L 45/1390
EN
Official Journal of the European Union
24.2.2022
COMMISSION PILOT PROJECTS
CHAPTER PP 01 — RESEARCH AND INNOVATION (cont'd) PP 01 21
(cont'd)
PP 01 21 01
(cont'd) The emission reduction potential by filtration of brake dust should be evaluated.
Due to the complex conditions in the vicinity of the brake and the wheelhouse, laboratory tests on an inertia dynamometer test bench should be done as a first step, following the approach of the Particle Measurement Programme working group.
The laboratory tests should be performed for at least three vehicles, covering light and commercial vehicle brakes.
(b) Additional field tests evaluating the emission footprint reduction by brake dust filtration
The complex conditions in the wheelhouse near the brake cannot be properly covered by laboratory tests.
Therefore additional field test should be performed for at least three vehicles, covering light and commercial vehicle brakes.
Based on gravimetric measurement, the particulate matter reduction under real-driving conditions should be shown and compared to the laboratory results.
(c) Laboratory tests evaluating the emission footprint reduction by active ambient air filtration systems
The volume flow rate through the active air filter system is to be determined for several driving velocities on the lab scale.
The laboratory setup allows reproducible testing independent of environmental conditions.
Therefore wind tunnel experiments should be performed.
Based on the determined volume flow rates, the emission reduction can be calculated based on the knowledge of typical ambient duct concentrations.
The wind tunnel tests should be performed for at least three vehicles, covering light, commercial and heavy-duty vehicles.
(d) Additional field tests evaluating the emission footprint reduction by active ambient air filtration systems
The reduction potential of the identified solutions should be tested in addition in a field test under real-driving conditions.
At least two retrofit solutions should be tested and the PM10 and PM2.5 reduction quantified under various ambient conditions (temperature, humidity, particulate matter concentration, traffic intensity).
The field test should be performed for at least 20 vehicles, covering light, commercial and heavy-duty vehicles, in at least three European cities.
The field test results should give indication for further legislation about the influence of environmental condition on the overall particulate matter footprint of vehicles.
(3) Feasibility study and demonstrator vehicle for integrated fine dust particle filtration systems
A feasibility study to investigate the possibilities to integrate the previously described retrofit solutions within future vehicles should be performed.
Especially it should be outlined up to which extent filtration systems can be integrated into the future fleet.
A holistic technical review has to be carried out to estimate the overall impact on the vehicle emission footprint.
Furthermore a prototype vehicle (demonstrator car) should be built to show the integrated concepts and for use in further field tests.