Open AccessFuel property effects on engine combustion processes. Final report
Author(s) -
Nicholas P. Cernansky,
Dennis Miller
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/95334
Subject(s) - autoignition temperature , ignition system , octane rating , combustion , homogeneous charge compression ignition , butane , spark ignition engine , octane , chemistry , thermodynamics , nuclear engineering , materials science , organic chemistry , combustion chamber , engineering , physics , catalysis
A major obstacle to improving spark ignition engine efficiency is the limitations on compression ratio imposed by tendency of hydrocarbon fuels to knock (autoignite). A research program investigated the knock problem in spark ignition engines. Objective was to understand low and intermediate temperature chemistry of combustion processes relevant to autoignition and knock and to determine fuel property effects. Experiments were conducted in an optically and physically accessible research engine, static reactor, and an atmospheric pressure flow reactor (APFR). Chemical kinetic models were developed for prediction of species evolution and autoignition behavior. The work provided insight into low and intermediate temperature chemistry prior to autoignition of n-butane, iso-butane, n-pentane, 1-pentene, n-heptane, iso-octane and some binary blends. Study of effects of ethers (MTBE, ETBE, TAME and DIPE ) and alcohols (methanol and ethanol) on the oxidation and autoignition of primary reference fuel (PRF) blends