Carburetor Vent Piping for Fuel Leak-Free Engine Storage
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Solution Overview
Problem
Existing engines prone to fuel leakage and carburetor damage when changing from a use state to a stowed state due to the carburetor's vent being susceptible to fuel overflow during orientation change.
Innovation Solution
A pipeline connecting the carburetor vent to the fuel tank maintains atmospheric pressure balance in the use state and directs overflow fuel back to the tank in the stowed state, preventing leakage and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the engine is stored in a vertical orientation to reduce storage space, then the horizontal projection area is reduced, but fuel leakage occurs from the carburetor fuel bowl
Solution Approach 1:
The vent position is inverted from the conventional top location to the bottom of the fuel bowl. This inversion allows the vent to remain above the fuel level even when the engine is stored vertically, preventing fuel from flowing into the vent and causing leakage while maintaining proper ventilation function
Solution Approach 2:
The solution addresses the orientation problem by considering the vertical dimension and fuel level relationship. By positioning the vent at the bottom of the fuel bowl, the system ensures that regardless of engine orientation (horizontal or vertical), the vent remains in a position above the fuel level, effectively solving the fuel leakage issue during storage
2Reliability
If the vent is positioned to prevent fuel leakage during vertical storage, then fuel leakage is prevented, but prolonged fuel storage in the carburetor bowl causes impurities and clogging
Solution Approach 1:
The pipeline is pre-configured to automatically drain fuel from the fuel bowl back to the fuel tank when the engine is in storage orientation. This preliminary arrangement ensures that before prolonged storage begins, the fuel drainage path is already in place, preventing impurity formation and clogging by removing fuel from the carburetor bowl
Solution Approach 2:
The pipeline acts as an intermediary mechanism between the fuel bowl and fuel tank. It provides a controlled path for fuel to return to the main tank, preventing fuel from stagnating in the carburetor bowl and causing harmful effects like impurity formation and jet clogging, while not interfering with the vent's fuel leakage prevention 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
Prevents fuel leakage and carburetor damage by ensuring fuel is drained back into the tank, maintaining carburetor reliability and functionality.
Implementation Method 1
When the engine is in a stowed state, the fuel in the fuel bowl of the carburetor will be received by the pipeline when it overflows through the vent
Implementation Method 2
The carburetor has a vent for balancing the pressure in the fuel bowl. The vent is in communication with the external atmosphere to keep the pressure in the fuel bowl balanced
Data Source
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AI summary
An engine (2) comprises a carburetor (22) and a fuel tank (24). The carburetor (22) has a fuel bowl (221) for storing a certain volume of fuel. The carburetor (22) further has a vent (222) allowing the fuel bowl to communicate with atmosphere when the engine (2) is in a use state. A pipeline (23) communicating with the atmosphere and the fuel tank (24) is hemetically connected to the vent (222). The engine (2) is different from the prior art and solves the problem in the prior art in which the carburetor is prone to fuel leakage when the engine is in a stowed state.