Launch Control of a Dual Clutch Transmission Using a Detailed Hydraulic Component Model

The Hong Kong Polytechnic University
Publication Type:
Conference Proceeding
Dynamics for Sustainable Engineering, 2011, pp. 2001 - 2006
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Dual clutch transmissions (DCTs) have emerged as a viable alternative to conventional planetary automatics and continuously variable transmissions (CVTs) with the development of precise control strategies. Although technology advancement greatly improves the transmission performance in recent years, undesirable vibration and noise is still the draw backs to DCT application. The hydraulic sub-component is a particular source of nonlinear response that influences launch performance. Clutch engagement judder, as part of vehicle noise, vibration and harshness (NVH), is an important vehicle attribute in the design of DCT which combines the advantages of manual transmission (MT) and conventional automatic transmission (AT). This paper studies the vehicle vibration during launch. In this paper, a system analytical model including detailed hydraulic control module will be presented for clutch engagement control during launch for vehicles having a DCT. And the control method mainly includes determining the engine throttle position and clutch pressure of the transmission to make the vehicle accelerate smoothly. In particularly, the attributes between launching with two clutches or one clutch are compared and evaluated, which are validated through simulation in MATLAB/Simulink.
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