BS ISO 8178-4:2020 pdf free.Reciprocating internal combustion engines- Exhaust emission measurement.Steady-state and transient test cycles for different engine applications. BS ISO 8178-4 This document specifies the test cycles, the test procedures and the evaluation of gaseous and particulate exhaust emissions from reciprocating internal combustion (RIC> engines coupled to a dynamometer. With certain restrictions, this document can also be used for...