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The EMD GP22ECO is a B-B diesel-electric locomotive rebuilt by Electro-Motive Diesel. Initially EMD built two GP22ECO demonstrators, one based on a GP9 and one based on a GP40,〔''Trains'' Magazine, July 2008, p. 24〕 but thus far all orders have been for conversions based on EMD GP40 and EMD GP40-2 series locomotives. The rebuild involves replacing the existing prime mover with an EPA Tier-II-compliant turbocharged V8 710G3A, with Electronic fuel injection. The prime mover is mated to an AR10 alternator for traction power, a CA6 alternator for control power, and a computerized control system. Applying this to a 6-axle locomotive, results in a SD22ECO. Some 6-axle locomotives could alternately be converted into a SD32ECO, using a V12 instead. When applied to GP40 or GP40-2 series locomotives this conversion does not alter the external appearance of the locomotive, although the conversion of the GP9-based demonstrator required extensive changes to the long hood. The GP22ECO offers customers a 'factory' upgrade of existing locomotives. ==Advertised benefits== Advertised benefits include: * EPA Tier-II compliance. * Fuel savings up to 25%. * Lube oil savings up to 50%. * Upgradeable software can be tuned for reduced emissions or improved fuel efficiency. * Microprocessor control offers diagnostics, wheel slip control, and optimal wheel/rail adhesion. * 184-day maintenance cycle instead of 92-day. * 15,000 MWh overhaul cycle. * Reduced maintenance expense due to use of standard 710 prime mover. * Automatic Engine Start Stop system keeps locomotive ready without wasting fuel. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「EMD GP22ECO」の詳細全文を読む スポンサード リンク
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