Abstract: A fuel injection control method for an internal combustion engine is provided. The internal combustion engine includes a fuel pump (38) that pressure-feeds fuel, a fuel injection valve (19) that injects the fuel pressure-fed by the fuel pump directly into a cylinder of the internal combustion engine (1), and a fuel pressure detection device (45) that detects a pressure of the fuel pressure-fed by the fuel pump.

Abstract: A fuel injection control method for an internal combustion engine is provided. The internal combustion engine includes a fuel pump (38) that pressure-feeds fuel, a fuel injection valve (19) that injects the fuel pressure-fed by the fuel pump directly into a cylinder of the internal combustion engine (1), and a fuel pressure detection device (45) that detects a pressure of the fuel pressure-fed by the fuel pump.

Abstract: A method for manufacturing materials solidified with sulfur, comprising the steps of bringing the water content of a mixture of sulfur and a raw material to less than 3% by weight, heating and mixing the mixture of raw materials including molten sulfur at 119 to 159° C., to cause the sulfur to penetrate and encapsulate the raw material that is solid or liquid at the molecular level, thereby preparing a fluid mixture, and, if necessary, then molding the mixture into a desired shape or cooling it into a granular form.

Abstract: A method for manufacturing materials solidified with sulfur, comprising the steps of bringing the water content of a mixture of sulfur and a raw material to less than 3% by weight, heating and mixing the mixture of raw materials including molten sulfur at 119 to 159.degree. C., to cause the sulfur to penetrate and encapsulate the raw material that is solid or liquid at the molecular level, thereby preparing a fluid mixture, and, if necessary, then molding the mixture into a desired shape or cooling it into a granular form.

Abstract: An apparatus for manufacturing molded materials solidified by sulfur includes an apparatus for bringing the water content of a solid raw material to be mixed with sulfur, such as slag and dust resulting from steel-making, to 3% by weight or below, an apparatus for heating and kneading the mixture of raw materials including molten sulfur at 119 to 159.degree. C., to cause the sulfur to penetrate into pore spaces on the solid raw material, thereby preparing a fluid kneaded mixture, and an apparatus for molding the mixture into a prescribed shape. Utilizing the apparatus, slag and dust resulting from steel-making, etc. is solidified with a melted sulfur thereby, enabling solidified and molded materials to be produced industrially, while preventing the generation of sulfurous acid gas. The materials' performance, such as physical strength and quality, are constant and high, and harmful heavy metals or the like will not ooze out of the materials.