Dynamit Nobel Aktiengesellschaft

Dynamit Nobel Aktiengesselschaft

Dynamit Nobel Aktiengsellschaft

Wolfram Seebeck

Uwe Brede

Josef Kraft

Gerhard Kordel

Horst Wellner

Gas generator for an inflatable impact cushion for protecting an occupant of a motor-vehicle from injury, has a housing, in which is formed a storage chamber for liquid gas. The storage chamber is separated by a partition wall from a combustion chamber also formed in the housing. An ignition device is positioned in a precombustion chamber, and has an ignition charge to generate combustion gases during ignition. In the precombustion chamber there is guided, in a displaceable manner, a piston which, because of the combustion gases of the ignition charge, moves into and through the combustion chamber in a direction of the partition wall, in order to penetrate the partition wall. When the partition wall is penetrated there is a connection between the storage chamber and the combustion chamber by way of a liquid gas channel system so that liquid gas can flow into the combustion chamber. At the same time a connection is created between the precombustion chamber and the (main) combustion chamber by way of ignition channels formed in the piston. The hot combustion gases of the ignition charge ignite the liquid gas flowing in. The rising internal pressure in the combustion chamber causes a displacement of the longitudinally displaceably guided partition wall, which moves together with the piston and thereby continuously injects liquid gas from the storage chamber into the combustion chamber. The combustion gases emerge by way of annular chambers, connected in series, through outlet openings in the housing.

Gas generator, particularly for an inflatable impact cushion for

Gas generator for an inflatable impact cushion for protecting an occupant of a motor-vehicle from injury, has a housing, in which is formed a storage chamber for liquified gas. The storage chamber is separated by a partition wall from a combustion chamber also formed in the housing. An ignition device is positioned in a precombustion chamber, and has an ignition charge to generate combustion gases during ignition. In the precombustion chamber there is guided, in a displaceable manner, a piston which, because of the combustion gases of the ignition charge, moves into and through the combustion chamber in a direction of the partition wall, in order to penetrate the partition wall. When the partition wall is penetrated there is a connection between the storage chamber and the combustion chamber by way of a liquified gas channel system so that liquified gas can flow into the combustion chamber. At the same time a connection is created between the precombustion chamber and the (main) combustion chamber by way of ignition channels formed in the piston. Hot combustion gases of the ignition charge ignite the liquified gas. The rising internal pressure in the combustion chamber causes displacement of the longitudinally displaceably guided partition wall, which moves together with the piston and thereby continuously forces liquid gas from the storage chamber into the combustion chamber. The combustion gases emerge, through outlet openings in the housing.

Gas generator for an inflatable impact cushion for protecting an

A passive safety device comprises a sensor unit for determining vehicle accelerations and decelerations, an evaluating unit for evaluating the output signal of the sensor unit, and a triggering unit for the activation of an occupant protection system upon the reception of a trigger signal, to protect the occupants from injuries. The individual units of the safety device are connected by way of optical lightguides, i.e. the communication among the individual units takes place through optical light signals. The sensor unit has an optical-mechanical acceleration sensor with at least one input lightguide, light being transmitted to the acceleration sensor by way of this lightguide. This light is transmitted within the acceleration sensor to at least one output lightguide. The optical system of the acceleration sensor arranged between the two lightguides is exposed to the accelerations to be detected and changes its optical properties in dependence on the magnitude of the acceleration forces. The output signal of the acceleration sensor, i.e. the light from the at least one output lightguide, is a measure for the effective acceleration and permits either quantitative information or qualitative information (larger than, larger than or equal to, smaller than, smaller than or equal to a predetermined threshold value) regarding the actual acceleration.

Growing community of inventors

Veitsbronn, Germany

Wolfram Seebeck