Tilted Poppet Valve for Precise Fuel Nozzle Trickle Flow
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Solution Overview
Problem
Current fuel dispensing nozzles lack precision in delivering fuel to a specified monetary amount, making it difficult for customers to stop dispensing at the desired value, especially when prices are high.
Innovation Solution
Integration of a tilted poppet valve with an inclined poppet skirt that allows for controlled and trickle flow by slightly lifting the poppet seal off the nozzle valve seat, enabling precise control of fuel delivery to the penny.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a standard poppet valve is used for fuel dispensing, then the nozzle structure is simple and easy to manufacture, but the fuel delivery precision is insufficient making it difficult to stop at desired monetary amount
Solution Approach 1:
The poppet valve is segmented into multiple functional components: the poppet body, the tilted poppet skirt with inclined surface, the poppet seal, and the holder assembly. This segmentation allows each component to perform a specific function - the inclined surface controls flow initiation while the seal provides closure - thereby improving fuel delivery precision without requiring a completely complex redesign of the entire nozzle system
Solution Approach 2:
The tilted poppet skirt acts as an intermediary element between the poppet stem and the poppet seal. Its inclined surface provides a gradual transition zone that enables controlled opening of the valve, allowing precise flow rate adjustment from zero to full flow. This intermediary structure mediates between the simple stem movement and the required precise flow control
2Ease of operation
If the poppet valve is fully opened for rapid fuel dispensing, then the productivity is high, but the ability to control flow at finite increments is lost
Solution Approach 1:
The poppet skirt is designed with dynamic characteristics - its inclined surface allows the valve opening to progress gradually as the stem moves upward. This creates a dynamic flow control system where the flow rate is not simply on/off but can be continuously adjusted from zero to maximum based on the stem position, enabling both precise control and rapid dispensing when needed
Solution Approach 2:
The inclined surface of the poppet skirt changes the geometric parameters of the valve opening progressively. As the stem rises, the contact point moves along the incline, gradually increasing the opening area and thus the flow rate. This parameter change approach allows continuous flow adjustment while maintaining the ability to achieve full flow rate for high-productivity dispensing
Data Source
AI summary
An integral tilted poppet valve for controlled flow of fuel from a fuel dispensing nozzle, including a poppet skirt, embodied within the poppet valve accessory of this invention, the poppet skirt cooperates with the poppet stem, and the poppet holder and its seal disc, to furnish a sealing of the nozzle, through the poppet valve, when the fuel nozzle is not in use, but that upon actuation of the nozzle lever, elevating its poppet stem, the poppet skirt includes an upper inclined surface for biasing against the poppet holder and its seal disc, to tilt the opening of the nozzle to provide for a minor or trickle flow of fuel through the nozzle to furnish a more precise dispensing of the quantity and value of the fuel being delivered to a vehicle.