EMD 265
EMD 265, or the H-Engine, (introduced in 1995[1]) is a line of diesel engines built by Electro-Motive Diesel (EMD) for use in locomotives. Unlike EMD's previous 567, 645, and 710 lines of engines, which operate under a two-stroke cycle, the H-Engine operates as a four-stroke engine. Also distinguishing it from EMD's other engines is the notation used in its naming. In the 567, 645, and 710 engines the number refers to the displacement of each cylinder in cubic inches, while the H-Engine's "265" designation refers to the bore of the cylinder in millimeters.
Specifications
Although other variations of the H-Engine exist (including a 12-cylinder version), the following are the specifications for the 16-265H:[2]
- 16 cylinders in a V configuration
- Up to 6,300 bhp (4,700 kW) at 1000 rpm (eq. 33,000+ ftlbs torque)
- 265 mm (10.4 in) bore
- 300 mm (11.8 in) stroke
- 1,010 cubic inches (16,600 cm3) displacement per cylinder[1]
- Twin turbochargers
Usage in locomotives
Usage in locomotives includes the EMD SD90MAC,[1] the unique prototype EMD SD89MAC (currently stored), and the China-only EMD JT56ACe. The SD90MAC series was constructed in the 1990s for Union Pacific and Canadian Pacific; generally considered unsuccessful due to reliability issues with the 265H engine, all 265H-powered versions in North America have been sold to lessors or scrapped.
Versions
| ID | Number of cylinders | Induction | Max rpm | Power (hp) | Power (MW) | Introduced | Locomotive(s) |
|---|---|---|---|---|---|---|---|
| 12-265H | 12 | Turbocharger | 1000 | 4,725 | 3.52 | 1995 | EMD SD89MAC |
| 16-265H | 16 | Turbocharger | 1000 | 6,300 | 4.7 | 1995 | EMD SD90MAC, EMD JT56ACe (China Railways HXN3) |