Hydraulic Bi-Directional Flow Switch Piston Detection
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Solution Overview
Problem
Existing automated steering systems for working machines, such as tractors and combines, require costly and complex sensors to detect user input on the steering wheel, especially under high pressure conditions, which increases system complexity and cost.
Innovation Solution
A bi-directional flow switch using a piston in a fluid channel with a magnetic sensor to detect movement of the piston away from its default position, allowing for reliable and cost-effective detection of user input, capable of withstanding high pressure hydraulic fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If flow meters or external detection sensors are used to detect steering wheel movement, then user input detection is achieved, but system cost and complexity increase
Solution Approach 1:
The patent extracts the detection function from complex external sensors and flow meters, and integrates it directly into the hydraulic steering system's existing piston mechanism. The piston's natural movement in response to hydraulic fluid flow is utilized as the detection signal, eliminating the need for separate detection components and reducing overall system complexity while maintaining detection accuracy
Solution Approach 2:
The piston serves multiple functions: it controls hydraulic fluid flow during steering operation and simultaneously acts as a detection element for user input. By making the piston multi-functional, the patent eliminates the need for separate detection sensors, thereby reducing system complexity and cost while maintaining the ability to detect steering wheel movement accurately
2Measurement precision
If flow meters are used to detect hydraulic fluid movement, then steering input detection is achieved, but system cost increases
Solution Approach 1:
The hydraulic steering system's own piston and hydraulic fluid flow serve the dual purpose of both steering control and input detection. The system uses its existing operational parameters (piston position and hydraulic flow) for detection purposes, eliminating the need for additional expensive detection components and reducing overall system cost
Solution Approach 2:
The patent merges the detection function with the existing hydraulic steering mechanism. The piston that naturally moves in response to steering input is combined with a magnetic sensor to create an integrated detection system, eliminating the need for separate flow meters or external sensors and thereby reducing system cost
3Measurement precision
If external detection sensors are used, then user input can be detected, but additional electronics and software complexity are required
Solution Approach 1:
The patent replaces complex electronic detection systems with a simplified magnetic sensing mechanism. The piston's mechanical movement directly actuates a magnetic sensor, providing a straightforward electromechanical detection method that eliminates the need for complex software algorithms and multiple electronic components required by external sensors
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
Enables reliable and cost-effective detection of user input on the steering wheel, reducing system complexity and cost by utilizing hydraulic fluid flow to disengage automated steering, effective in high-pressure conditions.
Implementation Method 1
the piston is to displace from the default position when the hydraulic steering fluid flows along the fluid pathway
Implementation Method 2
A bi-directional flow switch using a piston in a fluid channel with a magnetic sensor to detect movement of the piston
Data Source
AI summary
Hydraulic bi-directional flow switches are disclosed. A disclosed example apparatus includes a piston disposed in a fluid channel between a first fluid connection and a second fluid connection, where the first and second fluid connections define a fluid pathway for hydraulic steering fluid. The example apparatus also includes a detector to detect a movement of the piston away from a default position of the piston, where the piston is to displace from the default position when the hydraulic steering fluid flows along the fluid pathway.