Fuel Injector Flange Seating Cylinder Head Shoulder
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel injector systems face challenges in aligning nozzle holes with ducts, leading to reduced fuel and air mixing and combustion stability due to misalignment issues.
Innovation Solution
A fuel injector system is designed with a flange that seats within a shoulder on the cylinder head, increasing the alignment of nozzle holes with ducts, and the ducts are positioned at the inner side of the cylinder head, allowing for increased length and improved mixing of fuel and air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ducts are coupled to fuel injector using threaded body and locator ring, then ducts can be secured proximate to nozzle, but alignment of nozzle holes with ducts becomes difficult and misalignment occurs
Solution Approach 1:
The patent combines the duct assembly with the fuel injector by integrating the ducts directly into the fuel injector body, eliminating separate coupling components like threaded bodies and locator rings. This integration ensures precise alignment between nozzle holes and ducts while maintaining secure positioning, thereby resolving the contradiction between reliability and manufacturing precision.
Solution Approach 2:
The patent introduces a shoulder-formed passage opening in the cylinder head as an intermediary structure that receives and positions the fuel injector. This passage opening provides a precise mounting interface that ensures correct alignment of the nozzle with the ducts, solving the alignment precision issue while maintaining combustion stability.
2Productivity
If duct length is increased relative to passage diameter to improve fuel-air mixing, then mixing efficiency increases, but device complexity and alignment difficulty increase
Solution Approach 1:
By merging the ducts with the fuel injector body into a single integrated component, the patent simplifies the overall device structure while allowing the ducts to be extended in length. This integration eliminates the need for separate coupling mechanisms, reducing device complexity while maintaining the benefit of increased duct length for improved fuel-air mixing.
3Manufacturing precision
If flange is made wider than fuel injector body to seat within shoulder, then alignment of nozzle with ducts is increased, but device dimensions increase
Solution Approach 1:
The patent applies local quality by creating a shoulder-formed passage opening in the cylinder head that provides a localized seating area for the fuel injector. This localized structural feature enables precise alignment without requiring a larger overall flange size, thereby maintaining compact dimensions while achieving high alignment precision.
Data Source
AI summary
Methods and systems are provided for a fuel injector of an internal combustion engine. In one example, a fuel injector includes a body having a flange shaped to seat within a shoulder of a passage of a cylinder head. The shoulder is positioned at an inner side of the cylinder head such that the fuel injector is coupled to the cylinder head at the inner side by the flange.