6.2.2.1 Every marine diesel engine shall have
a technical file as required in 2.3.4 which
identifies the engine’s components, settings or operating values
that influence exhaust emissions and must be checked to ensure compliance.
6.2.2.2 An engine’s technical file shall
contain all applicable information, relevant to the NOx emission
performance of the engine, on the designated engines components, adjustable
features and parameters at the time of the engine’s pre-certification
or onboard certification, whichever occurred first.
6.2.2.3 Dependent on the specific design of the
particular engine, different onboard NOx influencing modifications
and adjustments are possible and usual. These include the engine parameters
as follows:
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.1 injection or ignition timing,
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.2 injection nozzle,
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.3 injection pump,
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.4 fuel cam,
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.5 injection pressure for common rail systems,
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.6 combustion chamber,
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.7 compression ratio,
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.8 turbocharger type and build,
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.9 charge air cooler, charge air pre-heater,
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.10 valve timing,
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.11 NOx abatement equipment “water
injection”,
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.12 NOx abatement equipment “emulsified
fuel” (fuel water emulsion),
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.13 NOx abatement equipment “exhaust
gas recirculation”,
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.14 NOx abatement equipment “selective
catalytic reduction”,
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.15 other parameter(s) specified by the
Administration, or
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.16 gas valve.
6.2.2.4 The actual technical file of an engine
may, based on the recommendations of the applicant for engine certification
and the approval of the Administration, include less components and/or
parameters than discussed in section 6.2.2.3 depending
on the particular engine and the specific design.
6.2.2.5 For some parameters, different survey
possibilities exist. As approved by the Administration, the shipowner,
supported by the applicant for engine certification, may choose what
method is applicable. Any one of, or a combination of, the methods
listed in the check list for the engine parameter check method given
in appendix 7 of this Code may be
sufficient to show compliance.
6.2.2.6 Technical documentation in respect of
engine component modification for inclusion in an engine’s technical
file shall include details of that modification and its influence
on NOx emissions, and it shall be supplied at the time
when the modification is carried out. Test-bed data obtained from
a later engine that is within the applicable range of the engine group
concept may be accepted.
6.2.2.7 The shipowner or person responsible for
a ship equipped with a marine diesel engine required to undergo an
engine parameter check method shall maintain on board the following
documentation in relation to the onboard NOx verification
procedures:
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.1 a record book or electronic record bookfootnote of engine parameters for recording all changes,
including like-for-like replacements, and adjustments within the approved ranges
made relative to an engine’s components and settings;
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.2 an engine parameter list of an engine’s
designated components and settings and/or the documentation of an
engine’s load-dependent operating values submitted by an applicant
for engine certification and approved by the Administration; and
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.3 technical documentation of an engine component
modification when such a modification is made to any of the engine’s
designated engine components.
6.2.2.8 Descriptions of any changes affecting
the designated engine parameters, including adjustments, parts replacements
and modifications to engine parts, shall be recorded chronologically
in the record book of engine parameters. These descriptions shall
be supplemented with any other applicable data used for the assessment
of the engine’s NOx emissions.