FUEL savings and lower emissions are promised by the use of an auxiliary power unit on large American diesel locos. A prototype APU was demonstrated by CSX Transportation on August 9. The diesel-fuelled APU automatically shuts down the main locomotive engine when the train is stopped, but provides power to operate all vital equipment, including cab heating and air-conditioning, and keeps engine fluids at the correct temperature.

CSX and International Road & Rail have formed EcoTrans Technologies, a joint venture company based in Florida, to sell the technology to other operators.

Nitrous oxide emissions are cut by 92%, to meet the US Environmental Protection Agency tier 0 limits due to be introduced on January 1. CSX estimates use of the APU will save 30000 litres of fuel per locomotive per year.

EcoTrans Technologies, USA

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