Variable Switching Solenoid Valve for Turbo-GDI Purge Backflow
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Solution Overview
Problem
Conventional solenoid valves in turbo-GDI engines face challenges with complex structure, potential backflow, odor generation, and incomplete purging due to high intake manifold pressure, requiring additional check valves that can lead to blockage and structural issues.
Innovation Solution
A solenoid valve with variable switching means, including armatures operated by a solenoid to control fluid flow between multiple outlets connected to the intake manifold and air cleaner, with a control unit that adjusts outlet operation based on intake manifold pressure, eliminating the need for separate check valves by managing fluid flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If check valves are added to prevent backflow in dual purge system, then fluid flow control is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single solenoid valve body structure. The valve body integrates fluid introduction pathways, multiple discharge outlets, and internal flow control mechanisms that work together to prevent backflow without requiring separate check valves. This merging of functions reduces overall system complexity while maintaining backflow prevention capability.
Solution Approach 2:
The solenoid valve is designed with multi-functionality to handle both purge operations and backflow prevention within a single device. The valve body structure provides universal functionality by incorporating multiple outlets for different purge paths and internal mechanisms that automatically prevent backflow, eliminating the need for dedicated check valves for each purge line.
2Reliability
If check valves are installed in purge lines, then backflow is prevented, but manufacturing cost increases
Solution Approach 1:
The patent merges backflow prevention functionality into the main solenoid valve body structure, eliminating the need for separate check valve components. This consolidation reduces part count, simplifies assembly procedures, and lowers manufacturing costs while maintaining effective backflow prevention through the integrated valve design.
3Reliability
If multiple check valves are used in dual purge system, then fluid flow control is improved, but maintenance difficulty increases
Solution Approach 1:
The patent combines multiple flow control and backflow prevention functions into a single integrated solenoid valve assembly. This reduces the number of components that require maintenance and simplifies repair procedures, as technicians only need to service one valve unit rather than multiple separate check valves distributed throughout the purge 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 solution simplifies the dual purge system structure, reduces costs by removing check valves, improves system quality, and prevents issues like blockage and fixation, ensuring effective fluid discharge and purging in turbo-GDI engines.
Implementation Method 1
An armature 500 operated by a solenoid 300 to open or close each of the outlets 130
Data Source
AI summary
The present disclosure provides a solenoid valve including: a valve body having an inlet through which a fluid is introduced, and a plurality of outlets through which the introduced fluid is discharged, and a variable switching device for discharging the fluid introduced from the inlet through a selected one of the outlets by a control unit.