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Wartsila-O-E-W-38-TR - 12 Pages

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Catalogue excerpts

The MSC Musica cruise vessel is equipped with five Wärtsilä 16V38 engines. The Fesco Sakhalin Ice-breaking Supply and Standby Vessel is equipped with three Wärtsilä 8L38 engines The trailing suction hopper dredger Prins der Nederlanden of Westminster Dredging Co. Ltd, a 100% subsidiary of Royal Boskalis Westminster nv, is equipped with two Wärtsilä 12V38 engines and one Wärtsilä 9L20 engine. The tanker Bitflower is equipped with a Wärtsilä 6L38 engine. DESIGN PHILOSOPHY The Wärtsilä 38 was developed in response to a need in the market for an engine in the 400 mm cylinder bore class. The Wärtsilä...

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LOW NOX COMBUSTION The Yacht Express yacht carrier is equipped with two Wärtsilä 12V38 Common Rail engines. The best trade-off between low NOX emissions and low specific fuel consumption (SFC) is obtained by using a low-NOX combustion system. This combines Miller timing and high compression ratio with a fast, controlled heat release that is ensured by an optimized fuel injection and combustion process. Other important contributing factors are high injection pressures and a well designed combustion chamber. Gas exchange losses are minimized by optimized inlet and exhaust channels in the cylinder...

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ENGINE BLOCK The combination of design elements such as underslung crankshaft, integrated air receivers and jacket water manifold, short cylinder distances and material choice has resulted in a very rigid engine block. The camshaft bearing environment forms an integrated part of the engine block, contributing to the overall stiffness of the block. The rigidity of the engine block ensures easy flexible mounting. CRANKSHAFT Special attention was given in the design of the Wärtsilä 38 engine to optimizing the various geometric properties such as cylinder distance and high combustion pressure in order...

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CAMSHAFT The camshaft consists of individual onecylinder camshaft units which are flange connected to separate bearing journals. Built-in valve tappet modules screwed onto the engine block allows for easy maintenance and reliable operation. The overall design ensures reliable operation, easy maintenance and inspection. CYLINDER HEAD The cylinder head has been redesigned to maximize thermal efficiency by incorporating the largest possible air/gas channels. It is also adapted to the higher load of the Wärtsilä 38 engine. The use of four cylinder head studs facilitates easy maintenance. The valve...

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PISTON AND PISTON RINGS The piston design consists of a steel crown, nodular cast iron skirt and pressurized skirt lubrication. The three-ring pack consists of two compression rings and one oil scraper ring located at the crown. This ring pack ensures optimal pressure distribution and lowers lubricating oil consumption. The shape of the combustion chamber is such that it ensures efficient combustion at all loads, while the component temperatures are kept low. FUEL SYSTEM The fuel feed and return lines are integrated in the fuel pump housing. This offers a ‘clean’ cylinder head environment for...

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• Support of the exhaust system (rigid mounted isolation box and single pipe exhaust [SPEX]) • Support of the cooling water return channel from the engine. This multifunctional solution allows a compact installation. The exhaust system contributes to the efficiency of the turbochargers thanks to its flow-optimized design. The system is modular for easy assembly and can handle such factors as gas exchange dynamics, high temperatures and thermal expansion, etc. Insulation of the exhaust system is achieved by stainless steel insulating panels, which are easily removable for inspection access. ‘HOT...

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The Wärtsilä 38 assembly hall in Trieste, Italy. AUTOMATION The engine is equipped with a scaleable engine automation system: • The basic version (UNIC C1) consists of a hardwired system containing sensors, switches and handles the basic engine safeties. • The extended automation system (UNIC C2) is a complete electronic engine control system. • In case of common-rail fuel injection system (UNIC C3) automation system is applied taking care of the fuel injection. The systems differ in the way signals are handled and in the amount of functionality covered by the system. All systems include all start...

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WÄRTSILÄ 38 MAIN TECHNICAL DATA MARINE ENGINES Cylinder bore Piston stroke Cylinder output Engine speed Mean effective pressure Piston speed Fuel specification: Fuel oil 380 mm 475 mm 725 kW/cyl 600 rpm 26.9 bar 9.5 m/s 730 cSt/50°C 7200 sR1/100°F ISO 8217:2005 (E), category ISO-F-RMK 700 SFOC 173-175 g/kWh at ISO condition MAXIMUM CONTINUOUS OUTPUT Engine 6L38 8L38 9L38 12V38 16V38 Diesel Electric [kW] 4350 5800 6525 8700 11600 CPP [kW] 4350 5800 6525 8700 11600 FPP [kW] 4050 5400 6075 8100 10800 IN-LINE ENGINES DIMENSIONS Engine A* [mm] A [mm] B* [mm] B [mm] 6L38 6345 6220 2830 2830 8L38 9L38...

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with complete lifecycle power solutions. When creating better and environmentally compatible technologies, Wärtsilä focuses on the marine and energy markets with products and solutions as well as services. Through innovative products and services, Wärtsilä sets out to be the most valued business partner of all its customers. This is achieved by the dedication of over 18,000 professionals manning 160 locations in 70 countries around the world. Wärtsilä is listed on the Nordic Exchange in Helsinki, Finland. WÄRTSILÄ® is a registered trademark. Copyright © 2009 Wärtsilä Corporation. 01.2009 / Bock´s...

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