Electro-Hydraulic Steering System Servotwin

Bosch

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Overall system

Electro-hydraulic steering system for heavy commercial vehicles

​The electro-hydraulic steering system offers speed-dependent steering support with active response and consumes less fuel than purely hydraulic steering

​RB-Servocom
​Electric servo unit

The Servotwin augments the RB-Servocom hydraulic steering gear by one electric servo unit. In addition to the steering wheel actuating torque, the servo unit can increase the torque acting upon the steering gear.
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RB-Servocom

The housing of RB-Servocom comprises steering valve, working cylinder, as well as a complete mechanical steering gear.
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Helical gear drive

The main components of the electric servo unit are the electric motor, helical gear drive, control unit, torsion bar and a torque/steering angle sensor
Thanks to its electronic inter-face, the steering system is simultaneously the basis for driver assistance functions such as a lane-keeping assistant or cross-wind compensation.

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