Effects of Combustion Chamber Geometry on Diesel Combustion Dept. of Mechanical Engineering Waseda University

Format:

Conference/Event

Author/Creator:

Saito, Takeshi, author.

Conference Name:

1986 SAE International Off-Highway and Powerplant Congress and Exposition (1986-09-08 : Milwaukee, Wisconsin, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1986

Summary:

A study has been made of an automotive direct-injection diesel engine in order to identify the effects of the combustion chamber geometry on combustion, with special emphasis focused on a re-entrant combustion chamber.Conventional combustion chambers and a re-entrant one were compared in terms of the combustion process, engine performance and NOx and smoke emissions. Heat transfer calculations and heat release analyses show that the re-entrant chamber tends to reduce ignition lag due to the higher temperatures of the wall on which injected fuel impinges.Analyses of turbulent flow characteristics in each chamber indicate that the re-entrant chamber enhances combustion because of the higher in-cylinder velocity accompanied by increased turbulence. Further, analyses of in-cylinder gas samples show lower soot levels in the re-entrant chamber. As a result, a good compromise can be achieved between fuel economy and exhaust emissions by retarding the fuel injection timing

Notes:

Vendor supplied data

Publisher Number:

861186

Access Restriction:

Restricted for use by site license