Vehicle-body front structure of vehicle

Patent metadata

Field	Value
Publication number	US-9327675-B2
Application number	US-201414454413-A
Country	US
Kind code	B2
Filing date	Aug 7, 2014
Priority date	Aug 21, 2013
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A pair of right-and-left brackets which extend obliquely downward and forward from respective front portions of a pair of right-and-left side frames are provided. A stiffener which extends in a vehicle width direction below a bumper beam is attached to respective front ends of the pair of right-and-left brackets. The stiffener is configured such that its front end portion slants downward and forward and has an open cross section, and its rear end portion thereof has a closed cross section. An obstacle can be prevented from coming in below a vehicle-body front portion, and also the sufficient energy absorption in a collision and the prompt flicking-up of an obstacle can properly achieved.

First claim

What is claimed is:

1. A vehicle-body front structure of a vehicle, comprising:
a pair of right-and-left side frames extending longitudinally at a vehicle-body front portion;
a bumper beam extending in a vehicle width direction and attached to respective front ends of the pair of right-and-left side frames;
a pair of right-and-left brackets attached to respective front portions of the pair of right-and-left side frames and extending obliquely downward and forward from respective front portions of the pair of right-and-left side frames; and
a stiffener extending in the vehicle width direction below the bumper beam and attached to respective front ends of the pair of right-and-left brackets,
wherein said stiffener is configured such that a front end portion thereof slants downward and forward and has an open cross section, and a rear end portion thereof has a closed cross section extending in the vehicle width direction, and
said rear end portion of the stiffener is configured such that a longitudinal width of the closed cross section is the greatest at a central portion, in the vehicle width direction, of the stiffener and decreases gradually toward outward both ends, in the vehicle width direction, of the stiffener.

2. The vehicle-body front structure of a vehicle of claim 1 , wherein a portion of said stiffener around an attachment portion of the stiffener to said bracket has an open cross section over an entire longitudinal length thereof.

3. The vehicle-body front structure of a vehicle of claim 2 , wherein said brackets are configured such that a rear-end side portion thereof is wider than a front-end side portion thereof in a side view.

4. The vehicle-body front structure of a vehicle of claim 3 , wherein an energy absorbing member extending in the vehicle width direction is attached to a front face of said bumper beam, and a front end of an engine hood or a front end of a front vehicle-body exterior member which is substantially flatly continuous from the front end of the engine hood is positioned in front of the energy absorbing member.

5. The vehicle-body front structure of a vehicle of claim 2 , wherein an energy absorbing member extending in the vehicle width direction is attached to a front face of said bumper beam, and a front end of an engine hood or a front end of a front vehicle-body exterior member which is substantially flatly continuous from the front end of the engine hood is positioned in front of the energy absorbing member.

6. The vehicle-body front structure of a vehicle of claim 1 , wherein said brackets are configured such that a rear-end side portion thereof is wider than a front-end side portion thereof in a side view.

7. The vehicle-body front structure of a vehicle of claim 1 , wherein an energy absorbing member extending in the vehicle width direction is attached to a front face of said bumper beam, and a front end of an engine hood or a front end of a front vehicle-body exterior member which is substantially flatly continuous from the front end of the engine hood is positioned in front of the energy absorbing member.

Assignees

• Mazda Motor

Inventors

• Kito Masatoki
• Sogabe Hiroshi
• Takada Hirofumi
• Watanabe Tsutomu
• Furumoto Arihiro
• Murakami Ryuma
• Nakamae Takayuki

Classifications

• B60R21/34 Primary

  Protecting non-occupants of a vehicle, e.g. pedestrians {(B60R19/02 takes precedence)} · CPC title

• B60R2021/343

  using deformable body panel, bodywork or components · CPC title

• B60R2021/002

  Underrun collision · CPC title

• B62D25/08

  Front or rear portions {(sub-frames for mounting engine or suspensions B62D21/11)} · CPC title

• B60R19/12 Primary

  vertically spaced · CPC title