Predicting the Launch Feel of Automatic and Dual Clutch Transmissions

This document explores the development of enhanced Powertrain Dynamics (PTDynamics) models in Dymola and Modelica for simulating and predicting the launch behaviour of vehicles with automatic and dual-clutch transmissions. The research focuses on advanced dynamic torque converter and wet clutch models that capture transient vehicle responses during launch, gear shifting, tip-in, and tip-out events.

By analysing the effects of oil temperature, clutch behaviour, drivetrain compliance, and dynamic torque transfer, the study demonstrates how high-fidelity simulation can improve the prediction of drivability metrics such as acceleration, jerk, and launch smoothness, supporting the optimisation of transmission control strategies, fuel efficiency, and overall vehicle performance.