Cylinder Head Air Guide Section for Hydrogen Engine Fuel Mixing
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Solution Overview
Problem
Existing cylinder heads for internal combustion engines, particularly those using hydrogen fuel, suffer from clogging and backfire issues due to atomizing screens in intake ports, which impair fuel supply and mixture formation.
Innovation Solution
A cylinder head design featuring a tubular injection tube with an attachment element having a radially outward-facing air guide section that enhances turbulence in the intake air, improving fuel-air mixing and preventing clogging by maintaining an unobstructed fuel flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an atomizing screen is used in the injection tube to improve fuel-air mixing, then mixture formation is improved, but the injection tube becomes clogged during operation and fuel supply is impaired
Solution Approach 1:
The harmful atomizing screen is completely removed from the injection tube. Instead, a separate air guide section is introduced that performs the mixing function without creating clogging issues, thus extracting the problematic component while preserving the beneficial mixing effect
Solution Approach 2:
The injection tube is divided into functional sections: a fuel injection section and a separate air guide section. This segmentation allows the air guide section to handle air flow and turbulence generation without the fuel supply path being blocked, separating the mixing function from the fuel delivery path
2Manufacturing precision
If an atomizing screen is used in the injection tube to improve fuel-air mixing, then mixture formation is improved, but fuel is retained within the tube leading to backfires
Solution Approach 1:
The atomizing screen that causes fuel retention is removed. The air guide section is introduced instead, which generates turbulence for mixing without creating pockets where fuel can be trapped, thereby eliminating the backfire hazard
Solution Approach 2:
The design uses the radial outward orientation of the air guide section to create beneficial turbulence that promotes complete fuel consumption, converting what would have been a harmful fuel retention issue into a benefit where all fuel is burned before potential backfire conditions can arise
3Manufacturing precision
If a radially outward-facing air guide section is added to the injection tube to enhance turbulence and mixing, then mixture formation is improved, but the device complexity increases
Solution Approach 1:
The air guide section is merged with the injection tube as an integrated component rather than a separate attachment. This combining approach improves mixture formation while minimizing the increase in device complexity by using a unified structure
Solution Approach 2:
The air guide section extends radially outward from the injection tube, adding a dimensional element that creates turbulence without requiring complex internal structures. This dimensional addition achieves improved mixing with relatively simple geometric modification
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design ensures favorable mixture formation and reduces the risk of clogging, enhancing the service life of the injection tube by supporting it against the intake port wall and maintaining fuel flow integrity.
Implementation Method 1
The radially outward-facing air guide section creates a more turbulent flow in the intake air downstream of it, which improves the mixing of the intake air with the fuel injected into the intake port via the injection tube
Data Source
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AI summary
Cylinder head for an internal combustion engine comprising: a cylinder head assembly having an inlet port (7), an injector (18) connected to the cylinder head assembly, and a tubular injection tube (19) extending along a tubular liner (L19) into the inlet port (7) and fluidically connected to the injector (18), wherein an attachment element (21) is arranged on the injection tube (19), and the attachment element (21) has an air guide section (25, 26, 27) extending radially outwards with respect to the tubular liner (L19) such that a flow in the inlet port (7) is influenced by the air guide section (25, 26, 27).