Abstract: A control device to be applied to an internal combustion engine having a fuel reformation cylinder and an output cylinder, wherein the compression end gas temperature of the fuel reformation cylinder is adjusted by changing an EGR gas amount, an effective compression ratio, or a polytropic number according to an equivalence ratio in the fuel reformation cylinder so as to achieve a target concentration of a specific gas component in reformed fuel generated in the fuel reformation cylinder. The target concentration is defined according to a required engine power.

Abstract: A control device (100) to be applied to an internal combustion engine (1) having a fuel reformation cylinder (2) and an output cylinder (3), wherein the compression end gas temperature of the fuel reformation cylinder (2) is adjusted by changing an EGR gas amount, an effective compression ratio, or a polytropic number according to an equivalence ratio in the fuel reformation cylinder (2) so as to achieve a target concentration of a specific gas component in reformed fuel generated in the fuel reformation cylinder (2). The target concentration is defined according to a required engine power.

Abstract: The present invention provides a fuel for homogeneous charge compression ignition engines, which can achieve a stable homogeneous charge compression ignition at a higher output. The fuel satisfies the following requirements (1), (2), (3), and (4): (1) certain distillation characteristics between an initial boiling point (IBP): 0° C. or higher and 60° C. or lower; and an end point (EP): 250° C. or higher and 380° C. or lower; (2) research octane number: 62 or greater and 85 or less; (3) density at 15° C.: 0.700 g/cm3 or higher and lower than 0.800 g/cm3; and (4) Reid vapor pressure at 37.8° C.: 30 kPa or greater and lower than 65 kPa.

Abstract: The present invention provides a fuel for homogeneous charge compression ignition engines, which can achieve a stable homogeneous charge compression ignition at a higher output. The fuel satisfies the following requirements (1), (2), (3), and (4): (1) distillation characteristics: initial boiling point (IBP): 0° C. or higher and 60° C. or lower; 30 volume percent distillation temperature (T30): 70° C. or higher and 130° C. or lower; 50 volume percent distillation temperature (T50): 95° C. or higher and 200° C. or lower; 70 volume percent distillation temperature (T70): 100° C. or higher and 280° C. or lower; 90 volume percent distillation temperature (T90): 150° C. or higher and 330° C. or lower; 95 volume percent distillation temperature (T95): 230° C. or higher and 360° C. or lower; and end point (EP): 250° C. or higher and 380° C. or lower; (2) research octane number: 62 or greater and 85 or less (3) density at 15° C.: 0.700 g/cm3 or higher and lower than 0.800 g/cm3; and (4) Reid vapor pressure at 37.

Abstract: The present invention provides a fuel capable of controlling the combustion reaction during homogeneous charge compression auto-ignition combustion to improve the engine thermal efficiency. The fuel satisfies specified characteristic requirements relating to: (1) the total content of C5 to C10 normal paraffins; (2) the total content of C6 to C11 aromatic hydrocarbons; (3) the content of olefinic hydrocarbons; (4) the content of oxygenates; (5) the research octane number; (6) the initial boiling point and end point in distillation characteristics; (7) the averaged maximum pressure rise rate of the fuel over continuous 400 cycles; and (8) the averaged IMEP of the fuel over continuous 400 cycles.