Front Loader Control Adaptation for Material-Dependent Hydraulic Flow
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Solution Overview
Problem
Less experienced operators may inefficiently perform load operations with front loaders due to incorrect selection of operator control and actuation characteristics, which are dependent on the material properties of the load material, leading to inefficient hydraulic power usage.
Innovation Solution
A control unit adapts the functional relationship between the operator control hand lever deflection and hydraulic flow based on detected material properties, such as plunging resistance, to assist operators in efficiently handling different materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple operator control and actuation characteristics are provided for different material properties, then the adaptability of the control system is improved, but the device complexity increases due to the need for selection mechanisms and multiple characteristic profiles
Solution Approach 1:
The control system automatically detects material properties (such as plunging resistance) and autonomously selects the appropriate operator control characteristic without requiring manual intervention from the operator. This self-service approach resolves the contradiction by providing adaptability to different materials while avoiding the complexity of manual selection mechanisms, multiple interface modes, and operator training requirements.
2Productivity
If the operator manually selects the appropriate control characteristic based on material properties, then the productivity is improved through efficient loading operations, but the ease of operation deteriorates due to the need for operator experience and knowledge
Solution Approach 1:
The control system continuously monitors operational parameters such as plunging resistance and automatically adjusts the operator control characteristic based on the detected material properties. This feedback mechanism ensures optimal productivity by matching the control characteristic to the actual material being handled, while simultaneously improving ease of operation by eliminating the need for operators to have specialized knowledge or experience in selecting control modes.
3Power
If the hydraulic flow is increased to handle hard materials with high plunging resistance, then the power capability is improved, but the energy consumption increases during operations with softer materials where less power is needed
Solution Approach 1:
The control system dynamically adjusts the hydraulic flow characteristics based on the detected material properties. When handling hard materials with high plunging resistance, the system increases hydraulic power delivery to meet the higher power demands. Conversely, when handling softer materials, the system automatically reduces hydraulic flow and power consumption to match the lower operational requirements. This dynamic adaptation resolves the contradiction by providing high power capability when needed while minimizing energy consumption during normal operations with softer materials.
Data Source
AI summary
A method for adapting the operator control and actuation characteristic of a front loader control system that has an operator control hand lever, includes evaluating via a control unit a sensor-detected deflection at the operator control hand lever, hydraulically controlling via the control unit an actuating device in accordance with the sensor-detected deflection for raising and lowering a front loader boom having a loading tool for picking up a load material, adapting via the control unit a functional relationship between the sensor-detected deflection at the operator control hand lever and a hydraulic flow generated for the hydraulic control of the actuating device, and adapting via the control unit the functional relationship in accordance with a determined material property variable that represents a plunging resistance that opposes the loading tool when picking up the load material.