Gas generator

A gas generator, comprising:

• a housing including a diffuser shell provided with a gas discharge port and a closure shell, the housing defining therein a first combustion chamber accommodating a first gas generating agent therein;
• an enhancer chamber cup member provided within the first combustion chamber and defining an enhancer chamber accommodating therein a first ignition device for igniting and combusting the first gas generating agent, the enhancer chamber cup member including a first end, a second end opposite to the first end, and a circumferential surface extending from the first end to the second end, the first end being provided with a first top plate, and the circumferential surface being provided with an enhancer hole communicating the enhancer chamber with the first combustion chamber during activation;
• and
• a combustion chamber cup member provided eccentrically to a central axis of the housing within the first combustion chamber, the combustion chamber cup member defining a second combustion chamber including therein a second ignition device and a second gas generating agent, and having a second top plate and a through-hole for communicating the second combustion chamber with the first combustion chamber during activation, the combustion chamber cup member being provided such that the enhancer hole is provided in the circumferential surface of the enhancer cup member at a height between the first top plate and the second top plate,
• the first top plate being positioned higher than the second top plate so that a space accommodating the first gas generating agent is provided above the second top plate, and the enhancer hole being provided such that the enhancer hole opposes the space where the first gas generating agent is provided.

A gas generator, comprising:

• a housing;
• a first combustion chamber defined inside the housing;
• an enhancer chamber cup member accommodated inside the first combustion chamber and defining, therein, an enhancer chamber, the enhancer chamber cup member having a first end, a second end opposite to the first end, a circumferential surface extending from the first end to the second end, a first top plate provided at the first end, and an enhancer hole provided in the circumferential surface for communicating the enhancer chamber with the first combustion chamber during activation;
• and
• a combustion chamber cup member accommodated inside the first combustion chamber and outside the enhancer chamber cup member and defining therein a second combustion chamber, the combustion chamber cup member having a second top plate at an upper end thereof and a through-hole for communicating the second combustion chamber with the first combustion chamber during activation,
• wherein the enhancer chamber cup member accommodates a first ignition device and a first gas generating agent ignited by the first ignition device,
• the combustion chamber cup member accommodates a second ignition device and a second gas generating agent ignited by the second ignition device,
• the enhancer hole is provided in the circumferential surface of the enhancer chamber cup member at a height between the first top plate and the second top plate, and
• the first top plate is positioned higher than the second top plate so that a space accommodating the first gas generating agent is provided above the second top plate, and the enhancer hole is provided such that the enhancer hole opposes the space where the first gas generating agent is provided.