Apparatus and method for enhancing performance of an occupant restraint system in a vehicle

• US 5,605,202 A
• Filed: 06/07/1995
• Issued: 02/25/1997
• Est. Priority Date: 06/07/1995
• Status: Expired due to Term

• Current Assignee: ITT Automotive, Incorporated
• Original Assignee: ITT Automotive, Incorporated
• Inventors: Dixon, Scott M.
• Primary Examiner(s): Johnson, Brian L.
• Assistant Examiner(s): English, Peter C.
• Application Number:
  US08/476,663
• Time in Patent Office: 629 Days
• Field of Search: 180/268, 180/271, 180/274, 180/282, 280/735, 280/734, 280/806, 280/807
• US Class Current: 180/268
• CPC Class Codes: B60R 2021/01311 monitoring the braking system, e.g. ABS
• CPC Class Codes: B60R 2021/01313 monitoring the vehicle steering system or the dynamic control system
• CPC Class Codes: B60R 2022/4473 using an electric retraction device combined with a spring B60R2022/444, B60R2022/4466
• CPC Class Codes: B60R 2022/4666 characterised by electric actuators
• CPC Class Codes: B60R 21/01 Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents electrical circuits for transmission of signals between steering wheel and the vehicle itself B60R16/027; for electrically actuating belt retractor locking means B60R22/343
• CPC Class Codes: B60R 22/343 with electrically actuated locking means B60R22/3405 takes precedence
• CPC Class Codes: B60R 22/46 Reels with means to tension the belt in an emergency by forced winding upelectrical circuits for triggering safety arrangements B60R21/01 ; tensioners using reels only guiding the belt during normal use, e.g. splitted reels B60R22/195
• CPC Class Codes: B60R 22/4619 Transmission of tensioning power by cable, e.g. using a clutch on reel side
• CPC Class Codes: B60T 8/32 responsive to a speed condition, e.g. acceleration or deceleration using electrical circuitry or regulation means B60T8/17 ; B60T8/28 takes precedence; electric devices on electrically propelled vehicles indicating the wheel slip B60L3/10; measuring linear or angular speed per se G01P3/00

Abstract

An apparatus enhances performance of an occupant restraint system of a vehicle. A signal is generated based on vehicle dynamics and selectively places at least one safety module in a heightened state of awareness in response to the signal. The vehicle dynamics can include at least one parameter based on wheel movement. The parameter based on wheel movement can be provided by an anti-lock brake control system and/or a traction control system, or the like. The safety module capable of being placed in a heightened state of awareness can include a three-point seatbelt, an airbag, a pyrotechnic buckle pretensioner and/or an electro-mechanical retractor pretensioner or the like.

Claims

1. In an occupant restraint system for a vehicle having at least one sensor for sensing a state of at least one accident avoidance system, and control means for periodically performing a diagnostic subroutine function with respect to at least one crash sensor, the improvement comprising:

means for generating a signal based on vehicle dynamics corresponding to said sensed state by said at least one accident avoidance system sensor; and

safety means for selectively placing at least one safety module in a heightened state of awareness in response to said signal, wherein said heightened state of awareness includes temporarily suspending periodic performance of said diagnostic subroutine function by said control means.

2. The apparatus of claim 1 further comprising:

said vehicle dynamics including at least one parameter of wheel movement.

3. The apparatus of claim 2 further comprising said at least one parameter of wheel movement provided by at least one system selected from the group consisting of an anti-lock brake control system and a traction control system.

4. The apparatus of claim 1 further comprising:

wheel control means for controlling wheel movement independent of one another, said wheel control means including said signal generating means based on vehicle dynamics.

5. The apparatus of claim 1 further comprising:

said at least one safety module selected from the group consisting of a three-point seat belt, an air bag, a pyrotechnic buckle pretensioner and a retractor pretensioner.

6. In an occupant restraint system for a vehicle having at least one sensor for sensing a state of at least one accident avoidance system, and control means for periodically performing a diagnostic subroutine function with respect to at least one crash sensor, the improvement comprising:

means for generating a signal based on vehicle dynamics including at least one parameter of wheel movement corresponding to said sensed state by said at least one accident avoidance system sensor; and

safety means for selectively placing at least one safety module in a heightened state of awareness in response to said signal based on at least one parameter of wheel movement, wherein said heightened state of awareness includes temporarily suspending periodic performance of said diagnostic subroutine function by said control means.

7. The apparatus of claim 6 further comprising:

said signal generating means including an anti-lock brake control system.

8. The apparatus of claim 6 further comprising:

said signal generating means including a traction control system.

9. The apparatus of claim 6 further comprising:

wheel control means for controlling wheel movement independently of one another, said wheel control means including said signal generating means based on vehicle dynamics.

10. The apparatus of claim 6 further comprising:

said at least one safety module selected from the group consisting of a three-point seat belt, an air bag, a pyrotechnic buckle pretensioner and a retractor pretensioner.

11. In a method for enhancing performance of an occupant restraint system for a vehicle having at least one sensor for sensing a state of at least one accident avoidance system, and control means for periodically performing a diagnostic subroutine function with respect to at least one crash sensor, the improvement comprising the steps of:

generating a signal based on vehicle dynamics corresponding to said sensed state by said at least one accident avoidance system sensor; and

in response to said signal, selectively placing at least one safety module in a heightened state of awareness with safety means, wherein said heightened state of awareness includes temporarily suspending periodic performance of said diagnostic subroutine function by said control means.

12. The method of claim 11 wherein said signal generating step further comprises:

said vehicle dynamics including at least one parameter of wheel movement.

13. The method of claim 11 wherein said signal generating step further comprises:

said at least one accident avoidance system including at least one system selected from the group consisting of an anti-lock brake control system and a traction control system.

14. The method of claim 11 further comprising the step of:

controlling wheel movement with wheel control means to provide at least one system selected from the group consisting of an anti-lock brake control system and a traction control system.

15. The method of claim 14 further comprising the steps of:

determining vehicle stability based on said vehicle dynamics;

comparing vehicle stability with a predetermined vehicle stability threshold;

if said vehicle stability is within said predetermined threshold, returning to the determining step;

if said vehicle stability is beyond said predetermined threshold, performing said generating step to generate said signal to alert said at least one safety module.

16. The method of claim 15 further comprising the steps of:

if said vehicle stability is beyond said predetermined threshold, monitoring vehicle stability status;

comparing vehicle stability status to said predetermined vehicle stability threshold;

if said vehicle stability status is beyond said predetermined threshold, returning to the monitoring step; and

if said vehicle stability status is within said predetermined threshold, initializing to a normal operational state, wherein said heightened state of awareness is terminated and the periodic performance of said diagnostic subroutine function is restored, and returning to the determining step.

17. The method of claim 16 further comprising the steps of:

in response to said signal, activating a web retractor safety module;

monitoring motor resistance of the retractor;

comparing said monitored motor resistance to a predetermined motor resistance;

based on said comparing step, if said predetermined motor resistance is greater than said monitored motor resistance, continuing to activate said web retractor safety module; and

based on said comparing step, if said monitored motor resistance is at least as great as said predetermined motor resistance, completing web retractor safety module readiness and discontinuing activation of said web retractor safety module.

18. In an occupant restraint system for a vehicle having at least one sensor for sensing a state of at least one accident avoidance system and control means for periodically performing a diagnostic subroutine function with respect to at least one crash sensor, the improvement comprising:

signal means for generating a signal corresponding to a sensed state of said at least one sensor of said at least one accident avoidance system; and

means responsive to said signal for temporarily suspending said diagnostic subroutine function of said control means for providing an increased rate of monitoring of said at least one sensor, for enhancing performance of said occupant restraint system, and for defining a heightened state of awareness of said occupant restraint system.

19. The improvement of claim 18 wherein:

said at least one accident avoidance system including at least one system selected from the group consisting of an anti-lock brake control system and a traction control system.

20. The improvement of claim 18 said occupant restraint system further comprising:

at least one safety module selected from the group consisting of a three-point seat belt, an air bag, a pyrotechnic buckle pretensioner and a retractor pretensioner.