Work Vehicle Control Valve for Uni-Bi Directional Attachment Adaptation
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Solution Overview
Problem
Work vehicles face challenges in efficiently operating both uni-directional and bi-directional attachments due to the need for multiple hoses, which increase costs and risk damage to bi-directional attachments when incorrectly configured for uni-directional mode.
Innovation Solution
A fluid circuit with an operator-enabled mode selection switch and a first control valve that can be actuated to either bi-directional or uni-directional positions, ensuring appropriate fluid flow and preventing damage by controlling electrical power to the system based on the selected mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If four hoses/tubes are run through the boom to accommodate both uni-directional and bi-directional attachments, then the work vehicle can operate both attachment types, but the cost increases and the opportunity for hose damage increases
Solution Approach 1:
The control valve is designed with multiple positions (first bi-directional position, first uni-directional position, second bi-directional position) that can accommodate both uni-directional and bi-directional attachments through the same fluid circuit, eliminating the need for separate hose configurations for different attachment types
2Adaptability or versatility
If four hoses/tubes are run through the boom to accommodate both attachment types, then the work vehicle can operate both attachment types, but the opportunity for hose damage during normal use increases
Solution Approach 1:
The control valve serves as a universal interface that can configure the fluid circuit for either uni-directional or bi-directional operation, reducing the number of hoses required and thereby reducing the risk of hose damage during normal use
3Ease of operation
If the work vehicle is configured to operate in uni-directional mode without protection, then operation is simpler, but damage to bi-directional attachment may occur if incorrectly configured
Solution Approach 1:
The control valve provides feedback through its mechanical configuration and positioning to ensure that the fluid circuit is properly configured for the attached attachment type, preventing inadvertent damage by ensuring correct setup before operation
Solution Approach 2:
The control valve is configured to establish the correct fluid circuit configuration before the attachment operates, ensuring that the circuit is properly set up for either uni-directional or bi-directional operation prior to attachment activation
Data Source
AI summary
A work machine includes a fluid circuit for use with an attachment configured to operate using one of a uni-directional flow and a bi-directional flow through the attachment. An operator-enabled mode selection switch operably connects to a controller. An electrical circuit includes the operator-enabled mode selection switch and a second operator-enabled switch. A first control valve is in fluid communication with the attachment. In response to the mode selection switch being operator-actuated to a bi-directional mode setting, the first control valve via the controller is actuatable to one of the bi-directional positions, electrical power being unavailable to the second operator-enabled switch of the electrical circuit. In response to the mode selection switch being operator-actuated to a uni-directional mode setting, the first control valve via the controller secures the first control valve in the uni-directional position, and electrical power is provided to the second operator-enabled switch of the electrical circuit.