Chassis System for a Motor Vehicle and Method for Driving Dynamics Regulation

• US 20090026719A1
• Filed: 07/08/2008
• Published: 01/29/2009
• Est. Priority Date: 07/26/2007
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Koch, Thorsten, Hunn, Thomas
• Granted Patent: US 7,717,438 B2
• Time in Patent Office: Days
• US Class Current: 280/5.508
• CPC Class Codes: B60G 17/0162 mainly during a motion involving steering operation, e.g. cornering, overtaking B60G17/0164 takes precedence
• CPC Class Codes: B60G 21/0555 including an actuator inducing vehicle roll
• CPC Class Codes: B60G 21/073 between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
• CPC Class Codes: B60G 2200/46 camber angle
• CPC Class Codes: B60G 2202/413 Hydraulic actuator
• CPC Class Codes: B60G 2204/8304 using a fluid
• CPC Class Codes: B60G 2206/1116 Actively adjustable during driving
• CPC Class Codes: B60G 2800/0122 Roll rigidity ratio; Warping
• CPC Class Codes: B60G 7/006 Attaching arms to sprung or unsprung part of vehicle, characterised by comprising attachment means controlled by an external actuator, e.g. a fluid or electrical motor B62D7/146 takes precedence
• CPC Class Codes: B62D 17/00 Means on vehicles for adjusting camber, castor, or toe-in

Abstract

A chassis system for a motor vehicle has a device for roll stabilization and a device for wheel camber adjustment. The device for roll stabilization and the device for wheel camber adjustment have one or more hydraulic actuating devices. The device for roll stabilization and the device for wheel camber adjustment are coupled to one another by a common hydraulic system. Accordingly, a link is provided between the roll stabilization arrangement and the camber adjustment arrangement in the motor vehicle. An active camber adjustment arrangement is realized by using the hydraulic power supply and the valves of the roll stabilization arrangement.

Claims

1. A chassis system for a motor vehicle, the chassis system comprising:

a device for roll stabilization;

a device for wheel camber adjustment, said device for roll stabilization and said device for wheel camber adjustment each have at least one hydraulic actuating device; and

a common hydraulic system coupling said device for roll stabilization to said device for wheel camber adjustment.

2. The chassis system according to claim 1, further comprising a stabilizer, said at least one hydraulic actuating device of said device for roll stabilization is coupled to said stabilizer.

3. The chassis system according to claim 2, wherein said hydraulic actuating device of said device for roll stabilization is a pivoting actuating device for said stabilizer.

4. The chassis system according to claim 1, wherein said at least one hydraulic actuating device for said device for wheel camber adjustment has one hydraulic cylinder per wheel and is a linear actuating device.

5. The chassis system according to claim 1,

wherein said common hydraulic system has a pressure supply device and lines connected to said at least one hydraulic actuating device of said device for roll stabilization and of said device for wheel camber adjustment;

and

further comprising at least one valve device disposed between said pressure supply device and said at least one hydraulic actuating device.

6. The chassis system according to claim 5, wherein said pressure supply device is configured such that a nominal pressure in said common hydraulic system is set in dependence on a vehicle state, wherein at least one signal is used to determine the vehicle state selected from the group consisting of lateral acceleration, steering wheel angle, vehicle speed, and roll angle.

7. The chassis system according to claim 1, further comprising at least one device for adapting at least one of a hydraulic pressure and a hydraulic flow for said device for wheel camber adjustment.

8. The chassis system according to claim 1, wherein the chassis system is configured for at least one vehicle axle.

9. A method for driving dynamics regulation of a motor vehicle having a chassis system containing a device for roll stabilization, a device for wheel camber adjustment, and a common hydraulic system coupling the device for roll stabilization to the device for wheel camber adjustment, the device for roll stabilization and the device for wheel camber adjustment each have at least one hydraulic actuating device, which comprises the step of:

using the chassis system for active roll stabilization and for active wheel camber adjustment in dependence on a vehicle state of the motor vehicle.