Redundant Brake Circuit Layout for Compact Vehicle Brake Units
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Solution Overview
Problem
Conventional vehicle brake devices with redundant components and complex circuitry due to multiple ECUs result in increased size and complexity, necessitating a solution to reduce the overall dimensions while maintaining functionality.
Innovation Solution
The vehicle brake device incorporates a design where each electric element is paired with a dedicated circuit sector, allowing for closer proximity of the element to its controlling circuit, reducing the distance and complexity of electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent electric motors, electrically powered cylinder devices, and electromagnetic valves are provided in correspondence with each of the two ECUs to have redundancy, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the control circuits for both ECUs onto a single circuit board, with the first circuit controlling the first ECU's components and the second circuit controlling the second ECU's components. This consolidation reduces the number of separate control units while maintaining redundant functionality, thereby improving reliability without proportionally increasing device complexity.
2Adaptability or versatility
If various electromagnetic valves and other components are arranged away from the corresponding ECUs to fit within limited space, then adaptability to space constraints is improved, but device complexity increases due to complicated circuit board shapes and increased wiring
Solution Approach 1:
The circuit board is divided into distinct first and second sectors, with each sector dedicated to controlling specific components (first ECU's electromagnetic valves and second ECU's electromagnetic valves). This segmentation allows for organized wiring and simplified circuit board design while accommodating space constraints through functional zoning.
Solution Approach 2:
The patent implements local quality by assigning specific control functions to specific regions of the circuit board. The first circuit in the first sector controls the first electric motor, first electrically powered cylinder device, and first electromagnetic valves, while the second circuit in the second sector controls the corresponding second components. This localized control reduces wiring complexity and improves signal integrity.
Data Source
AI summary
A vehicle brake device includes a first electric motor, a first electrically powered cylinder device, a first electromagnetic valve, and a first pressure sensor serving as first elements, a second electric motor, a second electrically powered cylinder device, a second electromagnetic valve, and a second pressure sensor serving as second elements, and a circuit board in which a first sector in which a first circuit for controlling the first element is formed and a second sector in which a second circuit for controlling the second element is formed are arranged side by side. In the vehicle brake device, the first element controlled only by the first circuit is disposed so as to face the first sector, and the second element controlled only by the second circuit is disposed so as to face the second sector.