Frictional Heat Generation in Wet Clutch Engagement according to Groove Pattern on Clutch Pad

Online Estimation of Clutch Drag Torque in Wet Dual Clutch Transmission Based on Recursive Least Squares

Hybrid optimal control of dry clutch engagement

Lately, the use of Automated Manual Transmissions (AMT) is increasing. A crucial role in AMTs is played by the engagement of the dry clutch, since the powertrain performance depends heavily on it. This is especially the case at a start-up from standstill, the so-called vehicle launch. The clutch engagement must be controlled in order to satisfy different, conflicting objectives: preservation of...

Fine Tuning of a Wet Clutch Engagement by Means of a Genetic Algorithm

In many practical engineering applications, a feed-forward control is often used to control the system with some parameterized signals, for example, a wet clutch system. Usually these signals are designed empirically. In this paper, firstly, genetic algorithm (GA) will be used to optimize parameters. Then by knowing the system response of the test bench in the frequency domain, GA will be used ...

Position and Velocity Predictions of the Piston in a Wet Clutch System during Engagement by Using a Neural Network Modeling

In a wet clutch system, a piston is used to compress the friction disks to close the clutch. The position and the velocity of the piston are the key effectors for achieving a good engagement performance. In a real setup, it is impossible to measure these variables. In this paper, we use transmission torque and slip to approximate the piston velocity and position information. By using this infor...

Clutch-to-clutch Shift Control of an Automatic Transmission with Proportional Pressure Control Valves

For a new kind of automatic transmissions using proportional pressure valves to control the clutches directly, a two-degree-of-freedom controller is designed for clutch slip control during the inertia phase of the shift process. The controller is designed based on a low order linear model which is derived from dynamics of the proportional pressure control valve and the vehicle drive line. The f...