Electromechanical Parking Brake Release With Adaptive Current Timing
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Solution Overview
Problem
Existing electromechanical parking brake systems release duration is excessive and not adjusted to the actual state of the brake, leading to prolonged and inconvenient operation.
Innovation Solution
A motor control unit that incorporates temperature and hydraulic-pressure sensors to adjust the release duration based on real-time measurements, ensuring precise and efficient brake release by prolonging the electric current supply only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed-duration electrical command is supplied to guarantee complete brake release under all circumstances, then reliability of brake release is improved, but the release duration becomes excessive and reduces ease of operation
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed-duration command to a dynamic adaptive command duration. The release command duration is continuously adjusted based on real-time feedback from temperature sensors and hydraulic pressure sensors, allowing the system to adapt the command duration to actual brake conditions rather than using a predetermined fixed duration.
Solution Approach 2:
The patent implements feedback by using temperature sensors and hydraulic pressure sensors to continuously monitor brake conditions during the release process. The motor control unit receives this feedback information and adjusts the electrical command duration accordingly, creating a closed-loop control system that ensures complete release while minimizing unnecessary duration.
2Reliability
If a prolonged electrical command duration is used to ensure complete brake release, then reliability is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts the electrical command duration based on actual brake conditions monitored by temperature and hydraulic pressure sensors. This prevents unnecessary prolonged command application when the brake is already sufficiently released, thereby reducing energy consumption while maintaining release completeness.
Solution Approach 2:
Through continuous feedback from sensors monitoring temperature and hydraulic pressure, the control unit can detect when brake release is complete and terminate the electrical command promptly, avoiding continued energy consumption that would occur with fixed-duration commands.
3Device complexity
If a fixed electrical command duration is supplied without considering brake state, then device complexity is reduced, but adaptability to different brake conditions deteriorates
Solution Approach 1:
The motor control unit is designed to perform multiple functions: it not only supplies electrical commands to the motor but also continuously processes sensor data from temperature and hydraulic pressure sensors to adaptively determine command duration. This multi-functionality allows the system to handle various brake conditions without requiring separate control systems.
Solution Approach 2:
The control system incorporates feedback mechanisms that allow it to automatically adapt to different brake conditions (temperature, hydraulic pressure) without manual intervention or complex mechanical adjustments, achieving adaptability through intelligent processing of sensor feedback.
Data Source
AI summary
The releases of an electromechanical parking brake are controlled by measuring the change in the intensity (I) of the electrical current provided to the control motor, or a function derived from this intensity, and by extending the release of the brake only for a determined duration (Δt) after stabilization of this intensity, in order not to unnecessarily increase the idle travel of the brake actuator nor to extend the duration of the control. The determined duration (Δt) also depends on the temperature and on the hydraulic pressure in the brake.