Motor vehicle rear end

Patent metadata

Field	Value
Publication number	US-9561823-B2
Application number	US-201514681275-A
Country	US
Kind code	B2
Filing date	Apr 8, 2015
Priority date	Apr 11, 2014
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A motor vehicle rear end has left and right longitudinal beams ( 12, 14 ) forming load-bearing structures of the vehicle, and a receiving housing ( 18 ) is between the left and right longitudinal beams ( 12, 14 ) for accommodating a traction battery. The receiving housing ( 18 ) has left and right side walls ( 22, 24 ) and a central wall ( 26 ) running in a forward direction of travel. An impact profile ( 26 ) is connected to the longitudinal beams ( 12, 14 ) at the level of the receiving housing ( 18 ) and absorbs impact energy in the event of a rear-end crash. The impact profile ( 26 ) has a left and right predetermined buckling points ( 36, 38 ) that enable the impact profile ( 26 ) to buckle toward the receiving housing ( 18 ) in a rear-end crash. The impact profile ( 26 ) that buckles in a rear-end crash strikes the receiving housing ( 18 ) along the longitudinal extent of the central wall ( 25 ).

First claim

What is claimed is:

1. A motor vehicle rear end, comprising:
left and right longitudinal beams defining load-bearing structures of the motor vehicle;
a receiving housing arranged between the left and right longitudinal beams, the receiving housing having left and right side walls running substantially in a forward direction of travel, and at least one central wall between the left and right side walls and running substantially in the forward direction of travel;
an impact profile connected to the left and right longitudinal beams at a level of the receiving housing for absorbing impact energy in an event of a rear-end crash, the impact profile having a left and right predetermined buckling points configured to enable the impact profile to buckle toward the receiving housing in the event of a rear-end crash, wherein the impact profile that buckles in the event of a rear-end crash strikes the receiving housing along a longitudinal extent of the central wall; and
a deformation element between the central wall and the impact profile along the longitudinal extent of the central wall, wherein at least one of the impact profile and the deformation element is in the form of a chamber profile with multiple chambers formed by substantially vertically running channels.

2. The motor vehicle rear end of claim 1 , wherein the deformation element has a force introduction surface area A E pointing toward the impact profile and has a force exit surface area A A pointing toward the central wall, wherein 1.5≦A E /A A ≦5.0.

3. A motor vehicle rear end of claim 1 , comprising:
left and right longitudinal beams defining load-bearing structures of the motor vehicle;
a receiving housing arranged between the left and right longitudinal beams, the receiving housing having left and right side walls running substantially in a forward direction of travel, and at least one central wall between the left and right side walls and running substantially in the forward direction of travel; and
an impact profile connected to the left and right longitudinal beams at a level of the receiving housing for absorbing impact energy in an event of a rear-end crash, the impact profile having a left and right predetermined buckling points configured to enable the impact profile to buckle toward the receiving housing in the event of a rear-end crash, wherein the impact profile that buckles in the event of a rear-end crash strikes the receiving housing along a longitudinal extent of the central wall; and wherein the receiving housing further comprises
a rear wall having opposite left and right ends, left and right protective brackets connected to deformable lugs that are inserted into hollow chambers provided respectively on left and right ends of the rear wall, the left and right protective brackets connecting the rear wall to the left and right side walls respectively, the lugs of the left protective bracket being between the left side wall and the impact profile, and the lug of the right protective bracket being between the right side wall and the impact profile.

4. The motor vehicle rear end of claim 3 , wherein the left and right predetermined buckling points are spaced apart in opposite horizontal transverse directions from the central wall by substantially equal distances.

5. The motor vehicle rear end of claim 3 , further comprising a deformation element between the central wall and the impact profile along the longitudinal extent of the central wall.

6. The motor vehicle rear end of claim 3 , wherein each of the lugs is a bent-over tab of substantially U-shaped configuration.

7. A motor vehicle rear end, comprising:
left and right longitudinal beams defining load-bearing structures of the motor vehicle;
a receiving housing arranged between the left and right longitudinal beams, the receiving housing having left and right side walls running substantially in a forward direction of travel, and at least one central wall between the left and right side walls and running substantially in the forward direction of travel; and
an impact profile connected to the left and right longitudinal beams at a level of the receiving housing for absorbing impact energy in an event of a rear-end crash, the impact profile having a left and right predetermined buckling points configured to enable the impact profile to buckle toward the receiving housing in the event of a rear-end crash, the left and right predetermined buckling points being spaced apart in opposite horizontal transverse directions from the central wall by substantially equal distances;
a deformation element between the central wall and the impact profile along the longitudinal extent of the central wall, the deformation element having a force introduction surface area A E pointing toward the impact profile and having a force exit surface area A A pointing toward the central wall, wherein 1.5≦A E /AA≦5.0, wherein the impact profile that buckles in the event of a rear-end crash strikes the receiving housing along a longitudinal extent of the central wall.

8. The motor vehicle rear end of claim 7 , wherein at least one of the impact profile and the deformation element is in the form of an extruded profile.

9. The motor vehicle rear end of claim 7 , wherein the impact profile has a profile that is arcuately convex counter to the forward direction of travel.

10. The motor vehicle rear end of claim 1 , wherein the receiving housing is inserted into a receiving depression formed by a motor vehicle body.

Assignees

• Porsche Ag
• Porsche Ag

Inventors

• Eberle Wilfried
• Klamser Herbert
• Wierschem Franz-Rudolf
• Hekmann Gerald
• Haag Daniel

Classifications

• B62D21/152 Primary

  Front or rear frames · CPC title

• B62D25/087

  Luggage compartments · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title

• B60Y2306/01

  Reducing damages in case of crash, e.g. by improving battery protection · CPC title

• B60K2001/0416

  Arrangement in the rear part of the vehicle · CPC title