Hydraulic Clutch Control System for Accurate Piston Stroke Detection
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Solution Overview
Problem
Existing hydraulic clutch control systems face challenges in accurately detecting the clutch piston idle stroke and determining the hydraulic pressure needed for complete engagement, leading to slow clutch response and susceptibility to pressure fluctuation noise.
Innovation Solution
A hydraulic clutch control system that includes a primary hydraulic pressure signal generation unit, a secondary hydraulic pressure signal generation unit, a hydraulic pressure control unit, a detection unit, and a piston stroke judgment unit, which together regulate and control hydraulic pressure to accurately detect the clutch piston stroke and initiate power transmission without complete engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If second-order differentiation of hydraulic clutch pressure is used to detect clutch piston idle stroke completion, then detection method is established, but measurement precision deteriorates due to susceptibility to pressure fluctuation noise
Solution Approach 1:
A vibration isolation member is introduced as an intermediary component between the clutch piston and the pressure detection system. This member isolates the detection system from high-frequency pressure fluctuations caused by clutch engagement vibrations, allowing accurate detection of the idle stroke completion point without being affected by noise
Solution Approach 2:
The system performs preliminary detection of the clutch piston idle stroke completion point by monitoring hydraulic pressure changes before full clutch engagement occurs. This allows the control system to prepare for power transmission initiation in advance, improving response speed while maintaining detection accuracy through careful timing of the detection action
2Measurement precision
If clutch complete engagement is required to determine idle stroke completion, then engagement point is accurately identified, but productivity deteriorates due to slow clutch response
Solution Approach 1:
The system detects the clutch piston idle stroke completion point preliminarily by monitoring hydraulic pressure changes during the engagement process, before complete clutch engagement occurs. This preliminary detection allows the control system to initiate power transmission earlier, improving clutch response speed while maintaining accurate identification of the engagement point
Solution Approach 2:
The system continuously monitors hydraulic pressure changes and provides feedback to determine when the clutch piston idle stroke is complete. This feedback mechanism allows real-time detection of engagement status without requiring full clutch engagement, enabling faster response while maintaining precision through continuous monitoring
3Ease of operation
If hydraulic pressure is limited to first level during predetermined time period, then clutch engagement control is achieved, but loss of time increases due to gradual pressure increase requirement
Solution Approach 1:
The system applies a preliminary hydraulic pressure (first level) during a predetermined time period before full engagement, allowing the clutch piston to move to the correct position and eliminate clearance. This preliminary action prepares the system for rapid full engagement, reducing overall engagement time while maintaining ease of control during the transition phase
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 system enables precise detection of the clutch piston stroke and engagement point, improving clutch response and reducing noise susceptibility, allowing for accurate power transmission and system versatility.
Implementation Method 1
a hydraulic circuit that supplies a hydraulic pressure to a piston of the clutch so as to cause a stroke of the piston for engagement of the clutch
Implementation Method 2
a detection unit that detects the amount of fluctuations in the hydraulic pressure
Data Source
AI summary
A hydraulic clutch control system includes a clutch, a hydraulic circuit that supplies a hydraulic pressure to a piston of the clutch so as to cause a stroke of the piston for engagement of the clutch, a primary hydraulic pressure signal generation unit that generates a primary hydraulic pressure signal to regulate a magnitude of the hydraulic pressure, a secondary hydraulic pressure signal generation unit that generates a secondary hydraulic pressure signal to induce fluctuations in the hydraulic pressure, a hydraulic pressure control unit that operates the hydraulic circuit to control the hydraulic pressure according to the primary and secondary hydraulic pressure signals, a detection unit that detects the amount of fluctuations in the hydraulic pressure and a piston stroke judgment unit that judges the piston stroke based on the hydraulic pressure fluctuation amount.