| 摘要 |
PURPOSE: A clutch is provided to improve the fuel efficiency of a vehicle and to reduce exhaust gas by improving transmission efficiency due to reduced drag torque generating from a clutch. CONSTITUTION: A clutch(200) comprises a connection hub(210), a clutch hub(250), a first piston(260), a second piston(270), and a return spring. The connection hub is connected to an input shaft to be rotated and an operating plate is installed in a clutch retailer. The clutch hub has a friction disk(240) which selectively contacts the operating plate(230). The first piston moves in a first axial direction by oil supplied to a first piston chamber(265). The second piston moves in the first axial direction by oil, which is supplied to a second piston chamber(275), and the movement of the first piston. The return spring pushes the first or the second piston in a second axial direction which is opposite to the first axial direction.
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