EMD GP22ECO

EMD GP22ECO

300px KCS #2820 post-rebuild with a "Retro Belle" paint job

Type and origin Power type Diesel-electric Builder Electro-Motive Diesel (EMD)

Specifications AAR wheel arr B-B (UIC: Bo'Bo' ) Gauge 4 ft 8 1⁄2 in (1,435 mm) Prime mover EMD 8–710G3A–T2 Cylinders V8 Transmission Diesel-electric

Performance figures Power output

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, 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.

References

• GP22ECO advertisement by EMD. Retrieved on August 27, 2009
• 710ECO Repower Solutions by EMD. Retrieved on August 27, 2009

External links

• Railroad Picture Archives – Photographs of the EMD GP22ECO.