Method for carrying out a braking procedure in a vehicle

Patent metadata

Field	Value
Publication number	US-9604615-B2
Application number	US-201314648617-A
Country	US
Kind code	B2
Filing date	Nov 18, 2013
Priority date	Nov 30, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

In a method for carrying out a braking procedure in a vehicle having a hydraulic brake system, when the brake temperature exceeds a boundary value hydraulic fluid is intermediately stored in a storage chamber, and when brake fading occurs the hydraulic fluid is pumped back into the brake circuit.

First claim

What is claimed is:

1. A method for carrying out a braking procedure in a vehicle having a hydraulic brake system, the method comprising:
intermediately storing, when a brake temperature exceeds a first boundary value, a partial volume of hydraulic fluid in a brake circuit in a storage chamber;
pumping back, when the brake temperature exceeds a brake fading boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit; and
pumping back, when the brake temperature is less than a second boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit;
wherein the first boundary value is less than the brake fading boundary value.

2. The method of claim 1 , wherein the storage chamber is filled only partly with hydraulic fluid from the brake circuit.

3. The method of claim 1 , wherein the storage chamber, together with an allocated pump, is a component of a driver assistance system.

4. The method of claim 1 , wherein the brake temperature is estimated from the hydraulic brake pressure and the wheel speeds of the vehicle.

5. The method of claim 1 , wherein the storage chamber, together with an allocated pump, is a component of a driver assistance system, which includes an electronic stability program (ESP).

6. The method of claim 1 , wherein pumping the hydraulic fluid accommodated in the storage chamber back into the brake circuit when the brake temperature decreases below the second boundary value does not influence a braking action of the brake circuit.

7. The method of claim 1 , wherein the second boundary value is less than the first boundary value.

8. The method of claim 1 , wherein the first boundary value is 400° C., the second boundary value is 250° C., and the brake fading boundary value is 600° C.

9. A regulating or control device for carrying out a braking procedure in a vehicle having a hydraulic brake system, comprising:
a control unit for performing the following:
intermediately storing, when a brake temperature exceeds a first boundary value, a partial volume of hydraulic fluid in a brake circuit in a storage chamber;
pumping back, when the brake temperature exceeds a brake fading boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit; and
pumping back, when the brake temperature is less than a second boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit;
wherein the first boundary value is less than the brake fading boundary value.

10. The device of claim 9 , wherein the second boundary value is less than the first boundary value.

11. The device of claim 9 , wherein the first boundary value is 400° C., the second boundary value is 250° C., and the brake fading boundary value is 600° C.

12. A driver assistance system in a vehicle, comprising:
an electronic stability program (ESP) having a regulating or control device;
wherein the regulating or control device includes a control unit for performing the following:
intermediately storing, when a brake temperature exceeds a first boundary value, a partial volume of hydraulic fluid in a brake circuit in a storage chamber;
pumping back, when the brake temperature exceeds a brake fading boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit; and
pumping back, when the brake temperature is less than a second boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit;
wherein the first boundary value is less than the brake fading boundary value.

13. The system of claim 12 , wherein the second boundary value is less than the first boundary value.

14. The system of claim 12 , wherein the first boundary value is 400° C., the second boundary value is 250° C., and the brake fading boundary value is 600° C.

15. A hydraulic brake system in a vehicle, comprising:
a regulating or control device for carrying out a braking procedure in a vehicle having the hydraulic brake system, including a control unit for performing the following:
intermediately storing, when a brake temperature exceeds a first boundary value, a partial volume of hydraulic fluid in a brake circuit in a storage chamber;
pumping back, when the brake temperature exceeds a brake fading boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit; and
pumping back, when the brake temperature is less than a second boundary value, the hydraulic fluid accommodated in the storage chamber into the brake circuit;
wherein the first boundary value is less than the brake fading boundary value;

and
a pump allocated to the storage chamber.

16. The brake system of claim 15 , wherein one storage chamber is provided per brake circuit in the hydraulic brake system.

17. The system of claim 15 , wherein the second boundary value is less than the first boundary value.

18. The system of claim 15 , wherein the first boundary value is 400° C., the second boundary value is 250° C., and the brake fading boundary value is 600° C.

Assignees

• Bosch Gmbh Robert

Inventors

• Dorsch Juergen

Classifications

• B60T8/4872 Primary

  pump-back systems · CPC title

• B60T8/1755

  Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve (road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02) · CPC title

• B60T13/14

  using accumulators or reservoirs {fed by pumps} · CPC title

• B60T8/442

  the booster being a fluid return pump, e.g. in combination with a brake pedal force booster · CPC title