Page 51: of Maritime Reporter Magazine (October 2015)

Marine Design Annual

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Scania’s new XPI engine with common-rail features 846 kW at 2,300 rpm.

“Patrol craft long” is de? ned as: Intended for inter- mittent use where rated power is available 1 hour in 6 hours period. Between full load operations engine rpm must be reduced at least 10% from maximum ob- tained rpm. Accumulated total service time maximum of 2,000 hrs/year.

Of particular interest for shipping companies and shipyards is the fact that the physical size (footprint) of the complete installation has been decreased, which means that former Scania V8’s can be easily ex- changed.

The turbocharged and after-cooled engine is avail- able as 8-cylinder, in V-90 degrees con? guration, only.

With 130 mm bore and 154 mm stroke it features a displacement of 2.04 liters per cylinder. The mean pis- ton speed is of 11.8 m/s. With the total displacement of 16.32 liters the engine is capable of developing an output of 846 kW (1.150 HP) at 2.300 rpm. With this power increase of 11.5%, compared to the former en- gine, Joel Granath, Vice President Engines, said: “We are now taking one step further away from the compe- tition.”

With these values a power per cylinder of 105.75 kW has been reached, which corresponds to a mean effec- tive pressure of 27.52 bar.

The torque rating of up to 4,150 Nm is particularly high for this output class. This ensures ample perfor- mance even at low revs, while facilitating running at favorable revs in all conditions, including high sea and high load.

Individual cylinder heads with four valves per cyl- inder promotes repairability and fuel economy. Spe- ci? c fuel consumption is according to Scania at its best point of 199 g/kWh and the speci? c oil consumption is 0.15% from fuel consumption. The new DI 16 076M ful? lls the emission standards IMO II, EU Stage IIIA and US Tier 2, Scania said.

The engine is equipped with a Scania developed En- gine Management System, EMS, in order to ensure the control of all aspects related to engine performance.

The 16.4 liter new engine features the company’s own developed and in-house manufactured common-rail

XPI fuel-injection system, which is already used since 2007 in SCANIA’s engines for trucks and industrial applications.

“The XPI system injects more fuel into the cylinders in a shorter time, providing more power,” said Svante

Lejon, senior technical adviser within the company’s

R&D division. “However, this also places higher de- mands on both the ? ltration system and the cleanliness of the fuel, as the system is more sensitive to particles.”

According to Scania, vital for marine installations is that the engine is compact, has easy-to-? t auxiliaries is the world’s #1 and is designed for easy servicing. The companies V8-

Let the Power of the world’s ranked recruiting engines traditionally meet all of these requirements site for the largest maritime Network thanks to the compact vee-design, which reduces the maritime industry.

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overall length. Ancillaries can be ef? ciently accommo-

The Maritime Pofessional family now encompasses print, mo- dated inside the ‘footprint’ of the engine.

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