Gas generator and assembly method thereof

Abstract

The invention provides a gas generator and an assembling method thereof. The lower end of a cylindrical shell is provided with an exhaust end cover. The cylindrical shell is equipped with a gas throttling component, a tubular shell, a cup-shaped ignition shell, and an ignition base, all of which are arranged from the bottom to the top in order. The exhaust end cover of the cup-shaped structure is provided with a plurality of air exhaust openings. A large flange is arranged at the opening end of the gas throttling component of the cup-shaped structure. A small flange is arranged close to the enclosed end. Multiple communicating holes are formed in the circumferential wall of the gas throttling component. Multiple communicating holes are formed in the circumferential wall of the tubular shell with a large upper section, a small lower part and a cylindrical structure. A gas generation agent is loaded in the tubular shell. A flame spreading agent is loaded in the cup-shaped ignition shell. The bottom is provided with a flame spreading port communicating with an inner cavity of the tubular shell. The ignition base is arranged on the upper end of the cup-shaped ignition shell in a press fitting mode.The gas generator is low in internal pressure, and good in gas flowability and effectively ensure stable combustion of the gas generation agent.

Description

technical field [0001] The present invention relates to a gas generator and a method of assembling the same, which are installed in restraint devices in vehicles, such as airbag systems, etc., and more particularly, to a gas generator used in a side impact airbag system for placing the airbag in a The occupant side unfolds. Background technique [0002] The gas generator used for the deployment of the vehicle side impact airbag is usually designed in a slender cylindrical shape due to the limitation of the installation location space. [0003] The aspect ratio of this type of gas generator is greater than 1. When the gas generating agent in the combustion chamber is ignited, only the gas generating agent close to the fire transfer agent can be ignited normally, producing a large amount of hot gas and causing the local pressure to rise. If This part of the gas cannot flow out of the combustion chamber normally and is discharged, which causes the internal pressure of the enti...

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Problems solved by technology

[0003] The aspect ratio of this type of gas generator is greater than 1. When the gas generating agent in the combustion chamber is ignited, only the gas generating agent close to the fire transfer agent can be ignited normally, generating a large amount of hot gas and causing the local pressure to rise. If This part of the gas cannot flow out of the combustion chamber normally, causing the pressure inside the entire combustion chamber to rise sharply, thereby interfering with the normal operation of the gas generator.

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