Gas Engine L6 (Deutz)

S/N

Model

Items

ND68D6.8

1

Rated power (kW) *①

68

2

Rated speed (r/min)

1500/1800

3

Quantity of gas cylinder

6

4

Type

4-stroke, water cooling, in line

5

Bore / stroke (mm)

105/130

6

Total displacement (L)

6.75

7

Mean piston speed (m/s)

6.5/7.8

8

Compression ratio

11.3

9

Max. explosion pressure (MPa)

≤6

10

Air intake type

Natural aspiration

11

Mean effective pressure (MPa)

0.71/0.592

12

Valve clearance (cold state) (mm)

Inlet valve: 0.2, exhaust valve: 0.3

13

Starting method

Electric

14

Firing order

1-5-3-6-2-4

15

Wet lube oil sump capacity (L)

14

16

Cooling method

Water cooling

17

Lube oil pressure (MPa)

0.30～0.60

18

Rotation direction of crankshaft

Counterclockwise (View From Flywheel)

19

Exhaust temperature (℃)

Manifold pipe: ≤560

Main pipe: ≤580

20

Gas type

Coal-bed gas(Methane gas)、Biogas、Natural gas

21

Lube oil type      

15W40-CF Or Shell CD-0480 special lube oil for gas engine

22

Specific fuel consumption (MJ/kW.h)

≤11MJ/kW.h (pipeline natural gas)

23

Specific lube oil consumption (g/kW.h)

≤0.8

24

Advanced angle of gas ignition system (crank angle)          

23°

25

Volume of cooling water in gas cylinder    (L)

9

26

Capacity of expansion tank (L)        

28

27

Net weight (kg)

580

Note: *① Rated output is subject to the standard conditions (GB/T 6072.1-2000) of 100kPa atmospheric pressure, 25℃ ambient temperature, 25℃ charge water temperature in intercooler. If the actual condition differs from the standard one, it should be revised.