Supercharger: Description and Operation

Supercharger Cooling

COMPONENT LOCATION









INTRODUCTION
The supercharger cooling system cools the pressurized charge air from the supercharger. The supercharger cooling system consists of:
- A charge air coolant pump.
- A charge air radiator.
- Two charge air coolers.
- Connecting hoses and pipes.
The supercharger cooling system is operationally independent of the engine cooling system, but connected to it by a hose installed between the charge air radiator and the radiator of the engine cooling system. The connection with the engine cooling system accommodates thermal expansion and retraction of the coolant in the supercharger cooling system, and enables filling and draining of the supercharger cooling system.

CHARGE AIR COOLANT PUMP









The charge air coolant pump is an electric pump attached to the RH (right-hand) side of the charge air radiator. Hoses connect the inlet of the charge air coolant pump to the charge air radiator, and the outlet to the charge air coolers. An electrical connector provides the interface between the motor of the charge air coolant pump and the vehicle wiring.

CHARGE AIR RADIATOR









The charge air radiator is a cross flow type with an aluminum core and plastic end tanks. The charge air radiator is installed in the cooling module, in front of the A/C (air conditioning) condenser. Brackets on the end tanks attach the charge air radiator to the front of the engine cooling system radiator.
The RH (right-hand) end tank incorporates the coolant inlet and outlet connections, and a connection for the hose to the engine cooling system. Hoses connect the inlet of the charge air radiator to the charge air coolers, and the outlet to the charge air coolant pump.

CHARGE AIR COOLERS
A charge air cooler is installed in each intake manifold. For additional information, refer to Intake Air Distribution and Filtering Intake Air Distribution and Filtering

CONTROL DIAGRAM

NOTE:
A = Hardwired









PRINCIPLES OF OPERATION

Supercharger Cooling Flow Diagram









Electrical power for the charge air coolant pump is supplied from the intercooler water pump relay in the power distribution box. When the intercooler water pump relay is energized, it connects power from the battery, via the BJB (battery junction box) and CJB (central junction box), to the charge air coolant pump. Operation of the intercooler water pump relay is controlled by the ECM (engine control module). The intercooler water pump relay is energized continuously while the ignition is in power mode 6.
When the charge air coolant pump is running, coolant flows from the pump outlet through the charge air coolers, the charge air radiator and back to the pump inlet.