MANL21/31 series marine diesel engines (1290-1935KW)
High-speed engine products including WP4.1,WP4,WP6,WP7,WD10,WD12,WP10, WP12,WP13,M26,M33, which are mainly used as the main engine and auxiliary engine of the high-speed ships and boats, passenger ship, and fishing boat and inland river transport ship; WHM6160/170 medium speed engine products, which are mainly used as the main engine, electric propeller and auxiliary engine of the bulk cargo carrier, car/passenger ferry, public service ship, offshore support vessel, ocean fishing vessel, engineering ship, multi-purpose ship; CW200/CW250/WH620/WH20/WH25/WH28 medium speed engine products, which are mainly used as the main engine, and auxiliary engine of the engineering ship, passenger ship, fishing boat, and bulk cargo carrier; and MAN series L21/31, L23/30A, L27/38, L32/40 and V32/40 products, which are mainly used as the main engine, electric propeller and auxiliary engine of the bulk cargo carrier, engineering ship, multi-purpose ship, and marine traffic management ship.
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Product Introduction
WEICHAI MAN L21/31 series marine diesel engines are introduced by Weichai and MAN, a world brand of marine diesel engines, through a license production agreement. The engine body of this series of products adopts an overall rigid design with high safety. The cylinder unit is assembled as a whole, which is convenient for loading and unloading. It adopts MAN’s advanced turbocharger and two-stage intercooler. It adopts MAN’s SaCoSone safety control system with high reliability. It can burn MGO, MDO, and HFO and has strong adaptability.
This series of products can be used for ship propulsion main engine and generator set. The products used for propulsion main engine are divided into 6, 7, 8, 9 cylinders, the speed is 1000r/min, the power covers 1290-1935kW, and the minimum fuel consumption is 192g/kW·h. The products used for generator set are divided into 5, 6, 7, 8, 9 cylinders, the speed is 900r/min and 1000r/min, the power covers 1000-1980kW, the minimum fuel consumption is 189g/kW·h. The lubricating oil consumption rate is less than 0.8g/kW·h, which has good power and economy.
Product Parameters
| Type | Four-stroke, water-cooled, in-line, supercharged and intercooled | Number of cylinders | 5/6/7/8/9 |
| Bore/stroke | 210×310mm | Displacement | 53.5/64.2/74.9/85.6/96.3L |
| Minimum fuel consumption | 192g/kW·h | Oil consumption rate | 0.8g/kW·h |
| Startup method | Air start | Idle | 500±50r/min |
| Crankshaft rotation direction (facing the free end) |
Clockwise/Counterclockwise | Emission standards | IMO TIER II, China |
Product spectrum
| Marine main engine | |||||
| model | Number of cylinders | Rated power kW/Ps |
Rated speed r/min |
Dimensions (mm) | Net weight (t) |
| WEICHAI MAN 6L21/31 | 6 | 1290/1755 | 1000 | 4544*1695*3113 | 16.0 |
| WEICHAI MAN 7L21/31 | 7 | 1505/2050 | 1000 | 4899*1695*3267 | 17.5 |
| WEICHAI MAN 8L21/31 | 8 | 1720/2340 | 1000 | 5254*1882*3267 | 19.0 |
| WEICHAI MAN 9L21/31 | 9 | 1935/2630 | 1000 | 5609*1882*3267 | 20.5 |
| Generator Set | ||||||
| model | Number of cylinders | Frequency (Hz) | Speed (r/min) | Unit power (kW) | Dimensions (mm) | Net weight (t) |
| WEICHAI MAN 5L21/31 | 5 | 50/60 | 1000/900 | 950 | 5829*1800*3183 | 22.5 |
| WEICHAI MAN 6L21/31 | 6 | 50/60 | 1000/900 | 1254 | 6314*1800*3183 | 26 |
| WEICHAI MAN 7L21/31 | 7 | 50/60 | 1000/900 | 1463 | 6639*1880*3289 | 29.5 |
| WEICHAI MAN 8L21/31 | 8 | 50/60 | 1000/900 | 1672 | 7682*1880*3289 | 33 |
| WEICHAI MAN 9L21/31 | 9 | 50/60 | 1000/900 | 1881 | 8062*1880*3289 | 36.5 |
Note: Product parameters and models are for reference only. Please contact relevant personnel to obtain official information on fishing vessel models.
Features
- Power: The power coverage is wide, with the main propulsion engine 1290kW-1935kW and the generator set 1000-1980kW.
- Economy: The minimum fuel consumption of the propulsion main engine is 192g/kW·h, the minimum fuel consumption of the generator set is 189g/kW·h, and the lubricating oil consumption rate is less than 0.8g/kW·h.
- Reliability: The unique structural design of the engine and the advanced SaCoSone safety control system produced by MAN ensure trouble-free operation of the engine and a long overhaul period.
- Applicability: The fuel oil has good applicability and can use light diesel oil MGO, marine diesel oil MDO, and heavy fuel oil (HFO) with a viscosity of up to 700cSt/50℃. The boost system matching solution can be provided according to the engine operating conditions.
- Environmental protection: Meets IMO Tier II and China Phase I emission requirements.
MANL21/31 series marine diesel...
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