The Autoignition of Isobutane in a Knocking Spark Ignition Engine

870169

02/01/1987

Event
SAE International Congress and Exposition
Authors Abstract
Content
The chemical aspects of the autoignition of isobutane are studied experimentally in a spark ignition engine and theoretically using computer simulations with a detailed chemical kinetic mechanism. The results of these studies show that even with the relatively knock-resistant fuel, isobutane, there is still a significant amount of fuel breakdown in the end gas with a resulting heat release and temperature increase. The ability of the detailed kinetic model to predict this low temperature chemical activity is assessed and the model is modified to simulate more closely the experimental observations. We address the basic question of whether this first stage of combustion accounts for a chemical preconditioning of the end gas that leads to the autoignition; or whether it merely provides sufficient heat release in the end gas that high temperature autoignition is initiated.
Meta TagsDetails
DOI
https://doi.org/10.4271/870169
Pages
22
Citation
Green, R., Parker, C., Pitz, W., and Westbrook, C., "The Autoignition of Isobutane in a Knocking Spark Ignition Engine," SAE Technical Paper 870169, 1987, https://doi.org/10.4271/870169.
Additional Details
Publisher
Published
Feb 1, 1987
Product Code
870169
Content Type
Technical Paper
Language
English