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|Title: ||Dilution effects on the controlled auto-ignition (CAI) combustion of hydrocarbon and alcohol fuels|
|Authors: ||Oakley, A|
|Publication Date: ||2001|
|Publisher: ||SAE International|
|Citation: ||SAE International Fall Fuels and Lubricants Meeting and Exhibition|
|Series/Report no.: ||2001-01-3606|
|Abstract: ||This paper presents results from an experimental programme researching the in-cylinder conditions necessary to obtain homogenous CAI (or HCCI) combustion in a 4-stroke engine. The fuels under investigation include three blends of Unleaded Gasoline, a 95 RON Primary Reference Fuel, Methanol, and Ethanol. This work concentrates on establishing the CAI operating range with regard to Air/Fuel ratio and Exhaust Gas Re-circulation and their effect on the ignition timing, combustion rate and variability, Indicated thermal efficiency, and engine-out emissions such as NOx. Detailed maps are presented, defining how each of the measured variables changes over the entire CAI region.
Results indicate that the alcohols have significantly higher tolerance to dilution than the hydrocarbon fuels tested. Also, variations in Gasoline blend have little effect on any of the combustion parameters measured.|
|Description: ||Copyright © 2001 SAE International. This paper is posted on this site with permission from SAE International. Further use of this paper is not permitted without permission from SAE|
|Appears in Collections:||School of Engineering and Design Research papers|
Mechanical and Aerospace Engineering
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