System composition

SYSTEM COMPOSITION

The ECVT consists of the following five elements: electromagnetic clutch, mechanism to select forward and reverse gears, belt and pulleys, hydraulic control unit and final reduction gearset.

The electromagnetic clutch allows the engagement or disengagementof the engine to the transmission. The clutch action is controlled by a microcomputer which uses various input signals; vehicle speed, en-gine RPM, accelerator pedal position, etc.

The mechanism for selecting forward and reverse gears uses a synchronising mechanism with straight gearteeth engagement. It is connected to the selector lever via a cable.

The belt-pulley group allows automatic smooth ratio changing. It rotates the final reduction gearset at continuously variable speeds, as a response to the engine power supplied to the electromagnetic clutch. The oil pressure supplied to the input and output shafts of this system is governed by the torque and the engine RPM, the accelerator pedal position, the pulley ratio, etc.