Cooling Systems: Notes
WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
DESCRIPTION
The Plug-In Hybrid Electric Vehicle (PHEV) heating and cooling requirements are managed with a combination of three cooling system loops and the vehicles HVAC refrigerant system to provide temperature control of the gas engine, passenger compartment, high voltage battery, power electronics, turbocharger system and transmission cooling systems. The 3 cooling systems are, Engine Coolant Loop (Orange), Battery Coolant Loop (Green), and Low Temperature Coolant Loop (Red).
- The High Temperature Engine Coolant Loop (Orange) consists of a Coolant Heater connected to the high voltage system, and an Electric Coolant Pump in addition to the traditional gasoline engine cooling system. The high temperature engine cooling loop can maintain proper engine temperature when the engine is running as well as provide heat to the passenger compartment when the engine is not operating.
- The Low Temperature Coolant Loop (Red) removes heat generated by the electric drive controls, turbocharger system and also has a heat exchanger to provide transmission cooling.
- The Battery Coolant Loop (Green) obtains heat from the High Voltage Coolant Heater in the Engine Cooling Loop or disperses heat through a chiller valve in the HVAC refrigerant system.
- The HVAC refrigerant system can function when the engine is not operating to remove heat from the passenger compartment and the high voltage battery coolant.