Estimation of dry clutch torque in automated manual transmission: vehicle test and real-time algorithm

In this paper, real-time identification of the dry clutch torque characteristic in automotive environment is investigated. The proposed algorithm provides direct capability for updating the clutch frictional torque map by using engine torque, engine speed and clutch speed as real time measurable signals. The algorithm purpose is the estimation of the clutch incipient sliding position or “kiss-point” in real-time vehicle environment. More launch maneuvers have been considered to test the methodology capabilities and promising results have been achieved.