Fuel Booster Pump Air-Fuel Mixture Channel Integration
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Solution Overview
Problem
Existing engine fuel supply apparatuses face challenges in maintaining a compact size while ensuring a fast response to throttle valve operations for rapid engine acceleration, due to the complexity and length of air introduction channels required to actuate fuel booster pumps, leading to delayed fuel supply and inadequate engine acceleration.
Innovation Solution
The engine fuel supply apparatus incorporates a fuel booster pump with a negative-pressure chamber channel that introduces a portion of the air-fuel mixture from the air-fuel mixture supply channel into the negative-pressure chamber, eliminating the need for an air channel and allowing the device to be smaller in size, with the negative-pressure chamber channel positioned close to the air-fuel mixture supply channel to simplify the shape and reduce overall length, ensuring timely and rapid fuel supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air channel is provided to the upper half of the insulator and a fuel booster pump is provided to the lower half, then the fuel booster pump can be actuated, but the device size increases and the air introduction channel becomes complex and longer
Solution Approach 1:
The patent merges the air channel and air-fuel mixture supply channel by having the air introduction channel branch directly from the air-fuel mixture supply channel within the insulator. This eliminates the need for a separate air channel to the upper half of the insulator, thereby reducing device size while maintaining fuel booster pump actuation functionality.
Solution Approach 2:
The patent extracts the air channel function from the traditional separate path and integrates it into the air-fuel mixture supply channel. By taking out the redundant air channel portion and using the existing air-fuel mixture supply channel for air introduction, the overall device size is reduced while preserving the necessary pump actuation capability.
2Reliability
If an air introduction channel bypasses the air-fuel mixture supply channel, then the fuel booster pump can be actuated, but the channel shape becomes complex and overall length increases
Solution Approach 1:
The patent combines the air introduction channel with the air-fuel mixture supply channel by creating a branching configuration where the air introduction channel branches directly from the air-fuel mixture supply channel. This eliminates the need for a bypass configuration, simplifying the channel shape and reducing overall complexity while maintaining pump actuation reliability.
3Reliability
If the air introduction channel is long and complex, then the fuel booster pump can be actuated, but the response time to throttle valve operation increases
Solution Approach 1:
The patent extracts the redundant portion of the air introduction path by having the air introduction channel branch directly from the air-fuel mixture supply channel near the fuel booster pump. This eliminates the long bypass path through the upper half of the insulator, significantly reducing the channel length and improving response time to throttle valve operation.
Solution Approach 2:
The patent positions the air introduction channel to branch directly from the air-fuel mixture supply channel close to the fuel booster pump, ensuring that air is introduced to the pump chamber as early as possible in the flow path. This preliminary positioning of the air introduction point reduces the distance air must travel and improves the speed of pump actuation in response to throttle valve operation.
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 configuration enables a fast and efficient increase in fuel content in the air-fuel mixture during rapid engine acceleration, preventing inadequate acceleration or stopping of the engine by actuating the fuel booster pump using the air-fuel mixture, while maintaining a compact design and reducing variations in the air-fuel ratio.
Implementation Method 1
The negative-pressure diaphragm of the fuel booster pump is thereby moved toward the negative-pressure chamber by the elastic force of a spring member.
Implementation Method 2
Air in the pump chamber is forced out to a pressure chamber via a communicating channel. The pressure diaphragm is pushed out toward the fuel chamber, and the fuel in the fuel chamber is supplied to the air-fuel mixture supply channel
Data Source
AI summary
Disclosed is an engine fuel supply apparatus which can be made smaller in size and in which the amount of fuel in an air-fuel mixture can be increased with a fast response in correspondence with the operation of a throttle valve when the engine is accelerated rapidly. The fuel supply apparatus is provided with a fuel booster pump. A portion of an air-fuel mixture is introduced into a negative-pressure chamber of the fuel booster pump via a negative-pressure chamber channel, and the fuel booster pump is actuated. The actuation forces air in a pump chamber to flow into a pressure chamber, and fuel in a fuel storage chamber is temporarily supplied to a carburetor.