Electromagnetic Fuel Valve for Low-Pressure Mixture Control
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Solution Overview
Problem
Existing fuel systems with high-pressure fuel injectors are complex and costly, making them unsuitable for a wide range of engine applications, particularly in light-duty combustion engines where simpler and more affordable solutions are needed.
Innovation Solution
A fuel supply device with a main body, fuel chamber, fuel supply pipe, and fuel valve, featuring an electromechanical fuel valve with a wire coil and armature, and a vent valve system controlled by a controller, which manages fuel and air mixture flow efficiently at lower pressures, reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-pressure fuel injectors are used, then fuel delivery precision is improved, but device complexity and cost increase
Solution Approach 1:
The fuel delivery function is segmented into two parts: a coarse delivery mechanism (carburetor body with float chamber) and a fine control mechanism (electromagnetic fuel valve). This segmentation allows the system to achieve precise fuel delivery control without requiring the entire system to operate at high pressure, thereby reducing overall system complexity while maintaining measurement precision.
Solution Approach 2:
The electromagnetic fuel valve acts as an intermediary component between the low-pressure fuel source and the engine. This intermediary device provides precise metering control of fuel flow without requiring the upstream fuel system to generate high pressure, thus achieving precision control while keeping the main fuel delivery system simple and low-cost.
2Measurement precision
If high-pressure fuel pumps and multiple sensors are used, then fuel control accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts the high-cost components (high-pressure pump, multiple sensors) from the system and replaces them with a simpler alternative. The electromagnetic fuel valve alone provides sufficient control accuracy without requiring expensive high-pressure generation equipment or multiple sensing devices, thereby improving ease of manufacture while maintaining fuel control accuracy.
Solution Approach 2:
The system uses a relatively simple electromagnetic fuel valve instead of expensive high-pressure fuel injection components. This approach prioritizes cost-effectiveness by using more economical components that can achieve the required functional performance, making the system more manufacturable and affordable.
3Reliability
If multiple valves and complex control systems are used, then fuel vapor management is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated components. The fuel valve assembly integrates fuel metering, vapor venting, and pressure regulation functions into a single coordinated system. The float chamber assembly similarly combines fuel storage, level sensing, and vapor management functions, reducing the number of separate components while improving overall vapor management reliability.
Solution Approach 2:
The electromagnetic fuel valve and float chamber assembly are designed to perform multiple functions simultaneously: fuel metering, vapor venting, pressure regulation, and level control. This multi-functionality reduces the need for separate dedicated components for each function, thereby simplifying the overall device structure while maintaining reliable vapor management.
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 solution provides a cost-effective and simplified fuel delivery system capable of supplying a fuel and air mixture to engines, improving fuel flow control and reducing system complexity, making it suitable for various engine applications.
Implementation Method 1
The fuel valve includes a wire coil and an armature, and the valve element is carried by the armature for movement relative to the valve seat
Data Source
AI summary
A fuel supply device includes a main body, fuel chamber, fuel supply pipe and a fuel valve. The main body has a main bore with an inlet for air and an outlet through which a fuel and air mixture flows. The fuel chamber retains a supply of fuel. The fuel supply pipe has a passage communicating with the main bore and through which fuel from the fuel chamber flows to the main bore. And the fuel valve has a valve seat, a valve element movable relative to the valve seat between an open position and a closed position, an inlet upstream of the valve seat and is in communication with the fuel chamber, and an outlet downstream of the valve seat. The outlet is coaxially aligned with the passage of the fuel supply pipe and the fuel valve is electrically operated to move the valve element.