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Zibo L250 series LNG/diesel dual-fuel engines are based on L250 series diesel engines as the parent model, fully absorbing advanced domestic and foreign technologies and design ideas. On the basis of maintaining its good power, economy, reliability and other advantages, it designed and developed a medium-speed high-power L250 series LNG/diesel multi-point injection dual-fuel engine suitable for gas areas. The L250 series dual-fuel engine adopts an essential design, and the natural gas supply system is in the state under any circumstances; it adopts domestic quasi-internal hybrid gas electronically controlled multi-point injection technology. The engine can switch the working state according to the actual working conditions, and can use LNG dual fuel or diesel alone. It realizes the ratio of gas and diesel injection through an electronic control unit, so that the engine is always running in a state and saves diesel without affecting the power output. The fuel replacement rate can reach 90%. The common working conditions of ships are mostly low-speed and high-torque. They can meet the needs of low-load filling in dual-fuel mode. Under low-load conditions, 10% of the load point can enter dual-fuel mode, and the replacement rate can reach more than 40%. Full emission indicators
Main technical specifications of L8250 series marine main dual fuel engines
model Model | unit Unit | LB8250ZLC/S LB8250ZLCZ/S LC8250ZLC/S-3 LC8250ZLCZ/S-3 | LB8250ZLC/S-1 LB8250ZLCZ/S-1 LC8250ZLC/S-4 LC8250ZLCZ/S-4 | LB8250ZLC/S-2 LB8250ZLCZ/S-2 LC8250ZLC/S-5 LC8250ZLCZ/S-5 | LB8250ZLC/S-3 LB8250ZLCZ/S-3 LC8250ZLC/S-6 LC8250ZLCZ/S-6 | LB8250ZLC/S-4 LB8250ZLCZ/S-4 LC8250ZLC/S-7 LC8250ZLCZ/S-7 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | ||||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | ||||
| Cylinder bore /Piston stroke | mm | 250/320 | ||||
| Total displacement | L | 125.67 | ||||
| Continuous power/ speed | kW/r/min | 882/600 | 1103/750 | 1177/750 | 1030/700 | 735/650 |
| Overload power/speed | kW/r/min | 970/619 | 1213/774 | 1295/774 | 1133/723 | 809/671 |
| Minimum steady speed under load | r/min | 240 | 300 | 300 | 280 | 260 |
| Mean piston speed | m/s | 6.4 | 8.0 | 8.0 | 7.5 | 6.9 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 1.405/1.527 | 1.405/1.527 | 1.498/1.628 | 1.405/1.527 | 1.080/1.174 |
| Combustion pressure Maximum combustion pressure | MPa | ≤12.0 | ≤12.0 | ≤13.0 | ≤13.0 | ≤11.0 |
| Absolute boosted pressure | MPa | 0.23±0.01 | 0.24±0.01 | 0.24±0.01 | 0.23±0.01 | 0.20±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | ||||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | ||||
| Starting method | / | The air motor starts Air starting | ||||
| Lubrication method | / | Pressure lubrication Pressure | ||||
| Height of lifting cylinder height above crankshaft | mm | 2010 | ||||
| The whole machine quality Net weight | kg | 17900 | ||||
External dimensions (length x width x height) Dimension(L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | ||||
model Model | unit Unit | LB8250ZLC/S-5 LB8250ZLCZ/S-5 LC8250ZLC/S-8 LC8250ZLCZ/S-8 | LB8250ZLC/S-6 LB8250ZLCZ/S-6 LC8250ZLC/S-9 LC8250ZLCZ/S-9 | LB8250ZLC/S-7 LB8250ZLCZ/S-7 LC8250ZLC/S LC8250ZLCZ/S | LB8250ZLC/S-8 LB8250ZLCZ/S-8 LC8250ZLC/S-10 LC8250ZLCZ/S-10 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | |||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | |||
| Cylinder bore /Piston stroke | mm | 250/320 | |||
| Total displacement.. Total displacement | L | 125.67 | |||
| Continuous power/ speed | kW/r/min | 1213/750 | 1324/750 | 1470/750 | 1030/600 |
Overload power/speed Over power/speed | kW/r/min | 1334/774 | 1456/774 | 1617/774 | 1133/619 |
| Minimum steady speed under load | r/min | 300 | 300 | 300 | 240 |
| Mean piston speed | m/s | 8.0 | 8.0 | 8.0 | 6.4 |
| Mean effective pressure/Mean indicated pressure | MPa | 1.544/1.678 | 1.686/1.833 | 1.872/2.035 | 1.639/1.782 |
| Combustion pressure Maximum combustion pressure | MPa | ≤13.0 | ≤13.0 | ≤14.0 | ≤13.0 |
| Absolute boosted pressure | MPa | 0.24±0.01 | 0.26±0.01 | 0.27±0.01 | 0.25±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | |||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | |||
| Starting method | / | The air motor starts Air starting | |||
| Lubrication method | / | Pressure lubrication Pressure | |||
| Height of lifting cylinder height above crankshaft | mm | 2010 | |||
| The whole machine quality Net weight | kg | 17900 | |||
External dimensions (length x width x height) Dimension(L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | |||
model Model | Unit | LC8250ZLC/S-1 LC8250ZLCZ/S-1 | LC8250ZLC/S-2 LC8250ZLCZ/S-2 | LC8250ZLC/S-11 LC8250ZLCZ/S-11 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | ||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | ||
| Cylinder bore /Piston stroke | mm | 250/320 | ||
| Total displacement | L | 125.67 | ||
| Continuous power/ speed | kW/r/min | 1617/825 | 1765/825 | 1617/750 |
| Overload power/speed | kW/r/min | 1779/852 | 1940/852 | 1779/774 |
| Minimum steady speed under load | r/min | 330 | 330 | 300 |
| Mean piston speed | m/s | 8.8 | 8.8 | 8.0 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 1.872/2.035 | 2.043/2.221 | 2.059/2.238 |
| Combustion pressure Maximum combustion pressure | MPa | ≤14.5 | ≤14.5 | ≤14.5 |
| Absolute boosted pressure | MPa | 0.28±0.01 | 0.29±0.01 | 0.28±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | ||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | ||
| Starting method | / | Gas motor starts Air starting | ||
| Lubrication method | / | Pressure lubrication Pressure | ||
| Height of lifting cylinder height above crankshaft | mm | 2010 | ||
| The whole machine quality Net weight | kg | 17900 | ||
External dimensions (length x width x height) Dimension(L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | ||
model Model | unit Unit | LB8250ZLD/S LC8250ZLD/S-3 | LB8250ZLD/S-1 LC8250ZLD/S-1 | LB8250ZLD/S-2 LC8250ZLD/S-2 | LB8250ZLD/S-4 LC8250ZLD/S-4 | LB8250ZLD/S-5 LC8250ZLD/S |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | ||||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | ||||
| Cylinder bore /Piston stroke | mm | 250/320 | ||||
| Total displacement | L | 125.67 | ||||
| Continuous power/ speed | kW/r/min | 1177/750 | 1103/750 | 1103/720 | 1324/750 | 1470/750 |
Overload power/speed Over power/speed | kW/r/min | 1295/750 | 1213/750 | 1213/720 | 1456/750 | 1617/750 |
| Mean piston speed | m/s | 8.0 | 8.0 | 7.7 | 8.0 | 8.0 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 1.498/1.628 | 1.405/1.528 | 1.463/1.590 | 1.686/1.833 | 1.872/2.035 |
| Combustion pressure Maximum combustion pressure | MPa | ≤13.0 | ≤13.0 | ≤13.0 | ≤13.0 | ≤14.0 |
| Absolute boosted pressure | MPa | 0.24±0.01 | 0.24±0.01 | 0.24±0.01 | 0.26±0.01 | 0.27±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | ||||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | ||||
| Rotation/Firing order | / | Viewed from flywheel side turn right clockwise:1-3-5-7-8-6-4-2 | ||||
| Starting method | / | Gas motor starts Air starting | ||||
| Lubrication method | / | Pressure moisturize Pressure | ||||
| Height of lifting cylinder height above crankshaft | mm | 2010 | ||||
| The whole machine quality Net weight | kg | 17900 | ||||
External dimensions (length x width x height) Dimension (L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | ||||
model Model | Unit | LC8250ZLD/S-6 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling |
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder |
| Cylinder bore /Piston stroke | mm | 250/320 |
| Total displacement | L | 125.67 |
| Continuous power/ speed | kW/r/min | 1617/750 |
Overload power/speed Over power/speed | kW/r/min | 1779/750 |
| Mean piston speed | m/s | 8.0 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 2.059/2.238 |
| Combustion pressure Maximum combustion pressure | MPa | ≤14.5 |
| Absolute boosted pressure | MPa | 0.28±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model ) |
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 |
Rotation direction/fire order Rotation/Firing order | / | Viewed from flywheel side turn right clockwise:1-3-5-7-8-6-4-2 |
| Starting method | / | The air motor starts Air starting |
| Lubrication method | / | Pressure lubrication Pressure |
| Height of lifting cylinder height above crankshaft | mm | 2010 |
| The whole machine quality Net weight | kg | 17900 |
External dimensions (length x width x height) Dimension(L×W×H) | mm | 5250×1500×2990 |
Zibo L250 series LNG/diesel dual-fuel engines are based on L250 series diesel engines as the parent model, fully absorbing advanced domestic and foreign technologies and design ideas. On the basis of maintaining its good power, economy, reliability and other advantages, it designed and developed a medium-speed high-power L250 series LNG/diesel multi-point injection dual-fuel engine suitable for gas areas. The L250 series dual-fuel engine adopts an essential design, and the natural gas supply system is in the state under any circumstances; it adopts domestic quasi-internal hybrid gas electronically controlled multi-point injection technology. The engine can switch the working state according to the actual working conditions, and can use LNG dual fuel or diesel alone. It realizes the ratio of gas and diesel injection through an electronic control unit, so that the engine is always running in a state and saves diesel without affecting the power output. The fuel replacement rate can reach 90%. The common working conditions of ships are mostly low-speed and high-torque. They can meet the needs of low-load filling in dual-fuel mode. Under low-load conditions, 10% of the load point can enter dual-fuel mode, and the replacement rate can reach more than 40%. Full emission indicators
Main technical specifications of L8250 series marine main dual fuel engines
model Model | unit Unit | LB8250ZLC/S LB8250ZLCZ/S LC8250ZLC/S-3 LC8250ZLCZ/S-3 | LB8250ZLC/S-1 LB8250ZLCZ/S-1 LC8250ZLC/S-4 LC8250ZLCZ/S-4 | LB8250ZLC/S-2 LB8250ZLCZ/S-2 LC8250ZLC/S-5 LC8250ZLCZ/S-5 | LB8250ZLC/S-3 LB8250ZLCZ/S-3 LC8250ZLC/S-6 LC8250ZLCZ/S-6 | LB8250ZLC/S-4 LB8250ZLCZ/S-4 LC8250ZLC/S-7 LC8250ZLCZ/S-7 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | ||||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | ||||
| Cylinder bore /Piston stroke | mm | 250/320 | ||||
| Total displacement | L | 125.67 | ||||
| Continuous power/ speed | kW/r/min | 882/600 | 1103/750 | 1177/750 | 1030/700 | 735/650 |
| Overload power/speed | kW/r/min | 970/619 | 1213/774 | 1295/774 | 1133/723 | 809/671 |
| Minimum steady speed under load | r/min | 240 | 300 | 300 | 280 | 260 |
| Mean piston speed | m/s | 6.4 | 8.0 | 8.0 | 7.5 | 6.9 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 1.405/1.527 | 1.405/1.527 | 1.498/1.628 | 1.405/1.527 | 1.080/1.174 |
| Combustion pressure Maximum combustion pressure | MPa | ≤12.0 | ≤12.0 | ≤13.0 | ≤13.0 | ≤11.0 |
| Absolute boosted pressure | MPa | 0.23±0.01 | 0.24±0.01 | 0.24±0.01 | 0.23±0.01 | 0.20±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | ||||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | ||||
| Starting method | / | The air motor starts Air starting | ||||
| Lubrication method | / | Pressure lubrication Pressure | ||||
| Height of lifting cylinder height above crankshaft | mm | 2010 | ||||
| The whole machine quality Net weight | kg | 17900 | ||||
External dimensions (length x width x height) Dimension(L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | ||||
model Model | unit Unit | LB8250ZLC/S-5 LB8250ZLCZ/S-5 LC8250ZLC/S-8 LC8250ZLCZ/S-8 | LB8250ZLC/S-6 LB8250ZLCZ/S-6 LC8250ZLC/S-9 LC8250ZLCZ/S-9 | LB8250ZLC/S-7 LB8250ZLCZ/S-7 LC8250ZLC/S LC8250ZLCZ/S | LB8250ZLC/S-8 LB8250ZLCZ/S-8 LC8250ZLC/S-10 LC8250ZLCZ/S-10 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | |||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | |||
| Cylinder bore /Piston stroke | mm | 250/320 | |||
| Total displacement.. Total displacement | L | 125.67 | |||
| Continuous power/ speed | kW/r/min | 1213/750 | 1324/750 | 1470/750 | 1030/600 |
Overload power/speed Over power/speed | kW/r/min | 1334/774 | 1456/774 | 1617/774 | 1133/619 |
| Minimum steady speed under load | r/min | 300 | 300 | 300 | 240 |
| Mean piston speed | m/s | 8.0 | 8.0 | 8.0 | 6.4 |
| Mean effective pressure/Mean indicated pressure | MPa | 1.544/1.678 | 1.686/1.833 | 1.872/2.035 | 1.639/1.782 |
| Combustion pressure Maximum combustion pressure | MPa | ≤13.0 | ≤13.0 | ≤14.0 | ≤13.0 |
| Absolute boosted pressure | MPa | 0.24±0.01 | 0.26±0.01 | 0.27±0.01 | 0.25±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | |||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | |||
| Starting method | / | The air motor starts Air starting | |||
| Lubrication method | / | Pressure lubrication Pressure | |||
| Height of lifting cylinder height above crankshaft | mm | 2010 | |||
| The whole machine quality Net weight | kg | 17900 | |||
External dimensions (length x width x height) Dimension(L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | |||
model Model | Unit | LC8250ZLC/S-1 LC8250ZLCZ/S-1 | LC8250ZLC/S-2 LC8250ZLCZ/S-2 | LC8250ZLC/S-11 LC8250ZLCZ/S-11 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | ||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | ||
| Cylinder bore /Piston stroke | mm | 250/320 | ||
| Total displacement | L | 125.67 | ||
| Continuous power/ speed | kW/r/min | 1617/825 | 1765/825 | 1617/750 |
| Overload power/speed | kW/r/min | 1779/852 | 1940/852 | 1779/774 |
| Minimum steady speed under load | r/min | 330 | 330 | 300 |
| Mean piston speed | m/s | 8.8 | 8.8 | 8.0 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 1.872/2.035 | 2.043/2.221 | 2.059/2.238 |
| Combustion pressure Maximum combustion pressure | MPa | ≤14.5 | ≤14.5 | ≤14.5 |
| Absolute boosted pressure | MPa | 0.28±0.01 | 0.29±0.01 | 0.28±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | ||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | ||
| Starting method | / | Gas motor starts Air starting | ||
| Lubrication method | / | Pressure lubrication Pressure | ||
| Height of lifting cylinder height above crankshaft | mm | 2010 | ||
| The whole machine quality Net weight | kg | 17900 | ||
External dimensions (length x width x height) Dimension(L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | ||
model Model | unit Unit | LB8250ZLD/S LC8250ZLD/S-3 | LB8250ZLD/S-1 LC8250ZLD/S-1 | LB8250ZLD/S-2 LC8250ZLD/S-2 | LB8250ZLD/S-4 LC8250ZLD/S-4 | LB8250ZLD/S-5 LC8250ZLD/S |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling | ||||
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder | ||||
| Cylinder bore /Piston stroke | mm | 250/320 | ||||
| Total displacement | L | 125.67 | ||||
| Continuous power/ speed | kW/r/min | 1177/750 | 1103/750 | 1103/720 | 1324/750 | 1470/750 |
Overload power/speed Over power/speed | kW/r/min | 1295/750 | 1213/750 | 1213/720 | 1456/750 | 1617/750 |
| Mean piston speed | m/s | 8.0 | 8.0 | 7.7 | 8.0 | 8.0 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 1.498/1.628 | 1.405/1.528 | 1.463/1.590 | 1.686/1.833 | 1.872/2.035 |
| Combustion pressure Maximum combustion pressure | MPa | ≤13.0 | ≤13.0 | ≤13.0 | ≤13.0 | ≤14.0 |
| Absolute boosted pressure | MPa | 0.24±0.01 | 0.24±0.01 | 0.24±0.01 | 0.26±0.01 | 0.27±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model) | ||||
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 | ||||
| Rotation/Firing order | / | Viewed from flywheel side turn right clockwise:1-3-5-7-8-6-4-2 | ||||
| Starting method | / | Gas motor starts Air starting | ||||
| Lubrication method | / | Pressure moisturize Pressure | ||||
| Height of lifting cylinder height above crankshaft | mm | 2010 | ||||
| The whole machine quality Net weight | kg | 17900 | ||||
External dimensions (length x width x height) Dimension (L×W×H) | mm | LB8250:5104×1500×2567; LC8250:5250×1500×2990 | ||||
model Model | Unit | LC8250ZLD/S-6 |
Type Type | / | Four-stroke, direct injection, turbocharged, medium cooling four-stroke, direct injection, turbo-charging, inter-cooling |
| Cylinder arrangement/cylinder number | / | Inline/8 cylinder line/8 cylinder |
| Cylinder bore /Piston stroke | mm | 250/320 |
| Total displacement | L | 125.67 |
| Continuous power/ speed | kW/r/min | 1617/750 |
Overload power/speed Over power/speed | kW/r/min | 1779/750 |
| Mean piston speed | m/s | 8.0 |
Average effective pressure/average indicator pressure Mean effective pressure/Mean indicated pressure | MPa | 2.059/2.238 |
| Combustion pressure Maximum combustion pressure | MPa | ≤14.5 |
| Absolute boosted pressure | MPa | 0.28±0.01 |
| Fuel oil consumption rate | g/(kW·h) | 190 (Pure diesel model ) |
| Oil consumption rate Lubrication oil consumption | g/(kW·h) | 0.8 |
Rotation direction/fire order Rotation/Firing order | / | Viewed from flywheel side turn right clockwise:1-3-5-7-8-6-4-2 |
| Starting method | / | The air motor starts Air starting |
| Lubrication method | / | Pressure lubrication Pressure |
| Height of lifting cylinder height above crankshaft | mm | 2010 |
| The whole machine quality Net weight | kg | 17900 |
External dimensions (length x width x height) Dimension(L×W×H) | mm | 5250×1500×2990 |
