Convenience automatic air conditioning (C-AAC) functional description table of contents - GF83.40-P-0996P
MODELS 203.0 /2 /7 up to 31.5.01 with CODE (581) Automatic air conditioning
MODELS 203.0 /2 /7 as of 1.6.01 with CODE (581) Comfort automatic air conditioning
| Convenience automatic air conditioning (C-AAC), function | GF83.40-P-0004P | ||
|---|---|---|---|
| Convenience automatic air conditioning (CAAC) networking of components | GF83.40-P-0004-01P | ||
| Ventilation system function | GF83.10-P-2000P | ||
| Heater circuit function | GF83.20-P-2003P | ||
| Refrigerant circuit function | GF83.40-P-2001P | ||
| Regulation of comfort automatic air conditioning, function | GF83.40-P-2006P | ||
| Temperature control function | GF83.57-P-2000P | ||
| Residual engine heat utilization function | GF83.75-P-2000P | ||
| Convenience automatic air conditioning (C-AAC) system component overview, location/ task/design/function | GF83.40-P-9996P |
Table of contents, automatic air conditioning (AAC) function description - GF83.40-P-0999P
MODEL 203.0 /2 /7 up to 31.5.01 with CODE (580) Air conditioning (or Tempmatic for USA)
MODEL 203.0 /2 /7 as of 1.6.01 with CODE (580) Automatic air conditioning
MODEL 203.0 /2 /7 as of 24.4.04 except CODE (581) Comfort automatic air conditioning
| Automatic air conditioning (AAC), function | GF83.40-P-0001P | ||
|---|---|---|---|
| Automatic air conditioning (AAC) component networking | GF83.40-P-0001-02P | ||
| Ventilation system function | GF83.10-P-2000P | ||
| Heater circuit function | GF83.20-P-2003P | ||
| Refrigerant circuit function | GF83.40-P-2001P | ||
| Regulation of automatic air conditioning, function | GF83.40-P-2004P | ||
| Temperature control function | GF83.57-P-2000PC | ||
| Residual engine heat utilization function | On vehicles with code (450) Taxi version or code (670) Residual engine heat utilization system (REST) | GF83.75-P-2000P | |
| Automatic air conditioning system component summary, location/task/design/function | GF83.40-P-9990P |
Convenience automatic air conditioning (C-AAC) system component overview, location/task/design/function - GF83.40-P-9996P
Model 203.0 /2 /7 up to 31.5.01 with CODE (581) Automatic air conditioning
Model 203.0 /2 /7 as of 1.6.01 with CODE (581) Comfort automatic air conditioning
| Control and operating unit comfort automatic air conditioning location/task | On vehicles up to 23.4.04 | GF83.40-P-2181PP | |
|---|---|---|---|
| On vehicles as from 24.4.04 with code (581b) Comfort automatic air conditioning | GF83.40-P-2181PQ | ||
| Front SAM control unit with fuse and relay module location/task/design | GF54.21-P-4108PP | ||
| Front driver-side door control unit, location/task/ design/function | GF72.29-P-4105PP | ||
| Front passenger's door control unit, location/ task/design/function | GF72.29-P-4106PP | ||
| Rear door control unit, location/ purpose/design/function | Only on model 203.0/2 | GF72.29-P-4102PP | |
| Electronic ignition switch control unit, location/ task/design/function | GF80.57-P-4102PP | ||
| Overhead control panel control unit, location/ task/design | GF82.20-P-4110A | ||
| Air ducting, location/task/function | GF83.10-P-2182P | ||
| Actuator motors for comfort automatic air conditioning, location/task/function | GF83.40-P-2183P | ||
| Blower motor, location/task/function | GF83.10-P-2140P | ||
| Blower regulator, location/task/function | GF83.10-P-2141P | ||
| Rear blower motor Location/task/function | On vehicles as from 1.6.01 with code (581b) Comfort automatic air conditioning | GF83.10-P-2168P | |
| Control unit for rear blower motor, location/task/design/function | On vehicles as from 1.6.01 with code (581b) Comfort automatic air conditioning | GF83.10-P-2169P | |
| Heating system heat exchanger, location/ purpose/function | GF83.20-P-2108P | ||
| Heater water circulation pump, location/task/ function | GF83.20-P-2109P | ||
| Dust filter, location/task/function | GF83.10-P-2142P | ||
| Activated-carbon filter, location/task/ function | GF83.30-P-2118P | ||
| Convenience air conditioner housing, location/ task/design/function | GF83.40-P-2170P | ||
| Electric fan motor/air conditioning system, location/task/function | GF83.40-P-2151P | ||
| Condenser location/task/function | GF83.40-P-2152P | ||
| Evaporator location/task/design/function | GF83.40-P-2121P | ||
| Fluid reservoir location/task/design/ function | GF83.40-P-2122P | ||
| Expansion valve, location/task/design/ function | GF83.40-P-2123P | ||
| Air conditioning coolant temperature sensor location/task/function | GF83.40-P-2155P | ||
| Refrigerant pressure and temperature sensor location/task/function | GF83.40-P-2171P | ||
| Refrigerant compressor, location/ task/design/function | GF83.55-P-2100P | ||
| Refrigerant compressor control valve location/ task/function | GF83.55-P-2102P | ||
| Belt pulley, location/task/design/function | GF83.55-P-2103P | ||
| Pressure relief valve, location/task/ function | GF83.55-P-2104P | ||
| Evaporator core temperature sensor, location/ task/function | GF83.57-P-2109P | ||
| Outside temperature sensor, location/ task/function | On vehicles up to 23.4.04 | GF83.57-P-2110P | |
| In vehicles as of 24.4.04 | GF83.57-P-2110PP | ||
| Multifunction sensor location/task/ function | GF83.10-P-2148P | ||
| Sun sensor location/task/function | GF83.57-P-2111P | ||
| Convenience automatic air conditioning (C-AAC) functional description table of contents | GF83.40-P-0996P |
Identifying Refrigerant Compressor Components. Scheme 1
Function
The rotary movement of the belt pulley (1) is transmitted via the refrigerant compressor shaft (13) to the stop plate (12), which is permanently fastened to the refrigerant compressor shaft (13) by way of a press fit.
The rotation of the stop plate (12) is transmitted to the swash plate (4) by means of a hinged mechanism.
Conversion of the swash plate's (4) rotary motion into the oscillating motion of the seven pistons (6) takes place via two sliding shoes each (11).
The evaporation tank on the pressure side (5) and evaporation tank on the suction side (7) reduce gas pulsation in the refrigerant compressor by providing for uniform refrigerant flow. This helps to prevent noise in the compression process
Volume control
The refrigerant compressor control valve (8) has a corresponding control current applied to it to match the output requested. This in turn enables the compression volume to be regulated between 2 and 100 %.
The position of the swash plate (4) is determined through monitoring, processing and evaluation of the following automatic air conditioning controlled variables
- Pressure in the crankcase (2) of the refrigerant compressor
- Diaphragm pressure in the refrigerant compressor control valve (8) (approx. 2 bar)
- Suction pressure of refrigerant compressor
The change in suction pressure which is dependent on the control current on the refrigerant compressor control valve (8) induces a change of pressure in the crankcase (2) and thus a corresponding adjustment of the swash plate (4).
Automatic air conditioning (AAC [KLA]) OFF
If the automatic air conditioning is regulated or manually switched off, the refrigerant compressor control valve (8) is completely opened. Refrigerant flows unobstructed over the high pressure side into the crankcase (2). This in turn leads to a rapid pressure rise in the crankcase (2). The coil body (10), for closing the refrigerant compressor, is displaced here to the right against the valve plate (9) and thus stops the flow of refrigerant over the intake side.
Refrigerant compressor lubrication when automatic air conditioning switched off
An internal lubrication circuit ensures the lubrication supply for all moving parts.
Lubrication is ensured at a minimum refrigerant compressor volumetric flow by means of two valves being regulated. In doing so, the refrigerant is transported together with the compressor oil located in the crankcase (2) over the bored refrigerant compressor shaft (13). The mixture enters the cylinder housing, where it is compressed and then pumped into the refrigerant circuit.