Outboard Motor Steering Cylinder Air Guide for Automatic Bleeding
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Solution Overview
Problem
Existing outboard motors face instability due to air accumulation in the oil chamber of the steering cylinder, requiring complex manual operations to bleed air, which complicates the steering mechanism.
Innovation Solution
Incorporation of an air guide adjacent to the oil passage connection port that automatically guides air out of the oil chamber during hydraulic oil discharge, utilizing a disk-shaped structure with outer and inner peripheral side flow passages that adjust based on the direction of hydraulic oil flow, eliminating the need for manual air bleeding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the connection port is provided on the lateral side of the steering cylinder, then the steering mechanism is compact, but air accumulates in the oil chamber and cannot escape, causing unstable operation
Solution Approach 1:
An air guide structure is introduced as an intermediary component between the oil chamber and the lateral connection port. This air guide includes a guide passage that directs air toward the connection port, enabling air to escape through the existing lateral port without requiring the port to be repositioned to the upper side, thus maintaining system compactness while improving air discharge functionality
Solution Approach 2:
The air guide structure utilizes the existing hydraulic oil flow through the connection port to achieve dual functionality: hydraulic oil enters/exits through the connection port while simultaneously the air guide directs air to escape through the same port. The system serves itself by using the normal hydraulic operation to facilitate air discharge without requiring separate air bleeding operations or structural modifications
2Reliability
If manual air bleeding operations are implemented, then air can be discharged from the oil chamber, but the operation becomes complex requiring tilting and disassembly of the steering cylinder
Solution Approach 1:
The air guide structure enables the system to automatically discharge air during normal steering operations. The guide passage directs air toward the connection port where hydraulic oil flows, allowing air to escape passively without requiring manual intervention, tilting, or disassembly of the steering cylinder
Solution Approach 2:
The air guide structure is pre-installed in the steering cylinder, with the guide passage positioned to direct air toward the connection port before any operating issue occurs. This preliminary configuration ensures that air can be discharged automatically during normal operation without requiring subsequent manual bleeding operations
3Ease of operation
If the air guide directs air to the connection port during hydraulic oil discharge, then air bleeding becomes automatic, but the structure becomes more complex
Solution Approach 1:
The air guide structure is designed to work with the existing lateral connection port, allowing the same port to serve dual purposes: hydraulic oil supply/discharge and air escape. The guide passage integrates with the existing port location, making the added structure relatively simple while achieving automatic air bleeding functionality
Solution Approach 2:
The air guide acts as a relatively simple intermediary component that directs air flow toward the existing connection port. Rather than requiring major structural changes to the steering cylinder, the air guide is a localized addition that uses the existing port location, minimizing overall structural complexity while achieving the desired automatic air discharge function
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
The air guide ensures efficient and automatic air bleeding from the oil chamber during normal steering operations, maintaining steering stability and reducing pressure loss during hydraulic oil supply and discharge.
Implementation Method 1
an air guide, located in a vicinity of or adjacent to the oil passage connection port in the right-left direction, to guide air remaining in the oil chamber to the oil passage connection port when the hydraulic oil is discharged from the oil chamber via the oil passage
Implementation Method 2
an oil passage connected to the oil chamber via an oil passage connection port to supply the hydraulic oil to the oil chamber and discharge the hydraulic oil from the oil chamber
Data Source
AI summary
An outboard motor includes an oil chamber, an oil passage connected to the oil chamber via an oil passage connection port, and an air guide, located in a vicinity of or adjacent to the oil passage connection port in a right-left direction of an outboard motor body, to guide air remaining in the oil chamber to the oil passage connection port when hydraulic oil is discharged from the oil chamber via the oil passage.