Tractor Clutch Threshold Control for Stable Half-Clutch Operation
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Solution Overview
Problem
Existing tractor systems face issues with clutch mechanism galling due to inappropriate half-clutch states, particularly affecting operators with varying physique or experience, as they often rely on detecting the half-clutch state and outputting warnings without adjusting the clutch operation accordingly.
Innovation Solution
A working vehicle with a clutch system that includes a detector for the clutch pedal position, a control device to adjust the clutch state based on detected values, and a change unit to modify a threshold value for improved clutch operation, allowing for customizable sensitivity settings through an operation member, enabling adjustment of the half-clutch stroke length and enhancing operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the clutch system uses a fixed threshold for half-clutch detection, then the control logic is simple, but it cannot accommodate operators with different physique or experience, leading to clutch mechanism galling
Solution Approach 1:
The patent applies dynamics by making the threshold value adjustable rather than fixed. The threshold can be dynamically changed based on operator input through the operation member, allowing the system to adapt to different operators' physique and experience while maintaining a relatively simple control structure.
Solution Approach 2:
The patent changes the parameter (threshold value) of the clutch control system to accommodate different operators. By allowing the threshold to be adjusted through the operation member, the system becomes versatile without requiring a completely complex redesign, thus resolving the contradiction between adaptability and device complexity.
2Reliability
If the clutch pedal threshold is fixed, then the system structure is simple, but it causes clutch mechanism galling when the half-clutch position is inappropriate for the operator
Solution Approach 1:
The patent changes the threshold parameter based on operator input, allowing the half-clutch position to be adjusted for different operators. This improves reliability by preventing clutch mechanism galling while maintaining ease of operation through the simple interface of the operation member.
3Ease of operation
If the threshold value is fixed, then the control device is simple, but it cannot improve operability for operators with varying physique or experience
Solution Approach 1:
The patent makes the threshold value dynamic and adjustable through the operation member, improving ease of operation for different operators while keeping the control device relatively simple in structure.
Data Source
AI summary
A working vehicle includes: a clutch displaceable to a connected state in which power is transmitted to a drive, a disconnected state in which the transmission is disconnected, and a half-clutch state in which power is slidably and partly transmitted to the drive; a detector that detects an operation position of a clutch pedal and outputs a detected value corresponding to the operation position detected; a control device that brings the clutch into the half-clutch state if the detected value corresponds with a threshold, and brings the clutch into the disconnected state if the detected value is less than the threshold and into the connected state if the detected value is greater than the threshold, and vice versa; and a change unit that changes the threshold to a different value in accordance with an operation on the operation member.