Abstract: A method of activating at least one electrical igniter incorporated in each of a plurality of gas generators provided in an air bag system is provided. The method includes: connecting an electronic control unit to a power source and an impact detecting sensor; providing a bus line having a plurality of loop wires passing through the electronic control unit to supply and transmit current and required information; connecting each of the at least one electrical igniter to the electronic control unit through the bus line branched from predetermined portions of the bus line; providing each of the at least one electrical igniter with a heat generating portion, a priming ignited by the heat generating portion, a capacitor, and an integrated circuit recorded with information to exhibit required functions; and supplying a current for igniting the priming to the at least one igniter through the capacitor.

Abstract: An igniter assembly having excellent moisture proof is provided.

Abstract: A gas generator which is inexpensive and easily assembled is provided. A cup body 20 loaded with a gas generating agent 24 and an igniter collar 14 holding an igniter main body 12 are connected and fastened in a way in which they are joined at a flange portion 20a and at an upper flat circumferential edge 15a, crimped by an upper end side 31 of a bent portion of a crimp case 30, and a lower flat circumferential edge 15b of a igniter collar 14 is crimped by a lower end side 32 of the bent portion of a crimp case 30. This is suitable as a gas generator for a pretensioner.

Abstract: The present invention provides a simple manufacturing method of parts of igniter which makes welding unnecessary. Electroconductive pins 51 and 52 are pushed in through-holes 45 and 46 of a header 40, and a heat generating body 30 is penetrated by the electroconductive pins 51 and 52. Thereafter, the heat generating body 30 is fixed by crimping one end portions 51a and 52a of the electroconductive pins 51 and 52.

Abstract: An initiator assembly is provided with a metallic collar securely combined to an electric type initiator to block a moisture penetration into the inside of a gas generator, thereby obtaining operation reliability of the gas generator. In the initiator assembly, at least part of the electric type initiator is surrounded by the metallic collar, and integrated with a resin. At least either of an annular protrusion and a cylindrical protrusion provided in the direction to surround the electric type initiator is formed on the metallic collar, and the protrusion is covered with the resin.

Abstract: The present invention provides an igniter for an air bag system in which the whole weight can be reduced. The present invention provides an igniter for an air bag system which is used in an air bag system comprising an ECU connected to a power source and an impact detecting sensor, and a module case accommodating a gas generator and an air bag and that is incorporated in the gas generator, wherein the system is constituted such that a bus line comprising plural loop wires passing through the ECU to supply currents and the like, and individual gas generators which are connected operationally by plural conductors branched from the bus line, the igniter is an electric igniter provided with a heat generating portion and a priming contacting the heat generating portion, the igniter and the bus line are connected to each other by the conductor, a capacitor and an IC are provided, and a current for igniting the priming is supplied through the capacitor.

Abstract: The present invention provides an initiator assembly in which a metallic collar and an electric type initiator are combined securely to block a moisture penetration into the inside of the gas generator, thereby obtaining operation reliability of the gas generator.

Abstract: The present invention provides an igniter for an inflator in which a heat generating body generating heat with an ignition current is not damaged, the heat generating body securely contacts a pyrotechnic material and further, a manufacturing process can be facilitated, and a method of manufacturing the same.

Abstract: The present invention provides an igniter for an air bag system in which the whole weight can be reduced.

Abstract: The present invention provides an air bag system which can be reduced in weight while maintaining an excellent operation performance.

Abstract: The present invention provides a method of determining a charging capacitance of a capacitor in an air bag system using a bus system.

Abstract: The present invention provides an integrated circuit for an air bag system which can be reduced in weight while maintaining an excellent operation performance.

Abstract: The present invention provides a current supplying circuit in which the weight of an air bag system is reduced.

Abstract: An airbag inflator includes non-azide gas generating propellants, surrounding an ignition device, disposed inside a housing. The gas generating propellants are surrounded by a coolant/filter device having a pressure loss of 0.3×10−2 to 1.5×10−2 kg/cm2 at a flow rate of 100 l/min/cm2. A space is provided between an outer periphery of the coolant/filter device and the housing such that the combustion gas passes through the entire area of the coolant/filter device. The coolant/filter device is also surrounded by a swell suppressing layer which prevents the coolant/filter device from swelling due to a combustion of the gas generating propellants.

Abstract: The present invention provides an igniter for an air bag system which has an excellent operation performance and can be reduced in weight.

Abstract: The present invention provides an electric type initiator having a stable electric characteristic, and thereby provides an electric type initiator having better reliability and an initiator assembly using the same.

Abstract: An airbag gas generator has a housing having gas discharge ports, an ignition unit provided within the housing for generating a combustion product upon activation thereof, the ignition unit including an igniter having an output pressure of 700 psi or higher at 20° C. atmosphere when said igniter is burned within a hermetically closed cylinder having a volume of 10 cc, and a seal device for closing the gas discharge ports to prevent fluid communication between an inside and outside of the housing before activation of the gas generator, the seal means being ruptured by an inner pressure increased as a result of the generation of the combustion product.

Abstract: Gas generating pellets for an air bag system causes the initial inflating speed of the air bag to be increased at a reduced rate to prevent a passenger from being injured due to vigorous inflation of the air bag in the initial period, while maintaining sufficient ability to restrict the passenger after 35 to 50 milliseconds from the start of the inflation. Combustion of the gas generating pellets for an air bag system are controlled such that in a tank test conducted with respect to a gas generator using the pellets, where a desired maximum tank pressure is P (kPa), and a period of time from the start of rising of the tank pressure to the time when the maximum tank pressure P (kPa) is reached is T milliseconds, the tank pressure measured after 0.25×T milliseconds is not higher than 0.20×P (kPa), and the tank pressure measured after 0.80×T milliseconds is not lower than 0.70×P (kPa).

Abstract: An airbag gas generator with a simple construction, which operates to apply as small an impact as possible to the passenger during the initial stage of its operation and thereafter rapidly increase the gas pressure to reliably protect the passenger. The airbag gas generator which includes in the housing with gas discharge ports a single ignition means activated by impacts, a gas generating agent ignited and burned by the ignition means to produce a combustion gas, and a filter means to cool the combustion gas and/or arrest combustion residue. The operation performance of the gas generator is adjusted such that the tank pressure measured at 0.25×T milliseconds will be 0.25×P (kPa) or less where a desired tank maximum pressure in the tank combustion test is P (kPa) and a period of time from the start of rising of the tank pressure to the time when the maximum pressure P (kPa) is reached is T milliseconds.

Abstract: An airbag inflator includes non-azide gas generating propellants, surrounding an ignition device, disposed inside a housing. The gas generating propellants are surrounded by a coolant/filter device having a pressure loss of 0.3×10−2 to 1.5×10−2 kg/cm2 at a flow rate of 100 l/min/cm2. A space is provided between an outer periphery of the coolant/filter device and the housing such that the combustion gas passes through the entire area of the coolant/filter device. The coolant/filter device is also surrounded by a swell suppressing layer which prevents the coolant/filter device from swelling due to a combustion of the gas generating propellants.