Dual Hydraulic Brake Circuits With Emergency Pressure Takeover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing brake systems lack silence and redundancy, particularly in emergency situations, and there is a need to enhance safety by having redundant components that can take over or replace non-functioning components.
Innovation Solution
A brake system with two hydraulic circuits, each pressurized by a hydraulic pressure supplier, a cut-off valve connecting and separating the circuits based on operating modes, and dual control units ensuring redundancy and silence by allowing one supplier to take over in emergencies, with optional electromagnetic brakes and a master cylinder for backup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake system with two hydraulic pressure suppliers is used to provide redundancy for safety, then reliability is improved, but device complexity increases
Solution Approach 1:
The brake system is divided into two independent hydraulic circuits (first and second circuits), each with its own pressure supplier, control unit, and wheel brakes. This segmentation provides functional redundancy where each circuit can independently perform the braking function, ensuring safety even if one circuit fails, while maintaining manageable complexity through modular design
Solution Approach 2:
The cut-off valve is pre-configured to automatically switch between normal operation mode (separating the circuits) and emergency mode (connecting the circuits) based on system state. This preliminary arrangement of the valve's dual functionality eliminates the need for additional complex switching mechanisms, providing automatic failover capability without increasing device complexity
2Reliability
If the cut-off valve remains closed during normal operation to maintain circuit separation, then reliability is improved, but noise from pressure fluctuations increases
Solution Approach 1:
The cut-off valve dynamically changes its state based on operational requirements: remaining closed during normal operation to maintain circuit separation and reliability, and opening during emergency or pressure balancing modes to connect the circuits. This dynamic behavior allows the system to adapt between reliability and noise reduction needs without compromising either function
Solution Approach 2:
The cut-off valve is designed with multi-functionality to serve multiple purposes: maintaining circuit separation during normal operation, enabling pressure balancing between circuits during emergency modes, and providing a controlled connection path that reduces noise from pressure fluctuations. This universal component eliminates the need for separate valves for each function, reducing overall system complexity
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
The system provides enhanced safety and silence by enabling redundant components to operate in emergencies and maintains pressure balance, reducing noise and ensuring continued functionality even with component failures.
Implementation Method 1
a first hydraulic pressure supplier including an actuator for pressurizing the first hydraulic circuit in a normal operating mode
Implementation Method 2
a cut-off valve hydraulically connecting the first and second hydraulic circuits
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Brake system (1) for a vehicle is provided, comprising a first hydraulic circuit (10) including a first wheel brake (11), a second hydraulic circuit (20) including a second wheel brake (21), a first hydraulic pressure supplier (12) including an actuator for pressurizing the first hydraulic circuit (10) in a normal operating mode, a second hydraulic pressure supplier (22) including an actuator for pressurizing the second hydraulic circuit (20) in the normal operating mode, a cut-off valve (30) hydraulically connecting the first and second hydraulic circuits (10, 20), a first control unit (14) for controlling the cut-off valve (30) and activating the first hydraulic pressure supplier (12) and the second hydraulic pressure supplier (22) depending on a brake request, and a second control unit (24) for controlling the cut-off valve (30) and activating the first hydraulic pressure supplier (12) and the second hydraulic pressure supplier (22) depending on a brake request, wherein the first control unit (14) and/or second control unit (24) are configured for keeping the cut-off valve (30) closed in the normal operation mode and to open the cut-off valve (30) in an emergency mode or in a pressure balancing mode, wherein the first hydraulic pressure supplier (12) is hydraulically connected to both the first hydraulic circuit (10) and the second hydraulic circuit (20) for pressurizing said hydraulic circuits (10, 20) in the emergency mode or wherein the second hydraulic pressure supplier (22) is hydraulically connected to both the first hydraulic circuit (10) and the second hydraulic circuit (20) for pressurizing said hydraulic circuits (10, 20) in the emergency mode.