Testing and Evaluation of Ignition Improvers for Ethanol in a DI Diesel Engine

952512

10/01/1995

Event
1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
The ignition delay of ethanol with different nitrate and polyethylene glycol based ignition improvers was investigated in a single-cylinder DI Diesel engine. The nitrate-based improvers provided a shorter ignition delay than the polyethylene glycol improvers, but the results indicate that the efficiency of the polyethylene glycol improvers increases with the length of the molecular chains. Comparison with reference fuels gives a cetane number of approximately 44 for ethanol with 4% of the best nitrate-based improver versus 40 for ethanol with 7% polyethylene glycol improver. It is shown, that the random ignition delay for all the fuels has a normal distribution, and that the reference fuel of every measurement series has a constant expected ignition delay.
Ignition delay measurements in a constant-volume combustion vessel failed to produce the same trends as in the engine for the ethanol fuels.
Meta TagsDetails
DOI
https://doi.org/10.4271/952512
Pages
14
Citation
Simonsen, H., and Chomiak, J., "Testing and Evaluation of Ignition Improvers for Ethanol in a DI Diesel Engine," SAE Technical Paper 952512, 1995, https://doi.org/10.4271/952512.
Additional Details
Publisher
Published
Oct 1, 1995
Product Code
952512
Content Type
Technical Paper
Language
English