000			01583nab a2200181 4500
005			20260520000845.0
008			260224s2009 xxu
245	0	0	_aNumerical study on optimal operating conditions of homogeneous charge compression ignition engines fueled with dimethyl ether and n-heptane
260			_a _b _cjul./ago. 2009
270			_a15/06/2010 ; 15/06/2010
300			_a10 p. ; 3909-3918
520			_aTranscripción del resumen del autor. This paper describes a numerical study for analyzing combustion and emission characteristics and for suggesting optimal operating conditions of homogeneous charge compression ignition (HCCI) engines fueled with dimethyl ether (DME). Numerous calculations for DME HCCI engines were conducted for wide ranges of intake temperatures, equivalence ratios, and boost pressures. On the basis of the results for HCCI engines, engine performance and emissions including CO, HC, NOx, and soot are shown on a peak cycle temperature and equivalence ratio map. In addition, combustion and emission characteristics of DME HCCI engines were compared to those of n-heptane HCCI engines for the same supplied lower heating values. Results of the present study showed that soot, HC, and NOx emissions are decreased but CO emission is increased by using DME instead of n-heptane for HCCI engines. Furthermore, the DME HCCI engine has a wider optimal operating range than the n-heptane HCCI engine.
581			_a4
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aPark, Sung Wook _942751
999			_c171064 _d171064