Liquid Gasoline Behavior in the Engine Cylinder of a SI Engine Massachusetts Institute of Technology

Format:

Book

Conference/Event

Author/Creator:

Shin, Younggy, author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1994-10-17 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 1994

Summary:

The liquid fuel entry into the cylinder and its subsequent behavior through the combustion cycle were observed by a high speed CCD camera in a transparent engine. The videos were taken with the engine firing under cold conditions in a simulated start-up process, at 1,000 RPM and intake manifold pressure of 0.5 bar. The variables examined were the injector geometry, injector type (normal and air-assisted), injection timing (open- and closed-valve injection), and injected air-to-fuel ratios.The visualization results show several important and unexpected features of the in-cylinder fuel behavior: 1) strip-atomization of the fuel film by the intake flow; 2) squeezing of fuel film between the intake valve and valve seat at valve closing to form large droplets; 3)deposition of liquid fuel as films distributed on the intake valve and head region. Some of the liquid fuel survives combustion into the next cycle. The time evolution of the in-cylinder liquid film is influenced by the injection geometry, injection timing, injected air-to-fuel ratio, and port surface temperature. Photographs showing the liquid fuel features and an explanation of the observed phenomena are given in the paper

Notes:

Vendor supplied data

Publisher Number:

941872

Access Restriction:

Restricted for use by site license