Residual Gas Measurements in a Utility Engine Engine Research Center, University of Wisconsin-Madison

Format:

Conference/Event

Author/Creator:

Albert, B. P., author.

Conference Name:

Small Engine Technology Conference & Exposition (2004-09-27 : Graz, Austria)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

The residual gas fraction was measured in an air-cooled single-cylinder utility engine by directly sampling the trapped cylinder charge during a programmed misfire. Tests were performed for a range of fuel mixture preparation systems, cam timings, ignition timings, engine speeds and engine loads. The residual fraction was found to be relatively insensitive to the fuel mixture preparation system, but was, to a moderate degree, sensitive to the ignition timing. The residual fraction was found to be strongly affected by the amount of valve overlap and engine speed. The effects of engine speed and ignition timing were, in part, due to the in-cylinder conditions at EVO, with lower temperatures favoring higher residual fractions. The data were compared to existing literature models, all of which were found to be lacking. The effect of the threshold value used to define lift was investigated, and a modified form of the Yun and Mirsky correlation, which was relatively insensitive to lift threshold, was proposed

Notes:

Vendor supplied data

Publisher Number:

2004-32-0029

Access Restriction:

Restricted for use by site license