gf3233p1002a

Level control system, basic function

Typ gf · téma 32.33 · verze 0103 · 2020-06-26

Platí pro: Model all (CAR)

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 2 Podvozek › 32 Odpružení › 32.33 Regulace výšky (NR/ENR) — Řada 900 (modely 9**) · Řada 902 (modely 9**) · Řada 904 (modely 918, 919, 924, 925, 938, 943, 957) · Řada 906 (modely 917, 918, 924, 953)

Platí také pro motory/převodovky: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF32.33-P-1002A

Level control system, basic function

22.06.2020

Model

all (CAR)

Overview

This document contains information on:

General

Function requirements

Function

General

The level control system controls the air suspension individually at each wheel. Under normal operating conditions, the air suspension operates with different pressures depending on the load. The vehicle level is reduced or increased depending on the selected drive program. In addition, the vehicle level can be changed by the driver by pressing the appropriate button.

Function requirements

Engine in operation

Function

Detection of vehicle level

The vehicle level is detected for each individual wheel by the following sensors:

Left front level sensor

Right front level sensor

Left rear level sensor

Right rear level sensor

Adjust vehicle level

To raise the vehicle level at the relevant wheel, the air pressure in the respective single-chamber air spring is increased.

To lower the vehicle level at the relevant wheel, air is released from the respective single-chamber air spring.

The single-chamber air springs are supplied with compressed air by the following sources:

Air suspension system central compressed-air reservoir

Air suspension system compressor, when the pressure in the central reservoir is not sufficient

To protect the compressed-air system against overloading, the air suspension control unit monitors the operating time of the air suspension compressor. The air suspension compressor is switched off for cooling when the maximum operating time is reached.

Increasing vehicle level

Air suspension compressor ON (when the pressure in the central reservoir is not sufficient)

Air suspension central reservoir filling valve open

Corresponding level control valve open

Air suspension pressure relief valve closed

Reduce vehicle level

Air suspension compressor OFF

Air suspension central reservoir filling valve closed

Corresponding level control valve open

Air suspension pressure relief valve open

Additional base function

Level control on rear axle, basic function

Model 213.2
as of model year 2021

GF32.32-P-9900A

Detailed information

Level control system, detailed information

Model 167
with code 430 (On & off-road package)
Model 167
with code 489 (AIRMATIC)
Model 167
with code 490 (Electrohydraulic suspension)

GF32.33-P-1100A

Components

Level sensor, basic function

Model all (CAR)

GF32.31-P-2001A

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