Work Vehicle Display Device Flow Rate Correlation
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Solution Overview
Problem
Conventional backhoes and work vehicles face difficulties in correlating the maximum flow rate level displayed on the instrument panel with the corresponding operating member, making it challenging to smoothly operate the attachment tools.
Innovation Solution
A display device for work vehicles that includes a flow rate limit setting unit and a display unit, where operating member symbols are displayed along with the maximum flow rate levels, allowing clear correlation and independent setting for each operating member, and featuring separate display sections for forward and backward flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a display unit shows maximum flow rate levels without operating member symbols, then the display unit structure is simple, but it becomes difficult to correlate the displayed flow rate level with the corresponding operating member
Solution Approach 1:
The patent uses operating member symbols (visual copies) to represent the actual operating members on the display unit. These symbols replicate the appearance and arrangement of the physical operating members, enabling operators to easily correlate displayed flow rate levels with the corresponding operating members without adding complex identification systems.
Solution Approach 2:
The patent adds a visual dimension to the display by incorporating operating member symbols alongside flow rate level indicators. This transforms the display from a simple numerical representation to a multi-dimensional visual interface that includes both the operating member identity (through symbols) and the flow rate information, resolving the correlation problem.
2Measurement precision
If maximum flow rate levels are independently set for each operating member, then the control precision is improved, but the setting operation becomes more complex
Solution Approach 1:
The patent segments the flow rate control system into individual controllable units, each associated with a specific operating member symbol. This allows independent setting of maximum flow rate levels for each operating member while maintaining clear visual association through the symbols, making the complex setting process more manageable and intuitive.
Solution Approach 2:
The display unit provides visual feedback by showing the set maximum flow rate levels alongside the operating member symbols. This feedback mechanism allows operators to verify their settings and understand the current configuration, reducing the complexity of the setting operation through intuitive visual confirmation.
3Loss of information
If separate display sections for forward and backward flow rates are provided, then the information clarity is improved, but the display unit complexity increases
Solution Approach 1:
The patent applies local quality by providing separate display sections specifically for forward and backward flow rates within the overall display unit. Each section is optimized to display directional flow rate information clearly, while the use of operating member symbols maintains consistency and reduces overall complexity by providing a unified visual language.
Data Source
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AI summary
A display device for a work vehicle having an attachment apparatus (A) operated by an actuator (31, 32), the device comprising: a flow rate limit setting unit (41) for variably setting a maximum flow rate level (ML) of hydraulic oil supplied to and drained from the actuator (31, 32) by operating an operating member (25, 27); and a display unit (45) for displaying the maximum flow rate level (ML) of the hydraulic oil supplied to and drained from the actuator (31, 32); the device characterized in that: the hydraulic oil whose flow rate corresponds to a manipulated variable of the operating member (25, 27) is supplied to and drained from the actuator (31, 32) within a range defined by the maximum flow rate level (ML) that is set by the flow rate limit setting unit (41) to cause the attachment apparatus (A) to operate; and an operating member symbol (D25) for indicating the operating member (25, 27) is displayed in the display unit (45), with the maximum flow rate level (ML) of the hydraulic oil supplied to and drained from the actuator (31, 32) by operating the operating member (25, 27) being displayed in accordance with the operating member symbol (D25).