Work Vehicle Travel Control Device Clutch Restriction
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Solution Overview
Problem
Existing travel control systems for work vehicles require disabling the engine start restriction to perform stationary tasks, which compromises theft prevention, and do not prevent accidental vehicle movement during such tasks.
Innovation Solution
A travel control device with a power transmission system, a control unit that manages a clutch, and a mobile terminal interface, allowing for enabling or disabling a start restriction mode to prevent clutch engagement when the vehicle is stationary, using a forward/reverse lever and authentication codes to manage power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the engine start restriction is disabled to perform stationary tasks, then the vehicle can operate stationary implements, but the theft prevention function is compromised
Solution Approach 1:
The patent segments the restriction system into two independent parts: engine start restriction and clutch engagement restriction. The engine can start normally for stationary work while the clutch remains restricted to prevent vehicle movement. This allows stationary task performance without compromising theft prevention, as the vehicle cannot be driven even though the engine runs.
Solution Approach 2:
The patent implements dynamic control of the clutch restriction based on vehicle state. When the vehicle is detected to be in motion, the clutch restriction is automatically released to allow normal operation. When stationary, the restriction remains active. This dynamic adjustment enables the system to adapt between theft prevention mode and stationary work mode without manual intervention.
2Reliability
If the clutch restriction is maintained during stationary work, then theft prevention is preserved, but the vehicle cannot be operated for any tasks
Solution Approach 1:
The patent separates engine control from transmission control. The engine management system allows starting and running regardless of restriction status, while the transmission control system independently manages clutch engagement based on motion detection. This segmentation enables the engine to power stationary implements while the clutch restriction prevents vehicle movement.
Solution Approach 2:
The motion detection system acts as an intermediary that mediates between the restriction mode and clutch control. When motion is detected, it automatically releases the clutch restriction; when stationary, it maintains the restriction. This intermediary enables automatic adaptation between security mode and work mode based on vehicle state.
3Ease of operation
If the start restriction mode is disabled using mobile terminal, then clutch engagement is allowed, but accidental vehicle movement cannot be prevented
Solution Approach 1:
The patent implements dynamic clutch restriction control that automatically adjusts based on detected vehicle motion. When the vehicle starts moving, the restriction is automatically released to allow normal clutch operation. When stationary, the restriction remains active. This prevents accidental movement during stationary work while allowing intentional operation when the vehicle is in motion.
Solution Approach 2:
The system uses feedback from motion detection sensors to automatically adjust clutch restriction status. The detection unit continuously monitors vehicle motion and provides feedback to the control unit, which automatically releases or maintains restriction based on the detected state. This feedback mechanism prevents accidental movement while enabling safe operation.
4Reliability
If the forward/reverse lever is restricted during start restriction mode, then vehicle movement is prevented, but the operator cannot position the vehicle
Solution Approach 1:
The patent implements dynamic restriction control that automatically releases when motion is detected. During stationary positioning, the restriction remains active to prevent unauthorized movement. Once the vehicle starts moving for positioning purposes, the restriction automatically releases, allowing the operator to freely control the forward/reverse lever for precise positioning maneuvers.
Data Source
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AI summary
A work vehicle with a travel control device that allows stationary work without disabling a theft-prevention state of the vehicle is provided. The work vehicle includes an engine, a power transmission device having a clutch for transmitting rotational power of the engine to drive wheels, a travel control device for controlling the clutch in the power transmission device and having a start restriction mode for restricting engagement of the clutch when electrical power is turned on, a mobile terminal configured to transmit signals for enabling and disabling the start restriction mode, and a control unit configured to transmit and receive signals to and from the mobile terminal.