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| Illustration 1 | g01520448 |
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(1) Cylinder head
(2) Thermostat housing (3) Shunt tank (4) Vent line (5) Fluid line from the water pump to the shunt tank (6) Bypass for the thermostat (7) Engine radiator (8) Water pump (9) Internal engine oil cooler (10) Inlet port for the power train oil (11) Power train oil cooler (12) Outlet port for the power train oil | |
Power train oil cooler (11) is located on the right side of the engine. Hot power train oil flows through the inner cores of the oil cooler from inlet port (10) to outlet port (12). Water pump (8) draws coolant from engine radiator (7). The coolant exits the back of the pump directly into internal engine oil cooler (9) in the engine. The coolant passes through the core of the oil cooler. The coolant then passes through power train oil cooler (11) and into the internal water manifold of the cylinder block. The manifold disperses the coolant to water jackets around the cylinder walls. The engine coolant provides cooling for the power train oil. After exiting the cooler, some of the cooled power train oil is diverted in order to provide cooling to the rotor of the generator. The remaining oil flows to the electric drive propulsion module. Inside the electric drive propulsion module, the oil provides lubrication and cooling for the planetaries and the brakes. The oil also provides cooling for the motors in the propulsion module.
Reference: See Systems Operation, "Engine Cooling System" in this module for information about engine coolant flow.