Lightest and most compact heavy duty engine, also used for generating set applications
The Wärtsilä 38 was developed in response to a need in the market for an engine in the 400 mm cylinder bore class. The high level of technology incorporated in this engine, together with its design, and the power plant built around it, are all focused on achieving the lowest possible kWh production cost.
The Wärtsilä 38 has fewer parts, less maintenance requirements, low fuel consumption, reduced emission levels, and has the ability to run reliably on a variety of fuels.
The Wärtsilä 38 engine is fully compliant with the IMO Tier II exhaust emissions regulations set out in Annex VI of the MARPOL 73/78 convention.
|Wärtsilä 38||IMO Tier II|
|Cylinder bore||380 mm||Fuel specification:|
|Piston stroke||475 mm||Fuel oil||700 cSt/50oC|
|Cylinder output||725 kW/cyl||7200 sR1/100oC|
|Speed||600 rpm||ISO 8217, category ISO-F-RMK 700|
|Mean effective pressure||26.9 bar||SFOC 176 g/kWh at ISO condition|
|Piston speed||9.5 m/s|
|Dimensions (mm) and weights (tonnes)|
|6L38||6 345||6 215||2 830||2 830||2 122||3 135||1 115||51|
|8L38||7 960||7 844||2 996||2 972||2 209||3 135||1 115||63|
|9L38||8 560||8 444||2 996||2 972||2 209||3 135||1 115||72|
|12V38||7 461||7 344||3 080||3 080||3 030||2 855||1 435||88|
|16V38||9 018||8 904||3 281||3 281||3 030||2 855||1 435||110|
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 and gas energy consumption
- At ISO standard reference conditions
- Lower calorific value of fuel 42 700 kJ/kg
- Tolerance 5%
- Without engine driven pumps
- Natural gas
- Methane number min. 80
- Lower heating value min. 28 MJ/Nm3
- Gas pressure 5.5 bar
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.
Conditions for use
The 2D and 3D models and drawings downloaded (”Marine Solutions Drawings”) are for general guidance purposes only and should not be used for actual projects. Models and drawings for specific projects must be obtained from the appropriate Wärtsilä personnel as there may be deviations from the Downloadable Files.
File formats supported include DXF and PDF for 2D models and IGES, STEP, DXF, SAT and WRML for 3D models. A 2D DXF or PDF should always be used to support the 3D models. The Downloadable Files are subject to changes or improvements by Wärtsilä without notification so please check regularly for new and updated files at www.wartsila.com.
Wärtsilä takes no responsibility for and disclaims any liability for the contents of the Downloadable Files, including but not limited to omissions, errors, deficiencies, inaccuracies contained therein, and the use or misuse thereof. In no event, shall Wärtsilä be liable for any consequential, special, contingent, or incidental damages or injury, financial or otherwise, suffered by any party arising out of, connected with, or resulting from the use of the Downloadable Files or the information contained therein.
This website contains information, which is owned by or licensed to Wärtsilä. Wärtsilä shall retain all rights, including copyrights, relating to the information in the Downloadable Files. Reproduction or transmission to third parties is prohibited without prior written approval of Wärtsilä. Copyright © Wärtsilä.
Legal and Privacy notice
The largest ship ever built for the Royal Navy is equipped with Wärtsilä Hamworthy Advanced Waste Water System. The prime movers selected for the generating sets are Wärtsilä 38 medium-speed engines. »
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