Combustion Chamber Guide Ring for Fuel-Air Mixing
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Solution Overview
Problem
Diesel engines face challenges in achieving optimal fuel/air mixing due to limitations in fuel injection pressure, injector development, cylinder head layout, and structural strength, leading to low air utilization, high local concentrations, and fuel attachment to the wall surface, especially under high load conditions.
Innovation Solution
A ring apparatus is fixed to the cylinder head's bottom surface, positioned to guide fuel injection and interact with the fuel injector throughout the process, promoting mixing by altering fuel flow and distribution within the combustion chamber, and arranged in specific phases to enhance air-fuel interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fuel injection pressure is increased to improve atomization and fuel/air mixing, then fuel quality and mixing effectiveness are improved, but the injection system complexity and manufacturing cost increase
Solution Approach 1:
A guide ring is introduced as an intermediary component in the combustion chamber to assist fuel/air mixing. The guide ring redirects fuel flow and promotes turbulent mixing without requiring increases in injection pressure or complexity of the injection system itself.
Solution Approach 2:
The invention changes the flow direction and velocity distribution parameters of fuel by using the guide ring structure. This alters the mixing dynamics through geometric parameters rather than increasing injection pressure, thereby improving atomization quality without complicating the injection system.
2Manufacturing precision
If fuel injection angle is optimized to improve radial fuel distribution and air utilization, then mixing efficiency is improved, but the fuel injector development complexity increases
Solution Approach 1:
The guide ring serves as a mediator that works in conjunction with the fuel injector to achieve optimal fuel distribution. Instead of modifying the injector itself, the guide ring provides the additional geometric control needed for improved radial distribution and air utilization.
3Manufacturing precision
If intake port structure is optimized to promote airflow movement and fuel/air mixing, then mixing quality is improved, but the cylinder head layout complexity increases
Solution Approach 1:
The guide ring acts as an intermediary mixing enhancement device that complements the intake port airflow. By placing the guide ring in the combustion chamber, the invention achieves improved mixing quality without requiring complex modifications to the cylinder head layout or intake port structure.
4Manufacturing precision
If combustion chamber structure is optimized to promote vortex and guide fuel, then mixing effectiveness is improved, but the compression ratio and structural strength are limited
Solution Approach 1:
The guide ring is a simple intermediary component that provides fuel guidance and vortex promotion without requiring complex combustion chamber restructuring. This approach maintains structural strength while achieving improved mixing through the addition of a relatively simple ring component.
5Manufacturing precision
If the relative position between combustion chamber and fuel injector is changed during piston movement to maintain optimal fuel guidance, then mixing quality is improved, but the system complexity and control difficulty increase
Solution Approach 1:
The guide ring provides a fixed geometric structure that maintains optimal fuel guidance throughout the injection process. Instead of requiring active position adjustment mechanisms, the guide ring's stationary placement creates consistent flow guidance, simplifying the system while maintaining mixing quality.
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 solution improves air utilization, reduces emissions, increases power, and concentrates heat release, shortening combustion duration while maintaining stable pressure, with enhanced fuel-air mixing quality and reduced unburned HC and SOOT emissions.
Implementation Method 1
The ring is located in the area where fuel flows by in the combustion chamber... the ring can continuously guide the fuel in the fuel injection process... promoting mixing by altering fuel flow and distribution
Data Source
AI summary
The present invention discloses an apparatus for optimizing the fuel/air mixing process of an internal combustion engine. The bottom surface of the cylinder head is provided with a plurality of brackets; a ring is fixed to the brackets; and the ring may be an integrated ring body and may also be composed of a plurality of small segments. The ring is positioned opposite to a fuel injector and located in an area where fuel flows in the combustion chamber. The ring can continuously guides the fuel during the fuel injection process. The ring can be arranged in the liquid-phase region, the gas-liquid two-phase region or the gas-phase region. When the location of the ring interferes with the movement of valves of the internal combustion engine, the part of the ring body that interferes with the movement of the valves can be removed.