Fluid Conveying Device with Coupled Pumps for Fuel Supply
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Solution Overview
Problem
Existing fuel-conveying systems in motor vehicles require overdimensioned pumps to ensure continuous fuel supply, leading to increased energy consumption and inefficient operation of suction jet pumps, which are not regulated by actual fuel requirements.
Innovation Solution
A fluid-conveying device with a first pump and a second pump mechanically coupled, where the second pump's operation is dependent on the fluid stream conveyed by the first pump, allowing for requirement-dependent operation and energy-efficient use of suction jet pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel-conveying pump is overdimensioned to ensure continuous fuel supply to suction jet pumps, then the fuel supply reliability is improved, but the energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the pump operation variable rather than fixed. The second pump's operation dynamically adapts to actual fuel requirements through requirement-dependent activation, allowing the system to maintain reliability while reducing energy consumption during low-demand periods.
Solution Approach 2:
The system implements self-service through the first suction jet pump that is passively supplied by the second pump's output. This creates a self-regulating mechanism where the pump system automatically ensures fuel supply to the swirl pot without requiring continuous overdimensioned operation.
2Reliability
If the suction jet pumps are permanently operated to ensure adequate fuel conveyance, then the fuel conveyance reliability is improved, but the power consumption of the fuel-conveying pump increases
Solution Approach 1:
The patent implements periodic action by operating the second pump only when required rather than continuously. The pump activation is tied to actual fuel needs, creating an on-demand operation pattern that maintains conveyance reliability while reducing overall power consumption.
Solution Approach 2:
The system uses partial action by providing fuel supply to suction jet pumps only to the extent actually needed. The second pump operates partially rather than at full capacity continuously, matching power output to actual demand while ensuring adequate fuel conveyance when required.
3Quantity of substance
If the fuel-conveying pump is overdimensioned to account for suction jet pump operation, then the fuel supply adequacy is improved, but the current consumption increases
Solution Approach 1:
The patent applies parameter changes by varying the operational parameters of the second pump based on actual fuel requirements. The pump's activation state and operating parameters are adjusted dynamically, allowing adequate fuel supply quantity while optimizing current consumption rather than maintaining constant overdimensioned operation.
4Productivity
If the suction jet pumps are permanently operated, then the fuel conveyance from remote regions is improved, but the overall energy efficiency deteriorates
Solution Approach 1:
The system implements feedback through requirement-dependent operation of the second pump. The pump operation responds to actual fuel conveyance needs, creating a feedback mechanism that maintains adequate fuel supply from remote tank regions while minimizing energy waste by operating the pump only when necessary.
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 ensures constant fuel replenishment in the swirl pot, reduces energy consumption by matching pump power to actual fuel needs, and prevents unnecessary fuel conveyance, thereby optimizing fuel efficiency in motor vehicles.
Implementation Method 1
the drive region (5) is able to be driven by a fluid stream conveyed by the first fluid-conveying pump (3)
Implementation Method 2
As a result of the conveyance of the fuel through the suction jet pump, a propulsive jet is formed in the suction jet pump, which jet partially generates a negative pressure and thus entrains fuel from the surroundings of the suction jet pump and conveys this fuel to the conveying point
Data Source
AI summary
A fluid-conveying device for conveying a fluid from a tank includes: a first fluid-conveying pump; a swirl pot; and a second fluid-conveying pump having a drive region and a conveying region coupled to the drive region. The fluid is conveyable from the swirl pot by the first fluid-conveying pump, and the conveying region is configured and arranged so as to be drivable by the drive region.