Adaptive Damping System, Basic Function - GF32.32-P-1004A
Model all (CAR)
Overview
This document contains information on:
- General
- Function requirements
- Function
General
The Adaptive Damping System (ADS) is a combination of steel or air suspension with active damper adjustment. The damping mode selected by the driver adjusts the damping characteristic on a wheel-specific basis to the road surface condition and the driving style. The damping is adjusted harder or softer depending on the driving situation. If the sensor system records a sporty driving style for example, the comfortable basic damping becomes harder automatically. The electronics works continuously within a broadly spread damping performance map.
Function requirements
- Ignition ON (circuit 15)
Function
Damping mode can be selected by the driver using the DYNAMIC SELECT switch.
The drive status is determined to enable the damping characteristic to be adapted to the road surface condition and driving style.
For this purpose, the ADS control unit reads in signals from the level sensors and information from the Electronic Stability Program (ESP®) control unit, the instrument cluster control unit and the powertrain control unit. To change the damper characteristic, the ADS control unit actuates the damping valve units on the shock absorbers.
The damping valve units are mounted in the damper on the piston rod or on the damper tube. The damping valve unit regulates the amount of oil flow from one chamber to another by changing the flow area. The characteristic of the dampers can be changed using the amount of oil flow.
The flat slide valve closes the flow to the comfort valve and the entire oil flow must pass the main piston.
In order to reduce the body's pitch and rolling motions and to optimize wheel loads and adhesion of the tires, the damping becomes harder during acceleration, braking or steering maneuvers.
| Function schematics | |||
| Function schematic for ADS | Model 118, 177, 247 with code 459 (Steel suspension with adjustable damping) | PE32.32-P-2500-97A | |
| Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) | PE32.32-P-2500-97B | ||
| Model 213, 238, 257, 290 as of model year 2021 with code 489 (AIRMATIC Dual Control/semi-active air suspension) | PE32.32-P-2500-97C | ||
| Model 223 with code 490 (Electrohydraulic suspension) | PE32.32-P-2500-97D | ||
| Model 223 with code 489 (AIRMATIC Dual Control/semi-active air suspension) Model 295 with code 489 (AIRMATIC Dual Control/semi-active air suspension) Model 297 with code 489 (AIRMATIC Dual Control/semi-active air suspension) | PE32.32-P-2500-97E | ||
| Model 243 with code 457 (Comfort suspension with adjustable damping) | PE32.32-P-2500-97F | ||
| Model 206 with code 459 (Steel suspension with adjustable damping) | PE32.32-P-2500-97G | ||
| Model 232 with code 459 (Steel suspension with adjustable damping) Model 232 with code 470 (Semi-active roll stabilization (Semi ARS)) | PE32.32-P-2500-97H | ||
| Additional basic functions | |||
| Adjustable damping, basic function | Model all (CAR) | GF32.22-P-1003A | |
| Record driving condition, basic function | Model all (CAR) | GF32.32-P-1006A |