E 320 4MATIC Sedan (210.082) V6-3.2L (112.941) (1999)
Electrically Controlled Reaction Functions (Part 1 Of 3)
Electrically Controlled Reaction Functions (Part 2 Of 3)
Electrically Controlled Reaction Functions (Part 3 Of 3)
NOTE:
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Numbers in parentheses ( ) indicate a component or tool in the associated illustration.
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The task of the electronic control of the Speed-sensitive Power Steering (SPS) (integrated in the Electronic Traction System (ETS), Acceleration Slip
Regulation (ASR) or Electronic Stability Program (ESP) control module) is to adjust a set hand force (K) at the steering wheel corresponding to the
respective vehicle speed.
The vehicle speed determined by the ETS, ASR or ESP control module is assigned a specified current in a performance map.
This is then adjusted in the SPS P-valve (proportional solenoid valve) and thus influences the oil flow (hydraulic reaction) within the rack and-pinion
steering.
The SPS P-valve is actuated in cycles.
The current control results from the pulse width modulation of this cycling.