Researches on Preliminary Chemical Reactions in Spark-Ignition Engines PDF Download

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Researches on Preliminary Chemical Reactions in Spark-Ignition Engines

Researches on Preliminary Chemical Reactions in Spark-Ignition Engines PDF Author: E. Muehlner
Publisher: BiblioGov
ISBN: 9781289263515
Category :
Languages : en
Pages : 60

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Book Description
Chemical reactions can demonstrably occur in a fuel-air mixture compressed in the working cylinder of an Otto-cycle (spark ignition) internal-combustion engine even before the charge is ignited by the flame proceeding from the sparking plug. These are the so-called "prelinminary reactions" ("pre-flame" combustion or oxidation), and an exact knowledge of their characteristic development is of great importance for a correct appreciation of the phenomena of engine-knock (detonation), and consequently for its avoidance. Such reactions can be studied either in a working engine cylinder or in a combustion bomb. The first method necessitates a complicated experimental technique, while the second has the disadvantage of enabling only a single reaction to be studied at one time. Consequently, a new series of experiments was inaugurated, conducted in a motored (externally-driven) experimental engine of mixture-compression type, without ignition, the resulting preliminary reactions being detectable and measurable thermometrically.