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Effect of Combustion-chamber Shape on the Performance of a Prechamber Compression-ignition EngineThe effect on engine performance of variations in the shape of the prechamber, the shape and direction of the connecting passage, the chamber volume using a tangential passage, the injection system, and the direction od the fuel spray in the chamber was investigated using a 5 by 7 inch single-cylinder compression-ignition engine. The results show that the performance of this engine can be considerably improved by selecting the best combination of variables and incorporating them in a single design. The best combination as determined from these tests consisted of a disk-shaped chamber connected to the cylinder by means of a flared tangential passage. The fuel was injected through a single-orifice nozzle directed normal to the air swirl and in the same plane. At an engine speed of 1,500 r.p.m. and with the theoretical fuel quantity for no excess air, the engine developed a brake mean effective pressure of 115 pounds per square inch with a fuel consumption of 0.49 pound per brake horsepower-hour and an explosion pressure of 820 pounds per square inch. A brake mean effective pressure of 100 pounds per square inch with a brake-fuel consumption of 0.44 pound per horsepower-hour at 1,500 r.p.m. was obtained.
Document ID
19930081323
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Moore, C S
Collins, J H , Jr
Date Acquired
September 6, 2013
Publication Date
December 1, 1934
Report/Patent Number
NACA-TN-514
Accession Number
93R10613
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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