Front vehicle-body structure of vehicle
A front vehicle-body structure is provided that allows for lower deceleration for occupants by facilitating breakage of frame members in the event of an oblique collision. Embodiments include a suspension housing formed with a suspension damper supporting portion, an upper arm supporting portion, and a lower arm supporting portion. A first frame connects an upper portion of the suspension housing and an upper portion on a vehicle-width-direction inner side of a dash panel, a second frame connects the upper portion of the suspension housing and an upper portion of a hinge pillar, and a third frame connects a lower portion of the suspension housing and a lower portion on the vehicle-width-direction inner side of the dash panel. In the event of an oblique collision, the first frame and the second frame break inward in vehicle plan view, and the third frame breaks in a Z-shape in vehicle plan view.
1. A front vehicle-body structure of a vehicle including a suspension housing with a suspension damper supporting portion, an upper arm supporting portion, and a lower arm supporting portion, the front vehicle-body structure comprising:
a first frame connecting an upper portion of the suspension housing and an upper portion on a vehicle-width-direction inner side of a dash panel;
a second frame connecting the upper portion of the suspension housing and an upper portion of a hinge pillar; and
a third frame connecting a lower portion of the suspension housing and a lower portion on the vehicle-width-direction inner side of the dash panel, wherein
in an event of an oblique collision, the first frame and the second frame are facilitated to break inward in vehicle plan view, and the third frame is facilitated to break in a Z-shape in vehicle plan view, and
the second frame has a curved shape bulging toward an outside in a vehicle width direction so that a rear portion of the second frame breaks outward.
2. The front vehicle-body structure of the vehicle according to claim 1 , wherein
each of the first frame and the second frame have a breakage facilitating bead extending in a vertical direction on a vehicle-width-direction outer-side portion thereof.
3. The front vehicle-body structure of the vehicle according to claim 2 , wherein
the third frame has breakage facilitating beads extending in a vertical direction on vehicle-width-direction inner and outer side portions of the third frame at positions offset from each other in a vehicle front-rear direction.
4. The front vehicle-body structure of the vehicle according to claim 3 , further comprising another frame connecting the suspension housing and a vehicle cabin structural member, wherein
the other frame is set to have a larger inclination angle with respect to a vehicle front-rear direction than each of the first to third frames.
5. The front vehicle-body structure of the vehicle according to claim 3 , wherein in an event of an oblique collision, the third frame is facilitated to break in the Z-shape around the breakage facilitating beads.
6. The front vehicle-body structure of the vehicle according to claim 2 , further comprising another frame connecting the suspension housing and a vehicle cabin structural member, wherein
the other frame is set to have a larger inclination angle with respect to a vehicle front-rear direction than each of the first to third frames.
7. The front vehicle-body structure of the vehicle according to claim 2 , wherein in an event of an oblique collision, the first frame and the second frame are each facilitated to break inward around their respective breakage facilitating bead.
8. The front vehicle-body structure of the vehicle according to claim 1 , wherein
the third frame has breakage facilitating beads extending in a vertical direction on vehicle-width-direction inner and outer side portions of the third frame at positions offset from each other in a vehicle front-rear direction.
9. The front vehicle-body structure of the vehicle according to claim 8 , further comprising another frame connecting the suspension housing and a vehicle cabin structural member, wherein
the other frame is set to have a larger inclination angle with respect to a vehicle front-rear direction than each of the first to third frames.
10. The front vehicle-body structure of the vehicle according to claim 1 , further comprising another frame connecting the suspension housing and a vehicle cabin structural member, wherein
the other frame is set to have a larger inclination angle with respect to a vehicle front-rear direction than each of the first to third frames.