Fuel Pump Adapter for Drivetrain-Free Servicing
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Solution Overview
Problem
The servicing of high pressure fuel pumps in internal combustion engines is labor-intensive due to the complex procedures required for proper removal and replacement, which involves disassembling and reassembling the pump within the engine's drivetrain.
Innovation Solution
A fuel pump adapter system that allows for the removal and installation of the fuel pump without disturbing other components of the accessory drivetrain, using a pilot portion and O-rings to secure the drive shaft and gear housing, enabling the pump to be aligned and fastened without dismantling the drivetrain, and allowing for easy reversal of the installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional fuel pump servicing procedures are used, then proper removal and replacement can be achieved, but the process is labor-intensive and time-consuming due to complex disassembly and reassembly requirements
Solution Approach 1:
The fuel pump assembly is divided into separable components: the pump body and the gear housing. The gear housing can be removed independently from the pump body through the drive shaft, allowing the pump to be serviced without complete disassembly of the entire assembly. This segmentation enables faster replacement of the pump body while leaving the gear housing in place.
Solution Approach 2:
The gear housing is extracted from the pump assembly through the drive shaft mechanism. By removing the gear housing separately, the pump body can be accessed and replaced without disturbing other drivetrain components. This extraction principle eliminates the need for complex disassembly procedures.
2Ease of operation
If the fuel pump is removed and replaced without disturbing other drivetrain components, then labor time is reduced, but proper alignment and securing of the pump becomes more difficult
Solution Approach 1:
The drive shaft acts as an intermediary component between the gear housing and the pump body. It provides a standardized interface that ensures proper alignment when the gear housing is reinstalled. The drive shaft's geometry and engagement features guide the gear housing into correct positional alignment, eliminating the need for complex alignment procedures.
3Reliability
If the drive shaft is securely held during rotation, then proper engagement with the gear housing is achieved, but the complexity of the securing mechanism increases
Solution Approach 1:
The drive shaft incorporates self-aligning and self-securing features through its geometric design. The shaft's shape and engagement surfaces automatically guide the gear housing into proper position and maintain secure engagement during rotation. This self-service mechanism eliminates the need for additional complex securing devices or adjustment mechanisms.
Data Source
AI summary
A fuel pump includes a body portion housing a fuel pump assembly configured to receive a rotational input and generate fuel flows, a drive shaft extending into the body portion with a pump gear coupled to the drive shaft, and a pilot portion annularly disposed about the drive shaft adjacent to the body portion. A fuel pump adapter is removably and annularly disposed about the pilot portion and configured to engage a gear housing within a fuel pump aperture.