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Rapid Oil Consumption Measurement

Rapid Oil Consumption Measurement. A new instrument for optimisation of lube oil formulation and reduction of oil related emissions. 3rd International Conference LUBRICANTS RUSSIA - 2007 -. Oil Consumption – Oil Emission. oil sump balance. oil consumption. oil emission. crack products &

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Rapid Oil Consumption Measurement

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  1. Rapid Oil Consumption Measurement A new instrument for optimisation of lube oil formulation and reduction of oil related emissions 3rd International Conference LUBRICANTS RUSSIA - 2007 -

  2. Oil Consumption – Oil Emission oil sump balance oil consumption oil emission crack products & PM unburnt HCs from lubeoil lubeoil in exhaust gas scraping fuel reverse bBlow-by combustion deposits, water evaporation flinging off Blow-by deposits in engine leakages valve lubrication lubrication TC lubrication piston- piston ring-cylinder oil sump volume = lubeoil + fuel + water + ... fresh oil

  3. Mechanism Evaporation Temperatures 0 - 720° Crank Angle evaporation Log (T) piston top ring 2nd ring oilfilm liner oilfilm oil evaporation cooling water cylinder liner water combustion chamber above piston

  4. Oil Consumption MeasurementMethods without tracer groups of HC- molecules, unchanged fuels + lubes selective ion calculation in mass spectra with tracer radioactive not radioactive conventional gravimetric volumetric Tritium Brom SO2 Chlor Pyren drain / weigh method level measurement

  5. Composition of Fuels & Lubes Hydrocarbons carbon hydrogen overlap distance

  6. Measuring MethodMass Segments for Oil Emission benzene ring-shaped hydrocarbons CO2 xylene toluene Ar ambient air substances O2 aliphatic hydrocarbons N2 H2O Intensity Gasoline < 160 m/z Oil emission measuring range > 170 m/z Diesel fuel < 290 m/z Oemr > 300 m/z 350 300 250 200 150 100 50 0 Mass(m) / Charge (z) [Atomic mass units]

  7. Rapid Oil Emission Measurement Principle ion source hexapol quadrupoles pre vacuum mass spectrometer high vacuum detector sampling in exhaust system vacuum pump Frequency < 250 Hz

  8. Stationary Comparison of OilsOil related oil consumption differences 4-cyl 2 litres gasoline engine • measurement • flushing • measurement • flushing • measurement • flushing

  9. Comparison of Oils over Time delta fresh delta eot running in increasing level • combination of • online methods: • rapid oil emission • radio nuclid wear • + simulation • + calculation running in constant low level

  10. Comparison of Oil Emission Maps OIL A OIL B 20 h 300 h

  11. Comparison of Oil Emission Maps vs Time

  12. Influence of Motoring / Intake VacuumDynamic Behaviour modified by motoring fired: 20Nm load motored: throttle closed 100 90 80 70 60 oil emission [g/h] 50 40 30 20 10 0 0 100 200 300 400 500 600 700 time [s]

  13. Dynamic Comparison of OilsTest Cycle 4-cyl 2 litres gasoline engine

  14. Dynamic Comparison of Oils C, D & ETest Results 4-cyl 2 litres gasoline engine WOT oil consumptions D < E < C peak oil consumptions D < C < E Peak oil consumption up to 500 g/h

  15. Summary & Conclusions • A new rapid oil consumption measurement technique allows measurements up to 250 Hz • This enables the "fine tuning" of lube oils like no other method • For some OEMs the traditional oil quality specifications, together with their on top in-house requirements are no longer sufficient • Oil quality and formulation modifications can quickly be compared without influence of changes in the engine • In combination with online wear measurement this is the quickest development tool for the moment • Simulation techniques and calculations can additionally support the lube oil development

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