6.2.1.1 Engines that meet the following conditions
shall be eligible for an engine parameter check method:
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.1 engines that have received a pre-certificate
(EIAPP Certificate) on the test bed and those that received a certificate
(EIAPP Certificate) following an initial certification survey in accordance
with 2.2.4; and
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.2 engines that have undergone modifications or
adjustments to the designated engine components and adjustable features
since they were last surveyed.
6.2.1.2 When a marine diesel engine is designed to run
within the applicable NOx emission limit, it is most likely that within the
marine life of the engine, the NOx emission limit may be adhered to. The
applicable NOx emission limit may, however, be contravened by adjustments or
modification to the engine. Therefore, an engine parameter check method shall be used to
verify whether the engine is still within the applicable NOx emission limit.
6.2.1.3 Engine component checks, including checks
of settings and an engine’s operating values, are intended to
provide an easy means of deducing the emissions performance of the
engine for the purpose of verification that an engine with no, or
minor, adjustments or modifications complies with the applicable NOx emission limit. Where the measurement of some operating values
is required, the calibration of the equipment used for those measurements
shall be in accordance with the requirements of appendix 4 of this Code.
6.2.1.4 The purpose of such checks is to provide
a ready means of determining that an engine is correctly adjusted
in accordance with the manufacturer’s specification and remains
in a condition of adjustment consistent with the initial certification
by the Administration as being in compliance with regulation 13 as applicable.
6.2.1.5 If an electronic engine management system
is employed, this shall be evaluated against the original settings
to ensure that appropriate parameters are operating within “as-built”
limits.
6.2.1.6 For the purpose of assessing compliance
with regulation 13, it is not
always necessary to measure the NOx emissions to know that
an engine, not equipped with an after-treatment device, is likely
to comply with the applicable NOx emission limit. It may
be sufficient to know that the present state of the engine corresponds
to the specified components, calibration or parameter adjustment state
at the time of initial certification. If the results of an engine
parameter check method indicate the likelihood that the engine complies
with the applicable NOx emission limit, the engine may
be re-certified without direct NOx measurement.
6.2.1.7 For an engine equipped with a NOx reducing
device, it will be necessary to check the operation of the device
as part of the engine parameter check method.