Upload
bocah666
View
503
Download
9
Tags:
Embed Size (px)
DESCRIPTION
Citation preview
Nugraha KartasasmitaVice Chairman - Indonesian Lube Society (MASPI)
Fundamental Drivers of Lubricant Quality
1. TECHNOLOGY – ENVIRONMENTAL – FUEL ECONOMY DEMAND
2. FUEL TREND DEMAND
Technology Environmental
– Fuel Economy Environmental Demand
End User Demand OEM Respons Lubricant Respons
• Emission Legislation
• Reduce burden of Ownership
• Engine/Equip- ment Changes
• Higher Quality• Extended Drain
• Corporate Average Treatment
• Extended drain • Exhaust After Treatment
• Fuel Economy Standard
• Higher reliability• Lower Operation• Lower Life Time
Cost
• Exhaust After Treatment Device
• Improved Fuel Efficiency
• Device Compatibility
• Fuel Economy
Future LubricantEngine:
Higher speedHigher efficiencyHigher operating temperatureLower emissionCompatibility to renewable fuel
Lubricant :Lower viscosityHigher oxidation stabilityHigher viscosity indexCompatibility to renewable fuel
Lubricant Improvement
Implication for Lubricant Product
Continuous up-gradation of lubricant quality levels:
SAE 15W40 / 10W30 / 10W40 / 5W40 / 0W30 / 0W20Group II / III / IV/V base stocks
2. FUEL TREND DEMAND
Bio-Fuel = Future FuelSource:
Vegetable OilsAnimal Fats
Process: Trans EsterificationUsing Alcohol (Methanol/Ethanol)
Product form:ester (Fatty Acid Methyl Esther FAME)glycerin
FAME blended with Diesel Fuel at:5% (B5), 10% (B10), 20% (B20)
Bio-Fuel = Future FuelEurope:
Rape seed methyl esterTypically B05
United State (US):Soy bean methyl esterBio-diesel typically B20
Asia Pacific:Palm oil methyl esterTypically B05
Impact Bio-Fuel to Lubricant
Impact of bio-diesel on:engine cleanliness potential consequences of fuel dilutioncontamination of the engine oil
Droplet characteristics + lower volatility + spray pattern + wall impingement non-combusted bio-diesel (past the piston rings) fuel dilution
OxidationUnsaturated (particularly polyunsaturated fatty acid esters: derived from corn, olive and sunflower oils) exhibit poor oxidative stabilityUn burnt bio-diesel entering the oil sump oxidized lubricant degradation and thickening
Injector FoulingFree fatty acids + water increased corrosion of the injector systemPresence of glycerol + viscous glycerides contribute injector cokingHigher quantities of bio-diesel increase injector fouling (due to the thermo-oxidation and thermal polymerization properties of unsaturated bio-diesel)If injector tip deposits build up spray pattern disrupted
piston deposits increase ring-sticking and increase fuel dilution
Wear and Corrosion
High level of fuel dilution reduce the oil viscosity lower oil film
thickness higher friction higher wear
Oil QualityBio-diesel entering the oil sump may undergo oxidative polymerization
severe sludge precipitation significant loss of dispersancy / antioxidancy increase in piston deposits ring-sticking
ConclusionSupport Future Emission Regulation
Lower viscosityHigher viscosity stabilityHigher oxidation stability
Compatibility to Bio-FuelHigher oxidation stabilityHigher viscosity stabilityBetter dispersancyBetter detergencyHigher thermal stability