Wheel Loader Control for Slip and Implement Stall During Excavation
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Solution Overview
Problem
Wheel loaders experience significant fuel inefficiency during excavation tasks due to prolonged ineffective operations, which can be attributed to slip-during-excavation and work implement stall.
Innovation Solution
A work machine equipped with a controller that monitors operation command values and sensor data to detect slip-during-excavation and work implement stall, and outputs signals to alert the operator and adjust operations to minimize these ineffective states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a work machine is equipped with both a work implement and a cargo body, then the work machine can perform multiple functions (work operations and cargo transportation), but the device complexity increases and requires multiple separate implements
Solution Approach 1:
The patent combines the work implement and cargo body into a single integrated assembly where the work implement is mounted on the cargo body. This merging eliminates the need for separate implements, reducing device complexity while maintaining multi-functionality. The integrated design allows the work machine to perform both work operations and cargo transportation with one combined structure.
Solution Approach 2:
The cargo body is designed to serve dual purposes: it functions as a cargo transportation container and simultaneously serves as a mounting structure for the work implement. This universal design enables the same component (cargo body) to fulfill multiple functions, thereby reducing the overall number of implements needed while enhancing adaptability.
2Device complexity
If the work implement is mounted on the cargo body, then the integrated structure improves space utilization and reduces the number of components, but the work implement may interfere with the cargo body during operation
Solution Approach 1:
The work implement is designed with movable or adjustable components that can dynamically change position or configuration during operation. This dynamic design allows the work implement to move away from or adjust its position relative to the cargo body, preventing interference while maintaining the integrated mounting structure. The dynamic adjustment ensures smooth operation without harmful interactions between components.
3Productivity
If the work machine performs both work operations and cargo transportation, then productivity increases, but the reliability decreases due to higher complexity and more components
Solution Approach 1:
By merging the work implement and cargo body into a single integrated assembly, the patent reduces the total number of components and connection points. This consolidation simplifies the overall system, reducing potential failure points while maintaining the ability to perform both work operations and cargo transportation, thereby improving reliability without sacrificing productivity.
Data Source
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AI summary
A time period for which an ineffective operation is performed during an excavation work is reduced. A work machine includes a vehicular body, a running wheel rotatably attached to the vehicular body, a work implement operable with respect to the vehicular body, an operation apparatus for operating the running wheel and the work implement, and a controller that controls an operation by the work machine. The controller determines that slip-during-excavation which refers to slip of the running wheel with respect to the ground is occurring during the excavation work based on an operation command value output from the operation apparatus and outputs a signal relating to working of the work implement.