Brake Valve Drive Circuit Isolation Against Backward Voltage Faults
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Solution Overview
Problem
Conventional brake control systems for vehicles suffer from a loss of entire system function when a common mode fault occurs between the main ECU and the redundant ECU, particularly due to overvoltage or short circuit in valve drive circuits.
Innovation Solution
The proposed apparatus for brake control includes separate valve drive circuits with backward voltage prevention elements to prevent faults in one circuit from affecting others, ensuring that each circuit operates independently to maintain braking functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If valve drive circuits are connected to a common power source without isolation, then circuit simplicity is improved, but fault transmission between circuits occurs due to overvoltage or short circuit
Solution Approach 1:
The patent introduces backward voltage prevention elements (such as diodes or MOSFETs) as intermediary components between the power source and each valve drive circuit. These elements act as isolators that allow normal power distribution while blocking fault propagation, thus maintaining both circuit simplicity and fault isolation capability.
2Reliability
If backward voltage prevention elements are added to each valve drive circuit, then fault isolation between circuits is improved, but device complexity increases
Solution Approach 1:
The patent applies backward voltage prevention elements selectively at critical points where fault propagation could occur, rather than throughout the entire system. Each element is placed locally between the power source and individual valve drive circuits, providing targeted protection while minimizing 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
This solution effectively prevents faults from being transmitted across valve drive circuits, thereby maintaining braking force and enhancing the fail-safe performance and safety of the brake control system.
Implementation Method 1
a first backward voltage prevention element disposed between a power source of the first valve driving circuit and the first valve driving circuit to block backward voltage generated on the power source side of the first valve driving circuit
Data Source
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AI summary
An apparatus for brake control may include a first valve group comprising valves included in a hydraulic circuit configured to supply hydraulic pressure for braking of a vehicle; a first valve drive circuit configured to drive the valves comprised in the first valve group; a first backward voltage prevention element connected between a power source and the first valve drive circuit to block backward voltage generated at a power source side of the first valve drive circuit; a second valve group included in the hydraulic circuit and comprising valves included in the hydraulic circuit; a second valve driving circuit configured to drive the valves comprised in the second valve group; and a second backward voltage prevention element connected between a power source and the second valve drive circuit to block backward voltage generated at a power source side of the second valve drive circuit.