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L250 series LNG/diesel dual fuel engine

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L250 series LNG/diesel dual fuel engine

Zichai L250 series LNG/diesel dual-fuel engine takes the L250 series diesel engine as the parent engine, fully absorbs domestic and foreign advanced technology and design ideas, and is designed and developed on the basis of maintaining its good power, economy, reliability and other advantages. The medium-speed and high-power L250 series LNG/diesel multi-point injection dual-fuel engine is suitable for gas spaces. The L250 series dual-fuel engine adopts an essential design, and the natural gas supply system is in the engine room under any circumstances; it adopts domestic quasi-internally mixed gas electronically controlled multi-point injection technology. The engine can switch working status according to actual working conditions, and can work on LNG dual fuel or diesel alone. It realizes the ratio of gas and diesel injection through the electronic control unit, so that the engine is always running in the best condition 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. The dual fuel mode can meet the low load gas filling demand. Under low load conditions, the 10% load point can enter the dual fuel mode, and the replacement rate can reach more than 40%. Emission indicators are full



Main technical specifications of L8250 series marine main dual-fuel engine


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, intercooled

four-stroke, direct injection,   turbo-charging, inter-cooling

Cylinder arrangement/number of cylinders
Cylinder arrangement/cylinder number
/

Inline/8 cylinder

line/8 cylinder

Bore/stroke
Cylinder bore/Piston stroke
mm250/320
total displacement
Total displacement
L125.67
Continuous power/continuous speed
Continuous power/speed
kW/r/min882/6001103/7501177/7501030/700735/650
Over power/speed Over power/speedkW/r/min970/6191213/7741295/7741133/723809/671
Stable working speed
Minimum steady speed under load
r/min240300300280260
average piston speed
Mean piston speed
m/s6.48.08.07.56.9

Mean effective pressure/mean indicated pressure

Mean effective pressure/Mean indicated pressure

MPa1.405/1.5271.405/1.5271.498/1.6281.405/1.5271.080/1.174
combustion pressure
Maximum combustion pressure
MPa≤12.0≤12.0≤13.0≤13.0≤11.0
boost pressure
Absolute boosted pressure
MPa0.23±0.010.24±0.010.24±0.010.23±0.010.20±0.01
fuel consumption rate
Fuel oil consumption
g/(kW·h)190(Pure diesel model)
Oil consumption rate
Lubrication oil consumption
g/(kW·h)0.8
Starting mode
Starting method
/

Starting from air motor

Air starting

Lubrication method
Lubrication method
/

pressure lubrication

Pressure

Height of hanging cylinder above crankshaft
Height of lifting piston
mm2010
Overall machine quality
Net weight
kg17900

Overall dimensions (length × width × height)

Dimension(L×W×H)

mmLB8250:5104×1500×2567; 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, intercooled

four-stroke, direct injection,   turbo-charging, inter-cooling

Cylinder arrangement/number of cylinders
Cylinder arrangement/cylinder number
/

Inline/8 cylinder

line/8 cylinder

Bore/stroke
Cylinder bore/Piston stroke
mm250/320
Total displacement...
Total displacement
L125.67
Continuous power/continuous speed
Continuous power/speed
kW/r/min1213/7501324/7501470/7501030/600

Overload power/speed

Over power/speed

kW/r/min1334/7741456/7741617/7741133/619
Stable working speed
Minimum steady speed under load
r/min300300300240
average piston speed
Mean piston speed
m/s8.08.08.06.4
Mean effective pressure/Mean indicated pressureMPa1.544/1.6781.686/1.8331.872/2.0351.639/1.782
combustion pressure
Maximum combustion pressure
MPa≤13.0≤13.0≤14.0≤13.0
boost pressure
Absolute boosted pressure
MPa0.24±0.010.26±0.010.27±0.010.25±0.01
fuel consumption rate
Fuel oil consumption
g/(kW·h)190 (Pure diesel model)
Oil consumption rate
Lubrication oil consumption
g/(kW·h)0.8
Starting mode
Starting method
/

Starting from air motor

Air starting

Lubrication method
Lubrication method
/

pressure lubrication

Pressure

Height of hanging cylinder above crankshaft
Height of lifting piston
mm2010
Overall machine quality Net weightkg17900

Overall dimensions (length × width × height)

Dimension(L×W×H)

mmLB8250:5104×1500×2567; LC8250:5250×1500×2990


model

Model

UnitUnitLC8250ZLC/S-1
    LC8250ZLCZ/S-1
LC8250ZLC/S-2
    LC8250ZLCZ/S-2
LC8250ZLC/S-11
    LC8250ZLCZ/S-11

Type

Type

/

Four-stroke, direct injection, turbocharged, intercooled

four-stroke, direct injection,   turbo-charging, inter-cooling

Cylinder arrangement/number of cylinders
Cylinder arrangement/cylinder number
/

Inline/8 cylinder

line/8 cylinder

Bore/stroke
Cylinder bore/Piston stroke
mm250/320
total displacement
Total displacement
L125.67
Continuous power/continuous speed
Continuous power/speed
kW/r/min1617/8251765/8251617/750
Over power/speed Over power/speedkW/r/min1779/8521940/8521779/774
Stable working speed
Minimum steady speed under load
r/min330330300
average piston speed
Mean piston speed
m/s8.88.88.0

Mean effective pressure/mean indicated pressure

Mean effective pressure/Mean indicated pressure

MPa1.872/2.0352.043/2.2212.059/2.238
combustion pressure
Maximum combustion pressure
MPa≤14.5≤14.5≤14.5
boost pressure
Absolute boosted pressure
MPa0.28±0.010.29±0.010.28±0.01
fuel consumption rate
Fuel oil consumption
g/(kW·h)190 (Pure diesel model)
Oil consumption rate
Lubrication oil consumption
g/(kW·h)0.8
Starting mode
Starting method
/

Air motor starting

Air starting

Lubrication method
Lubrication method
/

pressure lubrication

Pressure

Height of hanging cylinder above crankshaft
Height of lifting piston
mm2010
Overall machine quality Net weightkg17900

Overall dimensions (length × width × height)

Dimension(L×W×H)

mmLB8250:5104×1500×2567; 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, intercooled

four-stroke, direct injection,   turbo-charging, inter-cooling

Cylinder arrangement/number of cylinders
Cylinder arrangement/cylinder number
/

Inline/8 cylinder

line/8 cylinder

Bore/stroke
Cylinder bore/Piston stroke
mm250/320
total displacement
Total displacement
L125.67
Continuous power/continuous speed
Continuous power/speed
kW/r/min1177/7501103/7501103/7201324/7501470/750

Overload power/speed

Over power/speed

kW/r/min1295/7501213/7501213/7201456/7501617/750
average piston speed
Mean piston speed
m/s8.08.07.78.08.0

Mean effective pressure/mean indicated pressure

Mean effective pressure/Mean indicated pressure

MPa1.498/1.6281.405/1.5281.463/1.5901.686/1.8331.872/2.035
combustion pressure
Maximum combustion pressure
MPa≤13.0≤13.0≤13.0≤13.0≤14.0
boost pressure
Absolute boosted pressure
MPa0.24±0.010.24±0.010.24±0.010.26±0.010.27±0.01
fuel consumption rate
Fuel oil consumption
g/(kW·h)190(Pure diesel model)
Oil consumption rate
Lubrication oil consumption
g/(kW·h)0.8
Rotation/Firing order Rotation/Firing order/

viewed from flywheel side     Turn right clockwise:1-3-5-7-8-6-4-2

Starting mode
Starting method
/

Air motor starting

Air starting

Lubrication method
Lubrication method
/

Pressure moisturizing

Pressure

Height of hanging cylinder above crankshaft
Height of lifting piston
mm2010
Overall machine quality
Net weight
kg17900

Overall dimensions (length × width × height)

Dimension (L×W×H)

mmLB8250:5104×1500×2567; LC8250:5250×1500×2990


model  

Model

UnitUnitLC8250ZLD/S-6

Type  

Type

/

Four-stroke, direct injection, turbocharged, intercooled

four-stroke,   direct injection, turbo-charging, inter-cooling

Cylinder arrangement/number of cylinders
Cylinder arrangement/cylinder number
/

Inline/8   缸

line/8 cylinder

Bore/stroke
Cylinder bore/Piston stroke
mm250/320
total displacement
Total displacement
L125.67
Continuous power/continuous speed
Continuous power/speed
kW/r/min1617/750

Overload power/speed

Over power/speed

kW/r/min1779/750
average piston speed
Mean piston speed
m/s8.0

Mean effective pressure/mean indicated pressure

Mean effective pressure/Mean indicated pressure

MPa2.059/2.238
combustion pressure
Maximum combustion pressure
MPa≤14.5
boost pressure
Absolute boosted pressure
MPa0.28±0.01
fuel consumption rate
Fuel oil consumption
g/(kW·h)190(Pure diesel mode   Pure diesel model)
Oil consumption rate
Lubrication oil consumption
g/(kW·h)0.8

Rotation direction/firing order

Rotation/Firing order

/Viewed from the flywheel end   viewed from flywheel side     Turn right   clockwise:1-3-5-7-8-6-4-2
Starting mode
Starting method
/

Starting from air motor

Air starting

Lubrication method
Lubrication method
/

pressure lubrication

Pressure

Height of hanging cylinder above crankshaft
Height of lifting piston
mm2010
Overall machine quality
Net weight
kg17900

Overall dimensions (length × width × height)

Dimension(L×W×H)

mm5250×1500×2990




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