The EMD 645 is a family of diesel engines built by General Motors Electro-Motive Division for locomotive, marine and stationary engine use. Chronologically the 645 series falls between the earlier 567 series and the later 710 series, but it is still supported by EMD.
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History
The 645 series engine introduced in 1965 was a development of the earlier 567 engine. It had a larger bore, 91⁄16 inches instead of 8½ inches but maintained the same stroke. Engine speed was also increased, from 800/835 to 900 rpm. It was first used in EMD's "40 series" (GP40, SD40) in 3000 hp 16 cylinder form, and in 20 cylinder, 3600 hp form in the SD45. The last locomotives the 645 were installed in were the export models G22CU-2 and G26MC-2 for Taiwan and Indonesia in 2001.
Specification
All 645 engines are 2-stroke 45° V-engines. Each cylinder is of 645 in³ (10.57 l) displacement, hence the name; with a bore of 91⁄16 inches (230.2-mm), a stroke of 10 inches (254-mm) and a compression ratio of 14.5:1. The engines are fitted with either a single or twin Roots blower, or a mechanically assisted Turbocharger depending on required power output
- Rotation (facing rear of engine): Counterclockwise
- Firing order
- 8-cylinder: 1, 5, 3, 7, 4, 8, 2, 6
- 12-cylinder: 1, 12, 7, 4, 3, 10, 9, 5, 2, 11, 8, 6
- 16-cylinder: 1, 8, 9, 16, 3, 6, 11, 14, 4, 5, 12, 13, 2, 7, 10, 15
- 20-cylinder: 1, 19, 8, 11, 5, 18, 7, 15, 2, 17, 10, 12, 3, 20, 6, 13, 4, 16, 9, 14
- Exhaust valves: 4 per cylinder
- Main bearings
- 8-cylinder: 5
- 12-cylinder: 7
- 16-cylinder: 10
- 20-cylinder: 12
- Fuel injection: Unit injector with needle valve
- Engine starting
- AC traction generator: Dual electric starting motors
- DC traction generator: Generator field
- Weight (E3B turbocharged models)
- 8-cylinder: 22050 lb (10.0 tonne)
- 12-cylinder: 28306 lb (12.8 tonne)
- 16-cylinder: 36425 lb (16.5 tonne)
- 20-cylinder: 43091 lb (19.5 tonne)
Versions
| ID | Number of cylinders | Induction | Max rpm | Power (hp) | Power (MW) | Introduced | Locomotive(s) |
|---|---|---|---|---|---|---|---|
| 6-645E | 6 | 900 | 750 | 0.6 | 1967 | G6B | |
| 8-645C | 8 | 1100 | 0.8 | EMD G18AR, NZR DBR class | |||
| 8-645E | 8 | turbocharged | 900 | 1500 | 1.1 | 1982 | GP15T, MP15T |
| 16-645E | 16 | Roots blower | 900 | 2000 | 1.5 | 1966 | GP38, GP38-2, SD38, SD38-2 |
| 8-645E3 | 8 | turbocharged | 900 | 1650 | 1.2 | ||
| 12-645C | 12 | 1650 | 1.2 | EMD G22AR, NZR DC class | |||
| 12-645E3 | 12 | turbocharged | 900 | 2300 | 1.7 | 1968 | GP39, GP39-2, SD39 |
| 16-645E3 | 16 | turbocharged | 900 | 3000 | 2.2 | 1965 | GP40, GP40-2, SD40, SD40A, SD40-2, SD40T-2, SDP40F,ATSF SD26, Australian National BL Class |
| 20-645E3 | 20 | turbocharged | 900 | 3600 | 2.7 | 1965 | SD45, SD45-2, F45, FP45 |
| 16-645E3A | 16 | turbocharged | 950 | 3300 | 2.5 | 1969 | DDA40X (dual engine) |
| 20-645E3A | 20 | turbocharged | 950 | 4200 | 3.1 | 1970 | SD45X |
| 8-645E3B | 8 | turbocharged | 904 | 1514-1666 | 1.1-1.2 | ||
| 12-645E3B | 12 | turbocharged | 904 | 2380-2570 | 1.8-1.9 | JT22CW, V/Line Passenger A Class | |
| 16-645E3B | 16 | turbocharged | 904 | 3195-3390 | 2.4-2.5 | F40C, V/Line Freight G Class (original) | |
| 20-645E3B | 20 | turbocharged | 904 | 3765-3960 | 2.8-3.0 | ||
| 12-645E3C | 12 | turbocharged | 2510 | 1.8 | V/Line Passenger N Class | ||
| 16-645E3C | 16 | turbocharged | 904 | 3300 | 2.5 | British Rail Class 59 | |
| 16-645F | 16 | turbocharged | 3500 | 2.6 | 1977 | GP40X, GP50, SD40X, SD50 | |
| 12-645F3B | 12 | 954 | 2800 | 2.1 | GP49, V/Line Freight G Class (rebuilt) |
See also
References
- Pacific Southwest Railway Museum. The History of EMD Diesel Engines. Retrieved on May 11, 2005.
- John's Alaska Railroad Page. Locomotive roster. Retrieved on September 8, 2006.
- victorianrailways.net [Y class d/e locomotives]. retrieved on October 17, 2006.
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