Braking system and control procedures

The braking system addresses reliability and deceleration needs for HAD by incorporating a second hydraulic pressure source and isolating valves, ensuring high deceleration and reduced complexity in hybrid systems.

DE102024211392A1Pending Publication Date: 2026-05-28CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH
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Patent Information

Application Number
DE102024211392
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

Existing braking systems, particularly those transitioning to electromechanical systems, lack reliability and fail to meet the deceleration requirements for highly automated driving (HAD) due to insufficient brake force amplification and redundancy, especially in hybrid systems with limited brake fluid volume and complex, heavy, and expensive architectures.

Method used

A braking system with a second electrically controllable hydraulic pressure source, such as a pump, and a single circular separating valve per pressure supply line, along with independent circuit isolating valves and separate circuit boards, ensures redundancy and isolation, allowing for high deceleration even in fault conditions, reducing complexity and weight.

Benefits of technology

The system provides reliable and efficient brake force amplification, meeting HAD deceleration requirements with reduced complexity, weight, and cost by isolating components and utilizing dual pressure sources for enhanced functionality.

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Abstract

The present invention relates to an electro-hydraulic braking system (1) comprising a first hydraulic pressure source (2), inlet valves (3) and outlet valves (4), at least two hydraulic wheel brakes (5, 6) and at least two electromechanical wheel brakes (7, 8). A control unit (9, 10) is provided for controlling the at least two hydraulically actuated wheel brakes (5, 6) and the at least two electromechanically actuated wheel brakes (7, 8). The aim is to provide a braking system with higher reliability. For this purpose, the braking system (1) includes a second electrically controlled hydraulic pressure source (11), and each pressure supply line between the first pressure source (2) and each of the inlet valves (3) contains only one circuit isolating valve (12) and no other valves. This significantly increases reliability without unnecessarily increasing the complexity and weight of the braking system.
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Citation Information

Patent Citations

  • Combined braking system for vehicles and methods for its operation

    DE102012217825A1

  • Braking system for a motor vehicle

    DE102019213057A1

  • Brake system for a motor vehicle and two methods for the operation thereof

    WO2018130482A1