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Light Duty Technology Cost Analysis, Power - US Environmental ...

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D.3.1.4 Transmission Cooling System<br />

D.3.1.4.1 Transaxle Cooling System (Baseline Fusion)<br />

The baseline transaxle (Figure D-26) is cooled by routing the transmission fluid though<br />

an externally mounted heat exchanger. Fluid is forced through the heat exchanger by the<br />

internal transmission pump. The heat exchanger (Figure D-27) is a traditional design<br />

mounted internal to the radiator tank.<br />

Figure D-26: Cooler Lines and Radiator with Internal Cooler<br />

Figure D-27: Internal Cooler<br />

D.3.1.4.2 Transaxle Cooling System (Fusion HEV)<br />

An auxiliary coolant pump is attached in-line on the cooling system for the transmission<br />

control module and DC-DC converter. This pump circulates coolant from the electronics<br />

associated with the hybrid drive and moves it to the exchanger. The exchanger is<br />

mounted external to the radiator ahead of the AC condenser (Figure D-28 and Figure<br />

D-29).<br />

75

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