last year

  3. Recent view of Tokyo City University

  4. Biomedical Engineering Operation room

  5. Atomic Energy Research Laboratory

  6. Hydrogen fueled engine automobile “Musashi 8”

  7. History of Engine Research in Musashi Institute of Technology and Tokyo City University 1951 Engine Research Laboratory - Combustion of engines Prof. Furuhama - Thin film sensors - Engine tribology 1970 2009.4 - Hydrogen fueled engine Automotive Engine Laboratory - Engine tribology - H2 engine for practical use Hydrogen Energy Research Center 1992 - Advanced H2 engine - Fuel cell - Liquid H2 pump & tank

  8. Oil Consumption Wrist-pin Lubrication Research Concerning environmentally friendly engines Piston Friction Hydrogen Engine

  9. Research staff of the Automotive Engine Laboratory Dr. Akemi Ito, Associate professor Dr. Hidekazu Suzuki Budget Dr. Dalwoo Kim (2010) Hideyuki Iwasaki Shuma Aoki 7 graduate students Government Private Sector 2 undergraduate students 1 technician 12 private companies

  10. Requirementsfor the reduction of CO2 emissions CO2 emissions in Japan A reduction in CO2 emission from engines is required

  11. Poor bio-resources in Japan Reduction in CO2 emissions from engines Using alternative fuels (Biofuels) Improvement In the thermal efficiency of engines Main approach for reduction in CO2 emissions from engines in Japan Reduction of friction losses in engines

  12. Gasoline engine Incomplete combustion Exhaust loss Cooling loss Supply energy [%] Friction loss Output Engine load [%] Reduction of friction losses in engines for in-town use

  13. Water pump, Alternator Friction loss Oil pump Valve train Friction Mean Effective Pressure [kPa] Piston, Piston-ring, Connecting-rod Main bearing Engine speed [rpm] Reduction of friction losses in engines

  14. Recent activities in engine tribology at TCU (1) Friction reduction of pistons By Dr. Suzuki

  15. Principle of measurement of piston friction force Head Cylinder block Piston Floating liner Load sensor

  16. 燃焼圧 シール部 浮動ライナ部 ピエゾロードワッシャ ライナ支持環状薄板 ２重ライナ構造 Combustion gas sealing parts Floating liner Measurement apparatus for piston friction forces Piezo-type load sensors Lateral stopper Floating liner

  17. Glass liner Oil film observation method Coating to reduce reflection

  18. Piston A Piston B Piston C Comparison of measured / calculated piston friction Piston A, Piston B Piston C Piston A Piston B

  19. Calculated Measured Measured/calculated friction forces

  20. Oil film thickness Piston C Piston A Observed oil film on piston skirts Piston B 1200 rpm, 380 kPa (IMEP) Pmax=2.2 MPa, 0～720 deg.

  21. Recent activitiesin engine tribology at TCU (2) Friction reduction of piston-rings

  22. Effect of piston-ring tension on friction

  23. Friction loss and engine oil consumption

  24. Recent activities in engine tribology at TCU (3) Reduction of engine oil consumption

  25. Increase in particulate matter Back of piston ring Piston ring sliding surface Piston ring gap Clogging of diesel particulate filter Customers’ operating costs Engine oil consumption

  26. Measurement apparatus for cylinder bore deformation

  27. Sulfur caused oil consumption Exhaust gas Oil Engine Method of measurement of oil consumption

  28. Typical measurement results of cylinder bore deformation Block type 1 Block type 2

  29. Oil consumption of Block Types 1 and 2

  30. Conclusions For environmentally friendly engine Improvement of thermal efficiency of engines Increase in cylinder pressure Increase in severity of sliding surface Reducing friction losses Using alternative fuels Negative effect on lubricants and Sliding surface Tribological investigation of engines occupies an important role in the research of environmentally friendly engines

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