Technical Issues of Increased Ethanol Blends

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Information about Technical Issues of Increased Ethanol Blends
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Published on February 6, 2008

Author: Paola

Source: authorstream.com

TECHNICAL ISSUES OF INCREASED ETHANOL BLENDS:  TECHNICAL ISSUES OF INCREASED ETHANOL BLENDS Dr. Bruce Jones Director Minnesota Center for Automotive Research (MnCAR) Minnesota State University, Mankato GOVERNOR’S ETHANOL COALITION ST. PAUL, MN 9/26/2005 MINNESOTA CENTER FOR AUTOMOTIVE RESEARCH :  MINNESOTA CENTER FOR AUTOMOTIVE RESEARCH To provide industry and government with technical expertise in automotive research and product development To provide undergraduate students the opportunity to become directly involved in comprehensive research projects MnCAR EMISSION LAB:  MnCAR EMISSION LAB MID RANGE ETHANOL STUDY :  MID RANGE ETHANOL STUDY Conducted During 1998 and 1999 Evaluate the Effects of 30% Ethanol and 70% Gasoline Blend on Unmodified Vehicles 1 Year Study Focusing on: Driveability Material Compatibility / Durability Fuel Economy Emissions E30 VEHICLE POPULATION:  E30 VEHICLE POPULATION 1985 OLDSMOBILE CUTLASS CIERA 2.5L 1985 FORD ECONOLINE 150 4.9L 1990 CHEVROLET C1500 4.3L 1990 DODGE CARAVAN 3.3L 1991 CADILLAC SEDAN DEVILLE 4.9L 1992 FORD TAURUS 3.8L 1992 CHEVROLET K1500 5.7L 1992 GEO METRO 1.0L MANUAL 1994 BUICK REGAL 3.1L 1996 OLDSMOBILE ACHIEVA 3.1L 1997 CHEVROLET K3500 7.4L 1997 CHEVROLET K1500 5.7L 1997 FORD F-150 5.4L 1998 FORD F-250 5.4L 1998 DODGE CARAVAN 3.3L DRIVEABILITY RESULTS and OBSERVATIONS:  DRIVEABILITY RESULTS and OBSERVATIONS Ambient Temperature Ranged from 0o F to 90o F Standardized Form Used to Record Any Abnormal Characteristics No Reports Of: Cold Starting or Hard Starting Problems Vapor Lock Hesitation MATERIAL COMPATABILITY:  MATERIAL COMPATABILITY Evaluated Through Use of Maintenance Log and Oil Analysis Testing Results No Fuel System Component Failures Oil Analysis Results Showed No Metal Particles Representing Accelerated Component Wear and No Indication Of Increased Oil Degradation Critical Area Needing Further Study VOLUMETRIC FUEL ECONOMY:  VOLUMETRIC FUEL ECONOMY Overall Fleet Average Fuel Economy Decreased 9.8% Volumetric Fuel Economy is Directly Related to the Energy Content of the Fuel. There is Approximately 9.5% Less Energy in a Gallon of E30 Than Gasoline Some Vehicles are More Sensitive Than Others PROJECTED E20 FUEL ECONOMY:  PROJECTED E20 FUEL ECONOMY E20 Blend has Approximately 3.3% Less Energy Than Current E10 Blend Expect a Slight Decrease in MPG Fuel Economy (1%-3% from current E10 blend) However, the Reduction Is Not Necessarily the Same Magnitude as the Energy Density Difference EMISSION CHARACTERISTICS:  EMISSION CHARACTERISTICS No Significant Trends Identified Pointing to Increased Levels of HC, CO and NOx Some Vehicles Demonstrated Slightly Higher Levels While Some Lower All Emission Results Were Low SUMMARY OF INCREASED ETHANOL CONTENT:  SUMMARY OF INCREASED ETHANOL CONTENT ENGINE CALIBRATION – Will Engines Run Properly? Unmodified Vehicles (Closed-Loop Fuel Injection) Have Run on Blends Up To 50/50 Blends Without Problems. Material Compatibility / Vehicle Warranty Significant Issue for Manufacturers Area Requiring Additional Research WHY DO ENGINES RUN PROPERLY?:  WHY DO ENGINES RUN PROPERLY? Closed-Loop Fuel Injection Automatically Adjusts Air/Fuel Mixture Optimum Performance Low Emissions Oxygen Sensor (O2) Key Component Measures Excess Oxygen in Exhaust CLOSED-LOOP SYSTEM OPERATION:  CLOSED-LOOP SYSTEM OPERATION As Ethanol Content Increases: Excess Oxygen in Exhaust O2 Sensor “Tells” the Computer A/F is Lean Computer Increases Fuel Flow Adjusts Mixture Continually E20 RESEARCH PROJECT:  E20 RESEARCH PROJECT Minnesota Corn Research and Promotion Council Supported Research Project Test Vehicle - 1998 Chevrolet Malibu Will be Used For All Emissions and Fuel Economy Testing Other Manufacturers Components will be Evaluated Comparison of E20 Blended Gasoline Vs: Non-Oxygenated Gasoline E10 E20 CRITICAL FUEL SYSTEM COMPONENTS:  CRITICAL FUEL SYSTEM COMPONENTS E20 RESEARCH PROJECT:  E20 RESEARCH PROJECT Evaluate the Effects of E20 Blended Fuel On: Emissions Using EPA Testing Protocol Fuel Economy Laboratory Evaluation in Research Lab On-Road Fuel Economy Material Compatibility Focus on a Variety of Manufacturers Investigation of Materials Used in Current Fuel Systems Laboratory Testing of Selected Components Driveability Issues Fuel Characteristics Volatility QUESTIONS:  QUESTIONS ????????????????????????????????????????????????????????????????????????????????????????????????????????????

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