Two-Stage Valve Assembly for High-Flow Vehicle Lift Pressure Control
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Solution Overview
Problem
Traditional solenoid poppet valves in vehicle lift systems face limitations in meeting high flow and pressure requirements, often necessitating larger return springs and increased power input, which is constrained by physical size limitations.
Innovation Solution
A two-stage valve assembly with an armature assembly that includes a plunger and poppet seal, allowing for selective fluid flow through multiple positions, reducing pressure requirements by staging fluid flow and eliminating the need for larger return springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If larger flow and increased sealing areas are used to meet higher flow requirements, then flow capability is improved, but pressure capabilities are reduced
Solution Approach 1:
The valve is divided into two stages: a first-stage valve with a first sealing area for initial fluid flow control, and a second-stage valve with a second sealing area for additional flow control. This segmentation allows each stage to handle portions of the flow requirement, achieving high total flow capability while maintaining smaller individual sealing areas that can sustain higher pressures.
2Stress or pressure
If a larger return spring is used to meet increased counter-seal leak and pressure requirements, then pressure capability is improved, but device size increases
Solution Approach 1:
The return spring function is segmented across two stages. The first return spring is associated with the first-stage valve and the second return spring with the second-stage valve. This allows each spring to be smaller and less powerful than a single large spring would need to be, reducing overall device size while maintaining the capability to handle high pressures.
Solution Approach 2:
The valve employs dynamic staging where the first-stage valve operates at lower pressures and the second-stage valve engages at higher pressures. This dynamic operation allows smaller, lighter components to achieve the same overall pressure handling capability as a single large valve would require.
3Power
If power input to the solenoid is increased to overcome valve limitations, then flow and pressure control is improved, but physical size constraints are exceeded
Solution Approach 1:
The solenoid system is segmented into a first solenoid for controlling the first-stage valve and a second solenoid for controlling the second-stage valve. This segmentation distributes the power requirements across two smaller solenoids rather than requiring one large solenoid, allowing the system to achieve high flow and pressure control capability while maintaining a compact overall package size.
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
Improves operational efficiency and reduces the need for increased power input by staging fluid flow, enhancing the ability to manage higher flow and pressure demands without enlarging the solenoid valve package.
Implementation Method 1
a stator located in the first end and an armature assembly moveable along the axis between the stator and the second end
Data Source
AI summary
The two-stage valve assembly for a vehicle lift system comprises an outer sleeve extending along an axis between a first end and a second end. A stator is located in the first end and a valve opening is located in the second end. The two-stage valve assembly includes an armature assembly for selectively closing the valve opening and opening the valve opening in a first-stage open position and a second-stage open position. The armature assembly comprises a plunger moveable along the axis that includes a poppet portion having a poppet seal oriented towards the second end. A plunger seat is moveable along the axis and located between the poppet portion and the valve opening. The plunger seat includes a seat seal for sealing against the valve opening. A seat channel extends through the seat seal and the plunger seat and is in fluid communication with the valve opening.