Cryogenic Fuel Pump Low-Pressure Storage Volume
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Solution Overview
Problem
Cryogenic fuel delivery devices for internal combustion engines face inefficiencies due to volume and pressure fluctuations in the low-pressure area of high-pressure pumps, leading to oversized pre-feed pumps and reduced efficiency.
Innovation Solution
Incorporating a low-pressure storage volume between the pre-feed and high-pressure pumps, which can be adjusted by a movable or elastically deformable element, to smooth out volume fluctuations and maintain a constant pressure level, allowing the pre-feed pump to be sized for average volume flow, reducing line diameter and installation space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pre-feed pump is oversized to compensate for volume fluctuations of the high-pressure pump, then volume and pressure fluctuations are reduced, but the efficiency of the fuel delivery system deteriorates
Solution Approach 1:
A low-pressure storage volume is introduced as an intermediary component between the pre-feed pump and the high-pressure pump. This storage volume absorbs volume fluctuations from the high-pressure pump without requiring the pre-feed pump to be oversized, thereby maintaining system efficiency while stabilizing pressure and volume delivery.
2Stability of the object's composition
If the pre-feed pump is oversized to compensate for volume fluctuations, then volume fluctuations are reduced, but the device complexity increases
Solution Approach 1:
The low-pressure storage volume serves as a simple intermediary that provides volume fluctuation compensation without requiring complex pump sizing or additional control mechanisms, thus avoiding increased device complexity.
3Volume of stationary object
If a low-pressure storage volume is integrated into the high-pressure pump, then space requirements are reduced, but the manufacturing complexity increases
Solution Approach 1:
The low-pressure storage volume is integrated into the existing high-pressure pump housing structure, merging two functional volumes into a single housing component. This approach reduces overall space requirements while avoiding the need for separate external storage tanks or additional housing components.
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 reduces the load on the high-pressure pump and connected lines, enhances efficiency by compensating for volume fluctuations, and maintains a constant pressure level, thereby improving the overall performance and reducing the need for oversized components.
Implementation Method 1
a storage effect can be achieved through the compressibility of the cryogenic fuel
Implementation Method 2
The low-pressure storage volume can thus be changed by movement and/or elastic deformation of the element
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a fuel supply device for cryogenic fuels, said device comprising a pre-supply pump (1) and a high-pressure pump (2), wherein the high-pressure pump (2) has a reciprocally movable piston (3) which delimits a compression chamber (4). According to the invention, the compression chamber (4) can be connected via a suction valve (5) to a low-pressure accumulator volume (6) which can be filled with cryogenic fuel via the pre-supply pump (1). The invention also relates to a method for operating a fuel supply device for cryogenic fuels.