1995-10-01

Testing and Evaluation of Ignition Improvers for Ethanol in a DI Diesel Engine 952512

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Investigation of Effects of Ignition Improvers on Ignition Delay Time of Ethanol Combustion with Rapid Compression and Expansion Machine

2012-01-0854

View Details

TECHNICAL PAPER

Effects of Ethanol in Ester-Ethanol-Diesel Blended Fuels on Spray Behavior and PM Emission

2006-01-0236

View Details

TECHNICAL PAPER

Experimental Investigations on the Combustion of Ethanol in a Low Heat Rejection Engine Using Different Methods

930931

View Details

X