A Study of Alcohol Blended Fuels in an Unthrottled Single Cylinder Spark Ignition Engine Mahle Powertrain Limited

Format:

Conference/Event

Author/Creator:

Cairns, Cairns, author.

Contributor:

Aleiferis, Pavlos

Fraser, Neil

Malcolm, John

Todd, Alan

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

This work involved study of the effects of alcohol blends on combustion, fuel economy and emissions in a single cylinder research engine equipped with a mechanical fully variable valvetrain on the inlet and variable valve timing on the exhaust. A number of splash blends of gasoline, iso-octane, ethanol and butanol were examined during port fuel injected early inlet valve closing operation, both with and without variable valve timing. Under low valve overlap conditions, it was apparent that the inlet valve durations/lifts required for full unthrottled operation were remarkably similar for the wide range of blends studied. However, with high valve overlap differences in burning velocities and internal EGR tolerances warranted changes in these valve settings. In turn, it was concluded that high ethanol content blends facilitated minimum throttling at the inlet valve itself and the largest relative savings in terms of fuel consumption, engine-out emissions of NOx and (corrected) unburned hydrocarbons

Notes:

Vendor supplied data

Publisher Number:

2010-01-0618

Access Restriction:

Restricted for use by site license