Clarification of OH Radical Emission Intensity During Autoignition in a 2-Stroke Spark Ignition Engine

Paper #:
  • 982481

Published:
  • 1998-10-19
Citation:
Shoji, H., Amino, Y., Hashimoto, S., Yoshida, K. et al., "Clarification of OH Radical Emission Intensity During Autoignition in a 2-Stroke Spark Ignition Engine," SAE Technical Paper 982481, 1998, https://doi.org/10.4271/982481.
Pages:
11
Abstract:
This research focused on the light emission behavior of the OH radical (characteristic spectrum of 306.4 nm) that plays a key role in combustion reactions, in order to investigate the influence of the residual gas on autoignition. The test engine used was a 2-stroke, air-cooled engine fitted with an exhaust pressure control valve in the exhaust manifold. When a certain level of internal EGR is forcibly applied, the temperature of the unburned end gas is raised on account of heat transfer from the hot residual gas and also due to compression by piston motion. As a result, the unburned end gas becomes active and autoignition tends to occur.
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