Clutch Control System Neutral State Load Reduction
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Solution Overview
Problem
Existing automatic transmission systems do not effectively manage clutch control when shifting into a neutral state during engine operation or vehicle running, leading to increased load on transmission gears and potential issues like engine stall and shift shock, and the addition of a clutch actuator increases system weight.
Innovation Solution
A clutch control system that includes an actuator, a controller, engine rotational speed sensor, vehicle speed sensor, and neutral detection unit, which disengages the clutch when engine or vehicle speed exceeds a predetermined value and a neutral state is detected, allowing for reduced load on transmission gears and preventing engine stall and shift shock, while also incorporating a second control unit for partial engagement and disengagement based on continuous neutral state detection and a rotational angle sensor for jump-out situation detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the clutch is kept engaged during neutral state when engine is working or vehicle is running, then the transmission gears are subjected to increased load, but maintaining clutch engagement ensures continuous power transmission
Solution Approach 1:
The clutch engagement state is dynamically adjusted based on transmission state and operating conditions. The control unit automatically disengages the clutch when neutral state is detected during engine working or vehicle running, and re-engages when gear state is detected, optimizing the balance between load reduction and power transmission continuity
Solution Approach 2:
The system uses feedback from the state detection unit to monitor transmission state (neutral or gear) and operating conditions (engine working state, vehicle running state). Based on this feedback, the control unit automatically adjusts clutch engagement, creating a closed-loop control system that responds to real-time conditions
2Reliability
If a clutch actuator is added to control clutch engagement, then clutch control during neutral state is improved, but the system weight increases
Solution Approach 1:
The clutch actuator is designed to perform multiple functions: controlling clutch engagement during normal gear shifting, disengaging clutch during neutral state when engine is working or vehicle is running, and re-engaging clutch when gear state is detected. This multi-functional design justifies the added weight by providing comprehensive clutch control capabilities across different operating scenarios
Data Source
AI summary
The clutch control system includes a motor in a liquid pressure modulator for engagement/disengagement of a clutch, a clutch control unit for controlling the operation of the motor, vehicle condition detection means which detects at least that an engine is in working and which detects the running speed of the vehicle, and neutral detection means for detecting the neutral state of a transmission. As controlled states of the clutch, there are set a first control state in which the clutch is in a partially engaged state or an engaged state, and a second control state in which the clutch is disengaged. When the engine being working and the vehicle speed being in excess of a predetermined value is detected and the neutral state is detected, in the first control state, transition to the second control state is effected and the clutch is disengaged.