Combustion of Biodiesel- and Ethanol-Diesel Intake Injection Mixtures with United States Naval Academy

Format:

Conference/Event

Author/Creator:

Leahey, D. M., author.

Conference Name:

Powertrain & Fluid Systems Conference and Exhibition (2007-10-29 : Chicago, Illinois, United States)

SAE 2007 Commercial Vehicle Engineering Congress & Exhibition (2007-10-30 : Rosemont, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

Seven biofuel-diesel fuel configurations were tested in a single-cylinder research diesel CFR engine that allowed variable injection timing. These seven configurations included three biodiesel-diesel blends (20% and 100%); two ethanol-diesel blends (15% and 20%), and two cases in which ethanol was injected into the intake air flow (20% and 33%). Combustion characteristics, NOx emissions, and soot emissions were compared with diesel operation across a range of injection timings. The effect of fuel compressibility affected the timing of injection, with biodiesel-diesel blends having advanced injection and ethanol-diesel blends having delayed injection. Biodiesel-diesel blends showed reduced ignition delay with only modest changes in combustion duration, while ethanol-diesel mixtures showed longer ignition delay but much shorter combustion duration and earlier phasing. In general, all the biofuel-diesel configurations improved thermal efficiency (3% relative) but increased fuel consumption to a greater extent due to lower energy content. None of the seven configurations had a large effect on NOx emissions. Soot was slightly lower for both biodiesel-diesel and blended ethanol-diesel. However, premixing ethanol with intake air using a port-fuel injector lowered soot by approximately 50%

Notes:

Vendor supplied data

Publisher Number:

2007-01-4011

Access Restriction:

Restricted for use by site license