Servocom: how hydraulics support heavy steering

Useful to know

Bosch's Servocom is a hydraulic steering mechanism for heavy goods vehicles. The steering wheel is converted by mechanical gear, and a distributor directs oil to the chamber, which assists in movement. [1]

Here the hydraulic force is part of the control, not just the lubrication of the gears. This is different from a fully electric power steering system. When identifying a system, check the mechanism, pump, and connections as a whole. The presence of oil does not determine in itself the exact type: different structures use liquid for different functions.