X-DF Excellence Built in - WinGD · PDF WinGD RT-flex50DF IMO Tier III in gas mode Cylinder bore 500mm Piston stroke 2050mm Speed 99–124rpm Mean effective pressure at R1 17.3 bar

“SK AUDACE”, 180,000 CBM LNG carrier with twin WinGD 6-cylinder X62DF engines

Simply a better different

Excellence built in

The global merchant marine industry is in the midst of a revolutionary transformation. Gas as a fuel for merchant shipping has gained considerable interest during the last years, primarily driven by its inherent potential to reduce emissions, and secondarily due to the fact that gas is a sulphur free fuel, with the potential to be readily available at a feasible price. Winterthur Gas & Diesel (WinGD) is a leading developer of low-speed gas and diesel engines for marine propulsion. Its low-pressure X-DF engines are designed to meet emission requirements far below the IMO Tier III limits, utilising a low cost, highly efficient and reliable low pressure gas admission system. In fact, as the only solution that is specifically made for gas, it is designed to run efficiently – at all loads – from port to port.

• The lowest emissions that meet IMO Tier III without additional exhaust gas after-treatment.

• Simple, reliable and most economical low-pressure gas supply system, with the fewest components.

• Stable operation on gas over the entire load for port-to-port operation and manoeuvring.

Key Benefits

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Emission Values %

X-DF engines in gas modeDiesel engines

Excellence built in

Low-pressure X-DF technology: the industry standardThe first gas engines were developed as high pressure gas-diesel engines, based on the well-known diesel combustion process. The breakthrough in the marine market, however, came with the launch of dual-fuel engines using gas admitted at low pressure and ignited by a low volume of liquid fuel pilot.

WinGD has applied a depth of gas engine expertise and experience to its low- speed engines – a move that extends the benefits of DF technology across the broader marine industry.

To date, this technology has been well received and orders have been placed for a variety of vessel types, including large and small LNG Carriers, container feeder vessels and tankers.

The low-pressure X-DF technology conceptLow-pressure X-DF technology is based on the lean-burn principle (Otto cycle), in which fuel and air are premixed and burned at a relatively high air-to-fuel ratio – a concept already used widely on medium-speed engines.

Such a concept on the X-DF engines provides following benefits:

• Low-pressure gas supply means low investment costs and low power consumption

• Pilot fuel quantity below 1% of total heat release

• DF engine can be operated on gas

• Low NOX emissions, IMO Tier III compliant in ECAs without after-treatment

• Particulate matter emissions reduced

Reducing system complexityX-DF technology requires a simple gas supply system, reducing system complexity and auxiliary power consumption. Since the fuel gas is mixed with the scavenge air before

compression, the required gas pressure is below 16 bar at any operating point. As a result, the fuel supply system is relatively simple, reliable and well- proven, ensuring engine efficiency.

ApplicationsX-DF technology is applicable on a variety of vessel types, including LNG carriers, chemical tankers and container ships, and holds excellent potential for vessels operating in Emission Control Areas (Baltic, coasts of North America, Gulf of Mexico). In the marine business, the low-pressure X-DF solution is an increasingly attractive alternative for companies looking for environmentally friendly propulsion solutions.

With a vessel’s lifespan measured in decades, retrofitting an engine to DF operation is often highly cost-effective, since it “future proofs” your investment. The X-DF-ready concept, available on all WinGD X-engines, makes the conversion of low-speed diesel to DF a matter of course – retrofitting can be combined with planned maintenance, during a standard docking period, for example.

Gas admission valve (GAV) Pilot injector

A technical partnership with WinGD and our X-DF engines offers new marine engine standards with low- pressure gas technology. We’re engineering efficiency – improving your operational control, compliance and costs – with new levels of excellence built in.

In an ever-changing world of rising fuel costs and stringent emission targets we are passionate about reducing complexity and helping you meet these challenges.

WinGD 5RT-flex50DF with Turbocharger at the aft end

WinGD 6X72DF engine

Better operational flexibilityThe pre-chamber technology and design for the gas admission valve in our X-DF engines gives you the highest level of combustion stability and reduced emissions, to well below IMO Tier III level.

This reliability in a dual-fuel operation allows for greater load flexibility while improving your port-to-port operations and maneuverability at low speeds, ensuring you have operational control at all times.

Ensured future complianceWinGD offers a better alternative in a world of stringent emission targets. Using benchmark low-pressure technology, you can future-proof your investment and operate safely on all routes with a viable solution to these regulations.

Smokeless operation at all running speeds and an engine idle operation, even in gas mode, keep you compliant with IMO Tier III in ECAs.

This is achieved without additional exhaust gas after treatment system, reducing engineering complexity as well as your gas and particulate matter emissions across the board.

Improved cost efficienciesWinGD develops smarter, efficient engine design with dual-fuel technology in our X-DF engines for low investment costs and lower power consumption.

Featuring the most economic low-pressure supply system and the fewest components, you save on space and fuel costs.

The gas handling and pilot fuel systems keep fuel quantity below 1% of total heat release in the lean burn cycle, which in turn brings additional efficiencies.

Simply a better differentComplex shipping challenges need different thinking. At WinGD, this drives us to set new marine engine standards with low-pressure gas technology in our X-DF engines. We have a hands-on approach and passion for engines to help you focus on the possible.

As a sustainable, long-term global provider, we operate as your agile partner and marine engine specialist to offer simplicity and trusted delivery.

Emission reduction examples – switching to gasThe X-DF principle with gas admission (left) and ignition (right)

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WinGD RT-flex50DF IMO Tier III in gas mode

Cylinder bore 500mmPiston stroke 2050mmSpeed 99–124rpmMean effective pressure at R1 17.3 barStroke/bore 4.10

Rated power, principal dimensions and weights

Cyl.Output in kW at

Length A mm

Length A* mm

Weight tonnes124 rpm 124 rpm 99 rpm 99 rpm

R1 R2 R3 R45 7 200 6 000 5 750 4 775 5 576 6 793 2006 8 640 7 200 6 900 5 730 6 456 7 670 2257 10 080 8 400 8 050 6 685 7 336 2558 11 520 9 600 9 200 7 640 8 216 280

Brake specific consumptions in gas mode

Rating point R1 R2 R3 R4BSEC (energy) kJ/kWh 7 200 7 158 7 200 7 158BSGC (gas) g/kWh 142.7 141.6 142.7 141.6BSPC (pilot fuel) g/kWh 1.5 1.8 1.5 1.8

Brake specific fuel consumption in diesel mode

Rating point R1 R2 R3 R4BSFC (diesel) g/kWh 182.1 182.1 182.1 182.1

WinGD X52DF IMO Tier III in gas mode

Cylinder bore 520 mmPiston stroke 2315 mmSpeed 82–105 rpmMean effective pressure at R1 17.3 barStroke / bore 4.45


Cyl.Output in kW at

Length A mm

Weight tonnes105 rpm 82 rpm

R1 R2 R3 R45 7 450 6 200 5 825 4 850 5 950 2176 8 940 7 440 6 990 5 820 6 900 2517 10 430 8 680 8 155 6 790 7 850 2888 11 920 9 920 9 320 7 760 8 800 323






Cylinder bore 620 mmPiston stroke 2658 mmSpeed 80–103 rpmMean effective pressure at R1 17.3 barStroke / bore 4.29


Cyl.Output in kW at

Length A mm


R1 R2 R3 R45 11 925 9 925 9 250 7 700 7 000 3256 14 310 11 910 11 100 9 240 8 110 3777 16 695 13 895 12 950 10 780 9 215 4358 19 080 15 880 14 800 12 320 10 320 482






Cylinder bore 720 mmPiston stroke 3086 mmSpeed 69-89 rpmMean effective pressure at R1 17.3 barStroke / bore 4.29


Cyl.Output in kW at

Length A mm


R1 R2 R3 R45 16 125 13 425 12 500 10 400 8 085 4816 19 350 16 110 15 000 12 480 9 375 5617 22 575 18 795 17 500 14 560 10 665 6428 25 800 21 480 20 000 16 640 11 960 716








Cyl.Output in kW at

Length A mm


R1 R2 R3 R46 25 920 21 600 20 070 16 710 11 045 8057 30 240 25 200 23 415 19 495 12 550 9108 34 560 28 800 26 760 22 280 14 055 1 0209 38 880 32 400 30 105 25 065 16 500 1 160








Cyl.Output in kW at

Length A mm


R1 R2 R3 R46 31 920 26 580 27 930 23 250 11 630 1 1207 37 240 31 010 32 585 27 125 13 210 1 2608 42 560 35 440 37 240 31 000 16 350 1 4609 47 880 39 870 41 895 34 875 17 850 1 630

10 53 200 44 300 46 550 38 750 19 520 1 79011 58 520 48 730 51 205 42 625 21 280 1 96012 63 840 53 160 55 860 46 500 22 870 2 140





All data provided on this page is for information purposes only, explicitly nonbinding and subject to changes without further notice. WinGD® is a registered trademark.

© Copyright, 2017 Winterthur Gas & Diesel Ltd.

08.2017

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X-DF Excellence Built in - WinGD · PDF WinGD RT-flex50DF IMO Tier III in gas mode Cylinder bore 500mm Piston stroke 2050mm Speed 99–124rpm Mean effective pressure at R1 17.3 bar