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9LW14

Main Engine 4-Stroke · Main Engines (4-Stroke)

Class-certified type (DNV register) · technical data sheet not yet verified
585 kWPower
9Cylinders
140 mmBore
170 mmStroke

The Wärtsilä 9LW14 is a 9‑cylinder, medium‑speed (1800 rpm) four‑stroke trunk piston diesel engine delivering roughly 5.5 MW of propulsion power, noted for its high thermal efficiency and compact power density.

Specifications

Technical data.reference — unverified

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Cylinder power610 kW/cyl (diesel)
Mean effective pressure (BMEP)30 bar
SFOC (diesel)167.7 g/kWh (optimal point)
Weight (8V31)~57.1 tonnes (dry, diesel)
Weight (16V31)~89–92.5 tonnes (dry, diesel)
Piston speed10.75 m/s
TurbochargingTwo-stage turbocharging with intercooling
Fuel injectionCommon rail direct injection
Valve layout2 inlet, 2 exhaust valves per cylinder
Power (kW)585
Speed (rpm)1800
Fuel TypeMDO
ConfigurationL
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