Lockup Clutch Control Device for Vehicle Slip Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lockup clutch control devices cause occupant discomfort due to rotation fluctuations, noise, and vibrations when consistently engaging or disengaging the lockup clutch during slip control, as they fail to properly manage clutch temperature and motor state conditions.
Innovation Solution
A control device and method that execute slip control by matching target slip speeds through half engagement of the lockup clutch, determining full engagement or disengagement based on clutch temperature and motor state, and stopping slip control by fully engaging or disengaging the lockup clutch to minimize discomfort-causing fluctuations and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lockup clutch is consistently engaged during slip control to protect the clutch, then clutch durability is improved, but occupant comfort deteriorates due to rotation fluctuations, noise, and vibrations
Solution Approach 1:
The lockup clutch engagement state is dynamically adjusted based on real-time motor state and temperature conditions. The system transitions between engaged, disengaged, and slip control states according to operating conditions, rather than maintaining a fixed engagement state, thereby resolving the contradiction between durability protection and comfort maintenance
2Reliability
If lockup clutch is consistently disengaged during slip control to protect the clutch, then clutch durability is improved, but occupant comfort deteriorates due to motor rotation fluctuations, vibrations, and noise
Solution Approach 1:
The system dynamically selects between engagement and disengagement states based on motor operating conditions. When motor state indicates stability, the clutch is disengaged for protection; when instability is detected, the system transitions to engaged or slip control state to maintain comfort, thus resolving the contradiction adaptively
3Temperature
If slip control is stopped early to protect the clutch, then clutch temperature is controlled, but occupant comfort deteriorates due to unmanaged motor fluctuations
Solution Approach 1:
The system continuously monitors motor state and uses this feedback to determine the optimal timing for stopping slip control. By evaluating real-time motor conditions, the system decides when temperature protection should take precedence and when comfort maintenance should be prioritized, resolving the contradiction through adaptive feedback control
Data Source
AI summary
A control device for a lockup clutch of a vehicle. A slip control device executes slip control to make a rotational speed difference between the input member and the input shaft match a target slip speed according to a state of the vehicle by half engagement of the lockup clutch. A clutch temperature obtaining means obtains a clutch temperature of the lockup clutch. A determining means determines if the lockup clutch should be fully engaged or disengaged based on at least a state of the motor if the clutch temperature becomes equal to or higher than a predetermined temperature during execution of the slip control. A slip control stop means for stopping the slip control by fully engaging or disengaging the lockup clutch according to the determination result of the determining means.