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Performance of a Compression-ignition Engine with a Precombustion Chamber Having High-Velocity Air FlowPresented here are the results of performance tests made with a single-cylinder, four stroke cycle, compression-ignition engine. These tests were made on a precombustion chamber type of cylinder head designed to have air velocity and tangential air flow in both the chamber and cylinder. The performance was investigated for variable load and engine speed, type of fuel spray, valve opening pressure, injection period and, for the spherical chamber, position of the injection spray relative to the air flow. The pressure variations between the pear-shaped precombustion chamber and the cylinder for motoring and full load conditions were determined with a Farnboro electric indicator. The combustion chamber designs tested gave good mixing of a single compact fuel spray with the air, but did not control the ensuing combustion sufficiently. Relative to each other, the velocity of air flow was too high, the spray dispersion by injection too great, and the metering effect of the cylinder head passage insufficient. The correct relation of these factors is of the utmost importance for engine performance.
Document ID
19930081148
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Spanogle, J A
Moore, C S
Date Acquired
September 6, 2013
Publication Date
October 1, 1931
Report/Patent Number
NACA-TN-396
Accession Number
93R10438
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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