Braking system and method for regulating a pressure of a brake medium in a braking system

Patent metadata

Field	Value
Publication number	US-9789862-B2
Application number	US-201113985725-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	Feb 15, 2011
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A braking system, in particular for a motor vehicle, including a braking force device having a brake booster for boosting a braking force and a brake pressure supply device for providing brake pressure with the aid of a brake medium, a braking device which may be acted on by pressure by the brake medium with the aid of the brake pressure supply device, and at least one sensor which is designed to detect a distance differential of a displacement means for the displacement of a volume of the brake medium of the braking force device. The braking force device is designed to ascertain the volume of brake medium to be displaced on the basis of the detected distance differential.

First claim

What is claimed is:

1. A braking system, comprising:
a braking force device having a brake booster for boosting a braking force and a brake pressure supply device for providing a brake pressure via a brake medium;
a braking device which may be acted on by pressure by the brake medium via the brake pressure supply device;
a displacement arrangement for displacing a volume of the brake medium; and
at least one sensor for detecting a distance differential of the displacement arrangement, wherein the braking force device ascertains the volume of the brake medium to be displaced on the basis of the detected distance differential; and
a compensation arrangement for at least one of supplying and discharging a volume of brake medium at least one of to and from the braking device as a function of the ascertained volume of the brake medium to be displaced.

2. The braking system as recited in claim 1 , wherein the braking system is for a motor vehicle.

3. The braking system as recited in claim 1 , wherein the at least one sensor detects a position angle.

4. The braking system as recited in claim 1 , further comprising:
at least one additional sensor serving as one of a distance sensor and a differential path sensor.

5. The braking system as recited in claim 1 , wherein the braking force device compensates for a deformation of units of the braking system due to a change in pressure of the brake medium.

6. The braking system as recited in claim 1 , wherein one of the braking force device and the brake pressure supply device includes an elastic element which is deformable when acted on by pressure.

7. The braking system as recited in claim 1 , wherein:
the displacement arrangement includes a piston,
the brake pressure supply device includes a cylinder, and
the braking force device ascertains the volume to be displaced on the basis of a cross-sectional area of the piston multiplied by the distance differential of a displacement of the piston.

8. The braking system as recited in claim 1 , wherein the compensation arrangement is drivable with the aid of a motor.

9. The braking system as recited in claim 1 , wherein the compensation arrangement is designed in such a way that the volume of brake medium which is at least one of supplied and discharged by the compensation arrangement is less than the ascertained volume of the brake medium to be displaced.

10. A method for regulating a pressure of a brake medium in a braking system, comprising:
specifying a braking force;
boosting the braking force;
providing the boosted braking force with the aid of brake pressure in a braking device by a volume displacement of the brake medium;
detecting the volume displacement of the brake medium via a distance differential of a displacement arrangement; and
actuating a compensation arrangement to at least one of supply and discharge a brake medium volume of the braking device, wherein the volume of the brake medium at least one of supplied and discharged by the compensation arrangement is a function of the detected volume.

11. The method as recited in claim 10 , wherein the method is performed in a motor vehicle.

12. The method as recited in claim 10 , further comprising:
providing the brake pressure with the aid of the volume displacement; and
compensating for a deformation of an elastic element due to a change in pressure.

13. The method as recited in claim 10 , wherein the volume of brake medium supplied and/or discharged by the compensation arrangement is less than or equal to the detected volume.

14. A method of using a braking system that includes a braking force device having a brake booster for boosting a braking force and a brake pressure supply device for providing a brake pressure via a brake medium; a braking device which may be acted on by pressure by the brake medium via the brake pressure supply device; a displacement arrangement for displacing a volume of the brake medium; at least one sensor for detecting a distance differential of the displacement arrangement, wherein the braking force device ascertains the volume of the brake medium to be displaced on the basis of the detected distance differential, and a compensation arrangement for at least one of supplying and discharging brake medium volume at least one of to and from the braking device as a function of the ascertained volume of the brake medium to be displaced, the method comprising:
using the braking system in a passenger vehicle.

15. A braking system, comprising:
a braking force device having a brake booster for boosting a braking force and a brake pressure supply device for providing a brake pressure via a brake medium;
a braking device which may be acted on by pressure by the brake medium via the brake pressure supply device;
wherein the brake pressure supply device includes:
a displacement arrangement for displacing a volume of the brake medium,
an entrainer which is movable with the displacement arrangement for boosting a brake force, and
at least one sensor for measuring a displacement of the entrainer; and

wherein the braking force device ascertains the volume of the brake medium to be displaced on the basis of the measured displacement of the entrainer; and
at least one additional sensor serving as one of a distance sensor measuring a displacement of an input rod connected to a brake pedal, or a differential path sensor measuring a difference between a displacement of the entrainer and a displacement of the input rod; and
a compensation arrangement for at least one of supplying and discharging brake medium volume at least one of to and from the braking device as a function of the ascertained volume of the brake medium to be displaced.

16. The braking system as recited in claim 15 , wherein the volume of brake medium volume at least one of supplied and discharged by the compensation arrangement is less than or equal to the ascertained volume of brake medium to be displaced by the braking force device.

17. The braking system as recited in claim 15 , wherein the braking force device compensates for a deformation of units of the braking system due to a change in pressure of the brake medium.

18. The braking system as recited in claim 15 , wherein one of the braking force device and the brake pressure supply device includes an elastic element which is deformable when acted on by pressure.

Assignees

• Mayer Jochen
• Bosch Gmbh Robert

Inventors

• Mayer Jochen

Classifications

• B60T13/745

  acting on a hydraulic system, e.g. a master cylinder · CPC title

• B60T1/10 Primary

  by utilising wheel movement for accumulating energy, e.g. driving air compressors · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title

• B60T8/4077

  Systems in which the booster is used as an auxiliary pressure source · CPC title

• B60T8/4872

  pump-back systems · CPC title