Engines are the predominant source of Earth’s air pollution contributor, hence there are various emission laws which mandate the use of emission test cycle to verify that engine adhere to predetermined emission limits. A protocol found in an emission standard that enables consistent and comparable measurement of exhaust emissions for various engines is known as an emission test cycle. The values of emission parameters are the result of emission cycle. Measurements of GHG (Green House Gas) emissions - particulate number and particulate matter, carbon monoxide, total hydrocarbon, and nitrogen oxides are used to determine exhaust gas thermodynamic characteristics, fuel-air ratio, combustion efficiency, and emission indices, as they link engine performance to environmental impact. The engine and after-treatment system’s exhaust emissions are currently having a significant negative impact on the environment. The emission indices (EI) are the characteristics that engine engineers and atmospheric emissions regulatory agencies are most interested in.
This paper provides information for the analysis and assessment of emissions from diesel engines. This paper will elaborate the concept of the entire testbed configuration, the associated emission cycles, and the relevant European emission standards for diesel engines. The paper focuses on elaborating challenges seen on achieving boundary conditions & controlling measurement uncertainty, establish data quality checks with complexity of equipment's, engine and aftertreatment system interactions. In summary, it also discusses establishing the processes for Right First-Time and result accuracy for improving the productivity of the labs and the environmental impact reduction.