BS ISO 8178-6:2018 pdf free.Reciprocating internal combustion engines – Exhaust emission measurement.
Table A.1 includes the information essential for engine approval, such as engine identification, engine application, test cycle and test identification. The emission test results may be listed for different test cycles, if applicable. The gaseous and particulate emissions shall be expressed in grams per kilowatt hour whenever possible. Other units shall be indicated if used according to the provisions laid down in the Scope of this document. The smoke test results shall be listed for the smoke cycle applicable to the indicated application. The smoke values shall be expressed per metre whenever possible.
5.3 Engine information
Table A.2 contains the basic features of the engine under test. If more information is requested by other parties, this can be provided. Table A.3 contains other information on the engine under test pertinent to the identification of the engine family or group. These features are derived from ISO 8178-7 for engine family and ISO 8178-8 for engine group. If the engine family or group concept does not apply for the engine under test, Table A.3 does not need to be submitted.
5.4 Ambient and engine test data
For steady-state discrete mode test, Table A.4 includes in the upper part the relevant ambient data. in the lower part the relevant engine data required to be recorded in ISO 81784. In most cases. mechanical shaft power is used for the calculation of the final results. If other kinds of power are used, e.g. electrical, thermal or total power, this shall be indicated. Fuel flow, air flow and exhaust flow may be expressed as volume or mass flow rates, and the unit used shall be filled in. The measurement values shall be recorded for each mode individually, and the cycle value shall be calculated for the power and recorded. For further details, refer to ISO 8178-4.
For steady-state RMC test and transient test, the actual cycle worl in Table A.5 shall be calculated by integrating over the cycle in order to calculate the brake specific emissions. For further details, refer to ISO 8178-4.
5.5 Gaseous emissions data
5.5.1 Steady-state discrete mode test
Table A.6 contains in the upper part the originally measured (or calculated for SO2) concentrations of the gaseous emissions either in the raw or dilute exhaust gas for each individual mode.
For engines with infrequent exhaust regeneration, the recorded value shall be the one which has been corrected with the appropriate upward or downward regeneration adjustment factor, kr. For further details, refer to ISO 8178-4.BS ISO 8178-6 pdf download.
Tags: Reciprocating internal combustion engines
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