Electric Braking Device Hysteresis Control
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Solution Overview
Problem
Conventional electric braking devices for vehicles fail to accurately adjust power supply to the electric motor based on varying hysteresis characteristics, leading to inefficient current consumption and potential reduction in braking force due to changes in friction coefficients over time and temperature.
Innovation Solution
An electric braking device that includes a control means to detect hysteresis characteristics at regular intervals and adjust the power supply amount to the electric motor to maintain a minimum value necessary for maintaining the braking force, thereby reducing current consumption without lowering the braking force, and includes features like automatic hysteresis characteristic detection and pressing force increasing control to prevent braking force reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the power supply amount is reduced based on pre-acquired hysteresis characteristics, then current consumption is reduced, but braking force may be insufficient when actual hysteresis characteristics vary
Solution Approach 1:
The system performs preliminary detection of hysteresis characteristics at regular intervals to acquire updated characteristic data before normal braking operation. This preliminary action allows the control means to have current and accurate hysteresis information available, enabling optimal power supply adjustment that reduces current consumption while ensuring braking force sufficiency.
Solution Approach 2:
The system implements feedback by detecting hysteresis characteristics during operation and using this detected information to adjust the power supply amount. The control means continuously monitors and updates hysteresis characteristics, then feeds this information back into the power supply control to maintain optimal braking performance with minimized current consumption.
2Use of energy by moving object
If the power supply amount is reduced within the range of pre-acquired hysteresis characteristics, then current consumption is reduced, but braking force may be reduced when actual hysteresis range is smaller
Solution Approach 1:
The system dynamically adjusts the power supply amount based on real-time detected hysteresis characteristics rather than relying on fixed pre-acquired data. The control means modifies the power supply level according to the currently detected hysteresis range, ensuring that braking force requirements are always met while minimizing current consumption adaptively.
Solution Approach 2:
The system changes the operating parameters by updating hysteresis characteristic data at regular intervals. By detecting and incorporating changes in hysteresis parameters, the control means can accurately determine the appropriate power supply amount that maintains sufficient braking force while optimizing current consumption under varying operating conditions.
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 solution ensures reliable reduction in current consumption while maintaining the braking force by dynamically adjusting the power supply based on real-time hysteresis characteristics, preventing braking force reduction and optimizing energy efficiency.
Implementation Method 1
an electric motor (MTR) generating power
Implementation Method 2
a friction member (MSB) pressed against a rotating member (KTB) by a pressing member (PSN)
Implementation Method 3
a power transmitting mechanism (INP, GSK, SFT, NJB) configured to transmit the power generated by the electric motor to the pressing member
Data Source
AI summary
Provided is an electric braking device that transmits power generated by an electric motor MTR to a pressing member PSN and causes pressing force to be generated by the pressing member PSN with respect to a friction member MSB. Hysteresis characteristics in the relation between the power supply amount to the electric motor and the pressing force of the pressing member are detected each time a predetermined point in time arrives. Upon determination of a “holding state in which the pressing force is held constant”, a minimum value for a power supply amount that makes it possible to maintain the current pressing force is obtained on the basis of the most recently detected hysteresis characteristics and the power supply amount is set to a value determined on the basis of the obtained minimum value for the power supply amount.