Fuel Pump Branch Flow Paths for Pulsation Dampening
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Solution Overview
Problem
Fuel pumps with discharge and supply ports experience pressure pulsation, leading to noise and fluctuations in fuel flow rate due to interconnected fuel paths, which complicates piping and affects the stability of fuel delivery to engines.
Innovation Solution
A fuel pump design featuring a fuel chamber and branch fuel paths between the upper body and motor section, where the discharge port is directly connected to the fuel chamber without flowing through the branch path, and the outlet port flows through the branch path, isolating the discharge and outlet ports to suppress pressure pulsation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the discharge port and outlet port are provided on the fuel pump with interconnected fuel paths, then the fuel pump can supply fuel to multiple destinations, but pressure pulsation in one port affects the other port causing noise and flow rate fluctuations
Solution Approach 1:
The fuel pump's internal fuel path is segmented into separate branches: a first branch connecting the fuel chamber to the discharge port, and a second branch connecting the fuel chamber to the outlet port. This segmentation isolates the two ports so that pressure pulsation in one branch does not directly affect the other, while both ports remain functional for supplying fuel to different destinations
2Object-affected harmful factors
If pressure pulsation is suppressed by isolating fuel paths, then noise and flow rate fluctuations are reduced, but the complexity of the fuel pump structure increases
Solution Approach 1:
The first and second branch fuel paths are integrated within the single fuel chamber, allowing both ports to be served from a common fuel source while maintaining separate flow paths. This merging approach reduces overall structural complexity compared to having completely separate pumping mechanisms for each port
Data Source
AI summary
A fuel pump includes a housing, a pump section disposed within the housing on a first side thereof, a motor section disposed within the housing on a second side thereof and communicating with the pump section, and an upper body closing an end of the housing on the second side. A fuel chamber, into which fuel flows from the pump section through the motor section toward the second side of the housing, and a first branch fuel path, which is connected to the fuel chamber, are provided between the upper body and a motor. A discharge port is connected to the fuel chamber. A supply port is connected to the first branch fuel path, and the fuel in the fuel chamber is provided to the supply port through the first branch fuel path.