Safety system for vehicle occupants

• US 7,802,811 B2
• Filed: 01/27/2006
• Issued: 09/28/2010
• Est. Priority Date: 03/11/2005
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schumacher, Hartmut, Karner, Ruediger
• Primary Examiner(s): Fleming; Faye M.
• Application Number:
  US11/885,890
• Publication Number:
  US 20080236928A1
• Time in Patent Office: 1,705 Days
• Field of Search: 280/735
• US Class Current: 280/735
• CPC Class Codes: B60R 2021/01177 Misdeployment, e.g. during assembly, disassembly, accident salvage or recycling
• CPC Class Codes: B60R 21/017 including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves

Abstract

A safety system for vehicle occupants includes at least one sensor, at least one actuator, and at least one control unit having output stages for controlling the at least one actuator. The safety system includes an arrangement for the activation of actuators not activated during an accident.

Claims

1. A safety system for occupants of a vehicle, comprising:

a control unit;

at least one sensor operatively connected to the control unit; and

at least two actuators operatively connected to the control unit, wherein each actuator is for actuating one of a passenger-restraint device and a stage of a passenger-restraint device in a case of a vehicle accident;

wherein;

the control unit includes at least one output stage for controlling activation of the two actuators,

the control unit is configured to enable activation of an actuator not activated in a vehicle accident,

the control unit includes at least one circuit arrangement configured to enable the at least one output stage for controlling the at least two actuators, wherein the at least one circuit arrangement enables the at least one output stage for a predetermined first time period and for a predetermined second time period upon expiration of the predetermined first time period, and

the activation of the second time period is determined by a firing current of a primary stage, and

the control unit is configured to prevent each actuator already controlled from being conductively controlled again.

2. The safety system as recited in claim 1, further comprising:

at least one storage element configured to store information regarding control of the at least one output stage and the at least two actuators.

3. The safety system as recited in claim 2, wherein the at least one storage element includes a first register and a second register.

10. The method as recited in claim 3, wherein upon an initializing of the safety system, determining which actuators and output stages should be controlled again.

11. The method as recited in claim 1, wherein capacitors are used as a reserve energy source.

12. The method as recited in claim 1, wherein as soon as the control unit has recorded a current flowing through the at least one output stage within a first time period, the control unit relays a control signal to activate a second time period.

13. The method as recited in claim 1, further comprising a counter to set the predetermined first time period and predetermined second time period.

14. The method as recited in claim 3, wherein the first register is programmable and the second register stores for which of the at least one output stage a second time period is already requested and if a second time period is already requested, an additional time period is denied, thereby preventing each actuator already controlled from being conductively controlled again.

4. A method for controlling a safety system for vehicle occupants, wherein the safety system includes at least one sensor and at least two actuators operatively connected to a control unit, the method comprising:

providing a first specified enabling time interval, wherein at least one of the two actuators is enabled for activation during the first specified enabling time interval in a case of a vehicle accident; and

providing a second specified enabling time interval after expiration of the first specified enabling time interval;

wherein;

at least one actuator not activated during the first specified enabling time interval in the case of a vehicle accident is controlled by the control unit during the second specified enabling time interval,

the activation of the second time interval is determined by a firing current of a primary stage, and

the control unit is configured to prevent each actuator already controlled from being conductively controlled again.

5. The method as recited in claim 4, wherein the first specified enabling time interval is 32 ms.

6. The method as recited in claim 5, wherein the second specified enabling time interval is 256 ms.

7. The method as recited in claim 5, wherein the second specified enabling time interval is 512 ms.

8. The method as recited in claim 4, wherein information regarding an actuator which is to be controlled over a longer enabling time interval between the first and second specified enabling time intervals is stored in a first memory element.

9. The method as recited in claim 8, wherein information regarding an actuator which has been controlled over a longer enabling time interval between the first and second specified enabling time intervals is stored in a second memory element.

15. The method as recited in claim 4, wherein upon an initializing of the safety system, determining which actuators and output stages should be controlled again.

16. The method as recited in claim 4, wherein capacitors are used as a reserve energy source.

17. The method as recited in claim 4, wherein as soon as the control unit has recorded a current flowing through the at least one output stage within a first time interval, the control unit relays a control signal to activate the second time interval.

18. The method as recited in claim 4, further comprising a counter, wherein the counter sets the first time interval and the second time interval.

19. The method as recited in claim 9, wherein the second memory element stores for which of the at least one output stage a second time interval is already requested and if a second time interval is already requested, an additional time period is denied, thereby preventing each actuator already controlled from being conductively controlled again.