4.1 General
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Statutory Documents - IMO Publications and Documents - International Codes - NOx Technical Code (2008) - Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - Chapter 4 - Approval for serially manufactured engines: engine family and engine group concepts - 4.1 General

4.1 General

  4.1.1 To avoid certification testing of every engine for compliance with the NOx emission limits, one of two approval concepts may be adopted, namely the engine family or the engine group concept.

  4.1.2 The engine family concept may be applied to any series-produced engines that, through their design are proven to have similar NOx emission characteristics, are used as produced and, during installation on board, require no adjustments or modifications that could adversely affect the NOx emissions.

  4.1.3 The engine group concept may be applied to a smaller series of engines produced for similar engine application and that require minor adjustments and modifications during installation or in service on board.

  4.1.4 Initially the engine manufacturer may, at its discretion, determine whether engines should be covered by the engine family or engine group concept. In general, the type of application shall be based on whether the engines will be modified, and to what extent, after testing on a test bed.

Parent topic: Chapter 4 - Approval for serially manufactured engines: engine family and engine group concepts
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