Understanding the Thermodynamics of Direct Injection Spark Ignition (DISI) Combustion Systems: An Analytical and Experimental Investigation Ford Motor Company

Format:

Conference/Event

Author/Creator:

Anderson, W., author.

Conference Name:

1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition (1996-10-14 : San Antonio, Texas, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1996

Summary:

Direct-injection spark-ignition (DISI) engines have been investigated for many years but only recently have shown promise as a next generation gasoline engine technology. Much of this new enthusiasm is due to advances in the fuel injection system, which is now capable of producing a well-controlled spray with small droplets. A physical understanding of new combustion systems utilizing this technology is just beginning to occur. This analytical and experimental investigation with a research single-cylinder combustion system shows the benefits of in-cylinder gasoline injection versus injection of fuel into the intake portrait Charge cooling with direct injection is shown to improve volumetric efficiency and reduce the mixture temperature at the time of ignition allowing operation with a higher compression ratio which improves the thermodynamic cycle efficiency. Volumetric efficiency improved by 2-3%, wide-open-throttle (WOT) output improved by 5-10% and part-load fuel consumption improved by 4-5% versus a production PI engine with stoichiometric calibration. A further gain of 6-7% was recorded with lean, homogeneous air-fuel operation

Notes:

Vendor supplied data

Publisher Number:

962018

Access Restriction:

Restricted for use by site license