Two-Stroke Main Engine
AssemblyAn 11-cylinder two-stroke crosshead diesel (950 mm bore, 3,460 mm stroke) delivering up to ~75 MW at about 80 rpm directly to the propeller shaft; the engine alone runs to about 50,000 parts and 2,000+ tonnes. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Two-Stroke Main Engine parts and their functions
10 top-level parts · 2,034 parts in total · full bill of materials below
| # | Part | Qty | What it does |
|---|---|---|---|
| 1 | Bedplate | 1× | Welded and cast lower structure carrying the main bearings; bolted through chocks to the ship double bottom. |
| 2 | Crankshaft | 1× | Semi-built crankshaft of forged throws shrunk onto journals, weighing several hundred tonnes for an 11-cylinder 95-bore engine. |
| 3 | Crosshead | 11× | One per cylinder |
| 4 | Cylinder Assembly 9 parts | 11× | One per cylinder |
| 5 | Turbocharger | 3× | High-efficiency axial turbochargers |
| 6 | Main Bearing | 12× | White-metal main bearings under the crankshaft journals |
| 7 | Scavenge Air System 5 parts | 1× | Scavenge-air receiver, coolers and auxiliary blowers |
| 8 | Fuel Injection System 6 parts | 1× | Common-rail or jerk-pump fuel injection supply |
| 9 | Lubrication System 5 parts | 1× | System and cylinder lubrication |
| 10 | Hydraulic Power Supply 5 parts | 2× | Hydraulic power supply for valve and fuel actuation |
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Bill of materials for Two-Stroke Main Engine
10 top-level lines · 40 rows shown · 2,034 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Bedplate | container-ship-bedplate | 1× | 1 | · | part |
| 2 | Crankshaft | container-ship-crankshaft | 1× | 1 | · | part |
| 3 | Crosshead | container-ship-crosshead | 11× | 11 | · | part |
| 4 | Cylinder Assembly 9 parts | container-ship-cylinder-assembly | 11× | 11 | 137 | assembly |
| 4.1 | Piston | container-ship-piston | 1× | 11 | · | part |
| 4.2 | Piston Rod | container-ship-piston-rod | 1× | 11 | · | part |
| 4.3 | Cylinder Liner | container-ship-cyl-liner | 1× | 11 | · | part |
| 4.4 | Cylinder Cover | container-ship-cyl-cover | 1× | 11 | · | part |
| 4.5 | Exhaust Valve | container-ship-exhaust-valve | 1× | 11 | · | part |
| 4.6 | Fuel Injection Valve | container-ship-fuel-injector | 3× | 33 | · | part |
| 4.7 | Piston-Rod Stuffing Box | container-ship-stuffing-box | 1× | 11 | · | part |
| 4.8 | O-Ring Set | oring-set | 8× | 88 | · | part |
| 4.9 | Fastener Set | fastener-set | 120× | 1,320 | · | part |
| 5 | Turbocharger | container-ship-turbocharger | 3× | 3 | · | part |
| 6 | Main Bearing | container-ship-main-bearing | 12× | 12 | · | part |
| 7 | Scavenge Air System 5 parts | container-ship-scavenge-system | 1× | 1 | 113 | assembly |
| 7.1 | Scavenge Air Cooler | container-ship-scavenge-cooler | 3× | 3 | · | part |
| 7.2 | Auxiliary Blower | container-ship-aux-blower | 2× | 2 | · | part |
| 7.3 | Non-Return Flap | container-ship-nrv | 22× | 22 | · | part |
| 7.4 | Pressure Sensor | pressure-sensor | 6× | 6 | · | part |
| 7.5 | Fastener Set | fastener-set | 80× | 80 | · | part |
| 8 | Fuel Injection System 6 parts | container-ship-fuel-system | 1× | 1 | 178 | assembly |
| 8.1 | Fuel Injection Pump | container-ship-fuel-pump | 11× | 11 | · | part |
| 8.2 | HP Fuel Pipe | container-ship-fuel-pipe | 33× | 33 | · | part |
| 8.3 | Fuel Filter | container-ship-fuel-filter | 4× | 4 | · | part |
| 8.4 | Coolant Pump | coolant-pump | 2× | 2 | · | part |
| 8.5 | Pressure Sensor | pressure-sensor | 8× | 8 | · | part |
| 8.6 | Fastener Set | fastener-set | 120× | 120 | · | part |
| 9 | Lubrication System 5 parts | container-ship-lube-system | 1× | 1 | 88 | assembly |
| 9.1 | Lube-Oil Pump | container-ship-lo-pump | 3× | 3 | · | part |
| 9.2 | Lube-Oil Cooler | container-ship-lo-cooler | 2× | 2 | · | part |
| 9.3 | Cylinder Lubricator | container-ship-cylinder-lubricator | 11× | 11 | · | part |
| 9.4 | Oil Seal | oil-seal | 12× | 12 | · | part |
| 9.5 | Fastener Set | fastener-set | 60× | 60 | · | part |
| 10 | Hydraulic Power Supply 5 parts | container-ship-hps-unit | 2× | 2 | 60 | assembly |
| 10.1 | Servo-Oil Pump | container-ship-hp-pump | 4× | 8 | · | part |
| 10.2 | Hydraulic Accumulator | container-ship-accumulator | 4× | 8 | · | part |
| 10.3 | Relay | relay | 8× | 16 | · | part |
| 10.4 | Pressure Sensor | pressure-sensor | 4× | 8 | · | part |
| 10.5 | Fastener Set | fastener-set | 40× | 80 | · | part |
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Where the two-stroke main engine is used
1 product across 1 domain contain it, directly or inside a sub-assemblyUsed in 1 assembly
Sourcing: possible vendors
Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500–$50k. How estimates work| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| weichai.com ↗ | Weifang, CN | Diesel & power engines | 50 units | 12–16 wks |
| cumminsindia.com ↗ | Pune, IN | Diesel engines | 50 units | 12–16 wks |
|
🇨🇳Yuchai
yuchai.com ↗
|
Yulin, CN | Diesel engines | 50 units | 12–16 wks |
| koel.co.in ↗ | Pune, IN | Diesel & gas engines | 50 units | 12–16 wks |
| ashokleyland.com ↗ | Chennai, IN | Engines & commercial vehicles | 50 units | 12–16 wks |