The role of the steering system
The steering system is the key interface
between driver and vehicle
The challenges faced by the steering system are clear: the steering should be precise, with no play. It should be smooth and direct, compact and light. In addition, it must also provide the driver with a perfect feel for the road surface and help the wheels return to the straight-ahead position.
When it comes to safety potential, the power steering gear really comes into its own at high speeds. Abrupt steering corrections - when maneuvering to avoid an obstacle - are easy to master thanks to the power assistance provided by the Servotronic mechanism. Also, the hydraulic system will compensate for the most part for sudden, one-sided steering forces. The driver is able to react to the surprise, keep the vehicle on track and bring it to a safe stop.
And all this requires a minimal effort on the steering wheel. And finally, modern steering systems must also work in tandem with driver assistance systems and make an active contribution to reducing fuel consumption.
Schematic representation of the ZF Servotronic®
1. Electronic speedometer in the vehicle
2. Electronic control unit (ECU)
3. Electro-hydraulic transducer
4. Rack and pinion power steering gear
5. Steering pump
6. Oil reservoir with fine filter
7. Anti-vibration expansible hose
8. Manually adjustable steering column