Supercharger control function - GF09.50-P-3001H
ENGINE 112.960 in MODEL 170.466
ENGINE 112.961 in MODELS 203.065 /265
The compressor (50) is switched on and off through actuation of the magnetic clutch on the mechanical supercharger (Y2/1) by the ME control unit 2.8.1.
The following information is essentially used by the ME 2.8.1 control unit for operating the supercharger:
- Engine speed
- Engine load
The magnetic clutch on the mechanical supercharger is actuated by the ME control unit 2.8.1 by means of a ground signal.
The voltage supply is performed via the:
Model 170 Relay module
Model 203 Front SAM control unit with fuse and relay module
The compressor is actuated between idling speed and an engine speed of about 2900 rpm when a high demand for torque (high engine loading) is present.
The actuation is undertaken according to the input signals and the performance map by the ME control unit 2.8.1
The compressor is always switched on from a speed of approx. 2900 rpm for technical reasons.
The compressor remains switched on during the thrust phase of the engine. This avoids any delay in actuation during the changeover from the thrust phase to the pulling phase.
The compressor is not actuated on a stationary vehicle, no matter what the engine speed is, to protect it.
The compressor is also not actuated when the battery voltage falls below 9 V or when an error is recognized in the charge air cooling system due to an implausible value from the temperature sensor.
The compressor is switched on shortly when starting with external temperatures below 0°C in order to free up the compressor from any icing which may have occurred (through the presence of condensate in the compressor).
Performing diagnostics on the magnetic clutch on the mechanical supercharger is only possible through the use of the menu "Actuations" for the ME 2.8.1 control unit in the STAR DIAGNOSIS equipment.
| ME-SFI control unit, location/task/design/function | N3/10 | GF07.61-P-5000H | |
| Kompressor location/task/design/function | 50 | GF09.50-P-3102H | |
| Magnetic clutch for the mechanical supercharger location/task/design/function | Y2/1 | GF09.50-P-3103H |