Browse Publications Technical Papers 2007-01-1408
2007-04-16

Ethanol Direct Injection on Turbocharged SI Engines - Potential and Challenges 2007-01-1408

In the past application of alternative fuels was mostly concentrated to special markets - e.g. for ethanol and ethanol blends Brazil or Sweden. Now an increasing sensitivity towards dependency on crude oil significantly enhances the interest in alternative fuels. With spark ignited engines, ethanol and gasoline / ethanol blends are the most promising alternative fuels - besides CNG. The high octane number of ethanol and the resulting excellent knock performance gives significant benefits, especially with highly boosted engines.
However, the evaporation characteristics of ethanol result in challenges regarding cold start and oil dilution with GDI application.
This paper deals with investigations on a turbocharged DI engine operated on ethanol fuel in order to improve challenges of ethanol fuel, such as oil dilution and cold start.
Cold start can be improved by injecting fuel late in the compression stroke (high pressure start) based on a refined engine design and operation strategies.
Oil dilution has to be deeply investigated on a transparent engine in order to optimize charge motion, spray pattern and penetration.
The paper describes the systematic approach of optimizing a DI /TCI spark ignition engine for ethanol fuel with respect to cold start potential and avoiding oil dilution especially during high load operation.

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

The Effect of Ethanol Fuel on a Spark Ignition Engine

2006-01-3380

View Details

TECHNICAL PAPER

High Concentration Ethanol Effect on SI Engine Cold Startability

2007-01-2036

View Details

TECHNICAL PAPER

An Experimental and Modeling Investigation into the Comparative Knock and Performance Characteristics of E85, Gasohol [E10] and Regular Unleaded Gasoline [87 (R+M)/2]

2007-01-0473

View Details

X