Passenger Protection Device

• US 20080030012A1
• Filed: 01/05/2005
• Published: 02/07/2008
• Est. Priority Date: 02/26/2004
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Kuttenberger, Alfred, Nitschke, Werner, Herrmann, Thomas, Groeger, Ulrike, Wottreng, Walter, Mattes, Bernhard, Guettler, Hans, Groesch, Lothar, Balzer, Kunt, Vogt, Alexander, Stuetzler, Frank-Juergen, Stumpp, Hans-Peter, Schumacher, Hartmut, Moritz, Rainer, Schmid, Michael, Kroeninger, Mario, Lich, Thomas
• Application Number:
  US10/588,598
• Publication Number:
  US 20080030012A1
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/01218 control of expansion speed
• CPC Class Codes: B60R 2021/26094 characterised by fluid flow controlling valves
• CPC Class Codes: B60R 2021/2765 comprising means to control the venting
• CPC Class Codes: B60R 21/01504 detecting bag displacement
• CPC Class Codes: B60R 21/01526 using piezoelectric elements
• CPC Class Codes: B60R 21/276 with means to vent the inflation fluid source, e.g. in case of overpressure B60R21/30 takes precedence; venting means on inflatable member walls B60R21/239

Abstract

A passenger protection device in a motor vehicle includes at least one airbag, at least one gas generator for filling the airbag, an airbag control device for activating the airbag, means for acquiring the deployment speed of the airbag, and means for regulating the filling quantity of the airbag, taking into account its deployment speed. In order for the passenger protection device to implement a controlled filling of the airbag dependent on its deployment speed, at least one flow-off valve is provided that is situated between the gas generator and the airbag. In addition, controllable actuating means are provided for the sealing of the flow-off valve.

Claims

1-7. -7. (canceled)

8. A protection device for a passenger in a vehicle, comprising:

an airbag;

a gas generator for filling the airbag;

an airbag control device for activating the airbag;

a measurement unit for acquiring a deployment speed of the airbag;

a connecting module for regulating a filling quantity of the airbag, taking into account the deployment speed of the airbag, wherein the connecting module includes a flow-off valve situated between the gas generator and the airbag; and

a controlled actuating unit for selectively sealing the flow-off valve.

9. The protection device as recited in claim 8, wherein the controlled actuating unit for selectively sealing the flow-off valve is controlled by the airbag control device.

10. The protection device as recited in claim 8, wherein the controlled actuating unit for selectively sealing the flow-off valve includes at least one piezo-actuator connected to one of a mechanical lever device and a hydraulic lever device.

11. The protection device as recited in claim 8, wherein the controlled actuating unit for selectively sealing the flow-off valve includes at least one electromagnet.

12. The protection device as recited in claim 8, wherein the gas generator for filling the airbag is a cold-gas generator having a pressure vessel filled with a noble gas mixture under pressure, wherein the pressure vessel is sealed by a burst disk that is configured to be destroyed with the aid of a pyrotechnic charge.

13. The protection device as recited in claim 8, wherein the measurement unit for acquiring the deployment speed of the airbag includes a transceiver device for sending an optical signal into the airbag, and wherein at least a portion of the inside of the airbag is provided with a light-reflecting coating.

14. The protection device as recited in claim 13, wherein the deployment speed of the airbag is determined by one of:

a) measuring a propagation time of the optical signal;

b) utilizing the Doppler effect with respect to the optical signal; and

c) utilizing a triangulation method with respect to the optical signal.