Fluid Injector Spray Disc Offset Channel Architecture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fluid injectors for internal combustion engines fail to consistently produce fine swirl spray patterns, which are necessary for improved emission quality, fuel consumption, and engine performance due to strict emission standards.
Innovation Solution
A fluid injector design featuring a disc member with offset channels and orifices, where each orifice is fluidly coupled to multiple channels, creating a swirl flow pattern by disrupting the symmetry of fluid flow, resulting in a swirl spray pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional fluid injector designs are used, then the structure is simple, but the spray pattern does not achieve consistent fine swirl
Solution Approach 1:
The patent applies asymmetry by configuring channels in an offset arrangement relative to the orifices, rather than symmetric alignment. This asymmetric channel-orifice configuration disrupts symmetric flow patterns and generates the desired swirl spray pattern. The offset channels create asymmetric flow paths that induce rotational motion in the sprayed fluid, resolving the contradiction between structural simplicity and spray pattern quality.
Solution Approach 2:
The patent segments the fluid flow path into multiple separate channels that converge at orifices, rather than using a single continuous passage. This segmentation allows independent control and optimization of flow characteristics in each channel, enabling precise control over the swirl pattern generation while maintaining manufacturing feasibility through modular channel design.
2Object-generated harmful factors
If fine atomization is achieved through complex metering techniques, then emission quality improves, but device complexity increases
Solution Approach 1:
The patent changes the flow parameters by using offset channels to create swirl flow patterns, transforming the fluid dynamics characteristics without requiring complex metering mechanisms. This parameter change in flow pattern (from linear to swirl) achieves fine atomization and improved emission quality while avoiding the need for complicated control systems or multiple metering stages.
Solution Approach 2:
The patent replaces complex mechanical metering techniques with a geometric solution - the offset channel architecture. Instead of using complex mechanical devices to control and atomize the fluid, the invention uses the geometric arrangement of channels relative to orifices to naturally generate the desired spray characteristics, simplifying the overall system while achieving the same emission benefits.
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 effectively produces a swirl spray pattern that enhances fuel atomization and emission control, improving engine performance and reducing emissions.
Implementation Method 1
The channels fluidly coupled to each orifice are in offset relation to each other at the orifice such that fluid flowing through and exiting the orifices from the channels form a swirl pattern
Data Source
AI summary
A fluid injector for injecting fluid includes a body with a fluid passageway extending from an inlet to an outlet of the fluid injector; a valve seat; a valve element that is selectively engages with the valve seat; and a disc member disposed in the fluid passageway downstream of the valve seat. The disc member includes a plurality of channels defined along a first surface of the disc member, and a plurality of orifices defined through the disc, with each disc member being fluidly coupled to a plurality of channels. The channels fluidly coupled to each channel are in offset relation to each other at the orifice such that fluid flowing through the orifice forms a swirl pattern when exiting the orifice.