PRODUCT INFORMATION
INDEX
DATE
Dep.2
IC-C-D-40-001e C
November 2015
EMISSION UNITS CONVERSION
3/3
1.3. ISO Cycles
On many occasions (e.g. Marine engines), emissions are calculated by taking measurements under various
operating conditions of the engine and applying weighting factors for each checkpoint. Legislations specify which
cycle must be applied to calculate the emissions. These are the most common cycles:
-
C1
Cycle
Speed
Rated Speed
Intermediate Speed
Idling
Torque (%)
100
75
50
10
100
75
50
0
Weighting Factor
0.15
0.15
0.15 0.1 0.1 0.1 0.1 0.15
-
D1
Cycle
Speed Rated
Speed
Torque (%)
100
75
50
Weighting Factor
0.3
0.5
0.2
-
D2
Cycle
Speed Rated
Speed
Torque
(%)
100 75 50 25 10
Weighting Factor
0.05
0.25
0.3
0.3
0.1
-
E2
Cycle
Speed Rated
Speed
Torque
(%)
100 75 50 25
Weighting Factor
0.2
0.5
0.15
0.15
-
E3
Cycle
Speed
(%)
100 91 80 63
Torque
(%)
100 75 50 25
Weighting Factor
0.2
0.5
0.15
0.15
-
E5
Cycle
Speed
(%)
100 91 80 63
Idling
Torque
(%)
100 75 50 25 0
Weighting Factor
0.08
0.13 0.17 0.32 0.3
Formula for the specific emissions calculation:
Emissions =
∑
∑
Where q
m gas i
is the pollutant flow (g/h) as 1.2 paragraph formula, P
i
is the power and W
i
is the weighting factor
4.1.47
O&M_2.002211.810_A_10_2016
