Outboard Motor Tilt Control with Obstacle Detection
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Solution Overview
Problem
Conventional outboard motor tilt movement systems fail to safely tilt up the outboard motor beyond a predetermined angle, even when no obstacles are present, and cannot restart tilt-up movement after interruption, leading to potential collisions with obstacles and limited operational flexibility.
Innovation Solution
An outboard motor tilt movement interruption device with an ON/OFF switch that cuts off or reconnects the circuit to the tilt device based on the presence of obstacles, allowing the outboard motor to stop or restart tilt-up movement, ensuring safe operation and maximizing tilt angle usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional control device stops tilt-up when the tilt angle exceeds a predetermined angle (stop angle A−allowance angle α), then the outboard motor is prevented from colliding with obstacles, but the outboard motor cannot restart tilt-up movement after interruption and cannot tilt up to angles exceeding the stop angle even when no obstacles are present
Solution Approach 1:
The patent applies dynamics by making the tilt-up control system adaptive rather than static. The control device dynamically adjusts the tilt-up stop condition based on real-time obstacle detection. When no obstacle is detected, the system allows tilt-up beyond the conventional stop angle; when an obstacle is detected, it prevents collision by stopping tilt-up. This dynamic adaptation resolves the contradiction between collision prevention and tilt angle flexibility.
Solution Approach 2:
The patent changes the control parameter from a fixed stop angle to a variable stop condition based on obstacle presence. The control device monitors the tilt-up movement range and compares the actual position with the stored stop angle A. When the motor is within the tilt-up movement range and an obstacle is detected, the tilt-up stop condition is established; otherwise, it is canceled. This parameter change enables the system to achieve both collision prevention and full tilt angle flexibility.
2Reliability
If the tilt-up stop condition is established to prevent collision with obstacles, then safety is improved, but the circuit remains cut off and prevents restart of tilt-up movement even after obstacles are cleared
Solution Approach 1:
The patent implements feedback by continuously monitoring the tilt-up movement range and obstacle presence, then adjusting the tilt-up stop condition accordingly. The control device establishes the tilt-up stop condition when an obstacle is detected within the movement range and cancels it when the obstacle is cleared or the motor moves outside the range. This feedback mechanism ensures both safety during obstacle presence and operational continuity when obstacles are absent, resolving the contradiction between safety and ease of operation.
Solution Approach 2:
The patent applies periodic action through continuous monitoring and periodic re-evaluation of the tilt-up stop condition. The control device periodically checks whether the outboard motor is within the tilt-up movement range and whether obstacles are present, adjusting the circuit connection state accordingly. This periodic verification ensures the system maintains safety when needed while automatically enabling operation when safe, resolving the contradiction between safety and operational continuity.
Data Source
AI summary
In an outboard motor tilt movement interruption device, when a tilt-up stop condition is established by a presence of an obstacle in a tilt-up movement range of an outboard motor and the obstacle and the outboard motor are equal to or less than a predetermined distance from each other, a circuit arranged to actuate a tilt device is cut off by an ON/OFF switch. On the other hand, when the tilt-up stop condition is not established, the circuit is connected. When the tilt-up stop condition is established during an operation of the ON/OFF switch, the circuit is cut off, and tilt-up of the outboard motor is stopped. Thereafter, when the tilt-up stop condition becomes canceled, the circuit is connected and tilt-up of the outboard motor is restarted.