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From Wikipedia, the free encyclopedia

ALCO 18-251 engine being used as a backup electrical generator at a wastewater plant in Montreal.
ALCO 18-251 engine being used as a backup electrical generator at a wastewater plant in Montreal.

A V18 engine is an eighteen-cylinder piston engine where two banks of nine cylinders are arranged in a V configuration around a common crankshaft.

V18 engines are a rare configuration. Large V18 diesel engines have seen limited use in haul trucks, electricity generation, rail transport, and marine propulsion. There are no known automobiles that have used V18 engines.

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Name Displacement Power output Fuel Notes
ALCO 18-251[1] 12,024 cu in (197.04 l) 4,500 hp (3.36 MW) Diesel Originally designed and manufactured by
American Locomotive Company; now manufactured by
Fairbanks Morse Engine.[1]
Caterpillar 3618 20,320 cu in (333 L) 9,655 hp (7.2 MW) Diesel Out of production
Cummins QSK78[2] 4,735 cu in (77.59 l) 3,500 hp (2.61 MW) Diesel Derived from the V16 QSK60.[2]
Marketed by Komatsu as the SSDA18V170.[3]
Fairbanks Morse Colt-Pielstick PC2.5 63,510 cu in (1,040 L) 11,700 hp (8.73 MW) Diesel In production
MAN V32/44CR 39,055 cu in 643 L 14,483 hp (10.8 MW) Diesel In production
Wärtsilä 18V50DF[4] 125,000 cu in (2,050 l) 23,530 hp (17.55 MW) Diesel or
natural gas
Available for both marine propulsion and power generation, and used in e.g. Humboldt Bay power station.[5]

The BelAZ 75600 and Liebherr T 282B haul trucks are powered by the Cummins QSK78 engine, while the Komatsu 960E-1 haul truck is powered by the Komatsu SSDA18V170 engine.

In 1972, the Canadian locomotive manufacturer MLW-Worthington produced the MLW M640 prototype diesel-electric locomotive powered by the ALCO 18-251 engine, however the locomotive did not reach production.

See also


  1. ^ a b "Power Solutions: 251 Diesel Engines" (PDF). Fairbanks Morse Engine. Retrieved 26 June 2011.
  2. ^ a b "Cummins QSK78". Cummins. Retrieved 25 June 2011.
  3. ^ "New Engine - Rated 3500 horsepower at any altitude". MINExpo Report. Retrieved 26 June 2011.
  4. ^ "Wärtsilä 50DF". Wärtsilä. Retrieved 2 August 2017.
  5. ^ Humboldt Bay, USA Power Plant Wartsila 18V50DF Natural Gas. Industrial Marine Power Forum. Retrieved 2011-10-22.
This page was last edited on 22 April 2022, at 10:38
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