# US 10,308,090 B2 · Motor vehicle chassis

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,308,090 B2
- Document ID: US10308090B2
- Status: Granted
- Kind: B2
- Application number: 15/977,037
- Filed: 2018-05-11
- Published: 2018-09-13
- Granted: 2019-06-04
- Earliest claimed: 2015-11-13
- Assignees: Hoerbiger Automotive Komfortsysteme GmbH
- Applicants: Hoerbiger Automotive Komfortsysteme GmbH
- Inventors: Klaus Stolle
- Web page: https://patentgrep.com/patent/US10308090B2

## CPC

- B60G 17/0272: {the mechanical spring being a coil spring}
- B60G 15/06: and fluid damper
- B60G 15/062: {the spring being arranged around the damper (B60G15/061, B60G15/067, B60G15/07 take precedence)}
- B60G 2202/30: Spring/Damper and/or actuator Units
- B60G 2202/312: The spring being a wound spring
- B60G 2202/413: Hydraulic actuator
- B60G 2202/416: using a pump, e.g. in the line connecting the lower chamber to the upper chamber of the actuator
- B60G 2202/42: Electric actuator
- B60G 2500/30: Height or ground clearance
- B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00})

## Abstract

In a motor vehicle chassis, all four wheel suspensions each have associated therewith a hydraulic height adjustment device having a cylinder-piston arrangement which acts on a base point of the relevant spring and is supplied by a decentral hydraulic aggregate. The hydraulic height adjustment devices each comprise a complex, integrated electrohydraulic adjustment assembly comprising the allocated hydraulic aggregate and the associated cylinder-piston arrangement and having a specific adapter into which the allocated cylinder-piston arrangement is integrated in such a way that there are no exposed hydraulic lines between the allocated hydraulic pump and the associated cylinder-piston arrangement. The front wheel height adjustment devices and the rear wheel height adjustment devices differ in terms of the adapter.

## Claims

### Claim 1

A motor vehicle chassis comprising:
a basic structure (1),
two front wheels connected thereto via one front-wheel suspension each; and
two rear wheels connected thereto via one rear-wheel suspension each,
wherein each of the two front-wheel suspensions is provided at least with one front wheel spring associated with a corresponding front wheel and at least one shock absorber associated with the corresponding front wheel in a first spring-shock-absorber arrangement, in which respectively the shock absorber is disposed within the front wheel spring, which is constructed as a coil spring, and each of the two rear-wheel suspensions is provided at least with one rear wheel spring (3) associated with a corresponding rear wheel and at least one shock absorber associated with the corresponding rear wheel in a second spring-shock-absorber arrangement, in which respectively the shock absorber is disposed outside the rear wheel spring, which is constructed as a coil spring, with the following features:
respectively one hydraulic height-positioning device with a cylinder-piston arrangement (20) acting on a foot point (4) of the spring (3) in question is associated with all four wheel suspensions;
the cylinder-piston arrangement (20) can be pressurized respectively by a hydraulic aggregate (21) comprising a decentralized hydraulic pump (25) associated with the corresponding wheel and respectively driven by an electric motor (22);
each hydraulic height-positioning device comprises a complex, integrated electrohydraulic positioning assembly (5) comprising the respective hydraulic aggregate (21) and the associated cylinder-piston arrangement (20), with a specific adapter (6), in which the respective cylinder-piston arrangement (20) is integrated in such a way that no exposed hydraulic lines of any kind exist between the respective hydraulic pump (25) and the associated cylinder-piston arrangement (20);
the cylinder-piston arrangement (20) comprises respectively an annular hydraulic working chamber (18);
an annular hydraulic-fluid storage container (19) that changes its volume inversely relative to the annular working chamber (18) is disposed axially offset from the annular hydraulic working chamber (18) of the cylinder-piston arrangement (20);
the hydraulic height-positioning devices of the front wheels and the hydraulic height-positioning devices of the rear wheels differ with respect to the adapter (6) in such a way that, in the first spring-shock-absorber arrangement, the hydraulic aggregate (21) is disposed outside the coil spring and, in the second spring-shock-absorber arrangement, at least the electric motor (22) of the hydraulic aggregate (21) is disposed within the rear wheel spring (3);
nevertheless, the hydraulic height-positioning devices of the front wheels and the hydraulic height-positioning devices of the rear wheels are identical in design, except for the respective adapter (6) and the arrangement of the height positioning devices within the corresponding spring-shock-absorber arrangements.

### Claim 2 (depends on 1)

The motor vehicle chassis of claim 1, wherein the housing of the associated hydraulic pump (25) is respectively integrated in the adapter (6) in such a way that the pump rotor (26) rotates in a cavity constructed in the adapter (6).

### Claim 3 (depends on 1)

The motor vehicle chassis of claim 1, wherein the hydraulic-fluid storage container (19) is respectively integrated in the adapter (6).

### Claim 4 (depends on 1)

The motor vehicle chassis of claim 1, wherein the adapters (6) of the front-wheel height-positioning devices and the adapters of the rear-wheel height-positioning devices respectively comprise a base member comprising a housing portion (11) and an adapter core (12) enclosed thereby, as well as an actuating portion (8), which is movable relative thereto, wherein the adapter cores (12) of the front-wheel height-positioning devices and of the rear-wheel height-positioning devices are identical in design.

### Claim 5 (depends on 1)

The motor vehicle chassis of claim 1, wherein the second spring-shock-absorber arrangement, a hydraulic working chamber (18) of the cylinder-piston arrangement (20) is respectively disposed within the rear wheel spring (3).

### Claim 6 (depends on 1)

The motor vehicle chassis of claim 1, wherein, in the second spring-shock-absorber arrangement, a hydraulic-fluid storage container (19) is respectively disposed within the rear wheel spring (3).