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Hitachi

Hitachi Nico Transmission Co.,Ltd.

Controlling the hydraulic pressure applied to the clutch piston changes the torque transmitted by the clutch plate, for changing gear.
The speed of the output side is detected and fed back to the PID adjustment gage, to control and adjust the clutch hydraulic pressure, and thereby control speed.

Image: Conceptual diagram of rotary speed control by the Omega Clutch