WinGD extends dual-fuel engine portfolio

The first low-pressure dual-fuel engine for smaller two-stroke vessels, X40DF (Credit: WinGD)
The first low-pressure dual-fuel engine for smaller two-stroke vessels, X40DF (Credit: WinGD)
The WinGD X82-D engine includes higher firing pressures in its combustion chamber than its previous B iteration. (Credit: WinGD)
The WinGD X82-D engine includes higher firing pressures in its combustion chamber than its previous B iteration. (Credit: WinGD)
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WinGD (Winterthur Gas & Diesel) introduced three new two-stroke engines capable of operating on low emission fuels at Nor-Shipping on 4 June.

WinGD, the Winterthur-based engine designer, introduced two 820mm bore designs capable of operating on low emission fuels, the dual-fuel ready X82-D, and the dual fuel X82-DF, as well as a 400mm bore low-speed dual-fuel engine for smaller vessels, the X40-DF.

Both 820mm bore engine designs feature unchanged stroke/bore and stroke characteristics as the preceding B version ensuring they will continue to fit within vessel designs. The two engines offer the same range of cylinders as the preceding B version, offering enhanced propulsion options in the VLCC, VLOC and Panamax container vessel segments.

Both the X82-D and X82-DF vessels have reduced the cylinder distance to 1440mm compared with 1505mm in the X82-B, shortening the overall engine length and weight. All cylinder configurations are possible with a one-piece crankshaft design, which will further reduce the engine length and will feature a two-ring piston concept for reduced friction losses.

The structure of WinGD’s X82-D engine includes higher firing pressures in its combustion chamber than in its previous B iteration. The introduction of higher firing pressure has led to other design changes such as a high-strength aluminium-silicon alloy crankpin bearing and a single wall bedplate.

The engine’s pistons will be fitted with WinGD’s new two-ring model, which employs a gas-tight lock on the top compression ring. WinGD is using galvanic wear-resistant coatings on its piston rings to prolong service life, along with thick chromium layers in its piston ring grooves.

The cylinder liner design features liner wall optimisation, including plateau honing of the liner, as well as a pulse lubrication system, to avoid cold corrosion occurring in the cylinder. The liner wall also features temperature sensors.

The engine’s injection control unit (ICU) has been upgraded to a wear-resistant Mark III version, which has been designed to be easier to service. The common rail unit design has been overhauled, reducing space, and improving functionality and lowering cost.

The commitment to high reliability and prolonged periods between overhauls (TBO) can also be seen in the introduction of the WiCE (WinGD Integrated Control Electronics) engine control system, which will replace the engine designer’s current UNIC system. The system incorporates more resilient cylinder pressure sensors, along with other functionalities supporting prolonged overhaul periods.

The low fuel consumption seen within other engines within WinGD’s X-engine portfolio is also seen in the X82-D. The brake specific fuel consumption (BSFC) has been reduced slightly, although the exact reduction depends on the rating point and tuning variant selected. WinGD gives the example of a VLCC running a 7X82-D at 90% engine power achieving fuel savings of 2.2 tonnes/day.

The X82-D engine will be available from 6 to 9 cylinders, covering a power output from 16,560 kW at 58 rpm to 49,500 kW at 84 rpm.

One final noteworthy feature of the X82-D is that the engine will be supplied as dual-fuel ready. The X82-D and the X82DF engines have been designed as a common platform as far as possible. As such, no major structural components on X82-D engines will need to be modified should a shipowner decide to subsequently convert an engine to X-DF. The X82-D design includes the space reservation for a potential installation of gas system and pilot fuel injection system among other features.

The X82DF shares many of the design concept advances featured in the X82-D, such as the higher firing pressure, the high-strength alloy crankpin as well as WiCE control system and the roll-out of WiCE as standard. One X82DF engine specific advance is the replacement of the standalone GVU with an integrated gas pressure regulation unit (iGPR).

Two-stroke DF engine for smaller vessels

The product launch also included the extension of WinGD’s portfolio to a small 400mm bore low-speed dual-fuel engine, the first low-pressure two-stroke dual-fuel engine for smaller vessels.

The engine is intended to meet growing demand for economical, environmentally friendly engines, from 10-20,000 DWT vessels, such as small tankers or bulkers, feeder containers or LNG bunker vessels.

As the engine is already compliant with all existing emission regulations, including IMO Tier III, the entire support system is reduced due to the absence of the need for any exhaust-gas after-treatment system,

The X40DF, low-pressure, dual-fuel engine is available in 5 to 8 cylinder configuration, covering a power range from 2,775 kW to 7,480 kW, at 104 to 146 rpm.


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