Browse Publications Technical Papers 2009-01-1957
2009-06-15

Mixture Formation Process in a Spark-Ignition Engine with Ethanol Blended Gasoline 2009-01-1957

In this study, fuel concentration measurements in a spark-ignition (SI) engine with ethanol blended gasoline were carried out using an optical sensor installed in the spark plug with laser infrared absorption technique. The spark plug sensor for in-situ fuel concentration measurement was applied to a port injected SI engine. The molar absorption coefficients of ethanol blended gasoline were determined for various pressures and temperatures in advance using a constant volume vessel with electric heating system. Ethanol blended gasoline with high volumetric ratios shows lower molar absorption coefficients due to lower molar absorption coefficients of ethanol. The molar absorption coefficients of ethanol blended gasoline can be estimated by considering the molar fraction of each component. Mixture formation processes of ethanol blended gasoline were investigated using spark-plug sensor installed in a spark plug in a port-injected SI engine with changing the fuel injection timing in an intake port. Delaying injection of ethanol blended gasoline caused a leaner fuel concentration around the spark plug and cycle-to-cycle fluctuation of combustion.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Potentialities of Direct Injection in Spark Ignition Engines - from Gasoline to Ethanol

2000-01-3270

View Details

TECHNICAL PAPER

Volumetric Efficiency Investigation with Anhydrous and Hydrous Ethanol on a Port Fuel Injection Spark Ignition Engine

2016-36-0422

View Details

JOURNAL ARTICLE

Blending Octane Number of Ethanol in HCCI, SI and CI Combustion Modes

2016-01-2298

View Details

X