This technology provides a mathematical model for the nonlinear multi-stage clutch damper with asymmetric torsional angles used in manual transmissions. It breaks down torque components into stiffness, hysteresis, and preload to analyze vibration impact in rotating systems under wide-open throttle (WOT) and inertial driving conditions.
Vibration impacts, such as gear rattle in vehicle drivetrains, originate from engine strokes and degrade both durability and sound quality due to clearance nonlinearities in rotating components. Previous studies focused on simplified gearboxes or specific gear pairs, making it difficult to reflect the characteristics of actual multi-stage clutch dampers with asymmetric torsional angles across various driving conditions.
This technology calculates total clutch torque by summing 2-stage and 3-stage stiffness torque, stage-specific hysteresis torque, and preload torque derived from modified relative displacement. By incorporating nonlinear elements into a 6-DOF linear time-invariant system, it compares vibration impacts based on engine speed and damper specifications. It can be applied to clutch damper selection and drivetrain NVH design, allowing for the prediction of rattle noise trends under various conditions before prototyping.
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