Electromechanical Brake Pressure Control With Redundant Hydraulics
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Solution Overview
Problem
Conventional hydraulic braking systems rely on mechanical power transmission from a brake pedal to the master cylinder, which is complex, error-prone, and lacks redundancy in case of component failure.
Innovation Solution
A hydraulic braking system with an electromechanical drive actuating the master brake cylinder using electronic signals, supplemented by a vehicle dynamics control system with independent brake pressure generation, ensuring redundancy and safety through two independent hydraulic circuits and power supplies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical power transmission from brake pedal to master cylinder is used, then the braking system can be actuated by direct mechanical force, but the system becomes complex and error-prone
Solution Approach 1:
The patent replaces the mechanical power transmission system (brake pedal linkage to master cylinder) with an electromechanical system. The brake pedal is equipped with sensors that detect pedal travel and force, converting mechanical input into electrical signals. These signals are processed by a control unit that actuates an electromechanical pressure build-up device, eliminating the complex mechanical transmission components while maintaining brake actuation functionality.
Solution Approach 2:
The patent introduces electrical signals and a control unit as intermediaries between the driver's brake pedal input and the master cylinder actuation. Instead of direct mechanical coupling, the system uses sensor signals and electronic control logic as mediators to translate mechanical pedal input into controlled electromechanical pressure generation, simplifying the physical connection while adding intelligent control capabilities.
2Reliability
If mechanical connection from brake pedal to master cylinder is used, then the system structure is simple, but redundancy is lacking in case of component failure
Solution Approach 1:
The patent segments the braking system into independent functional modules: pedal sensors, control unit, electromechanical pressure build-up device, and traditional hydraulic components. This modular architecture allows individual components to fail without compromising the entire system, as the electronic control can detect failures and switch to alternative actuation modes or alert the driver, thereby enhancing reliability through functional independence.
Solution Approach 2:
The patent implements failure detection and warning systems that monitor the health of critical components before complete failure occurs. Sensors detect abnormal conditions in the electromechanical system or hydraulic circuits, and the control unit provides advance warning to the driver through dashboard alerts, allowing the driver to take preventive action before a complete braking failure occurs, thus cushioning against total system failure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Eliminates mechanical coupling, provides redundancy for hydraulic pressure generation, ensuring safe braking even with component failures, and enhances system reliability and safety.
Implementation Method 1
The electromechanical drive (12) is designed to actuate the master brake cylinder (11) using the setpoint specification received via the input interface (13)
Implementation Method 2
The master brake cylinder (11) is designed to build up hydraulic pressure in a plurality of independent brake circuits (B1, B2)
Data Source
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AI summary
The invention relates to a hydraulic brake system (1), in particular a hydraulic brake system (1) for a motor vehicle. The control of a master brake cylinder (11) to build up the hydraulic pressure is effected exclusively by an electric drive (12). The set point specification (S) for controlling the electromechanical drive (12) can be received as an electrical signal. In the event of a fault, a redundant brake pressure generation can be ensured by using a brake pressure generation device (21) of a vehicle dynamics control system (20).