Vehicle collision damage reduction system

• US 20020188393A1
• Filed: 07/08/2002
• Published: 12/12/2002
• Est. Priority Date: 08/04/1999
• Status: Active Grant

• Current Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Aoki, Hiroshi, Fujii, Hiroaki, Yanagi, Eiji, Yokota, Keishi, Ato, Tadayuki
• Granted Patent: US 6,574,540 B2
• Time in Patent Office: Days
• US Class Current: 701/45
• CPC Class Codes: B60N 2/2821 having a seat and a base part
• CPC Class Codes: B60N 2/286 forward facing B60N2/2866 takes precedence
• CPC Class Codes: B60N 2/2863 backward facing
• CPC Class Codes: B60N 2/2884 with protection systems against abnormal g-forces
• CPC Class Codes: B60N 2/4214 longitudinal
• CPC Class Codes: B60N 2/4221 due to impact coming from the front
• CPC Class Codes: B60N 2/42745 of the back-rest B60N2/433 takes precedence; higher part of the back-rest moving together with the headrest B60N2/888
• CPC Class Codes: B60N 2/4279 electric or electronic triggering
• CPC Class Codes: B60R 19/00 Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions reinforcement elements for side doors B60J5/0412; mudguards B62D
• CPC Class Codes: B60R 2019/007 Means for adjusting or regulating the crash absorption capacity of the vehicle, e.g. when detecting an impending collision
• CPC Class Codes: B60R 2021/0023 Offset collision
• CPC Class Codes: B60R 2021/01027 Safing sensors
• CPC Class Codes: B60R 21/0132 responsive to vehicle motion parameters , e.g. to vehicle longitudinal or transversal deceleration or speed value
• CPC Class Codes: B60R 21/0134 responsive to imminent contact with an obstacle , e.g. using radar systems
• CPC Class Codes: B60R 21/01512 Passenger detection systems
• CPC Class Codes: B60R 21/01548 sensing the amount of belt winded on retractor
• CPC Class Codes: B60R 21/01554 Seat position sensors
• CPC Class Codes: B60R 21/01556 Child-seat detection systems

Abstract

A vehicle collision damage reduction system is provided. The system works by detecting the relative speed between the vehicle and an object, such as another vehicle. A danger level is calculated based on parameters such as speed and distance to the object; the danger level could be at an “emergency level” or at some lower level. Based on the danger level, different corrective measures and the degree of the corrective measures can be adjusted to attempt to minimize occupant injury. For example, the airbag can be adjusted to better protect the occupant, a pre-tensioner can be activated at a certain level, and the inclination of a child restraint seat may be adjusted as well.

Claims

1. A vehicle collision damage reduction system comprising:

means for sequentially detecting distance information to an object to be impacted moving relatively;

means for determining a collision danger level using the distance information;

means for absorbing collision energy in a vehicle structure formed to support part of the vehicle structure and absorbing collision energy applied thereto in a collision; and

means for controlling the collision absorbing energy means by outputting an operational command, before the collision, on the basis of either the object detecting means or the collision danger level means.

2. The system of claim 1, wherein the collision energy absorbing means is an airbag for at least a portion of the vehicle structure, the airbag being inflatable, before a collision, by an operational command from the controlling means and deforming so as to absorb collision energy applied thereto when the vehicle structure deforms at the collision.

3. The system of claim 2, wherein the expansion rate or the energy absorbing amount of the airbag is adjustable in response to the collision danger level.

4. A vehicle collision damage reduction system comprising:

an object detector for detecting distance information to an object to be impacted by the vehicle;

an electronic control unit for using the distance information and speed information of at least the speed of the vehicle to determine a collision danger level;

an airbag positioned to support a portion of the vehicle structure for absorbing collision energy applied thereto in a collision, the airbag being inflatable in response to a signal from the electronic control unit.

5. The system of claim 4, wherein the object detector sequentially detects distance information to an object to be impacted moving relatively.

6. The system of claim 4, wherein the airbag is positioned to absorb the impact energy applied to the vehicle in a substantially head on collision.

7. The system of claim 4, wherein the airbag is position to support part of the energy absorbing structure of the crushable zone of a vehicle structure.

8. The system of claim 4, wherein the airbag is accommodated in a case that also absorbs a part of the collision energy.

9. The system of claim 4 wherein the expansion rate or the energy absorbing amount of the airbag for vehicle structure is changed in stages in response to the collision danger level of the collision predicting information obtained from the collision danger level determining means.

10. A vehicle collision damage reduction system comprising:

means for sequentially detecting distance information to an object to be impacted moving relatively;

means for determining a collision danger level using the distance information;

means for absorbing at least a portion of the collision energy to which a vehicle occupant is exposed to in a secondary collision following a vehicle collision; and

,

means for controlling the collision absorbing energy means by outputting an operational command, before the collision, on the basis of either the object detecting means or the collision danger level means.

11. The system of claim 10, wherein the collision energy absorbing means for a vehicle occupant is a mechanism for shortening the steering column at least in part in the axial direction, so as to increase the distance between the occupant and the steering column or a shaft.

12. The system of claim 11, wherein the shortening mechanism is introduced as part of the steering column.

13. The system of claim 11, wherein load characteristics of the shortening mechanism are adjustable in stages in response to the collision danger level.

14. The system of claim 10, further comprising occupant seating information detecting means for detecting the physique and a seating state of an occupant, and wherein an operational amount of the collision energy absorbing means for a vehicle occupant is established by an operational command based on the physique and seating state information.

16. The system of claim 15, wherein load characteristics of the shortening mechanism are adjustable in stages in response to the collision danger level.

17. The system of claim 15, wherein the distance between the occupant and the steering shaft or a shaft is adjustable in stages in response to the collision danger level.

18. The system of claim 15, further comprising occupant seating information detecting means for detecting physique and a seating state of an occupant, and wherein the length of the steering wheel column is established by the operational command on the basis of the physique and seating state information.

20. The system of claim 19, wherein the seat adjustment amount of the seat adjusting mechanism is changed in stages, before a collision, in response to the collision danger level.

21. The system of claim 19, further comprising occupant seating information detecting means for detecting the physique and a seating state of an occupant seated in a seat and outputting the seating information to the controlling means, wherein the seat adjustment amount is established, before a collision, on the basis of the physique and seating state information.

15. A vehicle collision damage reduction system comprising:

an object detector for sequentially detecting distance information to an object to be impacted moving relatively;

a mechanism capable of shortening a steering column at least in part in its axial direction, so as to increase the distance between the occupant and the steering column or a shaft; and

,

an electronic control unit for determining a collision danger level using the distance information and for outputting an operational command in response to the collision danger level to adjust the axial length of the steering wheel column.

19. A vehicle collision damage reduction system comprising:

means for sequentially detecting distance information to an object to be impacted moving relatively;

means for determining a collision danger level using the distance information;

a seat adjusting mechanism capable of adjusting seat sliding, reclining, and seat height of a seat independently or simultaneously; and

,

means for controlling the seat adjusting mechanism by outputting an operational command, before the collision, on the basis of either the object detecting means or the collision danger level means.

22. A vehicle collision damage reduction system comprising

an object detector for sequentially detecting distance information to an object to be impacted and moving relatively;

a detector for detecting the physique and a seating state of an occupant;

a seat adjustment mechanism capable of adjusting seat sliding, reclining, and seat height of a seat independently or simultaneously; and

,

an electronic control unit for determining a collision danger level using the distance information and for outputting an operational command to the seat adjustment mechanism.

23. The system of claim 22, wherein the seat adjustment mechanism is adjustable in stages, before a collision, in response to the collision danger level.

25. The system of claim 24, wherein the webbing taking-up amount of the seatbelt pre-tensioner is changed in stages, before a collision, in response to the danger level of the collision predicting information obtained from the collision danger level determining means.

26. The system of claim 24, further comprising occupant seating information detecting means for detecting the physique and a seating state of an occupant so as to output the seating information to the controlling means and wherein the webbing retraction amount of the seatbelt pre-tensioner is established on the basis of the physique and the seating state information.

28. The system of claim 27, wherein the webbing taking-up amount of the seatbelt pre-tensioner is capable of being adjusted in predetermined amounts, before a collision, in response to the danger level of the collision predicting information obtained from the collision danger level determining means.

29. The system of claim 27, further comprising an occupant seating detector for detecting the physique and a seating state of an occupant seated in a seat and to provide this information to the electronic control unit and wherein the webbing retraction amount of the seatbelt pre-tensioner is established on the basis of the physique and the seating state information.

24. A vehicle collision damage reduction system comprising:

means for sequentially detecting distance information to an object to be impacted moving relatively;

means for determining a collision danger level using the distance information;

a seatbelt pre-tensioner for a seatbelt take-up device of a seat; and

means for controlling the pre-tensioner by outputting an operational command, before the collision, on the basis of either the object detecting means or the collision danger level means, wherein the operational command controls webbing retraction.

27. A vehicle collision damage reduction system comprising:

an object detector for sequentially detecting distance information to an object to be impacted moving relatively;

a seatbelt pre-tensioner for a seatbelt take-up device of a seat;

an electronic control unit for determining a collision danger using the distance information and for outputting an operational command of webbing retraction to the seatbelt pre-tensioner on the basis of the collision danger level.

30. A vehicle collision damage reduction system comprising:

means for sequentially detecting distance information to an object to be impacted moving relatively;

means for determining a collision danger level using the distance information;

a child seat installed on a seat and capable of being adjusted at different reclining angles; and

,

means for controlling the adjustment amount of the reclining angle of the child seat on the basis of either the object detecting means or the collision danger level means.

31. The system of claim 30, wherein the adjustment amount of the reclining angle of the child seat is changed in stages, before a collision, in response to the collision danger level.

32. The system of claim 30, further comprising occupant seating information detecting means for detecting the child seat placed on a seat and for outputting the detection information to the controlling means.

33. A vehicle collision damage reduction system comprising:

an object detector that sequentially detects distance information to an object to be impacted moving relatively;

a child seat installed on a seat and capable of being adjusted at different reclining angles; and

,

an electronic control means for calculating a collision danger using the distance information and for outputting an operational command of a predetermined adjustment amount of the reclining angle to the child seat on the basis of the collision danger level.

34. The system of claim 33, wherein the adjustment amount of the reclining angle of the child seat is changed in stages, before a collision, in response to the collision danger level.

35. The system of claim 33, further comprising a detector for detecting the child seat placed on a seat and for outputting the seating information to the electronic control unit.

36. A vehicle collision damage reduction system comprising:

an object detector for sequentially detecting distance information to an object to be impacted moving relatively; and

,

an electronic control unit means for determining a collision danger level using the distance information and for outputting an operational command, before the collision, to activate a safety device in response to the collision danger level.