Cooling System Control System Description

SYSTEM

COOLING SYSTEM CONTROL : System Description


SYSTEM DIAGRAM







HPCM INPUT/OUTPUT SIGNAL ITEMS

Input Signal Item





Output Signal Item






SYSTEM DESCRIPTION

Based on the request signals from the control modules, HPCM cools the engine, traction motor inverter (traction motor), and DC/DC converter.

COOLING FAN CONTROL

Based on the request signals from the ECM and traction motor inverter, HPCM transmits the cooling fan control signal to IPDM E/R via CAN communication. IPDM E/R transmits the pulse duty signal that corresponds to the received signal to the cooling fan control module. The cooling fan control module controls the duty of the fan motor drive voltage in order to control the speed of the cooling fan motor.
Cooling Fan Control.

DC/DC CONVERTER COOLING CONTROL

If deterioration of the DC/DC converter cooling performance causes the temperature to rise, the Li-ion battery controller transmits the DC/DC converter cooling mode request signal to HPCM. When HPCM receives the signal, it transmits the DC/DC converter cooling mode signal to A/C auto amp. via CAN communication. When the A/C auto amp. receives the signal, it introduces outside air to lower the temperature of the DC/DC converter.
Air Flow Control.

ELECTRIC WATER PUMP CONTROL

When vehicle is READY, HPCM transmits the activation signal to the electric water pump, activating the pump.
It also performs duty control of the drive voltage according to the vehicle conditions, in order to control the operation of the electric water pump and reduce operating noise.
High Voltage Cooling System.