US-20260125035-A1 - BRAKING SYSTEM WITH FLEXIBLE ARCHITECTURE AND METHOD FOR OPERATING SUCH A BRAKING SYSTEM

Abstract

A braking system with flexible architecture and a method for operating such a braking system for a motor vehicle are disclosed. The braking system can include a brake pedal with a pedal sensor for detecting the driver input and electrically controllable wheel brake modules. The pedal sensor can be connected to an electronic control unit, which generates control information for the electronic power unit from the braking information of the pedal sensor. The electronic power unit is used to control the wheel brakes.

Inventors

• Thorsten Ullrich
• Martin Baechle
• Achim Netz
• Mathias Haag

Assignees

• Continental Automotive Technologies GmbH

Dates

Publication Date

20260507

Application Date

20230906

Priority Date

20220921

Claims (20)

1. 1 . A braking system for a motor vehicle, comprising: a brake pedal with at least one pedal sensor for detecting the driver input; a plurality of electrically controllable wheel brake modules each comprising an electromechanical wheel brake; at least one electronic control unit; and at least one electronic power unit which is designed to control at least one electromechanical wheel brake; wherein the pedal sensor is connected via at least one braking input signal line to at least one electronic control unit; and wherein the at least one electronic control unit is designed to generate control information for the electronic power unit from the braking information of the pedal sensor and to transmit said control information to the electronic power unit.
2. 2 . The braking system as claimed in claim 1 , wherein the brake pedal comprises at least two pedal sensors, which are at least a force sensor and a travel sensor, and wherein the signals of the two pedal sensors can be transmitted during operation to the electronic control unit.
3. 3 . The braking system as claimed in claim 2 , wherein each pedal sensor is connected to each of the at least one electronic control unit via a braking input signal for of the at least one electronic control units.
4. 4 . The braking system as claimed in claim 1 , wherein the electromechanical wheel brakes are one of electromechanical disk brakes and electromechanical drum brakes.
5. 5 . The braking system as claimed in claim 1 , wherein the electromechanical wheel brake of a front wheel is an electromechanical disk brake and the electromechanical wheel brake of a rear wheel is an electromechanical drum brake.
6. 6 . The braking system as claimed in claim 1 , wherein the at least one electronic control unit is redundant, and wherein each of the at least one electronic control unit comprises the same functionality as one another with regard to the generation of the control information for the at least one electronic power unit.
7. 7 . The braking system as claimed in claim 1 , wherein the at least one electronic control unit is at least two electronic control units accommodated in two spatially separated housings from one another.
8. 8 . The braking system as claimed in claim 7 , wherein at least one data bus line, for data transmission is arranged between the separately arranged electronic control units.
9. 9 . The braking system as claimed in claim 1 , wherein the at least one electronic control unit is spatially separated from the electronic power unit.
10. 10 . The braking system as claimed in claim 8 , wherein at least one data bus line is arranged between the at least one electronic control unit and the at least one electronic power unit.
11. 11 . The braking system as claimed in claim 1 , wherein the at least one electronic control unit comprises at least one microprocessor per electronic control unit.
12. 12 . The braking system as claimed in claim 1 , wherein the at least one electronic control unit is connected to a data bus of the motor vehicle.
13. 13 . The braking system as claimed in claim 1 , wherein each electronic control unit has its own; separate supply voltage.
14. 14 . The braking system as claimed in claim 1 , wherein is at least two electronic control units accommodated in a common module or in a common housing.
15. 15 . The braking system as claimed in claim 1 , wherein at least one of a front axle and a rear axle the at least one electronic power unit is directly assigned to the associated electromechanical wheel brake.
16. 16 . The braking system as claimed in claim 1 , wherein at least one of a front axle and a rear axle an axle controller is provided, which comprises the at least one electronic power unit for controlling the associated electromechanical wheel brakes located at that axle.
17. 17 . The braking system as claimed in claim 1 , wherein at least one diagonal controller is provided, which comprises the at least one electronic power unit for controlling diagonally opposite wheel brakes.
18. 18 . The braking system as claimed in claim 1 , wherein at least one electronic control unit and one of the at least one electronic power unit, an axle controller, and a diagonal controller are accommodated in a common housing.
19. 19 . The braking system as claimed in claim 1 , wherein the at least one electronic power units of an axle controller or a diagonal controller each have a separate supply voltage.
20. 20 . The braking system as claimed in claim 1 , wherein the electronic power units of an axle controller or a diagonal controller are redundant.

Description

TECHNICAL FIELD The embodiments generally relate to a braking system with flexible architecture and to a method for operating such a braking system for a motor vehicle. BACKGROUND In motor vehicle technology, “brake-by-wire” braking systems are being used ever more widely. Braking systems of this kind often comprise a brake pedal which is designed as an electronic pedal. The brake pedal detects a driver braking input by means of a sensor and, from this, generates a driver braking input signal. In these braking systems, the driver can be decoupled from direct access to the brakes. The detected braking input can lead to the determination of a setpoint braking torque, from which the setpoint brake pressure for the brakes can then be obtained. Here, the wheel brakes can be designed as electromechanical (dry) brakes. The driver braking input signal can be transmitted to a central control unit, which performs the electric control of the wheel brakes. However, with such a design of the braking system, if a central control unit fails, it is immediately necessary to switch to a fallback level in order to be able to maintain essential functions of the braking system. Against this background, an operating system with improved safety provides a braking system with two axle controllers, wherein a first axle controller is assigned two wheel brake modules and a second axle controller is assigned two further wheel brake modules. Each of the two axle controllers is connected to the brake pedal on a signal input side. In addition, each of the two axle controllers comprises two control units, which each control one wheel brake. In this concept, the brake pedal is connected to each axle controller. The required functionality for converting the brake signals from the brake pedal into control signals for the control units therefore has to be provided in the axle controller and in particular also in the redundant control units. In addition, the integration of the “brake-by-wire” braking systems in existing vehicle configurations, which have conventionally been equipped with hydraulic components, requires adaptation to the braking system or to the vehicle configuration, with customer-specific requirements frequently also having to be taken into account. Accordingly, a braking system is desirable that meets the applicable safety requirements, also with regard to driverless driving, and that can be adapted to different vehicle configurations, customer requirements or safety requirements. SUMMARY This object is achieved by a braking system for a motor vehicle, and by a method for operating a braking system of this kind. In a first aspect, a braking system for a motor vehicle comprises a brake pedal with at least one pedal sensor for detecting the driver input;a plurality electrically controllable wheel brake modules, each comprising an electromechanical wheel brake,at least one electronic control unit, andat least one electronic power unit, which is designed to control at least one electromechanical wheel brake,wherein the pedal sensor is connected via at least one braking input signal line to at least one electronic control unit, andwherein the at least one electronic control unit is designed to generate control information for the electronic power unit from the braking information of the pedal sensor and to transmit said control information to the electronic power unit. The braking system is designed as a by-wire braking system and may have a dry brake pedal, also referred to as an electronic pedal. It is also possible to use a “wet” brake pedal, which is correspondingly electrically connected. The brake pedal mat be designed to generate a corresponding signal, also referred to as braking information, from the measured driver's braking input, which signal can be transmitted via at least one braking input signal line to the electronic control unit. For reasons of redundancy, at least two separate, redundant, that is, two functionally identical braking input signal lines may be provided, which are used for transmitting the signal between the brake pedal and the electronic control unit. For this purpose, the braking input signal line can be configured as a bidirectional braking input signal line. At least one braking input signal line between the brake pedal and each electronic control unit may be provided. The brake pedal can comprise at least two pedal sensors, which are based on two different measuring principles. Use can be made, by way of example, of a force sensor, which detects the force with which the driver steps on the pedal, and a travel sensor, which measures the distance by which the driver depresses the pedal. With these different pedal sensors, the fault patterns are different, and therefore a jammed pedal, for example, can be detected from the fact that force is exerted on the pedal without the latter moving. On the basis of the sensor signals, information or signals for the electromechanical braking system that corres