In-Cylinder Fuel Blending of Gasoline/Diesel for Improved Efficiency and Lowest Possible Emissions on a Multi-Cylinder Light-Duty Diesel Engine

2010-01-2206

10/25/2010

Event
SAE 2010 Powertrains Fuels & Lubricants Meeting
Authors Abstract
Content
In-cylinder fuel blending of gasoline with diesel fuel is investigated on a multi-cylinder light-duty diesel engine as a strategy to control in-cylinder fuel reactivity for improved efficiency and lowest possible emissions. This approach was developed and demonstrated at the University of Wisconsin through modeling and single-cylinder engine experiments. The objective of this study is to better understand the potential and challenges of this method on a multi-cylinder engine. More specifically, the effect of cylinder-to-cylinder imbalances and in-cylinder charge motion as well as the potential limitations imposed by real-world turbo-machinery were investigated on a 1.9-liter four-cylinder engine. This investigation focused on one engine condition, 2300 rpm, 5.5 bar net mean effective pressure (NMEP). Gasoline was introduced with a port-fuel-injection system. Parameter sweeps included gasoline-to-diesel fuel ratio, intake charge mixture temperature, in-cylinder swirl level, and diesel start-of-injection timing. In addition, engine parameters were trimmed for each cylinder to balance the combustion process for maximum efficiency and lowest emissions. An important observation was the strong influence of intake charge temperature on cylinder pressure rise rate. Experiments were able to show increased thermal efficiency along with greater than 90% decreases in oxides of nitrogen (NOX) and particulate matter (PM). However, indicated thermal efficiency for the multi-cylinder experiments were less than expected based on modeling and single-cylinder results. The lower indicated thermal efficiency as compared to the model predictions suggests a need for improved cylinder-to-cylinder control and further optimization within dual-fuel operation.
Meta TagsDetails
DOI
https://doi.org/10.4271/2010-01-2206
Pages
13
Citation
Curran, S., Prikhodko, V., Cho, K., Sluder, C. et al., "In-Cylinder Fuel Blending of Gasoline/Diesel for Improved Efficiency and Lowest Possible Emissions on a Multi-Cylinder Light-Duty Diesel Engine," SAE Technical Paper 2010-01-2206, 2010, https://doi.org/10.4271/2010-01-2206.
Additional Details
Publisher
Published
Oct 25, 2010
Product Code
2010-01-2206
Content Type
Technical Paper
Language
English