AV18 engine is an eighteen-cylinderpiston engine where two banks of nine cylinders are arranged in aV configuration around a common crankshaft.
The V18 engine is a rare configuration and is primarily used in largediesel engines running at low operating speeds. These large V18 diesel engines have seen limited use inhaul trucks,electricity generation,rail transport, andmarine propulsion.
There are no known automobiles that have used V18 engines and no engine manufacturer has developed or produced a V18 engine for use in automobiles.
While the V18 is a more uncommon engine configuration, there are more common eighteen-cylinder engine configurations such as theW18, which has seen use in both automobiles and aircraft, and theDeltic, an opposed-piston eighteen-cylinder diesel engine created byD. Napier & Son which was used for a variety of applications.
| 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 theV16 QSK60.[2] Marketed byKomatsu 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] |
| PaxmanValenta 18RP200 | 7,230 cu in (118.44 L) | 4,901 hp (3,655 MW) | Diesel | Out of production, used for marine propulsion and power generation.[6] |
TheBelAZ 75600 andLiebherr T 282B haul trucks are powered by theCummins QSK78 engine, while theKomatsu 960E-1 haul truck is powered by theKomatsu SSDA18V170 engine.
In 1971, the Canadian locomotive manufacturerMLW-Worthington produced theMLW M640 prototypediesel-electriclocomotive powered by a 4,000 hp (3.0 MW)ALCO 18-251 engine, however the locomotive did not reach production.