Vehicle braking system

• US 20040217647A1
• Filed: 01/08/2004
• Published: 11/04/2004
• Est. Priority Date: 07/13/2001
• Status: Active Grant

• Current Assignee: Lucas Automotive GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: Lucas Automotive GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Knechtges, Josef, Einig, Frank
• Granted Patent: US 8,500,220 B2
• Time in Patent Office: Days
• US Class Current: 303/146
• CPC Class Codes: B60T 2230/03 Overturn, rollover
• CPC Class Codes: B60T 8/17554 specially adapted for enhancing stability around the vehicles longitudinal axle, i.e. roll-over prevention road vehicle drive control systems for roll-over prevention otherwise than by controlling a particular sub-unit B60W30/04

Abstract

The invention relates to a vehicle braking system comprising regulating devices, which determine the transversely dynamic behaviour of the vehicle, in order to maintain or restore stable vehicle behaviour by setting the braking torque, independently of the driver, on individual vehicle wheels. The performance of said braking system is configured to prevent the vehicle from overturning laterally when negotiating curves. To achieve this, according to the invention it is proposed that a braking torque should be generated on the front wheel on the outside of the curve, or a braking torque that has already been set should be increased.

Claims

1. Vehicle braking system comprising regulating devices, which determine the transversely dynamic behavior of the vehicle, in order to maintain or restore stable vehicle behavior by setting the braking torque, independently of the driver, on individual vehicle wheels, wherein to prevent the vehicle from overturning laterally when negotiating curves, a braking torque is generated on the front wheel on the outside of the curve, or a braking torque that has already been set is increased, wherein higher-level or lower-level driving dynamic regulation intervenes if because of the braking torque which has been generated or increased on the front wheel on the outside of the curve, under-steering of the vehicle has to be prevented.

2. Vehicle braking system according to claim 1, wherein the braking torque on the front wheel on the outside of the curve is generated or increased when the vehicle transverse acceleration, or a magnitude which is related to the vehicle transverse acceleration, exceeds a predefined limit.

3. Vehicle braking system according to claim 2, wherein the limit is predefined depending on the loading state of the vehicle.

4. Vehicle braking system according to claim 2, wherein the limit is reset to a minimum value at the start of each driving operation.

5. Vehicle braking system according to claim 2, wherein the limit is increased during driving operation, as long as the amount of the slip on the wheels on the inside of the curve is below, or not above, a predefined value.

6. Vehicle braking system according to claim 1, wherein the braking torque on the front wheel on the outside of the curve is generated or increased when the amount of the slip on the wheels on the inside of the curve is above, or not below, a predefined value.

7. Vehicle braking system according to claim 6, that wherein a driven wheel on the inside of the curve is tested for whether it is above, or not below, a predefined positive slip value.

8. Vehicle braking system according to claim 6, wherein on a non-driven wheel on the inside of the curve, a braking torque is generated, or a previously set braking torque is increased, to test the non-driven wheel on the inside of the curve for whether it is below, or not above, a predefined negative slip value.