Multi-Winding Brake Actuation to Prevent Pawl Misblocking
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Solution Overview
Problem
Existing electromechanical vehicle brakes can unintentionally block actuation due to incorrect energization of the pawl mechanism, leading to either continuous braking or failure to apply braking force when needed.
Innovation Solution
A braking device with an electromagnetic coil having multiple independently energizable coil windings and a resetting element, where the total magnetic force exceeds the resetting force only when all coil windings are energized simultaneously, ensuring proper actuation and preventing unintentional blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single coil is used to actuate the pawl, then the device complexity is reduced, but the reliability decreases due to risk of unintentional blocking
Solution Approach 1:
The electromagnetic coil is divided into multiple independent coil segments (first coil segment, second coil segment, etc.), each capable of being energized independently. This segmentation allows the system to require simultaneous activation of multiple segments for pawl actuation, thereby preventing unintentional blocking while maintaining a relatively simple overall device structure.
2Ease of operation
If the pawl is easily actuated by a single coil, then the ease of operation is improved, but the safety decreases due to risk of incorrect actuation
Solution Approach 1:
The system requires preliminary simultaneous energization of multiple coil segments before the pawl can be actuated. This preliminary multi-condition action ensures that accidental or incorrect actuation cannot occur, as all specified coils must be energized at the same time for the pawl to move and engage the gear wheel.
3Object-affected harmful factors
If multiple coil windings are used to prevent incorrect actuation, then the safety is improved, but the use of energy increases
Solution Approach 1:
The system uses multiple coil segments that can be partially energized without causing actuation. Only when all required segments are simultaneously energized does the combined magnetic force become sufficient to move the pawl. This partial action capability allows for energy-efficient operation where full actuation energy is only consumed when all conditions are met, preventing wasteful energy consumption from incorrect actuation attempts.
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 that the braking device can be actuated correctly even if individual coil windings are incorrectly energized, preventing unwanted blocking and maintaining the ability to apply braking force as needed.
Implementation Method 1
an electromagnetic coil having at least two coil windings, which can be energized independently of one another and which are each designed to generate a magnetic force for the actuatable member in an actuating direction in the energized state
Implementation Method 2
a resetting element, which exerts a force on the actuatable member in a resetting direction opposite to the actuating direction
Data Source
AI summary
The disclosure relates to a braking device having an actuatable member, an electromagnetic coil having at least two coil windings, which can be energized independently of one another and which are each designed to generate a magnetic force for the actuatable member in an actuating direction in an energized state, and a resetting element, which exerts a force on the actuatable member in a resetting direction opposite to the actuating direction. The at least two coil windings and the resetting element are designed in such a way that the magnitude of the total magnetic force of all the coil windings exceeds the magnitude of the force of the resetting element only when all the coil windings are energized simultaneously. The disclosure further relates to a method for operating a braking device.