# US 8,770,334 B2 · Motor vehicle body with active hood

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- Number: US 8,770,334 B2
- Document ID: US8770334B2
- Status: Granted
- Kind: B2
- Application number: 13/670,853
- Filed: 2012-11-07
- Published: 2013-05-16
- Granted: 2014-07-08
- Earliest claimed: 2011-11-10
- Assignees: GM Global Technology Operations LLC
- Applicants: GM Global Technology Operations LLC
- Inventors: Ulrich Rick
- Web page: https://patentgrep.com/patent/US8770334B2

## CPC

- B60R 21/38: using means for lifting bonnets
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

## Abstract

A motor vehicle body is provided. The motor vehicle body includes a front hood with an outer skin and a stiffening layer arranged under the outer skin and attached to the outer skin. The motor vehicle body also includes an actuator for lifting up the front hood during an accident, which is accommodated in a recess in the stiffening layer.

## Claims

### Claim 1

A motor vehicle body, comprising:
an outer skin;
a front hood encompassing a stiffening layer arranged under the outer skin and attached to the outer skin;
an actuator for lifting up the front hood during an accident, wherein the actuator is housed in a recess in the stiffening layer and configured to project downward; and
a lid covering the actuator when the actuator is in an idle state, the lid configured to project downward from the front hood when the actuator is expanded.

### Claim 2 (depends on 1)

The motor vehicle body according to claim 1, wherein the stiffening layer is cut out in the area of the recess.

### Claim 3 (depends on 1)

The motor vehicle body according to claim 1, wherein the recess is provided on a rearward edge of the front hood.

### Claim 4 (depends on 3)

The motor vehicle body according to claim 3, wherein the recess is centrally arranged on the rearward edge.

### Claim 5 (depends on 1)

The motor vehicle body according to claim 1, wherein the actuator is elongated in the transverse direction of the vehicle.

### Claim 6 (depends on 1)

The motor vehicle body according to claim 1, wherein the actuator is secured to the front hood.

### Claim 7 (depends on 6)

The motor vehicle body according to claim 6, wherein the recess lies opposite a surface fixed in place on the body.

### Claim 8 (depends on 6)

The motor vehicle body according to claim 6, wherein the actuator encompasses an expandable element that is expandable by feeding in a pressurized fluid.

### Claim 9 (depends on 8)

The motor vehicle body according to claim 8, wherein the expandable element is protected by the lid in the idle state.

### Claim 10 (depends on 9)

The motor vehicle body according to claim 9, wherein the lid is movable around an axis lying in front of the expandable element in the longitudinal direction of the vehicle.

### Claim 11 (depends on 9)

The motor vehicle body according to claim 9, wherein the lid covers a radiator tank in the open position.

### Claim 12 (depends on 8)

The motor vehicle body according to claim 8, wherein the expandable element encompasses a receiving chamber for the pressurized fluid bordered by a rubbery-elastic membrane.

### Claim 13 (depends on 12)

The motor vehicle body according to claim 12, wherein the expandable element exhibits a front side and rear side, and that the rear side is more expandable than the front side.

### Claim 14

A motor vehicle, comprising:
a body having an outer skin;
a front hood encompassing a stiffening layer arranged under the outer skin and attached to the outer skin;
an actuator including an expandable element for lifting up the front hood during an accident,
wherein the actuator is housed in a recess in the stiffening layer and configured to project downward; and
a lid covering the actuator when the actuator is in an idle state, the lid configured to project downward from the front hood when the actuator is expanded.

### Claim 15 (depends on 14)

The motor vehicle according to claim 14, wherein the recess is provided on a rearward edge of the front hood.

### Claim 16 (depends on 15)

The motor vehicle according to claim 15, wherein the recess is centrally arranged on the rearward edge.

### Claim 17 (depends on 15)

The motor vehicle according to claim 15, wherein the actuator is elongated in the transverse direction of the vehicle.

### Claim 18 (depends on 15)

The motor vehicle according to claim 15, wherein the expandable element is expandable by feeding in a pressurized fluid.

### Claim 19 (depends on 18)

The motor vehicle according to claim 18, wherein the expandable element encompasses a receiving chamber for the pressurized fluid bordered by a rubbery-elastic membrane.

### Claim 20 (depends on 19)

The motor vehicle according to claim 19, wherein the expandable element exhibits a front side and rear side, and that the rear side is more expandable than the front side.