Daicel Chemical Industries, Ltd.

Toyoda Gosei Co., Ltd.

Yasunori Iwai

Nobuyuki Katsuda

Yoshihiro Nakashima

Nobuyuki Ohji

Masayuki Yamazaki

Masayuki Nakayasu

Katsuhito Miyaji

Atsushi Hatomoto

Naoki Matsuda

Akihisa Ogawa

Yuzo Goto

Shingo Oda

Mikio Yabuta

Hiroaki Shinto

Kenji Numoto

Masakazu Tokuda

Masaru Masaki

Yuzo Gotoh

Masayuki Ueda

Tetsushi Hiramitsu

Masato Hirooka

Eiichi Ryobo

Takashi Okuyama

Toshiro Iwakiri

Koji Shiraki

Yoshihiro Nakshima

Hiroshi Shioji

Toshirou Iwakiri

Gas generator

The invention relates to an inflator including:

Inflator

An air bag inflator has a cylindrical housing defining an internal space therein and having a convex portion protruding towards the internal space, and a cup member provided inside the cylindrical housing and having a cylindrical wall, provided with a vent hole that communicates inside the cup member with a space defined by the cup member and an inner surface of the cylindrical housing, and an end wall closing a first end of the cylindrical wall. The cup member is supported inside the cylindrical housing by making contact with the convex portion. An inflator assembly method includes, forming the convex portion, providing the cup member, and inserting the cup member inside the internal space of the cylindrical housing, such that the cup member abuts the convex portion.

Inflator for an air bag

Gas generator for air bag having any of the following members: deflecting member formed as tube portion capable of shielding gas discharge port formed on circumferential wall of housing from inside; coolant/filter means supporting member comprising annular portion arranged to face end surface of housing and wall portion contacting with inner periphery of coolant/filter means; coolant/filter means formed in cylindrical shape obtained by laminating wire mesh; housing securely fixing igniter included in ignition means, having opening portion for inserting and fixing igniter or igniter supporting member, wherein the opening portion is provided with connecting portion for fixing inserted igniter or igniter supporting member, and connecting portion is provided in inner side of housing rather than end surface having the opening portion.

Gas generator for air bag, deflecting member, coolant/filter means supporting member, coolant and housing

A dual-type gas generator for inflating air bags is provided in which a first igniter structure having a first combustion chamber accommodating a first gas generating material and a second igniter structure having a second combustion chamber accommodating a second gas generating material both exhaust, when activated, to exhaust gas to a common filter chamber. When the igniter structures are intended to be activated separately and with a time lag, gas generated in the first chamber often flows into the second chamber and may ignite the second gas generating material. This malfunction can be prevented by various flame-transferring preventing structures that preclude direct flow of gas from the first chamber into the second chamber through the common filter chamber.

Gas generator for an air bag

Inflator for airbag

An opening portionof an inflator housingand a diffuser portionare connected by welding, and an inflow portionof a gas discharging portis press-fitted in and connected to a first gas discharging holeof the diffuser portion

When a gas generating agentinside a first combustion chamberis burnt, a gas generating agentis prevented from being burnt by function of a metal thin plateclosing a communication holewith a second combustion chamber. A cuphaving a holeis covered on an igniter, and the flame thereof advances into a transfer chargestraightly in a narrow width. Accordingly, since the transfer chargeis burnt completely, sufficient flame for burning a gas generating agentcan be generated securely. A communication holebetween a first combustion chamberand a second combustion chamberis closed by double-layered seal tapelaminated through an adhesive layer. After activation, the seal tapesare not ruptured due to increase in the internal pressure of the first combustion chamber, but they are peeled off easily due to increase in the internal pressure of the second combustion chamber

Gas generator for air bag and air bag apparatus

A gas generator has an inner cylindrical member disposed in a cylindrical housing, an annular first combustion chamber provided radially in the outside of the inner cylindrical member, and, in the combustion chamber, a ratio of its radial average distance to its axial average length is adjusted to be in the range of 0.2 to 2.0. The gas generator has a retainer which changes a flow of a gas ejected from a through-hole in the inner cylindrical member and has a cylindrical portion for collecting fluid and semifluid combustion products included in the gas.

Gas generator for air bag and air bag device

A gas generator for an air bag includes a filter having excellent cooling effect. A gas flow as illustrated in the drawings is formed by effect of the inner cylindrical shielding plate, the outer cylindrical shielding plate, the first gapand the second gap, which sandwich a cylindrical filterfor cooling a combustion gas from the both side. Thus, the cooling effect of the combustion gas is enhanced.

Gas generator for air bag

Combustion residues of a gas generating agent remain in an inflator due to composition of the gas generating agent, temperature difference between combustion gas and pressurized gas isolated by a rupturable plate, collision of the combustion gas against a wall surface and the like. The inflator inflates an air bag with pressurized gas and combustion gas, while satisfying the following requirements: (1) pressurized gas contains an inert gas and substantially no oxygen; (2) in the gas generating agent, a pressure is 0.8 or less; (3) a mole ratio of an amount of pressurized gas and the combustion gas is 1 to 10; (4) a ratio of a mass of pressurized gas and the gas generating agent is 1 to 10; (5) a mass of a gas generating agent is 1 to 30 g; and (6) the pressurized gas is charged at 30,000 to 67,000 kPa.

A gas generator for an air bag having a simple structure, which is activated to apply as small an impact as possible to a vehicle occupant at the initial stage of activation and, thereafter, can reliably protect the vehicle occupant by rapidly increasing gas pressure, is provided. It is a gas generator for an air bag in which an inner cylindrical member is disposed in the housing to define an ignition means accommodating chamber and a combustion chamber, plural flame-transferring holes for communicating the both chambers with each other are formed on the circumferential surface of the inner cylindrical member, and the plural flame-transferring holes are formed at a distance of less than 30% of the axial length of the inner cylindrical member, from an end of the inner cylindrical member. A gas generator, which can use even a gas generating agent with less ignitability, and further can exhibit enough operation performance at the initial stage of activation even when using such a gas generating agent, is provided. It is a gas generator for an air bag in which an inner cylindrical member is disposed in the housing to define an ignition means accommodating chamber and a combustion chamber, and the central angle formed by the adjacent communicating portions which are formed on the circumferential surface of the inner cylindrical member is adjusted to be not more than 60 degrees.

Air bag-use gas generator and air bag device

An inflator, includes: an inflator housing which has an opening portion and charged with a pressurized gas; a diffuser portion provided in an opening portion side of the inflator housing and having a gas discharging port for discharging outside a pressurized gas flowing from the opening portion at activation; a first rupturable plate closing a pressurized gas flow path between the inflator housing and the diffuser portion; and a filter disposed between the first rupturable plate and the gas discharging port, the filter including one of a flat plate with a plurality of holes or a wire mesh and a surface of the filter in a first rupturable plate side having a concave portion and a convex portion.

The present invention provides a method of reducing an amount of NOx generated in actuation of a hybrid inflator. The present invention is a method of reducing nitrogen oxide which is generated in actuation of a hybrid inflator for an inflatable safety system of a vehicle provided with an airbag, the inflator comprising an inflator housing charged with a pressurized medium, a gas generator which is accommodated in the inflator housing and has one or two or more gas generating chambers storing a gas generating agent including a fuel and an oxidizing agent, and an igniting means connected to the gas generator, wherein a reducing compound having at least a reducing function of a nitrogen oxygen is placed in the hybrid inflator.

Method of reducing nitrogen oxide in hybrid inflator

An inflator for an air bag, which inflates the air bag by a pressurized medium, has a rupturable plate that seals a pressurized portion of an inflator prior to an activation of the inflator. The rupturable plate is attached to the inflator by fixing a peripheral edge portion thereof to the inflator, and has at least one of the following parameters: (a) a ratio of diameter/thickness is 14 to 50, (b) a tensile strength is 880 to 1100 N/mm, and (c) elongation is 25% or more.

Growing community of inventors

Shijyonawate, Japan

Yasunori Iwai