FrA05.6 zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Proceeding zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Drivetrain Innovations BV zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA of the 2004 American Control Conference 2,2004 Boston. Massachusetts June 30 -July Simulation and Control of an Automotive Dry Clutch www.aes.wtb.tue.nl zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Marc Dassen Maarten Steinbuch Alex Serrarens Control Systems Technology Control Systems Technology m.h.m.dassen@student.tue.nl serrarens@dtinnovations.nl m.steinbuch@tue.nl Technische Universiteit Eindhoven Faculty of Mechanical Engineering P.O. Box 513, 5600 MB Eindhoven, The Netherlands Absmacf-In this paper the dynamic behavior and control The pressure plate is connected by an axle to the gear box and the remaining part of the powertrain. As the clutch of an automotive dry clutch is analyzed. Thereto, a straight- forward model of the clutch is embedded within a dynamic engages the plates are pushed together by the actuator. model of an automotive powertrain comprising an internal When the plates touch, torque is transmitted from the engine combustion engine, drivetrain and wheels moving a vehicle to the drive train. The vehicle now starts to move. After a through tire-road adhesion. The engagement of the clutch is limited amount of time the speeds of the two plates will illustrated using the model best suited for simulation, based on work of Karnopp. These simulation results are used for become equal. The plates are then sticking and the engine is conceiving a decoupling controller for the engine and clutch directly connected to the drive train. To achieve a successful torque. Simulation results with the controller show significant engagement, the right input force has to be applied by the improvement over the un-controlled case in terms of vehicle actuator. This can be done by the driver through a foot launch comfort. A modified controller is proposed that results pedal or automatically by a programmed actuator force. One in even more appreciated drive comfort while not deteriorating other system behavior. advantage of controlling a clutch automatically is of course relieving the driver of the pedal clutching task. But also I. INTRODUCTION an automatic clutch can be optimized further. For example describe the engagement of an automotive zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Clutches in cars, trucks and other vehicles are used to wear can be predicted more accurately, because the forces acting on the clutchibrake components are known. Also fuel gradually engage the engine to the drivetrain while avoiding axial Pearing zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA unpleasant shocks, jerks and excessive drivetrain wear. A consumption during engagement can be minimized and the basic clutch has two plates that can he moved together by engagement time of the clutch can he shortened. an actuator that exerts a force on one of the two plates, A . Objectives see Fig. 1. This plate is called the pressure plate. The other The objectives of the reseach described in this paper are: plate-the friction p l a t e i s connected to the crank shah. dry clutch . in a dynamical model; transmission I torsional flexibilities, a zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA design an adequate controller for smooth clutch en- gagement based on this model; . simulate and analyse clutch engagement with the pressure pla model; diaphragm rpri optimize the engagement of the clutch within a re- stricted time window and drive comfort; torslo" rprmgr The non-linear dynamic model of the system comprises a petrol intemal combustion engine, a clutch system with 5 gear manual transmission, a crank s h a h torque, that results zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA final gear, differential, drive shafts, wheels and finally the vehicle body. For this system the launch behavior of friction plate ~ the vehicle needs to be optimized in terms of comfort and proper engine operation. Here, the control problem is flywheel' defined as: Specify an input force, as function of a desired wheel i n a smooth, though fast engagement of the clutch. The clutch engages smoothly if the torque transmitted has a continuous and preferably non-negative Automotive Dry Clutch (LuK) Fig. 1. derivafive aBer the clutch sfickr. 4078 0-7803-8335-4104/$17.00 02004 AACC
Recommend
More recommend
