Reciprocating internal combustion engines - Exhaust emission measurement - Part 6: Report of measuring results and test
1Key Takeaways
This document specifies a data format for reporting the measurement results of exhaust emissions from RIC engines for mobile, transportable and stationary use, excluding engines for motor vehicles primarily designed for road use. It includes basic information of the engine being tested. Equivalent data formats includin…
2Expert Interpretation
An in-depth look at the ISO 8178-6:2018 international standard, covering the reporting format requirements for emissions measurements on reciprocating internal combustion engines. This standard includes test data recording specifications, emission result calculation methods, and test environment information recording standards. It applies to laboratory and field testing of mobile, transportable, and stationary internal combustion engines.
Interpretation of the core content of the standard
ISO 8178-6:2018 is the sixth part of the internal combustion engine emission measurement series, which specifically regulates the reporting format of test results. This standard applies to all types of internal combustion engines except road vehicle engines, with the following highlights:
Test report structure requirements
| Data module | Required content | Technical indicators |
|---|---|---|
| Basic information (Table A.1) | Engine identification, test cycle type | Must indicate g/kWh or g/m³ units |
| Engine parameters (Table A.2-3) | Rated power, speed range | As per ISO 8178-7/8 requirements |
| Environmental data (Table A.4-5) | Atmospheric pressure, intake air humidity | Accuracy±0.5kPa/±5%RH |
Key Technology Updates
Major changes compared to the 2000 edition:
- Added the applicability of the steady-state RMC test cycle and the transient test cycle
- Updated the validation criteria for the particulate sampling system
- Introduced the concept of the Infrequent Regeneration Adjustment Factor (IRAF)
- Simplified the structure of the fuel characteristic table
Implementation Points
Emission Data Processing
For engines equipped with aftertreatment systems, special attention should be paid to the following:
- Calculation of NOx Humidity Correction Factor (kh)
- Application of Dry-Wet Conversion Factor (kw)