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Methanol/ethanol/gasoline blend fuels demonstration with stratified charge engine vehicles : final report. Seminario Administración de la Información Científica y Tecnológica.



Four 1978 Honda CVCC vehicles have been in regular use by California Energy Commission staff in Sacramento for 12 months.Three of the unmodified vehicles were fueled with alcohol/gasoline blends (5 percent methanol, 10 percent methanol, and 10 percent ethanol) with the fourth remaining on gasoline as a control. The operators did not know which fuels were in the vehicles. At 90-day intervals the cars were returned to the University of Santa Clara for servicing and for emissions and fuel economy testing in accordance with the Federal Test Procedures. The demostration and testing have established the following: (1) the tested blends cause no significant degradation in exhaust emissions, fuel economy, and drive ability; (2) the tested blends cause significant increases in evaporative emissions (3) analysis of periodic oil samples shows no evidence of accelerated metal wear; and (4) higher than 10. OPERATION PROTOCOL. alcohols will require substantial modification to most existing California motor vehicles for acceptable emissions, performance, and fuel economy. In addition, the report discusses many aspects of using methanol and ethanol fuels, both straight and in blends, in various engine technologies. Recommendations include: (1) a study of the feasibility of storing large quantities of methanol and ethanol for blending with gasoline to mitigate any future short-term gasoline shortage emergency: (2) straight alcohol fuel development for captive fleet operation with new vehicles selected to represent future vechicle technology and modified to optimize emissions, chamber testing to characterize the contribution of both straight alcohol and blend fuel exhaust and evaporative emissions to photochemical smog and particulate aerosol production. Vehicle procurement. Test and evaluation procedures. Fueling and oil sampling. Vehicle driveability. Photochemical reactivity and evaporative. Emissions tests. Presentation of results-data. Fuel economy. Exhaust emissions. Driveability. Evaporative emissions. Photochemical reactibity comparisions of exhaust. Engine wear. INTERPRETATION OF RESULTS. Fuel economy. Exhaust emissions. Driveability. Evaporative emissions. Photochemical effects of exhaust and evaporative emissions. Engine wear. DISCUSSION OF ALCOHOL FUEL USES. Adaptability. Performance. Emissions. Overall considerations-fuel cycles, efficiency, economics and environmental effects. Use of methanol/gasoline blends in various engines. Health and safety. APPENDIX A: Sample calculation of hydrocarbon division for fuel blend. APPENDIX B: Fueling contracts and forms.

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Ministerio de Ambiente y Energía. Secretaría de Planificación del Sub-Sector Energía - Centro de Información de Energía y Ambiente, CIENA

Grettel Ruiz Matarrita

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