A method for detection of ethanol content in fuel for an engine equipped with direct injection (DI) is presented. The methodology is based on in-cylinder pressure measurements during the compression stroke and exploits the different charge cooling properties of ethanol and gasoline. The concept was validated using dynamometer data of a 2.0L DI turbocharged engine with variable valve timing (VVT). An algorithm was developed to process the experimental data and generate a residue from the complex cycle-to-cycle in-cylinder pressure evolution which captures the charge cooling effect. The experimental results show that there is a monotonic correlation between the residues and the fuel ethanol percentage in the majority of the cases. However, the correlation varies for different engine operating parameters; such as, speed, load, valve timing, fuel rail pressure, intake and exhaust temperature and pressure.
Ethanol Detection in Flex-Fuel Direct Injection Engines Using In-Cylinder Pressure Measurements
Sae Int. J. Fuels Lubr
Sae International Journal of Fuels and Lubricants
SAE World Congress & Exhibition ; 2009
Sae International Journal of Fuels and Lubricants ; 2 , 1 ; 229-241
2009-04-20
13 pages
Conference paper
English
Ethanol detection in flex-fuel direct injection engines using in-cylinder pressure measurements
Automotive engineering | 2009
|SAE Technical Papers | 2010
|Automotive engineering | 2010
|Water injection enabling high efficiency flex fuel engines development
SAE Technical Papers | 2022
|Deposit Formation of Flex Fuel Engines Operated on Ethanol and Gasoline Blends
SAE Technical Papers | 2010
|