System Description

SYSTEM


FRONT AUTOMATIC AIR CONDITIONING SYSTEM : System Description

- Front automatic air conditioning system is controlled by each function of A/C auto amp., ECM and IPDM E/R.

Control by A/C auto amp.
- Air Flow Control
- Air Inlet Control
- Air Outlet Control
- Compressor Control
- Door Control
- Temperature Control
- Correction for input value of each sensor

Ambient sensor (setting temperature correction)
- A/C auto amp. controls passenger room temperature so that the optimum level always matches the temperature level that passenger may feel. Correction is applied to the target temperature that is set using temperature control dial, according to ambient temperature detected by ambient sensor.

Front in-vehicle sensor [in-vehicle temperature (front side) correction]
- Passenger room temperature (front side) detected by front in-vehicle sensor is corrected for each front air conditioning control (driver side and passenger side)

Intake sensor (intake temperature correction)
- A/C auto amp. performs correction to change recognition intake temperature of A/C auto amp. quickly when difference is large between recognition intake temperature and intake temperature detected by intake temperature sensor. The correction is performed to change recognition intake temperature slowly when difference is small.

Sunload sensor (sunload amount correction)
- Sunload amount detected by sunload sensor is corrected for each air conditioning control (driver side and passenger side).
- A/C auto amp. performs correction to change recognition sunload amount of A/C auto amp. slowly when sunload amount changes quickly, for example when entering or exiting a tunnel.

Control by ECM
- Cooling fan control
System Description.
- Air conditioning cut control. System Description.

Control by IPDM E/R
- Relay control
System Description.
- Cooling fan control
System Description.
- Front A/C control (preset switch) transmits the commands for front automatic air conditioning system operation to AV control unit via communication line, then AV control unit transmits the commands to A/C auto amp. via CAN communication. A/C auto amp. transmits each indication information to AV control unit via CAN communication. AV control unit displays each indication information that is received.