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Reciprocating internal combustion engines — Exhaust emission measurement — Part 9: Test cycles and test procedures for test bed measurement of exhaust gas smoke emissions from compression ignition engines operating under transient conditions
For transient smoke test cycles, smoke testing is conducted using smokemeters which operate on the light extinction principle. The purpose of ISO 8178-9:2012 is to define the smoke test cycles and the methods used to measure and analyse smoke. Specifications for measurement of smoke using the light extinction principle can be found in ISO 11614.
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