Determination of Engine Cylinder Pressures from Crankshaft Speed Fluctuations National Research Council of Canada

Format:

Conference/Event

Author/Creator:

Brown, Terrence S., author.

Conference Name:

International Congress & Exposition (1992-02-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1992

Summary:

An experimental test of a non-contact method for determining simultaneously the pressure in each cylinder of a reciprocating engine is reported. The method exploits a pattern recognition technique to compare crankshaft speed fluctuations to reference patterns in a knowledge base. The crankshaft speed is measured by timing the passage of gear teeth on the engine's flywheel.The experiment was carried out on a Detroit Diesel Corporation 6V-92TA engine. The baseline operating condition was 75 percent rated load at 1200 rpm. The engine's six cylinders were individually under-fuelled from the baseline operating condition to achieve peak pressure reductions of 5 to 20 percent. The required reference angular velocity waveforms were obtained by measuring the effect of under-fuelling individual cylinders to reduce their peak pressures by 10 percent.The experimental results show that the method evaluates the cylinder pressures with an RMS error of less than 6 percent. With further work. it is expected that a practical diagnostic tool could be developed for accurately determining cylinder pressures in diesel engines

Notes:

Vendor supplied data

Publisher Number:

920463

Access Restriction:

Restricted for use by site license