Hydraulic Brake Coupling for Stable ESP Volume Supply
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Solution Overview
Problem
Current vehicle brake systems with closed hydraulic systems face challenges in maintaining a consistent hydraulic volume, leading to potential suction issues and inefficiencies, especially when integrated with ESP systems, which require additional hydraulic volume that may not be present in normal operation.
Innovation Solution
A method and system that hydraulically couples a power brake with a driving dynamics control, using a coupling valve to manage hydraulic pressure and volume, ensuring that the hydraulic volume is maintained within the system without relying on additional reservoirs, and utilizing a plunger to build and regulate pressure, thereby preventing suction from the reservoir and maintaining system functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a closed hydraulic system is used, then the hydraulic volume remains constant, but the ESP system cannot obtain additional hydraulic volume when needed
Solution Approach 1:
The hydraulic system is segmented into two independent but coupled subsystems: the power brake system and the ESP system. Each system has its own hydraulic circuit and control mechanism. The power brake system maintains a closed hydraulic circuit for stability, while the ESP system can access hydraulic volume from the power brake system through a coupling valve when needed, thus resolving the contradiction between volume consistency and volume availability.
Solution Approach 2:
A coupling valve is introduced as an intermediary component between the power brake system and the ESP system. This coupling valve acts as a controlled interface that allows hydraulic volume to be transferred from the power brake system to the ESP system when the ESP is activated, while maintaining the closed circuit structure of the power brake system. This mediator enables adaptability without compromising the stability of the base system.
2Adaptability or versatility
If an open hydraulic system is used, then additional hydraulic volume is available for ESP, but the system requires additional reservoirs and has increased complexity
Solution Approach 1:
The power brake system's hydraulic circuit is designed to serve dual functions: it operates as a closed system for normal braking operations, and simultaneously serves as a hydraulic volume source for the ESP system when activated. This multi-functionality eliminates the need for separate reservoirs and complex open circuit structures, reducing overall system complexity while maintaining volume availability for ESP.
Solution Approach 2:
The invention merges the hydraulic circuits of the power brake system and the ESP system through a coupling valve, allowing them to share hydraulic volume. Instead of maintaining completely separate systems (which would increase complexity), the circuits are combined at a controlled interface, enabling the ESP to access hydraulic volume from the power brake system without requiring additional reservoirs or complex open circuit architecture.
3Productivity
If the ESP system sucks hydraulic volume, then the hydraulic pressure changes, but this may cause suction from the reservoir in closed systems
Solution Approach 1:
The coupling valve is activated in advance when the ESP system is triggered, establishing a controlled hydraulic connection from the power brake system to the ESP system before significant pressure changes occur. This preliminary action ensures that hydraulic volume is supplied through the controlled coupling valve rather than being sucked from the reservoir, preventing the harmful effect of reservoir suction while maintaining rapid pressure build-up.
Solution Approach 2:
The system incorporates pressure sensors and control mechanisms that continuously monitor hydraulic pressure in the power brake system. When the ESP is activated and pressure changes are detected, the control system adjusts the coupling valve to maintain pressure balance and prevent reservoir suction. This feedback control ensures that hydraulic volume is supplied through the controlled interface rather than being drawn from the reservoir, eliminating the harmful effect while maintaining productivity.
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
This approach maintains a constant hydraulic volume, prevents unnecessary pressure changes, and ensures the brake system operates effectively without additional hydraulic volume from the reservoir, allowing for efficient brake pressure build-up and stabilization, even in emergency situations, while saving installation space by eliminating the need for sniffer bores.
Implementation Method 1
a second hydraulic pressure is generated by means of the power brake in order to provide the hydraulic volume at the hydraulic coupling
Implementation Method 2
the system is configured to hydraulically couple the power brake to the driving dynamics control
Data Source
AI summary
A method for controlling a hydraulic volume in a system comprising a power brake and a driving dynamics control. The system is configured to hydraulically couple the power brake to the driving dynamics control. The method includes: providing a signal to build up a first dynamic pressure for the driving dynamics control; generating a first control signal by means of the driving dynamics control, and providing the first control signal to the power brake in order to provide the hydraulic volume at the hydraulic coupling; generating a second hydraulic pressure by means of the power brake in order to provide the hydraulic volume at the hydraulic coupling; providing the hydraulic volume at the second hydraulic pressure at the hydraulic coupling by means of the power brake; and building up the first hydraulic pressure in the driving dynamics control by means of the provided hydraulic volume.