On-road emission screening for a more efficient control of the emission performance of light-duty diesel vehicles

Purpose and goal

The overall goal was to investigate how remote sensing can be used to achieve a stricter and more efficient emission conrol for light diesel vehicles, partly in the in-use compliance programs, partly in the PTI (periodical technical inspection). To achieve this, measurement data from the project and other sources were analyzed to investigate how well emissions in real traffic measured by remote sensing are consistent with PEMS measurements. To investigate the issue of more effective PTI, various measurement methods were tested in connection with an inspection station.

Expected results and effects

Some results from the project are considered suitable for assessments of which vehicle models that are interesting to test within national in-use compliance programs. It was also shown within the project that Mini-PEMS is an interesting alternative if measurements of nitrogen oxides should be introduced as part of the PTI (periodical technical inspection). Measurements from the roadside can also be an interesting alternative for the PTI, but in that area more studies are needed to investigate how such measurements should be performed and how the results should be interpreted.

Planned approach and implementation

The approach was to evaluate remote sensing as a method to use in in-use compliance programs and the periodical technical inspection outgoing from measurement data from the project and from already existing data sources. Extensive work has been done to calculate average emissions of nitrogen oxides for different vehicle models, engine sizes and engine families. Comparisons of remote sensing and PEMS as methods for exhaust gas measurements from real traffic have been made both based on measurements of specific vehicle individuals but also for vehicle models and engine families.

External links

Slutrapporten kommer att läggas upp på IVLs hemsida med rapport nummer IVL C620.