Limited Slip Differential Clutch Assembly for Adaptive Torque Bias
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Solution Overview
Problem
Limited slip differential assemblies with fixed minimum torque thresholds for slippage can be disadvantageous in situations where varying torque conditions require adaptive torque distribution between differential inputs and outputs.
Innovation Solution
A driveline power transmitting component with a differential assembly featuring multiple friction clutches and biasing springs, where the torque bias ratio varies with the magnitude of torque transmitted, allowing for adaptive engagement of clutch plates to resist relative rotation and distribute torque effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed minimum torque threshold is used for slippage between differential input and outputs, then the limited slip differential assembly provides a desired minimum torque-carrying capacity, but the fixed torque threshold is disadvantageous when varying torque conditions require adaptive torque distribution
Solution Approach 1:
The clutch assembly is divided into multiple clutch packs, with each clutch pack containing friction plates and biasing springs. This segmentation allows different clutch packs to engage at different torque thresholds, enabling adaptive torque distribution across varying operating conditions while maintaining a manageable structural complexity through modular design
Solution Approach 2:
The limited slip differential assembly transitions from a fixed torque threshold design to a dynamic system where multiple clutch packs with different biasing spring preloads engage at varying torque levels. This dynamic engagement allows the torque distribution to adapt automatically to changing operating conditions, improving versatility without requiring complex active control systems
2Adaptability or versatility
If multiple friction clutches with different biasing spring preloads are used, then adaptive torque distribution is achieved, but the device complexity increases
Solution Approach 1:
The clutch assembly is segmented into multiple clutch packs, with each clutch pack containing friction plates and biasing springs. This segmentation allows different clutch packs to engage at different torque thresholds, enabling adaptive torque distribution across varying operating conditions while maintaining a manageable structural complexity through modular design
Solution Approach 2:
Different biasing spring preloads are applied to different clutch packs, creating distinct engagement torque thresholds. This parameter variation allows the system to adapt torque distribution to different operating conditions automatically, achieving versatility through controlled parameter diversity rather than complex control mechanisms
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 enables a dynamic torque bias ratio that increases with torque magnitude, providing enhanced torque distribution and resistance to relative rotation, improving the performance of limited slip differential assemblies under varying conditions.
Implementation Method 1
The first biasing spring urges the first friction clutch into an engaged condition
Implementation Method 2
the at least one friction plate of the first friction clutch is frictionally engaged to the first differential output to thereby resist relative rotation
Data Source
AI summary
A driveline power transmitting component with a differential assembly having a differential input, first and second differential outputs, which are driven by the differential input, a first friction clutch, a first biasing spring and a second friction clutch. The first friction clutch has a friction plate that is non-rotatably but axially slidably coupled to the differential input. The first biasing spring urges the first friction clutch into an engaged condition in which the friction plate of the first friction clutch is frictionally engaged to the first differential output. The second friction clutch has a plurality of first clutch plates, which are axially slidably but non-rotatably coupled to the differential input, and a plurality of second clutch plates that interleaved with the first clutch plates and axially slidably but non-rotatably coupled to the first differential output.