Abstract
A portable emission testing system（PEMS） was used to test the real driving emissions of four typical heavy-duty diesel vehicles and four typical heavy-duty liquefied natural gas（LNG） vehicles respectively. The real driving emission characteristics of NOx，CO，CO2，and particulate number（PN） were analyzed by the work-based window method and trip average method. The results indicats that the emission aftertreatment technology can effectively control the NOx，CO，and PN emission factors of China VI heavy-duty diesel vehicles under real driving conditions. However，the CO emission of LNG vehicles have a risk of exceeding the emission limit，and some LNG vehicles have a phenomenon of over-NOx-emission. The PN emissions are uncertain，and some LNG vehicles have higher PN emissions. For carbon emissions，the real driving CO2 emission factors of LNG vehicles are 6%~18% lower than those of diesel vehicles，where the carbon reduction is of a great manifest.
| Translated title of the contribution | Real Driving Emissions from China Ⅵ Heavy-Duty Diesel–Liquefied Natural Gas Vehicles |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 61-67 |
| Number of pages | 7 |
| Journal | Neiranji Gongcheng/Chinese Internal Combustion Engine Engineering |
| Volume | 43 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Oct 2022 |