For NOx restriction

For NOx restriction

About the Marpol 73/78 Annex Ⅵ and Our Compliance

<Tier I>
MARPOL 73/78 Annex Ⅵ as Tier I, “Regulations for the Prevention of Air Pollution from Ships” entered into force on May 19, 2005. And as for engines installed on oceangoing ships, the regulations apply retroactively to January 1, 2000. With regard to coastal ships, the regulations have been implemented on May 19, 2005.

<Tier II>
The revised MARPOL 73/78 Annex Ⅵ approved October 2008 requires ships to reduce NOx emission by further 15-22% as second-step restriction. The revised annex has entered into force on July 1, 2010 and that this restriction has been implemented for the engine which is installed on a ship constructed on or after January 1, 2011.

We have already added engines which conform to Tier II as well as Tier I to our line-up, and all engines shipped in and after 2000 satisfy the regulations. However, in order to ensure continuous conformity to the regulation and to responsibly guarantee maximum performance, we request for the customers to apply only Daihatsu Diesel genuine parts in replacing component parts and to work in accordance to our parts management system, which is designed to prevent erroneous shipment as well.
(Every NOx component is inscribed with an ID number that indicates the compliance with the restriction. During inspections, the corresponding parts will be checked and the detection of nonconforming parts with mismatched ID numbers will result in the loss of the certification. The Daihatsu Diesel parts management system was established to avoid such cases by making it possible to verify shipment records by ship name and owner. )
We kindly request that you inform us with your dock schedule as soon as it is fixed so that we can take all possible measures in advance.
If you happen to have any queries whatsoever, please feel free to contact DAIHATSU DIESEL MFG.CO.,LTD..

Countermeasures for Enforcement of Annex VI added to the MARPOL 73/78

For a ship equipped with an NOx conforming diesel engine to acquire the International Air Pollution Prevention Certificate, NOx emission of its engine has to fall within the regulation value at the on-board inspection.

In this connection, prior to enforcement of the new regulations on May 19, 2005, the Company intends to take measures so as to ensure smooth implementation of the "Initial On-board Verification ( Parameter Check method ) as the second stage inspection and the "Port State Control".
In case that use of a part other than genuine parts listed on the onboard document, modification of an NOx related part, or a change in adjusted value are found, the Company is unable to guarantee the compliance with the NOx emission regulation.

You are kindly requested to check, prior to the on-board inspection, the following NOx related parts/adjusted values as well as the onboard documents and to be prepared for the inspection.

Parameters for the NOx related parts as well as the adjusted values are stipulated as follows in the technical file :

  1. Fuel oil cam
  2. Piston
  3. Cylinder head
  4. Fuel oil Injection valve
  1. Fuel oil injection nozzle
  2. Fuel oil plunger
  3. Fuel oil Injection pump
  4. Air cooler
  1. Turbo charger
  2. Operating pressure of fuel injection valve
  3. Fuel injection timing
  4. Top clearance

As the above parts, 1 to 9, are each stamped with an part identification number ( ID number ),
please check to confirm it. ( Stated in the ENGINE PARAMETER INSPECTION RECORD. )

Further, the documents subject to the inspection of the Company's diesel (onboard documents) include the following :

  1. NOx certificate with supplement
  2. Technical file with On-board NOx verification procedures
  3. Record book of Engine parameters
  4. Engine parameter inspection record

( The document 4 corresponds to the engine parameter list of NOx code 6.2.3.2. )

Further, for the sake of smooth operation of the initial inspection of engines which have already been mounted, be sure to enter records into the Record Book of Engine parameters whenever a change/modification or a change in an adjusted value is made regarding the NOx related parts even before enforcement of the new rules.
The procedure for preparation/entry is as follows: SAMPLE

NOx Emission Compliance Concept

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