Aerator Low Fuel Level Control System
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Solution Overview
Problem
Aerators for maintaining landscaped turf surfaces face issues with high cost and complexity due to the need for electro/hydraulic lift pumps to retrieve stuck tines when fuel runs out, and existing manual methods are laborious and risk turf damage.
Innovation Solution
Incorporating a low fuel level sensor and controller that automatically raises the coring head and prevents its lowering when fuel is low, accompanied by warning signals to prevent damage and simplify operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electro/hydraulic lift pump is added to raise the coring head when fuel runs out, then the ability to retrieve stuck tines is improved, but the cost and complexity of the aerator increases
Solution Approach 1:
The system uses the existing engine-driven hydraulic system to automatically raise the coring head when fuel is low, eliminating the need for a separate electro/hydraulic lift pump. The aerator serves itself by utilizing its own hydraulic resources to prevent the harmful condition of stuck tines.
Solution Approach 2:
The system detects low fuel levels before the engine stops completely and automatically raises the coring head in advance, preventing the tines from becoming stuck in the ground. This preliminary action avoids the need for complex retrieval mechanisms.
2Device complexity
If manual methods are used to remove and disconnect tine holders when fuel runs out, then the need for additional mechanisms is reduced, but the operation becomes laborious and slow, and turf damage risk increases
Solution Approach 1:
The hydraulic system automatically performs the function of raising the coring head without operator intervention, eliminating the laborious manual process of removing and reconnecting tine holders. The system serves itself by automatically responding to low fuel conditions.
Solution Approach 2:
The manual mechanical process of removing and reconnecting tine holders is replaced by an automated hydraulic lifting mechanism, significantly reducing operator labor and time while minimizing turf damage risk.
3Device complexity
If the aerator runs out of fuel without monitoring, then fuel monitoring complexity is reduced, but the coring head becomes stuck in the down position with tines in the ground
Solution Approach 1:
The low fuel level sensor provides feedback to the controller, which automatically activates the hydraulic lift to raise the coring head when fuel is low. This feedback loop ensures reliable prevention of stuck tines without requiring complex monitoring systems.
Solution Approach 2:
The system automatically detects and responds to low fuel conditions by raising the coring head, serving itself to prevent the harmful condition without requiring operator intervention or complex monitoring infrastructure.
Data Source
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AI summary
An aerator (100) with low fuel level control includes a low fuel level sensor (126), and a controller (120) electrically connected to the low fuel level sensor and to the coring head (114) that provides a warning to the operator and raises the coring head and/or prevents lowering the coring head into the operating position after the low fuel level sensor indicates a low fuel level in the fuel tank.