| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel oil composition for a low-temperature, premixed charge compression ignition engine that attains low-temperature, premixed charge compression ignition combustion even when operated under a condition such that an oxygen concentration in intake air is lowered down to 17 vol% or lower by employment of EGR, and can suppress deterioration in fuel volume consumption and decrease the discharge amount of CO<SB>2</SB>. SOLUTION: The fuel oil composition is one for a low-temperature, premixed charge compression ignition engine which is equipped with an exhaust gas recirculation apparatus for recirculating at least a part of exhaust gas into intake air and is operated under a condition such that the oxygen concentration in a mixed gas of the intake air with the recirculated exhaust gas is 17 vol% or lower, where the fuel composition has a sulfur content of at most 10 mass ppm, a 90 vol% distillation temperature of 360°C or lower, a cetane value (CN) of at least 55, an aromatic content of at most 10 mass%, a CO<SB>2</SB>emission unit of at most 0.069 g/kJ and a density at 15°C of at least 0.820 g/cm<SP>3</SP>. COPYRIGHT: (C)2010,JPO&INPIT |
