Adjustable Torque Converter Stator for K-Factor Tuning
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Solution Overview
Problem
Existing torque converters require disassembly and replacement of stators to adjust the K-factor, which is time-consuming and necessitates an inventory of various stators, making it difficult to quickly and easily change the stall speed and efficiency.
Innovation Solution
An adjustable two-part stator with opposing plates that can be slidably moved and secured by threaded fasteners to alter the size of fluid flow openings, allowing for incremental adjustments to the K-factor without replacing the stator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple stators with different designs are maintained in inventory to adjust K-factor, then adaptability is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The stator is divided into two separate plates (first plate and second plate) that can be independently adjusted. Each plate contains openings that can be positioned at different locations, and by adjusting the relative positions of these plates, different combinations of opening alignments are achieved, enabling multiple K-factor settings from a single stator assembly.
Solution Approach 2:
The stator transitions from a fixed configuration to a dynamically adjustable configuration. The plates can be moved relative to each other along the circumferential direction and secured at different positions using fasteners, allowing the stator to adapt its fluid flow characteristics based on operational requirements without requiring multiple pre-manufactured stators.
2Adaptability or versatility
If stator replacement is used to adjust K-factor, then adaptability is improved, but loss of time increases due to disassembly and reassembly
Solution Approach 1:
The stator incorporates movable plates with adjustable positions that can be reconfigured in place. The fasteners allow for quick loosening and tightening to secure the plates at different positions, enabling rapid K-factor adjustment without the need to remove and replace entire stator assemblies, significantly reducing adjustment time.
Solution Approach 2:
The stator assembly includes integrated adjustment mechanisms (fasteners and movable plates) that enable operators to perform K-factor adjustments themselves without requiring specialized tools or extensive disassembly procedures. The design allows for straightforward position changes and securing of plates directly within the torque converter housing.
3Manufacturing precision
If fixed stator design is used, then manufacturing precision is improved, but adaptability worsens
Solution Approach 1:
The stator is segmented into multiple plates, each with precisely manufactured opening patterns. The precision manufacturing is maintained for each individual plate, while the overall adaptability is achieved through the ability to reposition and recombine these precisely made plates in different configurations to create various effective opening patterns.
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
Enables quick and easy adjustment of the K-factor, eliminating the need for multiple stators and allowing for optimal stall speed settings, improving efficiency and reducing manufacturing costs.
Implementation Method 1
a plurality of threaded fasteners which are tightened to secure the adjustment plate in a selected position
Implementation Method 2
threaded fasteners
Implementation Method 3
When the engine shaft rotates the impeller, the fluid starts rotating as well. As the rotation speeds up, centrifugal forces cause the fluid to flow outward toward the impeller vanes.
Data Source
AI summary
A torque converter is provided with a stator having adjustable fluid flow holes for changing the K-factor of the torque converter, as needed. The stator includes a base plate with fluid flow openings and an adjustable plate with fluid flow openings. The plates matingly engage, such that the fluid openings are adjacent one another. The degree of overlap of the openings can be varied from fully aligned to substantially misaligned by rotating the adjustable plate relative to the base plate, and thereby controlling the fluid flow through the openings. In alternative embodiments the stator holes can be automatically opened and closed in response to changes in fluid pressure in the torque converter, via reed values or spring biased balls.