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 at the radiator upper hose. 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 LH (left-hand) side of the radiator pack frame. 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 installed in the radiator pack frame, immediately behind the condenser cooling fan.
The coolant inlet and outlet connections of the charge air radiator are installed in the RH (right-hand) and LH (left-hand) end tanks respectively. 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.









OPERATION

Supercharger Cooling Flow Diagram









Electrical power for the charge air coolant pump is supplied from the charge air coolant pump relay in the EJB (engine junction box). When the relay is energized, it connects power from the battery, via the BJB (battery junction box) 2 and EJB (engine junction box), to the charge air coolant pump. Operation of the relay is controlled by the ECM (engine control module). The charge air coolant 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.