Daicel Corporation

Toyota Jidosha Kabushiki Kaisha

Daicel Chemical Industries, Ltd.

Yusuke Komine

Haruhiko Yamashita

Osamu Fukawatase

Naoki Matsuda

Tomoharu Kobayashi

Toru Ozaki

Takaki Fukuyama

Yasushi Itou

Akifumi Noda

Hiroki Murase

A gas generator includes, a cylindrical housing provided with an ignition device and a diffuser, and an inner cylindrical member defining a gap with an inner circumferential wall surface of the cylindrical housing and leading to a gas discharge port. The inner cylindrical member is formed of a plurality of cylindrical members having gas inlet-outlet holes and connected in an axial direction. An opening of each of the cylindrical members has concave-convex portions for fitting the cylindrical members together. Both ends of the connected cylindrical members have a first protrusion on a side of the ignition device serving as a first abutment portion, and a second protrusion on the side of the diffuser portion serving as a second abutment portion. The first and second abutment portions abut the inner circumferential wall surface of the cylindrical housing and have a hole or a cutout to allow a gas to pass.

Gas generator

The present invention provides a gas generator in which an effect of decreasing the temperature of a combustion gas and an effect of capturing mist of the combustion gas are adjusted. A cup member disposed in a cylindrical housing has one gas passage hole selected from a first gas passage hole, which is formed in part of a circumferential wall on the side of an opening, a second gas passage hole, which is formed in part of a circumferential wall on the side of a bottom portion, and a third gas passage hole, which is formed between the first gas passage hole and the second gas passage hole. By selecting one of the above gas passage holes, the effect of decreasing the temperature of the combustion gas and the effect of capturing mist of the combustion gas are adjusted.

An inflator () comprised of an inner case () and an outer case (). The inflator () includes a combustion chamber located inside the inner case (), a plurality of gas discharge ports () formed on the outer case (), a gas outlet port () formed on an outer surface of the inner case () and a gas guide section that guides the inflation gas exited the gas outlet port () toward the gas discharge ports (). The gas guide section includes between the outer case () and inner case () a guide wall () provided with a guide plane that contacts with and redirects the inflation gas. The guide plane is formed into an arc face so as to swivel the inflation gas exited the gas outlet port () in a swirl or helical fashion, guide the inflation gas toward the gas discharge ports () and capture residuals.

Inflator

Growing community of inventors

Tatsuno, Japan

Yusuke Komine