Radial Gaseous Fuel Injector Collision for Mixing
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Solution Overview
Problem
Dual-fuel engines face inefficiencies in fuel mixing and retention due to gaseous fuel injection methods, leading to potential fuel escape and the need for engine modifications, which reduces cost efficiency and retrofit applicability.
Innovation Solution
A fuel system with multiple gaseous fuel injectors positioned radially within air intake ports to collide and enhance mixing, ensuring better retention and distribution of gaseous fuel within the combustion chamber, allowing for efficient dual-fuel operation without extensive engine modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If gaseous fuel is injected through a delivery conduit mounted above the intake ports, then fuel injection timing is improved (later injection after ports close), but manufacturing complexity increases (requires aperture modification)
Solution Approach 1:
The single delivery conduit above the intake ports is segmented into multiple injection points distributed among several intake ports. This allows the system to achieve proper fuel injection timing while using existing port structures, eliminating the need for aperture modifications and improving retrofit applicability.
Solution Approach 2:
The injection system transitions from a vertical arrangement (single conduit above ports) to a distributed radial arrangement (multiple injectors at port locations). This dimensional change allows fuel injection to occur at the port level rather than requiring overhead conduit installation, resolving the conflict between injection timing and manufacturing ease.
2Stability of the object's composition
If gaseous fuel is injected while intake ports are open, then fuel mixing with intake air is improved, but fuel loss increases (fuel may escape through ports)
Solution Approach 1:
The system performs preliminary fuel injection actions through multiple intake ports positioned to inject fuel radially into the combustion chamber. This preliminary distribution of fuel through multiple pathways ensures thorough mixing with intake air while the port geometry and injection timing prevent fuel escape, resolving the contradiction between mixing quality and fuel retention.
3Device complexity
If single gaseous fuel injector is used, then device complexity is reduced, but fuel mixing efficiency deteriorates
Solution Approach 1:
The single injector is segmented into multiple injectors distributed across different intake ports. Each injector contributes to the overall fuel distribution, creating multiple fuel streams that collide and mix within the combustion chamber. This segmentation improves mixing efficiency while maintaining relatively simple device architecture through modular injector placement.
Solution Approach 2:
Multiple fuel streams from different injectors are merged through collision within the combustion chamber. This merging of separate fuel injections creates enhanced mixing patterns that improve fuel-air homogeneity, achieving better mixing efficiency without requiring a single complex injector system.
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 system improves fuel retention and mixing efficiency, reducing fuel escape and enabling cost-effective, cleaner engine operation with enhanced retrofit compatibility by utilizing multiple gaseous fuel injectors to collide and disperse fuel within the combustion chamber.
Implementation Method 1
a second fuel injector configured to inject a second stream of gaseous fuel radially into the combustion chamber through a second air intake port to collide with the first stream of gaseous fuel
Data Source
AI summary
A fuel system for an engine is disclosed. The fuel system may have a first fuel injector configured to inject a first stream of gaseous fuel radially into a combustion chamber of a cylinder of the engine through a first air intake port. The fuel system may also have a second fuel injector configured to inject a second stream of gaseous fuel radially into the combustion chamber through a second air intake port to collide with the first stream of gaseous fuel.