منابع مشابه
Engine Cleanliness in E85 Powered Flex-fuel Vehicles
E85 is viewed as a potential alternative fuel to decrease fossil CO2 emissions and dependence on crude oil. As for their conventional counterparts, engines powering flex-fuel vehicles deliver optimal performance when the sensitive areas in the intake system are kept clean and free of deposits. Since no standard tests are available for evaluating the tendency of fuels to form intake valve deposi...
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Renewable energy sources are becoming more important as the world’s supply of fossil fuels decrease and also due to environmental concerns. Since 2003, when the ethanol-gasoline flex fuel car became commercially available in Brazil, the growth of this market has been significant, to the point where currently 40% of the fuel consumption in Brazil is from renewable biofuels. This has been made po...
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Flexible fuel vehicles (FFVs) are able to operate on a blend of ethanol and gasoline in any volumetric concentration of up to 85% ethanol (93% in Brazil). The estimation of ethanol content is crucial for optimized and robust performance in such vehicles. Even if an ethanol sensor is utilized, an estimation scheme independent of the ethanol sensor measurement retains advantages in enhancing the ...
متن کاملEthanol Detection in Flex-Fuel Direct Injection Engines Using In-Cylinder Pressure Measurements
Flexible fuel vehicles (FFVs) are able to operate on a blend of ethanol and gasoline in any volumetric concentration of up to 85% ethanol (93% in Brazil). The estimation of ethanol content is crucial for optimized and robust performance in such vehicles. Even if an ethanol sensor is utilized, an estimation scheme independent of the ethanol sensor measurement retains advantages in enhancing the ...
متن کاملTolerant Ethanol Estimation in Flex-fuel Vehicles during Maf Sensor Drifts
Flexible fuel vehicles (FFVs) can operate on a blend of ethanol and gasoline in any volumetric concentration of up to 85% ethanol (93% in Brazil). Existing FFVs rely on ethanol sensor installed in the vehicle fueling system, or on the ethanoldependent air-to-fuel ratio (AFR) estimated via an exhaust gas oxygen (EGO) or λ sensor. The EGO-based ethanol detection is desirable from cost and mainten...
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ژورنال
عنوان ژورنال: Science
سال: 2009
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.325_1321a