Gas generator
First Claim
Patent Images
1. A hybrid gas generator for vehicle occupant restraint systems, comprising:
- a housing having an outer wall;
at least one outflow opening in said outer wall for the outlet of generated gas;
at least one combustion chamber containing propellant, present in tablet form;
at least one igniter arranged close to said propellant for igniting said propellant;
said igniter comprising an ignition material; and
an expansion chamber for said generated gas developing on deflagration of said ignition material, which expansion chamber immediately adjoins said igniter in a circumferential direction and a pressure chamber containing stored compressed gas in the non-activated state of said gas generator;
said expansion chamber separating said combustion chamber from said igniter; and
said combustion chamber with said propellant being open with respect to the expansion chamber and said pressure chamber in said non-activated state of said gas generator.
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Accused Products
Abstract
A gas generator, in particular for vehicle occupant restraint systems, with at least one combustion chamber containing propellant, and with at least one igniter arranged close to the propellant, for igniting the propellant is characterized in that the combustion chamber is separated from the igniter by an expansion chamber surrounding the igniter and provided for the gas developing on deflagration of the ignition material.
17 Citations
20 Claims
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1. A hybrid gas generator for vehicle occupant restraint systems, comprising:
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a housing having an outer wall; at least one outflow opening in said outer wall for the outlet of generated gas; at least one combustion chamber containing propellant, present in tablet form; at least one igniter arranged close to said propellant for igniting said propellant; said igniter comprising an ignition material; and an expansion chamber for said generated gas developing on deflagration of said ignition material, which expansion chamber immediately adjoins said igniter in a circumferential direction and a pressure chamber containing stored compressed gas in the non-activated state of said gas generator; said expansion chamber separating said combustion chamber from said igniter; and said combustion chamber with said propellant being open with respect to the expansion chamber and said pressure chamber in said non-activated state of said gas generator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hybrid gas generator for vehicle occupant restraint systems, comprising:
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a housing having an outer wall; at least one outflow opening in said outer wall for an outlet of generated gas; at least one combustion chamber containing propellant; at least one igniter arranged close to said propellant for igniting said propellant, said igniter comprising an ignition material; stored compressed gas within said housing; an expansion chamber for said generated gas developing on deflagration of said ignition material; said expansion chamber separating said combustion chamber from said igniter; said expansion chamber and said combustion chamber being separated from each other by a diffuser having at least one compressed gas opening which is open in the non-activated state of said gas generator; said gas developing on deflagration of said ignition material reaching said combustion chamber via said compressed gas opening; and said diffuser having a passage opening directed and being open towards said outflow opening in a non-activated state of said gas generator so that gas generated by activation of the igniter can reach the outflow opening without flowing through the combustion chamber. - View Dependent Claims (8, 9, 10)
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11. A gas generator for vehicle occupant restraint systems, comprising:
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a housing having an outer wall; at least one outflow opening in said outer wall for an outlet of generated gas; at least one combustion chamber containing propellant; at least one igniter arranged close to said propellant for igniting said propellant; said igniter comprising ignition material; an expansion chamber for said generated gas developing on deflagration of said ignition material; said expansion chamber separating said combustion chamber from said igniter; said expansion chamber and said combustion chamber being separated from each other by a diffuser having at least one compressed gas opening; said gas developing on deflagration of said ignition material reaching said combustion chamber via said compressed gas opening; said housing having a housing base with a filling opening for said propellant, which opening is closed by a base plate; said igniter being secured in said base plate in a pressure- and gas-tight manner; said diffuser having an end on a base side; and an electrically non-conducting body which extends between said base plate welded to said housing base, and said end of said diffuser on said base side, and which also extends into said combustion chamber, where said non-conducting body fixes said propellant, present in tablet form, in its position. - View Dependent Claims (12, 13, 14, 15)
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16. A gas generator for vehicle occupant restraint systems, comprising:
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a housing having an outer wall; at least one outflow opening in said outer wall for an outlet of generated gas; at least one combustion chamber containing propellant; at least one igniter arranged close to said propellant for igniting said propellant; said igniter comprising an ignition material; and an expansion chamber surrounding said igniter for said generated gas developing on deflagration of said ignition material; said expansion chamber separating said combustion chamber from said igniter; said gas generator being a hybrid gas generator and said combustion chamber being surrounded by a pressure chamber containing compressed stored gas; said gas generator further comprising a mixing chamber which is separated from the combustion chamber by an intermediate base; and said gas generator having a housing base from which a diffuser extends up to said intermediate base, said expansion chamber being open towards said combustion chamber via compressed gas openings and being open towards said mixing chamber via a separate passage opening, said passage opening being open in the non-activated state of said gas generator. - View Dependent Claims (17)
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18. A gas generator for vehicle occupant restraint systems, comprising:
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a housing having an outer wall; at least one outflow opening in said outer wall for an outlet of generated gas; at least one combustion chamber containing propellant; at least one igniter arranged close to said propellant for igniting said propellant; said igniter comprising an ignition material; and an expansion chamber surrounding said igniter for said generated gas developing on deflagration of said ignition material; said expansion chamber separating said combustion chamber from said igniter; said expansion chamber and said combustion chamber being separated from each other by a diffuser defining a separate part with at least one compressed gas opening; said gas developing on deflagration of said ignition material reaching said combustion chamber via said compressed gas opening; said gas generator being a hybrid gas generator and said combustion chamber being surrounded by a pressure chamber containing stored compressed gas; said gas generator further comprising a mixing chamber which is separated from the combustion chamber by an intermediate base; and said diffuser being fixed in position in radial direction on said intermediate base.
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19. A gas generator for vehicle occupant restraint systems, comprising:
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a housing having an outer wall; at least one outflow opening in said outer wall for an outlet of generated gas; at least one combustion chamber containing propellant; at least one igniter arranged close to said propellant for igniting said propellant; said igniter comprising an ignition material; and an expansion chamber surrounding said igniter for said generated gas developing on deflagration of said ignition material; said expansion chamber separating said combustion chamber from said igniter, said expansion chamber and said combustion chamber being separated from each other by a diffuser defining a separate part; said gas generator being a hybrid gas generator and said combustion chamber being surrounded by a pressure chamber containing stored compressed gas; said gas generator further comprising a mixing chamber which is separated from the combustion chamber by an intermediate base; and said gas generator having a housing base from which said diffuser extends up to said intermediate base and said diffuser having a central passage opening via which gases and particles developing on deflagration of said ignition material can move towards said outflow opening which is closed by a bursting sheet. - View Dependent Claims (20)
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Specification