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ENGINE LUBRICATION SYSTEM & NETWORK ANALYSIS

ENGINE LUBRICATION SYSTEM & NETWORK ANALYSIS. PRATK JOSHI. CONTENTS. Introduction Properties of lubricant Components used in lubrication system Engine lubrication system Flow network analysis Oil pump flow analysis Oil filter flow analysis Hydraulic tappet analysis Summary References.

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ENGINE LUBRICATION SYSTEM & NETWORK ANALYSIS

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  1. ENGINE LUBRICATION SYSTEM & NETWORK ANALYSIS PRATK JOSHI

  2. CONTENTS • Introduction • Properties of lubricant • Components used in lubrication system • Engine lubrication system • Flow network analysis • Oil pump flow analysis • Oil filter flow analysis • Hydraulic tappet analysis • Summary • References

  3. INTRODUCTION • To supply the lubricating oil between the moving parts is termed as lubrication system • Lubrication of all the parts in engine is essential to avoid: • Friction • wear • To prevent the seizure

  4. PROPERTIES OF LUBRICANTS • Viscosity • Density • Specific heat • Flash point • Adhesiveness • Chemical stability

  5. COMPONENTS IN LUBRICATION SYSTEM • Oil sump or Oil tank • Oil pump • Oil filter and strainer • Oil pressure gauge • Oil level indicator

  6. LUBRICATION SYSTEM

  7. FLOW NETWORK THEORY • Flow rate & pressure drop through flow is calculated using two theories • Theory of mass conservation • The continuity of energy per unit mass

  8. PIPE FLOW ANALYSIS • For incompressible flow, pressure drop through pipe is given by Fanning equation • Where K is dimensionless experimental coefficient accounting head loss in bends, elbows, T-joints etc.

  9. = Friction factor which depends on the type of flow

  10. OIL PUMP FLOW ANALYSIS • Gear pump with crescent guide between internal & external gear can be used as oil pump • Flow rate increases with increase in angular velocity

  11. OIL FILTER ANALYSIS • Oil filter is used to filter out the dirt and grit particle from oil • Lubricating oil is passed through the filter before passing to bearings FIG: Oil filter

  12. The pressure difference and flow rate can be calculated by formulae: • where , are constants and can be obtain by curve fitting (from matlab)

  13. Fig: Flow characteristic of oil filter

  14. HYDRAULIC TAPPET FLOW ANALYSIS Fig: Hydraulic tappet

  15. SUMMARY • Lubrication system • Properties of lubricant • Components in lubrication system • Engine flow lubrication system • Network flow analysis • Pipe flow analysis • Oil pump flow analysis • Oil filter flow analysis

  16. REFRENCES • S.M.Chun(2002), “Network analysis of an engine lubricating system”, Tribology international, 12 December. • Tran p, Yamamoto T, Baba Y, Hoshi M, “ An Analysis of lubricating system of automobile gasoline engine”, SAE 871659, 1987. • B.C. Majumdar, “Introduction to Tribology of bearing”, S.Chand publication, second edition 2008.

  17. THANK U

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