Damper Clutch Slip Control for Repetitive Tip-In/Tip-Out
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Solution Overview
Problem
Existing damper clutch protection technologies fail to effectively address overheating caused by repetitive tip-in/tip-out actions, which can lead to damage due to excessive slip and heat generation.
Innovation Solution
A control method and apparatus that determine the occurrence of repetitive tip-in/tip-out actions by monitoring slip power changes and applying increased hydraulic pressure to the damper clutch through a solenoid, using a Transmission Control Unit (TCU) and Engine Control Unit (ECU) to manage the solenoid duty and prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper clutch protection technology based on slip power and duration time control is used, then the damper clutch is protected from overheating under normal conditions, but it cannot respond to slip caused by repetitive tip-in/tip-out actions
Solution Approach 1:
The system performs preliminary detection of tip-in/tip-out actions by monitoring accelerator pedal position changes before significant slip and overheating occur. By identifying the driver's repetitive tip-in/tip-out behavior in advance, the control system can proactively adjust damper clutch control parameters to prevent overheating, rather than reacting after damage thresholds are approached.
Solution Approach 2:
The system continuously monitors accelerator pedal position, calculates slip power, and detects tip-in/tip-out patterns in real-time. This feedback mechanism allows the control system to adapt damper clutch control strategies dynamically based on detected driving patterns, enabling the system to respond appropriately to repetitive tip-in/tip-out actions that were previously undetected.
2Adaptability or versatility
If the damper clutch operates in coasting area or slip area, then the system can handle various driving conditions, but slip exceeds tolerance range causing overheating and damage
Solution Approach 1:
The system dynamically adjusts damper clutch control parameters based on real-time detection of tip-in/tip-out actions. When such actions are detected, the control system modifies duty cycle values and hydraulic pressure application timing to prevent excessive slip, allowing the system to adaptively protect the clutch while still handling various driving conditions.
Solution Approach 2:
The system changes control parameters (duty cycle, hydraulic pressure, engagement timing) based on detected tip-in/tip-out patterns. By modifying these parameters proactively when repetitive accelerator actions are detected, the system prevents slip from exceeding tolerance ranges while maintaining operational versatility across different driving scenarios.
3Reliability
If the slip power and duration time control is applied, then the damper clutch is protected under normal operation, but it fails to prevent overheating during repetitive tip-in/tip-out actions
Solution Approach 1:
The control system integrates multiple functions into a unified tip-in/tip-out detection and response mechanism. By combining accelerator pedal monitoring, slip power calculation, pattern recognition, and proactive control adjustment into a single integrated system, the patent achieves comprehensive protection without proportionally increasing overall system complexity.
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
Prevents overheating and damage to the damper clutch by maintaining a directly connected state or state close to direct connection during repetitive tip-in/tip-out, extending the clutch's lifespan and reducing shift impacts.
Implementation Method 1
a solenoid valve for the damper clutch is operated
Implementation Method 2
slip occurs. Furthermore, when the size of slip of the damper clutch occurring as described above exceeds a set tolerance range or a duration time of the slip exceeds a predetermined time, the overheating of the damper clutch may occur
Data Source
AI summary
In one aspect, a control method and a control apparatus are provided for protecting a damper clutch of a vehicle. In one aspect, the control method of protecting the damper clutch of the vehicle includes determining whether a vehicle state satisfies a condition for operating a damper clutch protection logic, calculating a slip power in real time on the basis of a turbine speed of a torque converter, an engine speed, a capacity coefficient of the torque converter, a clutch torque, and a hydraulic torque when the condition for operating the damper clutch protection logic is satisfied, determining whether a repetitive tip-in/tip-out that is intentionally performed occurs or not on the basis of a change in the slip power that is calculated in real time for a set time, and operating the damper clutch protection logic for restraining a slip of the damper clutch when there is the repetitive tip-in/tip-out that is intentionally performed.