Dual Fuel Supply System for Combustion Engine
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Solution Overview
Problem
Calibration of carburetors in combustion engines is time-consuming and labor-intensive, and initial calibration becomes less effective over time due to changing engine operating conditions, particularly when starting a cold engine or during acceleration.
Innovation Solution
A dual fuel supply system for combustion engines, comprising a carburetor and an additional fuel supply device with an electrically actuated valve, controlled by a controller that adjusts fuel delivery based on temperature and engine speed, supplemented by a check valve to prevent reverse fluid flow and ensure efficient fuel distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a carburetor with choke valve is used to facilitate starting and acceleration, then engine operation under certain conditions is improved, but calibration becomes time-consuming and labor-intensive
Solution Approach 1:
The fuel supply system is divided into two separate devices: a carburetor for normal operation and a second fuel supply device for supplemental fuel delivery during specific conditions. This segmentation allows each device to be optimized for its specific function, with the second device providing automated fuel supplementation without requiring manual calibration adjustments to the carburetor.
Solution Approach 2:
The second fuel supply device is equipped with an electrically actuated valve that automatically regulates fuel flow based on engine operating conditions. The system self-adjusts fuel delivery without requiring manual calibration, eliminating the time-consuming calibration process while maintaining reliable engine operation during starting and acceleration.
2Manufacturing precision
If initial calibration is performed to control fuel and air delivery, then fuel-air mixture is optimized for initial conditions, but calibration becomes less effective over time as engine conditions change
Solution Approach 1:
The fuel supply system transitions from a static carburetor calibration to a dynamic system where the electrically actuated valve in the second fuel supply device can adjust fuel flow in real-time based on changing engine conditions. This dynamic adjustment capability allows the system to maintain optimal fuel-air mixture ratios even as engine operating conditions evolve over time.
Solution Approach 2:
The system incorporates sensors that monitor engine operating conditions and provide feedback to the control module. Based on this feedback, the control module adjusts the electrically actuated valve to maintain proper fuel-air mixture ratios, enabling the system to adapt to changing conditions rather than relying on fixed initial calibration.
3Reliability
If a second fuel supply device is added to supplement fuel delivery, then fuel supply under certain conditions is improved, but device complexity increases
Solution Approach 1:
The second fuel supply device is integrated with the existing carburetor system, with both devices delivering fuel to the same engine intake. The passages are communicated so that fuel from the carburetor and the second fuel supply device combine and mix before entering the engine, creating a unified fuel delivery system that leverages the strengths of both approaches.
Solution Approach 2:
The second fuel supply device is designed to work in conjunction with the carburetor, serving multiple functions: providing supplemental fuel during starting and acceleration, maintaining proper fuel-air ratios under varying conditions, and integrating with the existing fuel delivery infrastructure. This multi-functionality justifies the added complexity by delivering comprehensive fuel supply management.
4Ease of operation
If an electrically actuated valve is used to selectively provide fuel, then fuel delivery control is improved, but system complexity and cost increase
Solution Approach 1:
The system replaces manual mechanical calibration and adjustment of the carburetor with an electrically actuated valve that is controlled by electronic sensors and a control module. This substitution of mechanical adjustment with electronic control simplifies operation, as the system automatically adjusts fuel delivery based on sensor input without requiring manual intervention or complex mechanical linkages.
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
This system simplifies and automates the calibration process, providing optimal fuel-air mixture under varying engine conditions without the need for a pump, reducing complexity and cost while maintaining efficient engine operation.
Implementation Method 1
The fuel chamber may be located above the valve seat with respect to the force of gravity so that fuel flows under the force of gravity from the fuel chamber outlet, through the fuel passage and to the electrically actuated valve
Implementation Method 2
The speed component may include a wire coil, such as a coil in which energy is induced as a function of engine speed, for example a coil in which energy is induced an engine flywheel rotates
Data Source
AI summary
In at least some implementations, a charge forming system for a combustion engine includes a first fuel supply device having a first passage from which fuel is discharged for delivery to the engine and a second fuel supply device having a second passage from which fuel is discharged for delivery to the engine. The first passage communicates with the second passage so that the fuel in the first passage is combined with the fuel in the second passage.