Brake Lubrication Control via Dynamic Delay Timing
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Solution Overview
Problem
Existing brake device lubrication systems face challenges in effectively managing lubricant supply to prevent overheating and loss of driving force, particularly when switching between braking and released states, as existing methods either lead to overheating due to inadequate lubricant reduction or result in unnecessary power loss by maintaining high lubricant supply to prevent overheating.
Innovation Solution
A lubrication device with a control unit that includes a braking timer, release timer, and storage unit to adjust lubricant supply based on a delay time corresponding to the braking time, reducing lubricant amount only when the release time reaches the calculated delay time, and optionally correcting for previous braking times to account for residual heat effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the supply amount of lubricant is reduced when the brake device is in the released state, then loss of driving force is suppressed, but overheating may occur when the rotating member is in a high-temperature state
Solution Approach 1:
The lubricant supply amount is dynamically adjusted based on the rotational speed of the rotating member. The control unit increases the lubricant supply amount when the rotational speed exceeds a predetermined threshold, ensuring adequate cooling when heat generation is high, and reduces the supply amount when rotational speed is low to minimize driving force loss. This dynamic adjustment resolves the contradiction by adapting lubricant supply to actual operating conditions.
Solution Approach 2:
The system changes the parameter of lubricant supply amount based on the rotational speed parameter. When the rotational speed is high, indicating high heat generation, the lubricant supply amount is increased to prevent overheating. When the rotational speed is low, the lubricant supply amount is reduced to suppress loss of driving force. This parameter-based control strategy effectively manages the trade-off between cooling performance and energy efficiency.
2Temperature
If the supply amount of lubricant is set to a large value to prevent overheating, then overheating is suppressed, but loss of driving force increases
Solution Approach 1:
The lubricant supply amount is dynamically adjusted based on the rotational speed of the rotating member. The control unit increases the lubricant supply amount when the rotational speed exceeds a predetermined threshold, ensuring adequate cooling when heat generation is high, and reduces the supply amount when rotational speed is low to minimize driving force loss. This dynamic adjustment resolves the contradiction by adapting lubricant supply to actual operating conditions.
Solution Approach 2:
The system changes the parameter of lubricant supply amount based on the rotational speed parameter. When the rotational speed is high, indicating high heat generation, the lubricant supply amount is increased to prevent overheating. When the rotational speed is low, the lubricant supply amount is reduced to suppress loss of driving force. This parameter-based control strategy effectively manages the trade-off between cooling performance and energy efficiency.
3Loss of energy
If the supply amount of lubricant is immediately reduced when the brake device is switched from braking to released state, then loss of driving force is suppressed, but overheating may occur due to residual heat
Solution Approach 1:
The lubricant supply amount is dynamically adjusted based on the rotational speed of the rotating member rather than simply responding to brake state changes. This ensures that even when the brake is released, if the rotational speed remains high indicating residual heat, the lubricant supply is maintained at an adequate level to prevent overheating, while still reducing supply compared to continuous high-volume flow.
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 effectively suppresses overheating and loss of driving force by optimizing lubricant supply based on actual heat generation and braking history, ensuring efficient power transmission and cooling.
Implementation Method 1
A lubrication device therefore cools the rotating member by feeding lubricant between the rotating member and the fixed member, and keeps the temperature of the rotating member from increasing
Implementation Method 2
braking force is generated by the pressing together of a rotating member which rotates together with an output shaft, and a fixed member which is fixed to the vehicle body side, and friction generates heat in the rotating member
Data Source
AI summary
A brake device lubrication device includes a lubricant supply unit and a control unit. The control unit includes a braking timer, a release timer and a storage unit. The control unit is configured to control the lubricant supply unit so as to supply a predetermined first supply amount of lubricant to a brake device when the brake device is in a braking state, to acquire a delay time corresponding to a braking time counted by the braking timer from a relationship of correspondence between the braking time and the delay time stored by the storage unit when the brake device is switched from the braking state to a released state, and to switch a supply amount of lubricant from the first supply amount to a second supply amount which is smaller than the first supply amount when the release time counted by the release timer reaches the acquired delay time.