Short-stroke 520 and 620mm bore engines unveiled

Cut-away diagram of WinGD's new X52-S2.0 short-stroke engine. (Courtesy of WinGD) Cut-away diagram of WinGD's new X52-S2.0 short-stroke engine. (Courtesy of WinGD)
Industry Database

Upgrading its existing range of diesel two-stroke engines, Winterthur-based engine designer WinGD has announced plans to launch short-stroke engines in the 520mm- and 620mm-bore bore size. The designer is also extending the X-DF range of low-pressure dual-fuel, two-stroke engines, by launching short-stroke DF versions, the X52DF-S1.0 and X62DF-S1.0, respectively.

The main target market for these new engines are container feeder vessels, multipurpose vessels, pure car and truck carriers, ro-ro and con-ro vessels. These vessels all have design conditions, such as shallower draughts, limited propeller diameters and lower main deck heights, that demand a shorter stroke.

“Our new short-stroke engine series offers a tailored solution for smaller vessels that still require the efficiency and power of two-stroke marine engines,” said Volkmar Galke, Global Director, Sales WinGD. “Many of these vessel types are part of an aging fleet that means we expect significant fleet renewal – and a big opportunity for our new engines – over the next few years.”

Rudolf Wettstein, General Manager Marketing and Application, in WinGD’s Sales and Marketing team told The Motorship that the engine designer was “cautiously optimistic” about the likely market reaction to the new engines.

The new engines have lowered their specific fuel oil consumption by 5g/kWh compared with previous engine models, with the X62-S expected to achieve 161g/kWh, while the X52-S will reach 162g/kWh.

The engines also feature a more compact design than previous designs: “the engines are one frame shorter, offering improved payload and profitability for the ship,” Wettstein noted.

The X62-S2.0 The X62-S2.0 engine has a cylinder bore diameter of 620 mm and a piston stroke of 2,245 mm –compared to a stroke of 2,658 mm on the standard X62 – with a maximum continuous power of 2,685 kW/cylinder at 108 rpm. The engine will be available with five to eight cylinders, covering an overall power range of 7,600-21,480 kW at 85-108 rpm.

The X52-S2.0 engine has a cylinder bore diameter of 520 mm and a piston stroke of 2,045 mm, with a maximum continuous power of 1910 kW/cylinder at 120 rpm. The engine will be available with five to eight cylinders, covering an overall power range of 5,425-15,280 kW at 95-120 rpm.

Turning to the dual-fuel variants, the X62DF-S1.0 engine has a maximum continuous power of 2,110 kW/cylinder, for an overall power range of 6,925-16,880 kW.The X52DF-S1.0 engine has a maximum continuous power of 1500 kW/cylinder and covers an overall power range of 4,950-12,000 kW.

The more compact footprint of the new engines is likely to improve WinGD’s competitiveness in market segments where the physical dimensions of its engines had previously counted against it. The reduction in the piston removal height - by 420mm in the X62-S2.0 and X62DF-S1.0 versions - will improve the ease of installation.

As well as making the engines more compact, the new stroke-to-bore ratio also reduces manufacturing and component costs.

The X62-S2.0 and X52-S2.0 engines will also be the first engines in WinGD’s portfolio to include the engine designer’s new integrated Selective Catalytic Reduction (iSCR) solution. The iSCR concept integrates the SCR reactor directly to the exhaust manifold of the engine, before the turbocharger. The compact solution has an integrated reductant injection system and relatively little external piping compared with previous ‘off engine’ solutions.

Rudolf Wettstein said the engine designer planned to subsequently roll out the iSCR solution across the engine designer’s portfolio. “Both the iSCR and the short-stroke series highlight our commitment to simplifying engine installation for shipyards and therefore reducing costs for owners and operators,” said Galke.

The first X62-S engine could be tested by the end of 2021, while the first X52-S is expected to be tested by the middle of 2022.

PRINCIPAL PARTICULARS - X52-S2.0 and X62-S2.0 engine

Type

X52-S2.0

X62-S2.0

Bore

520mm

620mm

Stroke

2,045mm

2,245mm

Stroke/bore ratio

3.93

3.62

Power per cylinder, R1 rating

1,910kW @120rpm

2,685kW@108rpm

Mean effective pressure, R1 rating

22 bar

22 bar

Engine versions, cylinder numbers

5-8

5-8

Power range, 5cyl model

5,425-9,550kW

7,600-13,425kW

Power range, 8cyl model

8,680-15,280kW

12,160-21,480kW

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