3.2.1 For every individual engine or parent engine
of an engine group or family, one of the test cycles specified in
3.2.2 to 3.2.6 shall be applied for verification of compliance with
the NOx emission limits in accordance with regulation 13 of Annex VI.
3.2.2 For constant-speed marine engines for ship
main propulsion, including diesel-electric drive, test cycle E2 shall
be applied in accordance with table 1.
Table 1 Test cycle for
"Constant-speed main propulsion" application (including diesel electric drive and
variable pitch propeller installations)
|
Test cycle type E2
|
Speed
|
100%
|
100%
|
100%
|
100%
|
| Power
|
100%
|
75%
|
50%
|
25%
|
| Weighting
factor
|
0.2
|
0.5
|
0.15
|
0.15
|
3.2.3 For variable-pitch propeller sets, test
cycle E2 shall be applied in accordance with table
1.
3.2.4 For propeller-law-operated main and propeller-law-operated
auxiliary engines, test cycle E3 shall be applied in accordance with table 2.
Table 2 Test cycle for
"Propeller-law-operated main and propeller law operated auxiliary engine"
application
|
Test cycle type E3
|
Speed
|
100%
|
91%
|
80%
|
63%
|
| Power
|
100%
|
75%
|
50%
|
25%
|
| Weighting
factor
|
0.2
|
0.5
|
0.15
|
0.15
|
3.2.5 For constant-speed auxiliary engines, test
cycle D2 shall be applied in accordance with table
3.
Table 3 Test cycle for "Constant
speed auxiliary engine" application
|
Test cycle type D2
|
Speed
|
100%
|
100%
|
100%
|
100%
|
100%
|
| Power
|
100%
|
75%
|
50%
|
25%
|
10%
|
| Weighting
factor
|
0.05
|
0.25
|
0.3
|
0.3
|
0.1
|
3.2.6 For variable-speed, variable-load auxiliary
engines, not included above, test cycle C1 shall be applied in accordance
with table 4.
Table 4 Test cycle for
"Variable-speed, variable-load auxiliary engine" application
|
Test cycle type C1
|
Speed
|
Rated
|
Intermediate
|
Idle
|
| 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
|
3.2.7 The torque figures given in test cycle C1
are percentage values which represent for a given test mode the ratio
of the required torque to the maximum possible torque at this given
speed.
3.2.8 The intermediate speed for test cycle C1
shall be declared by the manufacturer, taking into account the following
requirements:
-
.1 For engines which are designed to operate over
a speed range on a full load torque curve, the intermediate speed
shall be the declared maximum torque speed if it occurs between 60%
and 75% of rated speed.
-
.2 If the declared maximum torque speed is less
than 60% of rated speed, then the intermediate speed shall be 60%
of the rated speed.
-
.3 If the declared maximum torque speed is greater
than 75% of the rated speed, then the intermediate speed shall be
75% of rated speed.
-
.4 For engines which are not designed to operate
over a speed range on the full load torque curve at steady-state conditions,
the intermediate speed will typically be between 60% and 70% of the
maximum rated speed.
3.2.9 If an engine manufacturer applies for a
new test cycle application on an engine already certified under a
different test cycle specified in 3.2.2 to 3.2.6, then it may not
be necessary for that engine to undergo the full certification process
for the new application. In this case, the engine manufacturer may
demonstrate compliance by recalculation, by applying the measurement
results from the specific modes of the first certification test to
the calculation of the total weighted emissions for the new test cycle
application, using the corresponding weighting factors from the new
test cycle.