Work Vehicle Implement Control via Hydraulic Feedback
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Solution Overview
Problem
Existing work vehicles lack efficient automatic control systems for synchronizing the implement direction and arm height to predefined reference values, which is essential for precise load handling and implement positioning.
Innovation Solution
A work vehicle system comprising a joint, an implement, an arm assembly, hydraulic cylinders, and sensors, controlled by a controller that adjusts the implement direction and arm height using hydraulic circuits and posture detection sensors to align with predefined reference directions and heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If automatic control is implemented to change implement direction and arm height to reference values, then positioning precision is improved, but control system complexity increases
Solution Approach 1:
The control system continuously monitors the current implement direction and arm height using detection sensors, compares these values with reference values stored in memory, and automatically adjusts the hydraulic cylinders to eliminate deviations. This closed-loop feedback mechanism achieves precise positioning without requiring complex manual coordination.
Solution Approach 2:
The system performs self-correction by automatically detecting positioning deviations and adjusting the implement and arm assembly without external intervention. The control circuitry autonomously manages the hydraulic actuators to maintain reference positions, reducing the need for complex external control mechanisms.
2Measurement precision
If implement direction is changed to reference direction when arm height reaches target height greater than reference height, then load handling accuracy is improved, but control sequence complexity increases
Solution Approach 1:
The control system first raises the arm assembly to a target height that is greater than the reference height before adjusting the implement direction. This preliminary positioning ensures that the implement is at an optimal height for accurate directional alignment, improving overall load handling precision.
Solution Approach 2:
The control system dynamically adjusts the control sequence based on the interdependence of arm height and implement direction. By recognizing that implement direction changes are most accurate when performed from a specific height position, the system optimizes the control sequence to first achieve the target height, then adjust direction, ensuring precise load handling.
3Productivity
If automatic control system is added to synchronize implement direction and arm height, then operational efficiency is improved, but device complexity increases
Solution Approach 1:
The control system merges the control of multiple hydraulic cylinders into a unified automated system. By integrating the control of the first hydraulic cylinder (implement direction) and the second hydraulic cylinder (arm height) under a single control circuitry that coordinates both actuators simultaneously, the system achieves synchronized operation and improved productivity.
Solution Approach 2:
The control circuitry serves multiple functions: it stores reference values in memory, detects current positions using sensors, compares actual positions with reference values, and controls both hydraulic cylinders. This multi-functional controller reduces the need for separate control mechanisms, balancing automation benefits with system simplicity.
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
The system enables precise automatic control of the implement direction and arm height, ensuring accurate positioning and handling of loads, thereby improving operational efficiency and reducing manual intervention.
Implementation Method 1
The hydraulic circuit is configured to control the first hydraulic cylinder and the second hydraulic cylinder
Implementation Method 2
The implement posture detection sensor is configured to detect the implement direction
Implementation Method 3
The arm posture detection sensor is configured to detect the arm height
Data Source
AI summary
A work vehicle includes a memory configured to store first information corresponding to a reference direction which is a standard of an implement direction, and second information corresponding to a reference height which is a standard of an arm height, an input device configured to receive an instruction to perform automatic control for changing the implement direction and the arm height respectively to the reference direction and the reference height, and control circuitry configured to control the hydraulic circuit so that the arm height and the implement direction respectively approach the reference height and the reference direction in response to the instruction received by the input device. The control circuitry is configured to control a hydraulic circuit so that during the automatic control, the implement direction is changed to the reference direction when the arm height reaches a target height which is greater than the reference height.