BS ISO 8178-4:2020 pdf free

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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 measurements at site. The tests are carried out under steady-state and transient operation using test cycles which are representative of given applications. This document is applicable to RIC engines for mobile, transportable and stationary use, excluding engines for on-road transport of passengers and goods. It can be applied to engines for non-road use, e.g.for earth-moving machines, generating sets and for other applications. For engines used in machinery
covered by additional requirements (e.g. occupational health and safety regulations, regulations for power plants), additional test conditions and special evaluation methods can apply.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 8178-1:2020, Reciprocating internal combustion engines一Exhaust emission measurement一Part 1:Test-bed measurement of gaseous and particulate exhaust emissions ISO 8178-5, Reciprocating internal combustion engines- Exhaust emission measurement一Part 5:
Test fuels ASTM E29-06b, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications.3.2 applicable emission limit emission limit to which an engine is subject 3.3 aqueous condensation precipitation of water-containing constituents from a gas phase to a liquid phase Note 1 to entry: Aqueous condensation is a function of humidity, pressure, temperature, and concentrations of other constituents such as sulphuric acid. These parameters vary as a function of engine intake-air humidity, dilution-air humidity, engine air-to-fuel ratio, and fuel composition一- including the amount of hydrogen and sulphur in the fuel. 3.4 atmospheric pressure wet, absolute, atmospheric static pressure Note 1 to entry: If the atmospheric pressure is measured in a duct, negligible pressure losses shall be ensured between the atmosphere and the measurement location, and changes in the duct’s static pressure resulting from the flow shall be accounted for.3.5 calibration process of setting a measurement system’s response so that its output agrees with a range of reference signals
Note 1 to entry: Contrast with verification (3.78).BS ISO 8178-4 pdf download.

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