Clutch Control Device Using Drive Wheel Rotation Detection
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Solution Overview
Problem
Existing clutch control devices face challenges in maintaining stable clutch control at the start of drive wheel rotation due to variations in clutch quality and increased friction in the driving force transmission system, leading to potential delays in response and shifting feel.
Innovation Solution
A clutch control device that calculates a control correction amount based on the difference between the detected clutch control amount at the start of drive wheel rotation and a predetermined reference value, applying this correction to adjust the clutch control amount to ensure stable operation, including features like drive wheel rotation detection, inclination angle sensing, and brake operation monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clutch control amount is increased to compensate for clutch wear and friction variations, then clutch engagement reliability is improved, but response delay and unstable shifting feel occur
Solution Approach 1:
The system dynamically changes the clutch control amount parameter based on detected drive wheel rotation characteristics. By monitoring the relationship between clutch control amount and drive wheel rotation start timing, the system adjusts the clutch control amount to optimal values, preventing both response delay and unstable engagement
Solution Approach 2:
The system establishes a feedback loop by detecting drive wheel rotation start timing and comparing it with the applied clutch control amount. This feedback mechanism allows the system to identify variations in clutch characteristics and automatically adjust the clutch control amount to maintain reliable engagement without response delay
2Stability of the object's composition
If clutch control amount is adjusted to account for manufacturing variations and friction increase, then shifting feel stability is improved, but control system complexity increases
Solution Approach 1:
The clutch control system performs self-adjustment by automatically detecting variations in its own operation characteristics through drive wheel rotation monitoring. The system self-corrects clutch control amounts based on detected anomalies, eliminating the need for external calibration or complex manual adjustment mechanisms
Solution Approach 2:
The system uses drive wheel rotation detection as an intermediary indicator to infer clutch engagement characteristics. By monitoring the relationship between clutch control and drive wheel response, the system indirectly measures clutch health and friction variations without requiring direct sensors on the clutch components themselves
Data Source
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AI summary
To provide a clutch control device which can calculate a control correction amount according to a clutch control amount at starting of rotation of a drive wheel and can properly correct the clutch control amount by using the control correction amount calculated above. In driving a clutch in its engaging direction at starting a vehicle, drive wheel rotation start detecting means (160) detects the timing at which a first counter pulse is output from a vehicle speed sensor (181) as the timing of start of rotation of the drive wheel. A control correction value for the clutch is calculated according to the difference between a clutch control current value detected at this rotation start timing and a predetermined reference value. The clutch control correction value is calculated by using a target clutch capacity correction coefficient H derived by target clutch capacity correction coefficient deriving means (120) and an invalid stroke filling oil pressure p derived by invalid stroke filling oil pressure deriving means (140). A shift control section (100) applies this control correction value to a control current value for a valve (42) to thereby control a first clutch (CL1) and a second clutch (CL2).