Steering column/airbag tunable impact absorption system

• US 6,916,044 B2
• Filed: 07/08/2003
• Issued: 07/12/2005
• Est. Priority Date: 07/08/2003
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Daimler Chrysler Corporation (Mercedes-Benz Group AG)
• Inventors: Bannon, Sean A.
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): TO, TOAN C
• Application Number:
  US10/615,575
• Publication Number:
  US 20050006890A1
• Time in Patent Office: 735 Days
• Field of Search: 280/775, 280/777, 280/779, 744/93, 744/95
• US Class Current: 280/777
• CPC Class Codes: B60R 21/013 including means for detecting collisions, impending collisions or roll-over
• CPC Class Codes: B60R 21/01516 using force or pressure sensing means
• CPC Class Codes: B60R 21/01554 Seat position sensors
• CPC Class Codes: B60R 21/01558 monitoring crash strength
• CPC Class Codes: B62D 1/192 Yieldable or collapsible columns
• CPC Class Codes: B62D 1/195 Yieldable supports for the steering column

Abstract

An impact absorption system for a motor vehicle has a steering column with a first sleeve and a second sleeve. The first sleeve is sized to receive a portion of the second sleeve. The sleeves extend between a first mounting bracket and a second mounting bracket. A piston cylinder assembly is mounted between the first and second mounting brackets. A plurality of igniters is in communication with the piston cylinder assembly. The plurality of igniters, when activated, are capable of releasing a pressurized fluid to pressurize the piston cylinder assembly. A plurality of sensors are mounted within the motor vehicle for signaling the vehicle and driver conditions. A controller is in communication with the plurality of sensors and the plurality of igniters. The controller activates at least one of the plurality of igniters based on the signals from the plurality of sensors during an impact event.

Claims

1. A tunable impact absorption system for a motor vehicle comprising:

a steering column having a first sleeve and a second sleeve, the first sleeve sized to receive a portion of the second sleeve, the sleeves extending between a first mounting bracket and a second mounting bracket, and a piston cylinder assembly mounted between the first and second mounting brackets;

a plurality of igniters in communication with the piston cylinder assembly, the plurality of igniters capable of releasing a pressurized fluid when activated to pressurize the piston cylinder assembly;

a plurality of sensors mounted within the motor vehicle for signaling vehicle and driver conditions; and

a controller in communication with the plurality of sensors and the plurality of igniters, the controller activating at least one of the plurality of igniters based on signals received from the plurality of sensors during an impact event.

2. The tunable impact absorption system of claim 1 further comprising a collapsible steering shaft adapted to steer the motor vehicle and disposed within the first and second sleeves.

3. The tunable impact absorption system of claim 1, wherein the piston cylinder assembly is mounted within the first sleeve and the second sleeve.

4. The tunable impact absorption system of claim 1, further comprising a control volume for housing the plurality of igniters, the control volume in communication with the piston cylinder assembly.

5. The tunable impact absorption system of claim 1, further comprising an airbag deployment system having a plurality of igniters capable of releasing a pressurized fluid when activated to pressurize the airbag deployment system, the plurality of igniters activated by the controller during an impact event.

6. The tunable impact absorption system of claim 4, further comprising a pneumatic line extending between the control volume and the piston cylinder assembly for providing fluid communication between the control volume and the piston cylinder assembly.

7. The tunable impact absorption system of claim 6, further comprising a pressure release valve mounted between the control volume and the steering column along the pneumatic line.

8. The tunable impact absorption system of claim 1, wherein the plurality of sensors include a driver height sensor, a driver weight sensor, a chest to wheel sensor, a seat position sensor, a seat belt sensor, a vehicle speed sensor, and an impact sensor.