Power Cylinder

The gearbox integrates the control valve and power cylinder into a single unit. The rack shaft serves as a power cylinder piston. The rotary control valve is located around the pinion shaft.

The rotary control valve and power cylinder are connected to each other by two hydraulic fluid pipes.

Fig 1: Identifying Piston, Cylinder, Power Cylinder, Rack Shaft, Pinion Shaft And Control Valve

Courtesy of SUBARU OF AMERICA, INC.