Adaptive variable load limited for primary occupant safety restraint

• US 6,659,505 B1
• Filed: 01/12/2000
• Issued: 12/09/2003
• Est. Priority Date: 01/12/2000
• Status: Expired due to Fees

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Knox, Matthew J.
• Primary Examiner(s): CULBRETH, ERIC D
• Application Number:
  US09/481,149
• Time in Patent Office: 1,427 Days
• Field of Search: 280/801.1, 280/803, 280/805, 280/806, 280/807, 280/808, 180/268, 297/470, 297/475, 297/476, 297/477, 297/478, 297/479, 297/480, 242/379.1, 242/381, 242/390.5, 242/390.6
• US Class Current: 280/806
• CPC Class Codes: B60R 2022/282 using fluids or vico-elastic materials
• CPC Class Codes: B60R 2022/288 with means to adjust or regulate the amount of energy to be absorbed
• CPC Class Codes: B60R 21/013 including means for detecting collisions, impending collisions or roll-over
• CPC Class Codes: B60R 21/01512 Passenger detection systems
• CPC Class Codes: B60R 21/01546 using belt buckle sensors
• CPC Class Codes: B60R 21/01548 sensing the amount of belt winded on retractor
• CPC Class Codes: B60R 22/3413 operating between belt reel and retractor frame B60R22/4676 takes precedence

Abstract

A system and device for managing the restraints available for vehicle occupants that uses fluidic torque conversion to provide an adaptive variable load limiting for the primary occupant safety restraint. The fluidic torque conversion of this invention can be variably controlled through the use of an electro/mechanical flow control device. The flow control is preferably coupled to one or more sensors, including occupant weight, occupant position, seat position, low “g”, high “g”, and belt displacement/latching sensors. This invention is adapted to be responsive to the vehicles interior safety devices, including front air bags, side air bags, seat back pivots, head rests, collapsible steering wheel, and positioning of the dash board and/or vehicle instrumentation. This invention is a re-usable system. This invention can be applied to any rotational, pivotal or telescoping safety mechanism or device and by using hydro load limiting and energy absorbing management contributes to reduced occupant chest, back, neck or leg injuries as a result of a vehicle impact event.

Claims

1. A vehicle safety system, comprising:

a seat belt retractor; and

a load limiter attached to the retractor, the load limiter configured to engage during a crash so as to selectively reduce the load on the retractor, the load limiter having a rotor drive coupled to a rotor, the rotor drive constructed such that during a crash, the rotor drive engages with the retractor and causes the rotor to reduce the load on the retractor by displacing a fluid through a valve, the load limiter further comprising a release mechanism on the rotor drive, the release mechanism configured to automatically reset the load limiter so that the vehicle safety system continues to function properly after the first use.

2. A vehicle safety system as in claim 1 wherein the vehicle safety system further comprises one or more sensors that communicate with the load limiter.

3. A vehicle safety system as in claim 2 where the one or more sensors are individually selected from the group consisting of a low “

g”

sensor, a high “

g”

sensor, an occupant position sensor, a seat belt latch sensor, a seat position sensor, an occupant weight sensor, and a belt displacement sensor.

4. A vehicle safety system as in claim 2 wherein the one or more sensors communicate with the load limiter through sensor extensions.

5. A vehicle safety system as in claim 1 wherein the load limiter comprises a fluidic torque converter.

6. A vehicle safety system as in claim 1 further comprising a control module.

7. A vehicle safety system, comprising:

a seat belt retractor; and

a load limiter attached to the retractor, the load limiter configured to engage during a crash so as to selectively reduce the load on the retractor, the load limiter having a rotor drive coupled to a rotor, the rotor drive constructed such that during a crash, the rotor drive engages with the retractor and causes the rotor to reduce the load on the retractor by displacing a fluid through a valve, the load limiter further comprising a return spring on the rotor drive, the return spring configured to automatically reset the load limiter so that the vehicle safety system continues to function properly after the first use.

8. A vehicle safety system as in claim 7 wherein the vehicle safety system further comprises one or more sensors that communicate with the load limiter.

9. A vehicle safety system as in claim 7 wherein the load limiter comprises a fluidic torque converter.

10. A vehicle safety system, comprising:

a seat belt retractor;

a load limiter attached to the retractor, the load limiter configured to engage during a crash so as to selectively reduce the load on the retractor, the load limiter having a rotor drive coupled to a rotor, the rotor drive constructed such that during a crash, the rotor drive engages with the retractor and causes the rotor to reduce the load on the retractor by displacing a fluid through a valve, the load limiter further comprising a release mechanism on the rotor drive, the release mechanism configured to automatically reset the load limiter so that the vehicle safety system continues to function properly after the first use;

a control module in communication with the load limiter, the control module configured to cause the load limiter to engage during a crash; and

one or more sensors communicating with the load limiter.

11. A vehicle safety system as in claim 10 wherein the one or more sensors are selected from the group consisting of a low “

g”

sensor, a high “

g”

sensor, an occupant position sensor, a seat belt latch sensor, a seat position sensor, an occupant weight sensor, and a belt displacement sensor.