Gas generator with controllable fluid injection
AssigneeTRW Airbag Systems GmbH
InventorsJohann Huber, Markus Lindner, Herbert Ragner, Marc Winterhalder, Michael Gabler
Life of this patent
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Abstract
A gas generator for a safety system, in particular for a vehicle occupant restraint system, comprises a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of the propellant, a fluid chamber containing a fluid, a mixing chamber in which fluid and hot gas are mixed in a mixture ratio, and at least one control device which controls the mixture ratio of fluid and hot gas in the mixing chamber.
Claims20
A gas generator for a safety system, in particular for a vehicle occupant restraint system, said gas generator comprising:
- a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of said propellant,
- a fluid chamber containing a fluid,
- a mixing chamber in which fluid and hot gas are mixed in a mixture ratio,
- at least one control device which controls said mixture ratio of fluid and hot gas in said mixing chamber,
- a pressure chamber separated from said fluid chamber by an ejection piston,
- compressed gas being introduced into said pressure chamber for displacing said ejection piston,
- at least a portion of said hot gas forming said compressed gas and this portion arrives into said pressure chamber via at least one conduit,
- said control device controlling the quantity of compressed gas flowing into said pressure chamber,
- said conduit being constituted by a central gas conduit pipe through which, after ignition, at least a portion of said hot gas flows out of said combustion chamber to said control device.
A gas generator for a safety system, in particular for a vehicle occupant restraint system, said gas generator comprising:
- a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of said propellant,
- a fluid chamber containing a fluid,
- a mixing chamber in which fluid and hot gas are mixed in a mixture ratio,
- at least one control device which controls a mixture ratio of fluid and hot gas in said mixing chamber,
- a pressure chamber separated from said fluid chamber by an ejection piston and
- a discharge channel originating from said pressure chamber via which channel hot gas which is introduced into said pressure chamber can flow out into an environment with lower pressure, after stopping the supply of further hot gas.
A gas generator for a safety system, in particular for a vehicle occupant restraint system, said gas generator comprising:
- a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of said propellant,
- a fluid chamber containing a fluid,
- a mixing chamber in which fluid and hot gas are mixed in a mixture ratio,
- at least one control device which controls a mixture ratio of fluid and hot gas in said mixing chamber,
- downstream of said fluid chamber a fluid guiding pipe being arranged, in the interior of which said fluid being guided from said fluid chamber to said mixing chamber, said control valve being arranged between said fluid guiding pipe and said fluid chamber.
A gas generator for a safety system for a vehicle occupant restraint system, said gas generator comprising:
- a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of said propellant,
- a fluid chamber containing a fluid,
- a mixing chamber in which fluid and hot gas are mixed in a mixture ratio,
- at least one control device which controls said mixture ratio of fluid and hot gas in said mixing chamber, and
- a pressure chamber which is separated from said fluid chamber by an ejection piston in such a manner that fluid is prevented from immediately flowing into said pressure chamber during operation of said generator, said pressure chamber being flowingly connected with said combustion chamber to allow said hot gas to flow into said pressure chamber and to displace said ejection piston.
A gas generator for a safety system for a vehicle occupant restraint system, said gas generator comprising:
- a combustion chamber filled with propellant, in which a hot gas is generated after igniting and burning of said propellant,
- a fluid chamber containing a fluid,
- a mixing chamber in which fluid and hot gas are mixed in a mixture ratio,
- at least one control device which controls said mixture ratio of fluid and hot gas in said mixing chamber, and
- a pressure chamber which is separated from said fluid chamber by an ejection piston,
- said control device controlling a quantity of hot gas flowing into said pressure chamber.
Dependencies are inferred from the claim text.