Electromechanical Brake Piston Temperature Compensation
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Solution Overview
Problem
Existing electromechanical braking systems in vehicles face challenges in maintaining consistent braking force due to temperature-related changes in component lengths, which can lead to inefficiencies and potential unintended contact between brake pads and discs, especially during temperature fluctuations while the vehicle is in motion.
Innovation Solution
The method involves dynamically adjusting the position of the brake piston using the electric brake motor based on brake temperature, allowing for temperature compensation by adjusting the braking force directionally to maintain a consistent braking force, even during motion, and preventing overheating by adjusting the piston position accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the brake piston position is fixed after initial tightening, then the device complexity is reduced, but the braking force consistency deteriorates due to temperature-related component length changes
Solution Approach 1:
The brake piston position is made dynamically adjustable through the electric brake motor, allowing the system to adapt to temperature changes. The control unit continuously monitors brake temperature and adjusts the piston position accordingly, transforming a static system into a dynamic one that maintains optimal braking force across varying thermal conditions.
Solution Approach 2:
The system changes the position parameter of the brake piston based on temperature conditions. By adjusting the piston position in response to temperature variations, the system compensates for thermal expansion and contraction of brake components, maintaining consistent braking force without requiring complex mechanical redesign.
2Reliability
If the brake piston is adjusted to compensate for temperature changes, then the braking force consistency is improved, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The system implements a feedback loop where the control unit continuously monitors brake temperature and adjusts the electric brake motor accordingly. This closed-loop control enables automatic compensation for thermal effects without requiring complex mechanical adjustment mechanisms, as the system self-regulates based on real-time temperature data.
Solution Approach 2:
The brake system performs self-adjustment through the electric brake motor, which automatically compensates for temperature-related dimensional changes. The system serves itself by using temperature feedback to maintain optimal piston position and braking force without external intervention or complex mechanical adjustment devices.
3Adaptability or versatility
If the brake piston travel distance is increased due to component contraction at lower temperatures, then the adaptability to temperature changes is improved, but the loss of time increases due to longer adjustment travel
Solution Approach 1:
The control unit proactively adjusts the brake piston position in anticipation of temperature changes or based on predicted thermal conditions. By performing preliminary adjustments before significant temperature drift occurs, the system minimizes the actual travel distance needed during braking events, reducing response time while maintaining adaptability.
Solution Approach 2:
The real-time temperature monitoring and feedback mechanism enables the system to make small, incremental piston position adjustments rather than large corrective movements. This continuous fine-tuning reduces the total travel distance required during actual braking operations, maintaining temperature adaptability while minimizing response time loss.
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 ensures a consistent and timely braking force is maintained, reducing the time between force application and effect, and preventing unintended contact, thus enhancing the reliability and safety of the braking system, especially during automated parking maneuvers and at higher vehicle speeds.
Implementation Method 1
The electric brake motor (13) generates a rotational movement which, by means of a screw (14), causes an axial actuating movement of a brake piston (16)
Implementation Method 2
Temperature-related changes in the length of the components of the electromechanical braking device can be compensated for
Data Source
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AI summary
The invention relates to a method for providing the clamping force that can be generated by an electromechanical brake device in a vehicle, wherein the position of the brake piston is set as a function of the brake temperature when the vehicle is in motion.