Fuel Pump Module Integrated Support Structure
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Solution Overview
Problem
Conventional fuel pump modules with multiple pumps of different discharge pressures require large subtanks and cover members, increasing the module's size due to the need for separate filters and housing for each pump.
Innovation Solution
A fuel pump module design that integrates a support part on one housing member to support both pumps, reducing the number of components and module size by combining the support functions for both pumps and filters, while maintaining efficient fuel supply to the engine's combustion chamber and air-intake system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate housing members are used for each pump, then each pump can be independently supported and maintained, but the number of components increases and the module size increases
Solution Approach 1:
The patent combines multiple housing members into a single integrated housing structure that accommodates both the first and second pumps. The housing includes a pump chamber with a first support portion for the first pump and a second support portion for the second pump, eliminating the need for separate housing members and reducing component count while maintaining structural support functionality.
Solution Approach 2:
The single housing member serves multiple functions: it houses both pumps, provides support portions for each pump, contains the filters, and manages fuel flow paths. This multi-functional design reduces the number of components needed while maintaining the necessary support and containment capabilities.
2Reliability
If separate housing members are used for each pump, then each pump has dedicated support structure, but the module size increases
Solution Approach 1:
The patent implements a nested arrangement where both pumps are housed within a single pump chamber. The first pump and second pump are positioned in the same chamber with各自 support portions, allowing compact integration. The filters are also housed within the same housing structure, creating a nested configuration that reduces overall module volume.
Solution Approach 2:
By merging the housing members into a single integrated structure, the patent reduces the total volume required for housing both pumps. The combined housing eliminates gaps and redundant structures that would exist with separate housing members, achieving compact integration while maintaining dedicated support portions for each pump.
3Ease of manufacture
If multiple separate housing members are used, then each pump and filter can be independently housed, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple housing members into a single integrated housing that can be manufactured as one piece or pre-assembled unit. This reduces the number of components from multiple separate housings to a single housing structure with integrated support portions, simplifying the bill of materials and potential manufacturing processes while maintaining the ability to independently house and service each pump.
Data Source
AI summary
A fuel pump module supports a port injection (PI) fuel pump and a direct injection (DI) fuel pump by utilizing a combination structure of a pump case for housing the PI fuel pump and an other pump case for housing the DI pump case. The two pump cases are combined via a support part. The support part includes an outer wall of a cylinder part of the pump case which extends outwardly toward a radially-outer portion thereof. The cylinder part houses the PI fuel pump. The support part has a C-shape, and supports the other pump case which houses the DI fuel pump, a DI filter and the like. As a result, the fuel pump module has a fewer number of parts and a reduced volume.