Fuel Pump Mounting to Cylinder Head Cap
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Solution Overview
Problem
Existing fuel pump mounting systems to engine cylinder heads are complex, prone to leakage, and suffer from increased wear and tear due to the use of external gaskets, which can lead to assembly complications and reduced lifespan.
Innovation Solution
A direct mounting system where the fuel pump is secured to a cylinder head cap with cap mounting bosses and a press-in-place gasket, minimizing the need for external gaskets and reducing assembly complexity while providing a tight seal to prevent leakage and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external gasket is used between the mounting plate and cylinder holder, then sealing is provided, but assembly complexity increases and leakage risk increases if not adequately installed
Solution Approach 1:
The patent removes the external gasket from the mounting system, eliminating the component that caused assembly complexity and leakage risks. The mounting plate is directly coupled to the cylinder holder without any intermediate gasket, simplifying the assembly while maintaining sealing through the direct mechanical connection and integrated seal design.
Solution Approach 2:
The patent integrates the sealing function directly into the mounting plate and cylinder holder assembly, merging the structural connection and sealing functions into a single unified system. This eliminates the need for a separate external gasket component, reducing assembly complexity while maintaining reliable sealing.
2Reliability
If an external gasket is used in the mounting system, then sealing is achieved, but the gasket is exposed to increased wear and tear which decreases lifespan
Solution Approach 1:
The patent eliminates the external gasket component entirely from the mounting system, removing the part that was subject to wear and tear. The sealing function is achieved through the direct coupling of the mounting plate to the cylinder holder, eliminating the lifespan limitation associated with gasket degradation.
Solution Approach 2:
The patent replaces the disposable external gasket with a permanent, durable mounting plate-to-cylinder holder connection. The integrated seal design eliminates the need for replaceable gasket components, extending the service life of the mounting system by removing the wear-prone element.
3Ease of operation
If a mounting plate with external gasket is used to mount the fuel pump, then the pump can be secured to the cylinder holder, but assembly complexity increases
Solution Approach 1:
The patent removes the external gasket from the mounting assembly, simplifying the components needed to secure the fuel pump to the cylinder holder. The mounting plate directly couples to the cylinder holder without requiring gasket installation, reducing assembly complexity while maintaining the mounting capability.
Solution Approach 2:
The patent combines the mounting and sealing functions into a single integrated assembly where the mounting plate directly couples to the cylinder holder. This merger eliminates the need for separate gasket components and their associated installation steps, reducing assembly complexity while maintaining full mounting capability.
Data Source
AI summary
Methods and systems are provided for mounting a fuel pump to a cylinder head of an engine. In one example, a mounting system may comprise: an engine fuel pump mounted directly to a cylinder head cap positioned underneath a cam cover, the cap including a raised portion having a first and a second cap mounting boss, and a main opening for directly receiving the fuel pump, wherein each of the first and second cap mounting bosses couple to a flange formed on a bottom portion of the fuel pump. In this way, the fuel pump may be directly mounted to the cylinder head cap to simplify assembly, minimize fuel leakage and reduce pump vibration.