US-12623724-B2 - Side reinforced vehicle body

Abstract

A side reinforced vehicle body includes a side sill inner formed in a longitudinal direction of a cabin portion, a side sill outer surrounding the side sill inner, and a side reinforcement including a zig-zag pattern cross-section and disposed between the side sill inner and the side sill outer.

Inventors

• Taeou Park
• Sunghoon Cho

Assignees

• HYUNDAI MOTOR COMPANY
• KIA CORPORATION

Dates

Publication Date

20260512

Application Date

20230626

Priority Date

20220915

Claims (15)

1. 1 . A side reinforced vehicle body comprising: a side sill inner formed in a longitudinal direction of a cabin portion; a side sill outer surrounding the side sill inner; and a side reinforcement including a zig-zag pattern cross-section and disposed between the side sill inner and the side sill outer, wherein the side reinforcement is integrally formed with Carbon Fiber Reinforced Plastic (CFRP) material, wherein the side reinforcement includes: a plurality of upper reinforcement surfaces; a plurality of lower reinforcement surfaces; and a plurality of side reinforcement surfaces connecting the upper reinforcement surfaces and the lower reinforcement surfaces, wherein the side reinforcement further include an internal connection surface in contact with the side sill inner, wherein the side reinforcement further include an external connection surface in contact with the side sill outer.
2. 2 . The side reinforced vehicle body of claim 1 , wherein the external connection surface connects first portions of the side reinforcement surfaces, the upper reinforcement surfaces, and the lower reinforcement surfaces to increase a strength of the side reinforcement.
3. 3 . The side reinforced vehicle body of claim 1 , wherein the internal connection surface connects second portions of the side reinforcement surfaces, the upper reinforcement surfaces, and the lower reinforcement surfaces to increase a strength of the side reinforcement.
4. 4 . The side reinforced vehicle body of claim 1 , wherein the cabin portion includes: a cabin under floor; and a cross member inner mounted to the cabin under floor along a width direction of the side reinforced vehicle body.
5. 5 . The side reinforced vehicle body of claim 4 , wherein the cabin under floor includes: an under floor body; and a mount protruding portion on which the cross member inner is mounted.
6. 6 . The side reinforced vehicle body of claim 4 , wherein the cross member inner is formed of a foam core material.
7. 7 . The side reinforced vehicle body of claim 5 , wherein the under floor body and the lower reinforcement surfaces form a lower crash load path.
8. 8 . The side reinforced vehicle body of claim 7 , wherein the under floor body and the lower reinforcement surfaces are disposed at a same level along the width direction of the vehicle body to form the lower crash load path.
9. 9 . The side reinforced vehicle body of claim 5 , wherein the mount protruding portion and the upper reinforcement surfaces form an upper crash load path.
10. 10 . The side reinforced vehicle body of claim 1 , wherein the cabin portion is formed of CFRP material, and wherein the internal connection surface and the side sill inner are bonded together.
11. 11 . The side reinforced vehicle body of claim 1 , wherein the cabin portion is formed of a metal material, and wherein the internal connection surface and the side sill inner are bolted together.
12. 12 . The side reinforced vehicle body of claim 1 , wherein the side sill outer is formed of CFRP material, and the external connection surface and the side sill outer are bonded together.
13. 13 . The side reinforced vehicle body of claim 1 , wherein the side sill outer is formed of a metal material, and wherein the external connection surface and the side sill outer are bolted together.
14. 14 . The side reinforced vehicle body of claim 4 , wherein the cabin portion includes an internal tunnel portion protruding to a center portion thereof, and wherein the cross member inner contacts with the internal tunnel portion.
15. 15 . The side reinforced vehicle body of claim 1 , wherein the zig-zag pattern cross-section includes a trapezoidal shape and an inverted trapezoidal shape alternately formed each other.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to Korean Patent Application No. 10-2022-0116575 filed on Sep. 15, 2022, the entire contents of which is incorporated herein for all purposes by this reference. BACKGROUND OF THE PRESENT DISCLOSURE Field of the Present Disclosure The present disclosure relates to a side reinforced vehicle body. More particularly, the present disclosure relates to a vehicle body reinforced on a side using a side reinforcement having a zig-zag pattern. Description of Related Art It has been used as methods to prepare for side collision of a cabin portion of the vehicle in which the occupant is boarding, for example, a method of increasing the cross-section size of the side sill, a method of preventing external objects from entering the cabin by additionally inserting aluminum and CFRP structures into the steel vehicle body and the like have been used. That is, in a general vehicle body, a closed cross-section structure has been applied to the side sill to prepare for a side collision. A closed cross-section consisting of a side sill inner panel and a side external reinforce panel is applied to a typical steel vehicle body, and a bulk head may be inserted into the closed cross-section. Recently, environmental pollution by exhaust gas has become a problem, and regulations on internal combustion engine-based vehicles are being strengthened, and research and development on hybrid vehicles, battery electric vehicles, and hydrogen electric vehicles are being conducted. A high power battery is mounted on the present environment-friendly vehicle, and the high power battery is mainly mounted on the vehicle body floor. When a high power battery is mounted on the vehicle body floor, it is possible to prevent damage to the occupant and battery by applying a closed cross-section shape of steel material and applying an aluminum extruded member as a reinforcement member. Carbon Fiber Reinforced Plastic (CFRP) is a composite material that utilizes carbon fiber as a reinforcing material and a thermosetting resin or thermoplastic resin as a matrix. Because CFRP is relatively light and has high strength, its use in vehicle body manufacturing is increasing. However, when combining the structure of CFRP material with the structure of aluminum or steel material, the internal structural corrosion due to heterogeneous bonding must be considered. The information included in this Background of the present disclosure is only for enhancement of understanding of the general background of the present disclosure and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. BRIEF SUMMARY Various aspects of the present disclosure are directed to providing a vehicle body reinforced on a side using a side reinforcement including a zig-zag pattern. A side reinforced vehicle body according to various exemplary embodiments of the present disclosure may include a side sill inner formed in a longitudinal direction of a cabin portion, a side sill outer surrounding the side sill inner, and a side reinforcement including a zig-zag pattern cross-section and disposed between the side sill inner and the side sill outer. The side reinforcement may be integrally formed with CFRP material. The side reinforcement may include a plurality of upper reinforcement surface, a plurality of lower reinforcement surface, and a plurality of side reinforcement surfaces connecting the upper reinforcement surfaces and the lower reinforcement surfaces. The side reinforcement may further include an internal connection surface in contact with the side sill inner. The side reinforcement may further include an external connection surface in contact with the side sill outer. The cabin portion may include a cabin under floor, and a cross member inner mounted to the cabin under floor along the width direction of the vehicle body. The cabin under floor may include an under floor body, and a mount protruding portion on which the cross member inner is mounted. The cross member inner may be formed of a foam core material The under floor body and the lower reinforcement surface may form a lower crash load path, and the mount protruding portion and the upper reinforcement surface may form an upper crash load path. The cabin portion may be formed of CFRP material, and the internal connection surface and the side sill inner are bonded together. The cabin portion may be formed of a metal material, and the internal connection surface and the side sill inner may be bolted together. The side sill outer may be formed of CFRP material, and the external connection surface and the side sill outer may be bonded together. The side sill outer may be formed of a metal material, and the external connection surface and the side sill outer may be bolted together. The cabin portion may include an internal tunnel portion protruding to a center portio