Monday, 10 March 2014

V24 ENGINE

A V24 engine is a V engine with 24 cylinders, suitable only for very large trucks or locomotives.
Unlike smaller V16 and V20 engines, very few V24s were originally designed with 24 cylinders. The majority of these engines are formed by coupling multiple smaller engines together. For example, a very large V24, the AS.6, engine was built by Fiat in the early 1930s as a powerplant for the competition aeroplane Macchi M.C.72. This engine was in reality formed by mounting two Fiat AS.5 V12s, one behind the other, obtaining a total displacement of over 50 litres (3,051 cu in) and a power output of about 3,100 horsepower (2,310 kW). The two units remained separated (they could be started separately) but the output shaft was shared. Between the units sat the gearbox that was used to reduce the propeller speed, and the final output shaft ran between the cylinder banks of the front engine to reach the nose of the aeroplane.
The Detroit Diesel 24V-71 is an example of a modern, two-stroke V24 Diesel engine. It is capable of producing 1,800 horsepower from a 27.9 liter displacement.


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V18 ENGINE

A V18 engine is a V engine with 18 cylinders. A rare configuration not used in automobiles, large V18 diesel engines have seen limited use in mining, electricity generation, rail transport, and marine propulsion.

Examples of V18 engines

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]
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]
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. Humbolt Bay power station.[5]

Vehicles powered by V18 engines


Name Description Engine
Belaz 75600 haul truck Cummins QSK78
Liebherr T 282B haul truck Cummins QSK78
Komatsu 960E-1 haul truck Komatsu SSDA18V170
MLW M640 diesel-electric locomotive ALCO 18-251