Fluid Flow, Combustion and Efficiency with Early or Late Inlet Valve Closing Lund Institute of Technology

Format:

Conference/Event

Author/Creator:

Söderberg, Fredrik, author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1997-10-13 : Tulsa, Oklahoma, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1997

Summary:

This paper is a study of the effects of valve timing and how it influences the in-cylinder fluid flow, the combustion, and the efficiency of the engine. An engine load of 4.0 bar imepnet was achieved by setting the inlet valve closing time early or late to enable unthrottled operation. Inlet valve deactivation was also used and asymmetrical valve timing, id est valve timing with the two inlet valves opening and closing at different times. The valve timing was altered by switching cam lobes between the experiments.The results indicate a longer flame development period but a faster combustion with early inlet valve closing compared to the throttled case. For late inlet valve closing, a variation in the combustion duration results. As expected, the pumping mean effective pressure (PMEP) was greatly reduced with early and late inlet valve closing compared to the throttled case

Notes:

Vendor supplied data

Publisher Number:

972937

Access Restriction:

Restricted for use by site license