UV Absorbance Histories and Knock in a Spark Ignited Engine 690519
Monochromatic ultraviolet (UV) absorbance, temperature, and pressure histories of unburned gas in a single cylinder CFR engine under motored, fired, and autoignition conditions were recorded on a multichannel magnetic tape recorder. Isooctane, cyclohexane, ethane, n-hexane, n-heptane, 75 octane number (ON), 50 ON, and 25 ON blends of primary reference fuels (PRF) were studied. Under knocking or autoignition conditions a critical absorbance at 2600 A was found, whose magnitude was independent of engine operating variables and dependent only on the knock resistance of the fuel. This absorbance increased rapidly when a certain temperature level was exceeded during the exothermic preflame reactions.
Citation: Quader, A., Myers, P., and Uyehara, O., "UV Absorbance Histories and Knock in a Spark Ignited Engine," SAE Technical Paper 690519, 1969, https://doi.org/10.4271/690519. Download Citation
Author(s):
Ather A. Quader, Phillip S. Myers, Otto A. Uyehara
Affiliated:
University of Wisconsin
Pages: 16
Event:
Mid-Year Meeting
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Knock
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