Control Valve Spool Guide Flow Belt Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional control valves for variable cam phasers are complex, require extensive machining, and have cumbersome dimensional management, leading to increased flow forces and reduced flow rates.
Innovation Solution
A simplified control valve design that integrates a valve housing, spool guide, and flow guide belt to form fluid conduits, reducing component proliferation and allowing for easier assembly and increased flow rates, with a spool mechanism that controls fluid flow between inlet and outlet ports to adjust camshaft timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional control valve design is used, then flow control precision is achieved, but device complexity and machining difficulty increase
Solution Approach 1:
The patent combines multiple functions into the spool component, which integrates flow control, sealing, and positioning functions. The spool works with the valve body to create integrated flow paths, reducing the need for separate components and complex assemblies while maintaining precise flow control capability.
Solution Approach 2:
The valve design achieves multi-functionality through the spool mechanism that can control multiple flow paths (supply, exhaust, bypass) with a single component. The spool's position changes enable different flow configurations, allowing one component to perform multiple control functions that would traditionally require separate valves or complex mechanisms.
2Manufacturing precision
If conventional control valve design is used, then flow control is achieved, but machining operations and dimensional management become cumbersome
Solution Approach 1:
The patent integrates flow path definitions directly into the spool and valve body geometries, combining what would traditionally be separate machined features into unified structures. This integration simplifies the number of machining operations required while ensuring precise flow control through the geometric relationship between spool and valve body features.
3Manufacturing precision
If conventional valve design with multiple components is used, then flow control is achieved, but fluid flow forces increase and flow rate decreases
Solution Approach 1:
The patent extracts and eliminates unnecessary intermediate components from the fluid path, creating direct flow paths between supply, exhaust, and bypass ports. This extraction of redundant elements reduces flow resistance and minimizes fluid forces while maintaining precise control capability through the spool mechanism.
Solution Approach 2:
Instead of using multiple separate components to control flow, the patent inverts the approach by using a single spool component that actively manages multiple flow paths simultaneously. This inversion reduces the cumulative effect of multiple interfaces and seals that would increase fluid forces and reduce flow rate.
Data Source
AI summary
A control valve includes a valve housing extending along a longitudinal axis. The valve housing defines an inlet port, a first outlet port, and a second outlet port. In addition, the control valve includes a spool guide disposed inside the valve housing and a flow guide belt disposed around the spool guide. The flow guide belt is disposed inside the valve housing. The control valve further includes a spool movably disposed in the spool guide. The spool can move relative to the valve housing along the longitudinal axis between a first spool position and a second spool position. The first outlet port is in fluid communication with the inlet port when spool is disposed in the first spool position.