Vehicle crush rail with substantially square cells and initiators

1. A vehicle crush rail comprising:

a body configured to be at least partially crushed along an axis between first and second ends thereof, the body having a cross section profile that comprises first, second and third cells that are substantially square, wherein at least one of the first, second and third cells extends from the first end to the second end, wherein the first, second and third cells have respective initiators arranged according to a crush pattern for the crush rail.

2. The vehicle crush rail of claim 1 , wherein the initiators comprise indentations in the body.

3. The vehicle crush rail of claim 2 , wherein at least one of the indentations has two parallel edges joined by rounded portions.

4. The vehicle crush rail of claim 2 , wherein at least one of the indentations is located on an outer surface of the body.

5. The vehicle crush rail of claim 2 , wherein at least one of the indentations comprises a swage.

6. The vehicle crush rail of claim 1 , wherein at least some of the initiators are staggered relative to each other.

7. The vehicle crush rail of claim 6 , wherein the crush pattern extends over respective faces of the cells, and wherein the staggering comprises that initiators on adjacent faces are staggered along the axis.

8. The vehicle crush rail of claim 7 , wherein:

the cross section profile comprises the first, second and third cells positioned in a row;

the first cell has first initiators on opposite faces thereof and a second initiator on a face between the opposite faces thereof, the first initiators adjacent the first end and the second initiator spaced from the first end;

the second cell has third initiators on opposite faces thereof, the third initiators spaced from the first end; and

the third cell has fourth initiators on opposite faces thereof and a fifth initiator on a face between the opposite faces thereof, the fourth initiators adjacent the first end and the fifth initiator spaced from the first end.

9. The vehicle crush rail of claim 1 , mounted at a front end of a vehicle.

10. The vehicle crush rail of claim 9 , wherein the front end has a bumper system mounted to at least two vehicle crush rails.

11. The vehicle crush rail of claim 10 , wherein the bumper system is mounted to end plates on the respective vehicle crush rails, wherein the end plates allow the bumper system to be positioned at a specified height above a driving surface.

12. The vehicle crush rail of claim 9 , mounted in an upright position at the front end and having an opening through which a drive shaft passes.

13. The vehicle crush rail of claim 9 , configured to hold a vehicle subframe.

14. The vehicle crush rail of claim 1 , wherein the body comprises an aluminum extrusion.

15. The vehicle crush rail of claim 1 , wherein the cross section profile comprises the first, second and third cells positioned in a row.

16. The vehicle crush rail of claim 1 , wherein the crush pattern comprises a common deformation mode throughout the length of the vehicle crush rail.

17. The vehicle crush rail of claim 16 , wherein the deformation mode comprises alternating portions of inward deformations and outward deformations in the body.

18. The vehicle crush rail of claim 17 , wherein the inward deformations and outward deformations appear in crush sections, a first crush section having, on each side of the vehicle crush rail, two inward deformations and one outward deformation therebetween, and a second crush section adjacent the first crush section having, on each side of the vehicle crush rail, two outward deformations and one inward deformation therebetween.