Inward Outward Valve Assembly Fluid Pressure Control
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Solution Overview
Problem
Existing injection valve designs, particularly inward and outward opening injectors, face challenges in achieving efficient fluid pressure management and emission control, with hydraulically balanced outward opening injectors being complex and prone to uncontrolled opening, while hydraulically unbalanced designs lack controlled fluid pressure control.
Innovation Solution
A valve assembly arrangement combining inward and outward opening valve assemblies, where the inward opening type injects fluid into the outward opening type to increase pressure and enable fluid dispensing, utilizing a perforated disc and springs for controlled fluid flow, eliminating the need for a bellows and reducing the risk of uncontrolled opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydraulically balanced outward opening injector is used, then fluid pressure control is improved, but device complexity increases and risk of uncontrolled opening increases
Solution Approach 1:
The patent combines an inward opening valve assembly and an outward opening valve assembly into a single integrated valve body, merging two previously separate components into one unified structure that achieves hydraulic balance while simplifying the overall device architecture
Solution Approach 2:
The valve body is segmented into two distinct valve assemblies (inward opening and outward opening) that operate independently but work together to achieve controlled fluid pressure management, with each assembly handling specific pressure control functions
2Device complexity
If a hydraulically unbalanced outward opening injector is used, then device complexity is reduced, but fluid pressure control capability is lost
Solution Approach 1:
By merging the inward opening and outward opening valve assemblies into one integrated structure, the patent achieves hydraulic balance (improving pressure control) without requiring multiple separate components, thus maintaining relatively simple device complexity
3Productivity
If an inward opening valve assembly is used, then fluid dosing capability is improved, but ability to dispense fluid directly is limited
Solution Approach 1:
The integrated valve body provides multi-functionality by enabling both fluid dosing (through the inward opening valve assembly) and direct fluid dispensing (through the outward opening valve assembly), allowing the single device to perform multiple operations that previously required separate components
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
This configuration enhances exhaust emissions characteristics, provides reliable and precise fluid dispensing, and simplifies the fuel supply line by controlling fluid pressure through the inward opening valve assembly, reducing the risk of uncontrolled opening compared to hydraulically unbalanced designs.
Implementation Method 1
a first spring, and wherein the valve assembly of the outward opening type comprises a second valve body comprising a second cavity
Implementation Method 2
the second spring is operable to bias the second valve needle towards its closing position by means of mechanical interaction with the perforated disc
Implementation Method 3
an actuator unit being designed to actuate the first valve needle
Implementation Method 4
the actuator unit is of the piezo type
Data Source
AI summary
A valve assembly arrangement for an injection valve may have a central longitudinal axis, a valve assembly of the inward opening type, and a valve assembly of the outward opening type, wherein the valve assembly of the outward opening type is axially arranged adjacent and fixedly coupled to the valve assembly of the inward opening type such that the valve assembly of the inward opening type is operable to inject fluid into the valve assembly of the outward opening type for increasing a fluid pressure in the valve assembly of the outward opening type to open the valve assembly of the outward opening type to enable dispensing of the fluid from the valve assembly arrangement.