# US 5,700,025 A · Vehicle suspension system for a steerable wheel

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- Number: US 5,700,025 A
- Document ID: US5700025A
- Status: Granted
- Kind: A
- Application number: 08/750,376
- Filed: 1996-12-06
- Granted: 1997-12-23
- Earliest claimed: 1996-12-06
- Assignees: Hyundai Motor Company
- Inventors: Un Koo Lee
- Web page: https://patentgrep.com/patent/US5700025A

## CPC

- B62D 17/00: Means on vehicles for adjusting camber, castor, or toe-in
- B60G 3/265: {with a strut cylinder contributing to the suspension geometry by being linked to the wheel support via an articulation}
- B60G 17/0195: characterised by the regulation being combined with other vehicle control systems {(conjoint control of vehicle sub-units including control of suspension systems B60W10/22)}
- B60G 2200/10: Independent suspensions
- B60G 2200/144: with two lateral arms forming a parallelogram
- B60G 2200/46: camber angle
- B60G 2200/462: Toe-in/out
- B60G 2202/40: Type of actuator
- B60G 2202/413: Hydraulic actuator
- B60G 2204/421: Pivoted lever mechanisms for mounting suspension elements, e.g. Watt linkage
- B60G 2204/62: Adjustable continuously, e.g. during driving
- B60G 2300/40: Variable track or wheelbase vehicles
- B60G 2600/18: Automatic control means
- 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)
- B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00})

## Abstract

The suspension system for a vehicle includes a wheel carrier for supporting a wheel. There is a camber regulating device and a caster regulating device. These regulating devices are disposed on a car body side end of a control arm. There is also a co-regulating device, which is connected to the wheel carrier. Sensors sense the driving state of the vehicle and an electronic control unit receives a signal from the sensor for controlling the camber, caster and toe regulating devices.

## Claims

### Claim 1

A vehicle suspension system for a steerable wheel comprising:
a wheel carrier rotatably supporting a wheel;
camber regulating means which is disposed on car body side ends of a control arm for pushing or pulling said control arm to a wheel side thereby regulating a camber angle;
caster regulating means which is disposed on the car body side ends of said control arm for moving said control arm to a front and a rear of the vehicle thereby regulating a caster angle;
toe regulating means which is connected with said wheel carrier thereby regulating a toe;
sensors sensing a driving state of the vehicle; and
an electronic control unit for receiving signals from said sensors and controlling said camber regulating means, said caster regulating means and said toe regulating means.

### Claim 2 (depends on 1)

The vehicle suspension system for the steerable wheel according to claim 1, wherein said camber regulating means includes:
a fixed rod rotatably connected with the car body side ends of said control arm;
a hinged plate which is rotatably connected with both side ends of the fixed rod and is hinged on the car body;
an actuator which is rotatably connected with the fixed rod and moves the fixed rod in the direction of car width; and
a direction converting valve controlling the flowing direction of pressurized fluid supplied to the actuator.

### Claim 3 (depends on 1)

The vehicle suspension system for the steerable wheel according to claim 1, wherein said caster regulating means includes:
a fixed rod rotatably connected with the car body side ends of said control arm;
mail screw portions provided on both ends of the fixed rod;
a worm gear fixed on one side end of the fixed rod;
a worm for rotating the worm gear;
a ball-screw which is fixed to the hinged plate, in which the male screw portion is inserted thereby making the fixed rod to rotate and move in the front and the rear direction of the vehicle; and
driving means for rotating the worm.

### Claim 4 (depends on 1)

The vehicle suspension system for the steerable wheel according to claim 1, wherein said toe regulating means includes:
a connecting link connected with said wheel carrier;
a pivot member which is hinged on the car body and is connected with the connecting link;
an actuator rotating the pivot member; and
a direction converting valve controlling the flowing direction of pressurized fluid supplied to the actuator.

### Claim 5 (depends on 2)

The vehicle suspension system for the steerable wheel according to claim 2, wherein the fixed rod includes a first fixed rod rotatably connected with the car body side ends of said control arm and a second fixed rod rotatably connected with the actuator.