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Title: Autoignition of n-butane/isobutane blends in a knock research engine

Autoignition of n-butane/isobutane blends in a knock research engine This paper describes experiments conducted using a single cylinder, spark ignition research engine to examine the effect of the branched chain alkane isobutane (RON 102) on the autoignition chemistry of straight chain n-butane (RON 94). Isobutane was added in increasing quantities. Measurement of cylinder pressure and the analysis of end gas species were used as diagnostics to determine the knock point and ascertain the end gas reactivity. Examination of the chemical species in the end gas suggests that low temperature chemical reactions are occurring; and increasing the amounts of isobutane in the fuel mixture leads to higher yields of propene and chain terminating methyl radicals.
Authors: ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 5509255
Report Number(s):CONF-890240--
Resource Type:Conference
Resource Relation:Conference: Society of Automotive Engineers international congress and exposition, Detroit, MI (USA), 27 Feb - 3 Mar 1989; Other Information: Technical Paper 890157
Country of Publication:United States
Language:English
Subject: 02 PETROLEUM; 33 ADVANCED PROPULSION SYSTEMS; 2-METHYLPROPANE; IGNITION; BUTANE; SPARK IGNITION ENGINES; IGNITION QUALITY; ANTIKNOCK RATINGS; AUTOMOTIVE FUELS; CHEMICAL COMPOSITION; CHEMICAL REACTION KINETICS; KNOCK CONTROL; ALKANES; CONTROL; ENGINES; FUELS; HEAT ENGINES; HYDROCARBONS; INTERNAL COMBUSTION ENGINES; KINETICS; ORGANIC COMPOUNDS; REACTION KINETICS 025000* -- Petroleum-- Combustion; 330101 -- Internal Combustion Engines-- Spark-Ignition