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Original Articles

Evaluation of Hydroperoxide Concentrations During the Delay of Autoignition in an Experimental Four Stroke Engine: Comparison with Cool Flame Studies in a Flow System

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Pages 117-124 | Received 09 Oct 1987, Accepted 11 Apr 1988, Published online: 27 Apr 2007
 

Abstract

Organic peroxides were extracted in a flow system, from the combustion chamber of a motored C.F.R. engine operated as a compressor and running on n-heptane.

The concentration of the only organic peroxide found before self ignition was estimated to be 6 x 1015 molecules cm−3.

The decomposition rate was equal to 1018 molecules cm−3S−1. This value is the same as the rate of decomposition of organic peroxides found in the region before a stabilized cool flame of n-heptane in a flow reactor: these results illustrate the importance of low temperature oxidation during the delay of autoignition in spark ignition engines.

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