Bumper Arrangement for the Front Region of a Passenger Car

• US 20190308577A1
• Filed: 06/21/2019
• Published: 10/10/2019
• Est. Priority Date: 12/22/2016
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: FICHTINGER, Gerhard, GROSS, Martin, NOVINE, Mazdak, RUDOLPH, Tim
• Granted Patent: US 11,052,844 B2
• Time in Patent Office: Days
• CPC Class Codes: B60R 19/12 vertically spaced
• CPC Class Codes: B60R 19/18 characterised by the cross-section; Means within the bumper to absorb impact
• CPC Class Codes: B60R 2019/186 Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
• CPC Class Codes: B60R 21/34 Protecting non-occupants of a vehicle, e.g. pedestrians B60R19/02 takes precedence

Abstract

A bumper arrangement of a passenger car has an upper and a lower load path. A spring element is provided on the transverse support of the lower load path, which, in the event of a collision of a pedestrian with the passenger car, exerts an additional force on the lower leg of the pedestrian, so as to support the movement of the pedestrian in the direction of the front hood of the passenger car.

Claims

1. A bumper arrangement for a front region of a passenger car, comprising:

an upper load path having upper longitudinal members and an upper crossmember;

a lower load path having lower longitudinal members and a lower crossmember; and

at least one spring element arranged on a front side of the lower crossmember over at least a portion of a widthwise extent of the lower crossmember.

2. The bumper arrangement according to claim 1, wherein

the spring element is provided substantially over the entire widthwise extent of the lower crossmember.

3. The bumper arrangement according to claim 2, wherein

a spring stiffness of the spring element is at least regionally different over the widthwise extent of the lower crossmember.

4. The bumper arrangement according to claim 1, wherein

the spring element is formed in a wavy manner in a cross section defined approximately in an X-Z plane of the passenger car.

5. The bumper arrangement according to claim 4, wherein

the spring element exhibits substantially a complete wave with a profile similar to a sine curve.

6. The bumper arrangement according to claim 1, wherein

the spring element has at least one stiffening element oriented approximately in a direction of travel of the passenger car.

7. The bumper arrangement according to claim 6, wherein

the at least one stiffening element is formed in a two-dimensional manner, extends approximately in an X-Z plane of the passenger car, and is inserted in a wave arc of the spring element.

8. The bumper arrangement according to claim 1, wherein

the spring element is arranged on the lower crossmember in a pretensioned state, and

a device is provided that releases the pretension of the spring element in the event of a collision, such that the spring element generates a force directed in the direction of travel.

9. The bumper arrangement according to claim 8, wherein

the device has a portion that is in a form fit with the crossmember when the spring element is pretensioned, and

in the event of a force acting counter to the direction of travel, the form fit is undone and the spring element releases the pretension.

10. A passenger car comprising a bumper arrangement according to claim 1.

11. The passenger car according to 10, wherein

the spring element is provided substantially over the entire widthwise extent of the lower crossmember.

12. The passenger car according to 11, wherein

a spring stiffness of the spring element is at least regionally different over the widthwise extent of the lower crossmember.

13. The passenger car according to 10, wherein

the spring element is formed in a wavy manner in a cross section defined approximately in an X-Z plane of the passenger car.

14. The passenger car according to 13, wherein

the spring element exhibits substantially a complete wave with a profile similar to a sine curve.

15. The passenger car according to 10, wherein

the spring element has at least one stiffening element oriented approximately in a direction of travel of the passenger car.

16. The passenger car according to 15, wherein

the at least one stiffening element is formed in a two-dimensional manner, extends approximately in an X-Z plane of the passenger car, and is inserted in a wave arc of the spring element.

17. The passenger car according to 10, wherein

the spring element is arranged on the lower crossmember in a pretensioned state, and

a device is provided that releases the pretension of the spring element in the event of a collision, such that the spring element generates a force directed in the direction of travel.

18. The passenger car according to 17, wherein

the device has a portion that is in a form fit with the crossmember when the spring element is pretensioned, and

in the event of a force acting counter to the direction of travel, the form fit is undone and the spring element releases the pretension.