Compressor Clutch

- Refrigerant Compressor (KMV)
The refrigerant compressor compresses the refrigerant gas inducted from the evaporator and forces it to the condenser.
The compressor does not have a clutch and it always operates when the engine is running.
The compressor output is variable and is controlled internally by signals from the IHKA control module.





From E66 series launch, a Rear Compartment Air Conditioning system (FKA) may be installed as an option.
- Refrigerant Circuit
The compressor output depends on the system with the higher refrigerant requirement. The system with the lower refrigerant requirement is switched cyclically. Both systems are switched cyclically by the shut-off valves in partial load mode. The compressor runs continuously at low output. Both valves are opened and the compressor runs at maximum output at full load.