On-road measurement of emissions of reactive nitrogen compounds and greenhouse gases from Euro 6 diesel and natural gas vans using an on-board FTIR

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00312217" target="_blank" >RIV/68407700:21220/17:00312217 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

On-road measurement of emissions of reactive nitrogen compounds and greenhouse gases from Euro 6 diesel and natural gas vans using an on-board FTIR

Original language description

Two automobiles and six vans, half powered by diesel fuel, half by natural gas, have been tested on chassis dynamometer using multiple driving cycles and on the road. An industrial FTIR analyzer was used to measure all gaseous pollutants and a NanoMet3 analyzer to measure the number concentrations of non-volatile particles. Exhaust flow was inferred from engine control unit data. In the lab, the measurements also included traditional instrumentation including particle classifiers. On all diesel vehicles, the emissions of nitrogen oxides (NOx) were relatively high, with a high share of nitrogen dioxide. On some vehicles, NOx were also high during a warm-start type approval cycle (NEDC), suggesting that the disparity between the real world and type approval limits is to be addressed. One van from a rental fleet had excessive emissions of particles, suggesting that the technical condition of the general fleet should be continuously assessed. The emissions of ammonia were negligible. The global warming potential of nitrous oxide was equivalent to several g/km CO2, suggesting that it should be included in assessment of greenhouse gas emissions. Natural gas vehicles, all using port fuel injection spark ignition engines with electronic controls and three-way catalysts, produced relatively low emissions, with nitrogen monoxide and ammonia emissions both on the order of several tens of mg/km, methane emissions corresponding to < 1 g/km CO2, and negligible emissions of N2O, formaldehyde and acetaldehyde. The number of non-volatile particles varied greatly but was generally low except for the defective diesel vehicle. The on-board FTIR has proven to be a useful instrument capable of covering, except for total hydrocarbons, essentially all gases of interest. The optimization of the on-board system for simplicity of installation and operation has allowed, within the given budget and time, to test a relatively large number of vehicles, covering vehicle-to-vehicle variance.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

<a href="/en/project/LO1311" target="_blank" >LO1311: Development of Vehicle Centre of Sustainable Mobility</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů