Electromechanical Power Steering - Volkswagen Caddy 2004 Self-Study Programme

Chassis

Electromechanical power steering

The 2004 Caddy is equipped with a
electromechanical power steering system
(manufacturer ZF), which is made up of the
following main components
– the steering wheel and
– the electric motor with integrated control unit.
The steering system is mounted on the subframe.
The control unit is flanged to the electric motor.
Data for managing the steering is exchanged via
the drive CAN data bus.
Electromechanical power steering
Assembly carrier
(subframe)
40
Advantages of this steering system are:
– Simpler packaging (no need for traditional
components like a power steering fluid pump,
hoses, fluid reservoir and hydraulic fluid).
– Lower fuel consumption (~0.15 l/100 km)
– Speed-related steering assist (Servotronic)
– No risk of pollution as no oil is required.
– Good straight-line stability due to "active
return" and the resulting precise centre-return
of steering.
S328_170
Electric motor with
control unit
S328_050