Dissertation > Excellent graduate degree dissertation topics show

Lubrication and Friction Analysis of Diesel Engine Piston Skirt and Optimal Design

Author: MaZhengYing
Tutor: ZhangJunHong
School: Tianjin University
Course: Power Machinery and Engineering
Keywords: piston skirt lubrication secondary motion diesel engine
CLC: TK421.9
Type: Master's thesis
Year: 2010
Downloads: 111
Quote: 0
Read: Download Dissertation

Abstract


It is important for improving the diesel engine performance to control the friction and lubrication condition of the piston skirt. Although there were many researches worked at this problem, the main issues were not solved totally. In order to reduce friction and improve reliability of the piston, the workload of piston design is heavy in traditional way, such as developping lots of piston samples, finishing lots of tests one by one, and lots of experiences on piston design. Obviously the method couldn’t meet the requirement of current piston design.In this thesis, the lubrication model which was combined with the secondary motion of piston, was established through the analysis of the pair of piston skirt and cylinder and was solved by using the FEA method. There are many parameters which influence on the lubrication performance of the piston skirt to optimize using this model. And the analysis of the simulation result could be the theoretical basis of the piston skirt design. In order to reduce the workload, the orthogonal test method was used on this optimization.Therefore, the following work was carried out:1. Establish the model of piston’s secondary motion through analyzing the equilibrium condition of forces on the piston, and solve this mathematical model by Runge-Kutta method using Matlab;2. Establish the lubrication model of piston skirt and cylinder sleece system by average reynolds equation, compile the FEA program to this model by Matlab, embed the FEA program into the program which solve the piston’s secondary motion, then obtain to calculate the piston skirtlubrication model in a whole working cycle.3. Solve the Lubrication condition and secondary motion of the origin piston by the program.4. With the orthogonal test method, use the program established to optimize parameters such as piston pin offset, fitting clearance, position of the max diameter, piston skirt length, ellipticity and curvature of piston skirt profile; choose the best matching scheme; and then calculate the scheme and verify that the optimization is effective.

Related Dissertations

  1. The Air Linear Motion Reference Design Based on Multi-Throttle,TG83
  2. High Pressure Common Rail Diesel Engine Fueled with Biodiesel test under different atmospheric pressure,TE667
  3. Applied Research of Emulsified Fuel on S195 Diesel Engine,TE626.24
  4. Marine water lubricated bearing lubrication pump performance test study,TH133.3
  5. Study on Preparation and Tribological Properties of Copper Matrix with SiC and Carbon Onions Self-lubricating Composites,TB33
  6. Based on multi-body dynamics of the diesel engine body structure strength analysis,TK421
  7. 4100QB-2 diesel engine fueled with bio - diesel tank Working Process Simulation and Experimental Study,TK427
  8. A Numerical Simulation Study on Piston Skirt Profile Design,TK403
  9. Numerical Simulation on Effects of Injector Nozzle-Hole Layout on Combustion and Emissions in a DI Diesel Engine,TK421.5
  10. The Development of A Hd Diesel Engine Combustion System Based on EGR,TK423
  11. Design of Electronic Control Unit for Electric Supercharger,TK423
  12. Investigations on Performance of a CR Diesel Engine Operating on DECC,TK401
  13. Studies on the Elastohydrodynamic Lubrication of Involute Helical Gears,TH117.2
  14. Research on Nonlinear Vibration of Diesel Shafting Including Gas Forces,TB533
  15. Research on Tribological Properties of Textured UHMWPE,O313.5
  16. The Application and Research on the Lubrication Rolling in the Hot Strip Mill,TG335.11
  17. Theoretical and Experimental Research on Lubrication Regime in Cold Strip Rolling,TG335.12
  18. Study on Formation Mechanism of Oil Film and Key Technology in Independent Lubrication Injector of DME Engine,TK428.9
  19. Highland environment under high pressure common rail diesel engine fueled with biodiesel applications,TK427
  20. The Study of Flame Lift-off Length,TK421

CLC: > Industrial Technology > Energy and Power Engineering > Internal combustion engine > Diesel engine > Theory > Lubricating
© 2012 www.DissertationTopic.Net  Mobile