Wärtsilä 46F
Best-in-class fuel economy & outstanding power-to-weight as well as power-to-space ratios
The technologically advanced Wärtsilä 46F can be run on either heavy fuel oil (HFO), marine diesel oil (MDO), or on light diesel when being operated within strict coastal or port emissions areas. This fuel switching can take place smoothly and without power interruption across all engine loads.
This flexibility enables the operator to select the fuel according to price, availability, and the need to meet local emissions regulations.
The Wärtsilä 46F engine is fully compliant with the IMO Tier II exhaust emissions regulations set out in Annex VI of the MARPOL 73/78 convention.
| Wärtsilä 46F | IMO Tier II | ||
|---|---|---|---|
| Cylinder bore | 460 mm | Fuel specification: | |
| Piston stroke | 580 mm | Fuel oil | 700 cSt/50oC |
| Cylinder output | 1200 kW/cyl | 7200 sR1/1000 F | |
| Speed | 600 rpm | ISO 8217, category ISO-F-RMK 700 | |
| Mean effective pressure | 24.9 bar | L engine SFOC 171 g/kWh at ISO condition | |
| Piston speed | 11.6 m/s | V engine SFOC 170 g/kWh at ISO condition | |
| Option: Lubricating oil module integrated on engine. | |||
| Rated power | |
|---|---|
| Engine type | kW |
| 6L46F | 7 200 |
| 7L46F | 8 400 |
| 8L46F | 9 600 |
| 9L46F | 10 800 |
| 12V46F | 14 400 |
| 14V46F | 16 800 |
| 16V46F | 19 200 |
| Dimensions (mm) and weights (tonnes) | |||||||
|---|---|---|---|---|---|---|---|
| Engine type | A | A | B | C | D | F | Weight |
| 6L46F | 8 430 | 8 620 | 3 500 | 2 930 | 3 750 | 1 430 | 97 |
| 7L46F | 9 260 | 9 440 | 3 800 | 2 950 | 3 750 | 1 430 | 113 |
| 8L46F | 10 080 | 10 260 | 3 800 | 2 950 | 3 750 | 1 430 | 124 |
| 9L46F | 10 900 | 11 080 | 3 800 | 2 950 | 3 750 | 1 430 | 140 |
| 12V46F | 10 080 | 10 150 | 3 820 | 4 050 | 3 800 | 1 620 | 173 |
| 14V46F | 11 650 | 11 729 | 4 243 | 4 678 | 3 800 | 1 620 | 216 |
| 16V46F | 12 700 | 12 779 | 4 243 | 4 678 | 3 800 | 1 620 | 233 |
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Engine dimensions
A - Total length of the engine when the turbocharger is located at the flywheel end.
A - Total length of the engine when the turbocharger is located at the free end.
B - Height from the crankshaft centreline to the highest point.
B - Height from the crankshaft centreline to the highest point when the turbocharger is located at the flywheel end.
C - Total width of the engine.
C - Total width of the engine when the turbocharger is located at the flywheel end.
D - Minimum height from the crankshaft centreline when removing a piston.
F - Distance from the crankshaft centreline to the bottom of the oil sump.
Dimensions and weights
- Dimensions are in millimetres and weights are in metric tonnes. Indicated values are for guidance only and are not binding.
- Cylinder configurations: L = in-line and V = v-form.
Specific fuel oil consumption
At ISO standard reference conditions
Lower calorific value of fuel 42 700 kJ/kg
Tolerance 5%
Without engine driven pumps
At 85% load
ISO standard reference conditions
Total barometric pressure: 1.0 bar
Suction air temperature: 25 °C
Charge air, or scavenge air, cooling water temperature: 25 °C
Relative humidity: 30%
Wärtsilä engines are delivered with the UNIC embedded engine management system.
The UNIC system is designed to ensure extended lifetime for large marine diesel and gas engines operating in the toughest of conditions. Special attention has been paid to temperature- and vibration endurance throughout the design, while the highest priority has been given to operational reliability.
Key features of the UNIC system include the engine safety system, local monitoring, speed control with loadsharing, fuel injection- and timing control, knock detection, alarm signal acquisition, start/stop sequencing, load reduction request, system diagnostics, and a fieldbus interface as applicable for each engine configuration.
Thanks to the electronic control, the engine can be adapted to different operating conditions. Furthermore, the pre-tested configuration allows the engine or generating set to be made ready for operation with a minimum of commissioning and installation work.
