Abstract: A misfire determination apparatus for an internal combustion engine including a rotational speed detector detecting a rotational speed of an engine and a microprocessor. The microprocessor is configured to perform calculating a misfire parameter having a correlation with a change amount of the rotational speed in a combustion stroke of each of a plurality of cylinders and increasing as an increase amount of the rotational speed is large based on the rotational speed detected by the rotational speed detector, and determining that a single-cylinder misfire has occurred when the misfire parameter is less than a first predetermined value, while determining that the single-cylinder misfire or a multi-cylinder misfire has occurred when the misfire parameter is less than a second predetermined value greater than the first predetermined value.

Abstract: A misfire determination device, for an internal combustion engine, according to the present invention detects a combustion state parameter of the internal combustion engine, retrieves an extreme value of the combustion state parameter in an extreme value retrieval section from a start timing of a combustion stroke to a predetermined crank angle (step 5), upon retrieval of the extreme value, sets a predetermined crank angle section subsequent to a crank angle corresponding to the extreme value as a misfire determination parameter calculation section (step 6, expression 5), calculates a misfire determination parameter based on the combustion state parameter that has been detected in the misfire determination parameter calculation section (step 6), and determines a misfire based on the misfire determination parameter (steps 7 to 9).

Abstract: A control apparatus, for an internal combustion engine, detects a rotational speed parameter (time parameter) that represents a rotational speed of the internal combustion engine including a plurality of cylinders, detects a single misfire that is a misfire for every ignition for each of the plurality of cylinders, based on the rotational speed parameter that has been detected in each combustion stroke of the plurality of cylinders (steps 2 to 7 and 9), counts, as a misfire counter value, the number of times that the single misfire has been detected for each of the plurality of cylinders (steps 8 and 10), determines whether the misfire is occurring in the cylinder, based on the misfire counter value (steps 11 to 12), and corrects an ignition timing of the cylinder that has been determined that the misfire is occurring to an advance angle side (steps 25, 26, and 34).

Abstract: A gas generator contains hydrazodicarbonamide serving as a reducing agent, oxoacid salt serving as an oxidizing agent, and a combustion controller which is catalytic or combustible. As a combustible combustion controller, boron, and zirconium are preferred. The gas generator includes a flame coolant containing at least one compound selected from the group consisting of hydrates of metal sulfates, hydrates of metal nitrates, hydrates of metal carbonates, metal hydroxides, and hydrates of metal hydroxides in which the metal moieties are selected from the III, IV, V, and VI Period metal of the Periodic Table. As a flame coolant, magnesium hydroxide is preferred.

Abstract: There is provided a process for manufacturing a granular igniter, which facilitates control of the igniter preparation, handling of the granule igniter and improvement in manufacturized yield. The present invention also provides a process for manufacturing a granular igniter which is free from toxic gas generation when burned and which has excellent fluidity. The present invention moreover reduces the number of manufacturing process facilitating the production process, and reducing production costs.An igniter containing boron and potassium nitrate are mixed together with water in a homogenizer to form a homogeneous slurry. The mixing ratio of the igniter to the water is set in the range of 1.0:0.6 to 1.0:1.6 in terms of weight ratio. The slurry is sprayed in a spray dryer where it is dried and granulated. Micropowder, which failed to be collected as the granule, is recovered through a cyclone, and recirculated as the raw material.

Abstract: The gas generator composition contains sodium azide and an oxidizing agent as major components. This gas generator composition additionally contains 2 to 8% by weight of magnesium aluminate. To produce this composition, sodium azide and the oxidizing agent are admixed to a colloidal silica having a silica concentration of 3 to 15% by weight to form a slurry, followed by granulation and drying of the slurry.

Abstract: A gas generator composition, primarily containing perchlorate and cellulose acetate is provided to generate a large amount of gas without forming any substantial amount of harmful carbon monoxide. A metal oxide is additionally incorporated in an amount of more than 5% by weight and not more than 40% by weight. For example, 50 to 87% by weight of potassium perchlorate and 8 to 26% by weight of cellulose acetate are incorporated in the composition. The gas generator composition contains 36% by weight or less of bitetrazole metal hydrate, preferably bitetrazole manganese dihydrate, since it forms no corrosive residue after burning. The composition contains a nonmetallic compound consisting at least of nitrogen and hydrogen and containing at least 11% by weight of nitrogen. As such compound, nitroguanidine, guanidine nitrate, etc. is employed. The compounds preferably contains 10 to 83% by weight of nitrogen. The compound is preferably incorporated in an amount of 10 to 45% by weight.

Abstract: The gas generator composition contains sodium azide and an oxidizing agent as major components. This gas generator composition additionally contains 2 to 8% by weight of magnesium aluminate. To produce this composition, sodium azide and the oxidizing agent are admixed to a colloidal silica having a silica concentration of 3 to 15% by weight to form a slurry, followed by granulation and drying of the slurry.