Brake system for a motor vehicle and method for operating a brake system

• US 10,449,942 B2
• Filed: 11/17/2017
• Issued: 10/22/2019
• Est. Priority Date: 11/21/2016
• Status: Active Grant

• Current Assignee: Audi AG (Volkswagen AG)
• Original Assignee: Audi AG (Volkswagen AG)
• Inventors: Brok, Tobias, Ernst, Herbert
• Primary Examiner(s): Sahni, Vishal R
• Application Number:
  US15/816,437
• Publication Number:
  US 20180141529A1
• Time in Patent Office: 704 Days
• CPC Class Codes: B60T 13/146 Part of the system directly actuated by booster pressure
• CPC Class Codes: B60T 13/686 in hydraulic systems or parts thereof
• CPC Class Codes: B60T 8/4081 Systems with stroke simulating devices for driver input B60T8/4077 takes precedence

Abstract

A brake system for a motor vehicle, having a brake pressure source and at least one first wheel brake and at least one second wheel brake, which can be acted on with a brake pressure supplied by the brake pressure source. The first wheel brake is fluidically connected at a first inlet valve and at a first outlet valve, which is fluidically parallel to the first inlet valve, and at a first separating valve via the first inlet valve, and the second wheel brake is fluidically connected at a second inlet valve and at a second outlet valve, which is fluidically parallel to the second inlet valve, and at a second separating valve via the second inlet valve.

Claims

1. A brake system for a motor vehicle, comprising:

a brake pressure source and at least one first wheel brake and at least one second wheel brake, which can be acted on with a brake pressure supplied by the brake pressure source, and

at least one electronic control unit (ECU), the at least one ECU comprising a first electrical control circuit and a second electrical control circuit, each of the first electrical control circuit and the second electrical control circuit being separately supplied with electrical power,

wherein the first wheel brake is fluidically connected at a first inlet valve and at a first outlet valve, which is fluidically parallel to the first inlet valve, and at a first separating valve via the first inlet valve, and the second wheel brake is fluidically connected at a second inlet valve and at a second outlet valve, which is fluidically parallel to the second inlet valve, and at a second separating valve via the second inlet valve, wherein a first electrical control circuit and a second electrical control circuit that can be operated independently from the first electrical control circuit, wherein the first inlet valve and the first outlet valve and the second separating valve are connected at the first electrical control circuit and not the second electrical control circuit, and the second inlet valve and/or the second outlet valve are connected at the second electrical control circuit and not the first electrical control circuit.

2. The brake system according to claim 1, wherein the first inlet valve and the first outlet valve are connected at the first electrical control circuit, and the second inlet valve and the second outlet valve are connected at the second electrical control circuit.

3. The brake system according to claim 1, wherein the second separating valve is connected at the first electrical control circuit, and the first separating valve is connected at the second electrical control circuit.

4. The brake system according to claim 1, wherein the first outlet valve, the second outlet valve, the first separating valve, and the second separating valve are connected at the first electrical control circuit, and the first inlet valve and the second inlet valve are connected at the second electrical control circuit.

5. The brake system according to claim 1, wherein the valves connected at one of the first electrical control circuit or the second electrical control circuit are each separated by circuit technology from the other of the first electrical control circuit or the second electrical control circuit.

6. The brake system according to claim 1, wherein the first wheel brake can be connected via the first separating valve and the second wheel brake can be connected via the second separating valve to a brake master cylinder and to the brake pressure source.

7. The brake system according to claim 1, wherein in addition to the first separating valve, another first separating valve, and in addition to the second separating valve, another second separating valve is present, wherein the first separating valve and the additional first separating valve and the second separating valve and the additional second separating valve are joined together fluidically on their output sides fluidically facing the wheel brake.

8. The brake system according to claim 7, wherein the additional first separating valve and the additional second separating valve are connected on their input side turned away fluidically from the wheel brake at the brake master cylinder and the brake pressure source.

9. The brake system according to claim 1, wherein the first wheel brake and the second wheel brake are assigned to wheels of the same track or of opposite-lying tracks of the motor vehicle.

10. A method for operating a brake system for a motor vehicle, wherein the brake system provides a brake pressure source and at least one first wheel brake and at least one second wheel brake that can be acted on with a brake pressure supplied by the brake pressure source, and

wherein the brake system further provides at least one electronic control unit (ECU), the at least one ECU comprising a first electrical control circuit and a second electrical control circuit, each of the first electrical control circuit and the second electrical control circuit being separately supplied with electrical power;

wherein the first wheel brake is fluidically connected at a first inlet valve and at a first outlet valve, which is fluidically parallel to the first inlet valve, and at a first separating valve via the first inlet valve, and the second wheel brake is fluidically connected at a second inlet valve and at a second outlet valve, which is fluidically parallel to the second inlet valve, and at a second separating valve via the second inlet valve, wherein a first electrical control circuit and a second electrical control circuit operated independently from the first electrical control circuit, wherein the first inlet valve and the first outlet valve and the second separating valve are connected at the first electrical control circuit and not the second electrical control circuit, and the second inlet valve and the second outlet valve are connected at the second electrical control circuit and not the first electrical control circuit.