Abstract
Motor vehicle remote sensing monitoring（hereinafter referred to as telemetry）is fast and convenient, which can reduce the authorities’work and support the supervision of vehicle pollution emission and law enforcement. This study conducted a statistical analysis on the pollution emission data at 60 road vehicle telemetry sites in Beijing from January to April 2021, and obtained characteristics of air pollutant emission concentration（volume concentration）from gasoline vehicles in Beijing, such as the cumulative distribution probability. Based on the data comparison and typical field experiments, the correlation analysis of the air pollutant emission of vehicles in the steady-state operating mode（ASM）and telemetry was carried out. Then suggestions for the revision of Beijing local standards were put forward. The research results show that：① The 11.497 million monitored data are arranged in descending order of pollutant concentration, and the top 10%, 50% and 90% CO volume concentrations of the cumulative distribution probability are 1.73%, 0.58% and 0.16% respectively；Those for HC are 96.38×10-6, 22.44×10-6 and 6.59×10-6, respectively；For NO are 686.58× 10-6, 117.70×10-6 and 24.13×10-6, respectively. ② The emission level has a great relationship with emission standard. The pollutant concentration emitted from China VI vehicle is significantly lower than that of China I vehicle. The CO volume concentration decline rate corresponding to the top 10%, 50% and 90% of the cumulative distribution probability is 54.83% ~85.71%, the decrease rate of HC was 75.71%~85.35%, and the NO was 65.73%~85.00%. ③ Correlation analysis with the steady-state operating mode method shows that the emission levels in numerous of samples that detected by the two methods tend to be the same, but for a single vehicle, there is a certain degree of volatility. ④ The currently implemented Beijing local standard pollutant types are not complete, and the limit value is relatively loose. It is recommended to make full use of the existing remote sensing equipment resources, include HC and NO into the standard limit value, screen high-emission vehicles, and improve the efficiency of motor vehicle emission supervision and law enforcement.
| Translated title of the contribution | Beijing gasoline vehicle air pollution emission level based on road remote sensing monitoring and enlightenment to standard revision |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 101-108 |
| Number of pages | 8 |
| Journal | Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae |
| Volume | 42 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2022 |