Fuel Delivery Damper for Pressure Pulsation Control
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Solution Overview
Problem
Fuel delivery systems experience fuel pressure variations or pulsations due to fuel pumps or injectors, leading to improper fuel delivery and disrupted air/fuel ratios, which negatively impact gas mileage and accuracy.
Innovation Solution
A fuel delivery system incorporating a damper mechanism along the fuel path, featuring flexible members and airtight chambers, that absorb pressure pulses by deflecting and increasing the fuel rail's volume, thereby maintaining constant fuel pressure and reducing pulsations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a damper with flexible members is added to the fuel delivery system, then fuel pressure pulsations are reduced and fuel delivery accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs flexible members including a diaphragm and bellows that expand and contract to absorb fuel pressure pulsations. These flexible components act as shock absorbers, maintaining constant fuel pressure without requiring complex electronic control systems or multiple rigid pressure regulation components.
Solution Approach 2:
The damper utilizes the compressibility of trapped air in a chamber behind the flexible members to dampen pressure variations. When fuel pressure increases, the flexible members deflect into the air chamber, compressing the air and absorbing the pressure surge, thereby smoothing fuel delivery.
2Stability of the object's composition
If the flexible member deflects to absorb pressure pulses, then fuel pressure is stabilized, but the volume of the fuel rail increases
Solution Approach 1:
The flexible members deflect in a direction perpendicular to the fuel flow path, utilizing the vertical or lateral dimension to absorb pressure variations. This allows pressure stabilization without requiring additional horizontal space or increasing the overall fuel rail volume significantly.
Solution Approach 2:
The flexible members dynamically adjust their position based on instantaneous pressure conditions, expanding when pressure rises and contracting when pressure falls. This dynamic response allows effective pressure stabilization within a compact, fixed-volume housing.
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 damper system effectively dampens fuel pressure pulsations, ensuring accurate fuel delivery to injectors, improving gas mileage and maintaining consistent fuel pressure, thus enhancing the reliability and efficiency of the fuel delivery process.
Implementation Method 1
The flexible member is in contact with fuel passing through the fuel rail... The flexible member deflects and increasing the fuel rail's volume
Data Source
AI summary
A fuel delivery system including a fuel line and a damper. The fuel line extends to a fuel injector and defines a fuel path. The damper is along the fuel path and includes a flexible member and a stop. A first side of the flexible member faces the fuel path and a second side of the flexible member faces the stop.