EMD 645

The EMD 645 family of diesel engines was designed and manufactured by the Electro-Motive Division of General Motors. Intended primarily for locomotive, marine and stationary engine use, one 16-cylinder version powered the 33-19 "Titan" prototype haul truck designed by GM's Terex division.

Chronologically, the 645 series falls between the earlier 567 series and the later 710 series. First introduced in 1965, the EMD 645 series is still in production on a by-request basis. The EMD 645 engine series is currently supported by Electro-Motive Diesel, Inc., which purchased the assets of the Electro-Motive Division from General Motors in 2005.

Contents

History

Developed from the earlier 567 series engines, the 645 series engines entered production in 1965. Compared to the 567 series engines bore of eight and one-half inches, the 645 series have a larger bore of nine and one-sixteenth inches while maintaining the same stroke.

The 645 series engines have an engine speed of 900 Revolutions Per Minute compared to the 800/835 RPM of the 567 series.

EMD built an SD40 demonstrator (number 434) in July 1964 to field test the 16-645E3 engine. EMD built another eight SD40 demonstrators (numbers 434A through 434H) and a GP40 demonstrator (number 433A) in 1965. In December 1965 and January 1966 EMD built the first three SD45 demonstrators (numbers 4351 through 4353) to field test the 20-645E3 engine.

When the 645 engine entered production in 1965, it was used in EMD's 40 series (GP40, SD40) in 3,000 horsepower (2,200 kW), sixteen-cylinder form and in the SD45 in 3,600 horsepower (2,700 kW), twenty-cylinder form.

Specification

All 645 engines are two-stroke 45 degree V-engines. Each cylinder is of 645 cubic inches (10.57 liters) displacement, hence the name; with a bore of nine and one-sixteenth inches (230.2 mm), a stroke of ten inches (254 mm) and a compression ratio of 14.5:1. Cylinders in each V-pair are directly opposite each other, necessitating "fork" connecting rods for one bank of cylinders as all rods are always in compression throughout both cycles (competitor General Electric uses "articulated" connecting rods as all rods are alternately in compression or tension throughout the four cycles). The engines are fitted with either a single or twin roots blower, or a mechanically assisted turbocharger, depending on required power output.

Versions

ID Number of cylinders Induction Max rpm Power (hp) Power (MW) Introduced Use
8-645C[1] 8 Roots blower 1100 0.8 EMD G18AR, NZR DBR class
6-645E 6 Roots blower 900 750 0.6 1967 Victorian Railways Y class (G6B)
8-645E 8 Roots blower 900 1000 0.75 1966 SW1000, SW1001, V/Line P class, Victorian Railways T class (3rd series) / H class, CIE 201 Class (rebuilt)
8-645E 8 Turbocharger 900 1500 1.1 1982 GP15T, MP15T
12-645E 12 Roots blower 900 1500 1.1 1968 GM G22 Series, CIE 001 Class (rebuilt)
16-645E 16 Roots blower 900 2000 1.5 1966 GP38, GP38-2, SD38, SD38-2, NSB Di 4, NSWGR 422 Class, Victorian Railways X class (2nd & 3rd series) EMD G26
8-645E3 8 Turbocharger 900 1650 1.2
12-645C 12 Roots blower 1650 1.2 EMD G22AR, NZR DC class
12-645E3 12 Turbocharger 900 2300 1.7 1968 GP39, GP39-2, SD39, CIE 071, EMD GT22,
16-645E3 16 Turbocharger 900 3000 2.2 1965 GP40, GP40-2, GP40P, GP40P-2, GP40TC, SD40, SD40A, SD40-2, SD40T-2, SDP40, SDP40F, F40PH, Australian National BL Class, GT26CW, DSB Class MZ (series I–II)[2]
20-645E3 20 Turbocharger 900 3600 2.7 1965 SD45, SD45-2, F45, FP45, EMD DDM45, DSB Class MZ (series III–IV)[2]
16-645E3A 16 Turbocharger 950 3300 2.5 1969 DDA40X (dual engine), RENFE Class 333
20-645E3A 20 Turbocharger 950 4200 3.1 1970 SD45X
8-645E3B 8 Turbocharger 904 1514-1666 1.1-1.2 Proposed
12-645E3B 12 Turbocharger 904 2380-2570 1.8-1.9 JT22CW, V/Line A class
16-645E3B 16 Turbocharger 904 3195-3390 2.4-2.5 F40C, V/Line G class (original), DSB Class ME[2]
20-645E3B 20 Turbocharger 904 3765-3960 2.8-3.0 SD45T-2
12-645E3C 12 Turbocharger 2510 1.8 V/Line N class
16-645E3C 16 Turbocharger 904 3300 2.5 British Rail Class 59
16-645E4 16 Turbocharger 900 3300 2.46 1973 Terex 33-19 "Titan" haul truck[3]
16-645F 16 Turbocharger 3500 2.6 1977 GP40X, GP50, SD40X, SD50
12-645F3B 12 Turbocharger 954 2800 2.1 GP49, V/Line G class (rebuilt)
16-645F3B 16 Turbocharger 904 3600 2.7 FT36HCW-2-Korail 7000 Series; MPI MPXpress MP36PH-3S and -3C

See also

References

  1. ^ 8-645C engines were 8-567C engines which were updated with 645 "power assemblies"; normally a 645 engine employs an E or F block and their designation is 645E or 645F; the 567 engine has a significantly different oil sump and frame mounting than the later 645 or 710 engine, hence a "645C" engine is a hybrid, possibly rated as a 645 engine, but physically more like an earlier 567 engine
  2. ^ a b c Christensen, Peter; John Poulsen (1999) (in Danish). Motor Materiel 5: Med motor fra GM. bane bøger. p. 100. ISBN 87 88632 79-2. 
  3. ^ "Terex 33-19 Hauler Form No. GMD 1946" (PDF). Canada: Terex Division of General Motors Corporation. 12 1974. p. 1. http://pdfcast.org/pdf/terex-33-19-titan-brochure-gmd-1946. Retrieved 2010-08-30. "Gross HP @ 900 RPM ... 3300" 

External links