Effects of Cetane Number, Cetane Improver, Aromatics, and Oxygenates on 1994 Heavy-Duty Diesel Engine Emissions Southwest Research Institute

Format:

Conference/Event

Author/Creator:

Ullman, Terry L., author.

Conference Name:

International Congress & Exposition (1994-02-28 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1994

Summary:

Several studies have investigated the effects of diesel fuel properties on heavy-duty engine emissions. The objective of this CRC-sponsored test program was to determine the effects of oxygenated diesel fuel, and to further investigate the effects of cetane number and aromatic content on emissions from a heavy-duty engine set to obtain transient NOx emissions below 5 and then 4 g/hp-hours A fuel set was developed with controlled variations in cetane number, aromatics, and oxygen to superette their effects on emissions. Ignition improver was used to increase cetane number of several fuels. Oxygenated diesel fuel was achieved by adding a "glyme" compound to selected fuels to obtain 2 and 4 mass percent oxygen concentrations.With these fuels, emissions were measured over the EPA transient FTP using a prototype 1994 DDC Series 60 tuned for 5 and then 4 g/hp-hr NOx. No exhaust aftertreatment device was used on this engine. To estimate the fuel property effects, regression models for the emissions data were constructed. Results indicated that increasing cetane number reduced CO and NOx emissions. Reducing aromatic content lowered NOx. Oxygen in the fuel reduced CO and particulate emissions, but tended to slightly increase NOx emissions

Notes:

Vendor supplied data

Publisher Number:

941020

Access Restriction:

Restricted for use by site license