# US 2021/0276622 A1 · Side rail walls for bending loading in the event of a lateral impact

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- Number: US 2021/0276622 A1
- Document ID: US20210276622A1
- Status: Published application
- Kind: A1
- Application number: 17/257,446
- Filed: 2019-06-14
- Published: 2021-09-09
- Earliest claimed: 2018-07-18
- Assignees: Psa Automobiles SA
- Applicants: Psa Automobiles SA
- Inventors: Stéphane FONFREDE; Tou THOR
- Web page: https://patentgrep.com/patent/US20210276622A1

## CPC

- B62D 21/157: {for side impacts}
- B62D 25/025: {Side sills thereof}
- B62D 25/2036: {the subunits being side panels, sills or pillars (B62D21/157 takes precedence)}
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

The invention relates to a motor vehicle underbody structure (1) which comprises a floor (3) delimited on each side by an underbody profiled section (5), there being at least one transverse partition (13) inside at least one of the two profiled sections (7). This partition (13) or at least one of the transverse partitions (13) also has an inner edge (13.1) and an outer edge (13.2), the outer edge (13.2) having a minimum height greater than a minimum height of the inner edge (13.1), so as to generate a bending torque at the floor (3) about a longitudinal direction in the event of a side impact.

## Claims

### Claim 1

A motor vehicle underbody structure, comprising:
a floor;
two underbody profiled sections, there being one of said two underbody profiled sections on each side of the floor;
at least one transverse partition in at least one of the two underbody profiled sections;
wherein
the least one of the transverse partition has an inner edge and an outer edge, the outer edge having a minimum height greater than a minimum height of the inner edge, so as to generate a bending torque at the floor about a longitudinal direction in the event of a side impact.

### Claim 2 (depends on 1)

The underbody structure according to claim 1, wherein the inner and outer edges of the at least one transverse partition are vertical and/or have an average inclination of less than 30° relative to the vertical.

### Claim 3 (depends on 1)

The underbody structure according to claim 1, wherein each of the two underbody profiled sections comprises an inner side rail and an outer side rail secured to said inner side rail, the inner edge of the at least one transverse partition facing the inner side rail and the outer edge of the at least one transverse partition facing the inner side rail.

### Claim 4 (depends on 1)

The underbody structure according to claim 1, wherein the minimum height of the outer edge of the at least one transverse partition is greater than half the height of the inner edge.

### Claim 5 (depends on 1)

The underbody structure according to claim 1, wherein the outer edge of the at least one transverse partition has a maximum height greater than a maximum height of the inner edge.

### Claim 6 (depends on 1)

The underbody structure according to claim 1, wherein the at least one transverse partition has a lower edge connecting the inner and outer edges, said lower edge being inclined and/or curved.

### Claim 7 (depends on 1)

The underbody structure according to claim 1, wherein the at least one transverse partition has one or more horizontal ribs (19).

### Claim 8 (depends on 1)

The underbody structure according to claim 1, wherein said underbody structure further comprises at least one seat crossmember and/or a heel board, at least two of the transverse partitions being located longitudinally at the height of the seat crossmember or the heel board.

### Claim 9 (depends on 8)

The underbody structure according to claim 8, wherein the outer edge of the or each of the transverse partition has a maximum height greater than a maximum height of the seat crossmember or the heel board adjacent to said partition.

### Claim 10 (depends on 1)

The underbody structure according to claim 1, wherein the at least one transverse partition forms one or more pairs of said partitions the partitions of the one or more pairs of partitions being are arranged in parallel with one another and are connected at their outer edges.