Work Vehicle Control Unit Speed-Adaptive Joystick Timing
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Solution Overview
Problem
The impact of operating a front work machine, such as a boom or bucket, on a wheel loader while traveling disrupts the balance of the vehicle, leading to decreased work efficiency.
Innovation Solution
An apparatus that includes a speed sensor, an electric main controller valve, and a control unit to adjust the output current for the proportional valve based on the vehicle's speed, allowing for adaptive control of the work machine's operation to minimize impact during travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the work machine is operated rapidly and precisely, then the responsiveness to operator input is improved, but the impact on the traveling vehicle increases
Solution Approach 1:
The control system dynamically adjusts the end time point of work machine operation based on the vehicle's traveling speed. When the vehicle travels at high speed, the system delays the end time point of work machine operation, thereby softening the impact on the vehicle. When the vehicle is stationary or moving slowly, the system uses the normal end time point to maintain precise and rapid control responsiveness.
Solution Approach 2:
The system changes the temporal parameter (end time point) of the work machine operation based on the vehicle's speed parameter. By comparing the current speed with a predetermined threshold, the control unit adjusts the timing parameter of the hydraulic valve control signal, thereby adapting the operation characteristics to match the vehicle's motion state and reduce harmful impacts.
2Object-affected harmful factors
If the end time point of work machine operation is delayed, then the impact on the traveling vehicle is reduced, but the work efficiency decreases
Solution Approach 1:
The system dynamically adjusts the end time point of work machine operation based on the vehicle's traveling speed. When the vehicle travels at high speed, the system delays the end time point of work machine operation, thereby softening the impact on the vehicle. When the vehicle is stationary or moving slowly, the system uses the normal end time point to maintain precise and rapid control responsiveness.
Solution Approach 2:
The system changes the temporal parameter (end time point) of the work machine operation based on the vehicle's speed parameter. By comparing the current speed with a predetermined threshold, the control unit adjusts the timing parameter of the hydraulic valve control signal, thereby adapting the operation characteristics to match the vehicle's motion state and reduce harmful impacts.
Data Source
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AI summary
An exemplary embodiment suggested in the present disclosure relates to an apparatus and a method of controlling a work machine of a work vehicle. The apparatus for controlling a work machine of a work vehicle suggested in the present disclosure measures a speed of a work vehicle, converts an input signal of a joystick into an output current for controlling a proportional valve (P/V) for operating a work machine (for example, a boom and a bucket), compares the speed of the work vehicle with a reference speed, and advances or delays an end time point or an operation time point of the work machine, thereby controlling an impact applied to the work vehicle.