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PTI Pilot Program

3DATX is collaborating with testing agencies in multiple countries in Europe on the next generation periodic technical inspection (PTI) which aims to expand PN to gasoline vehicles and adds NOx for both diesel and gasoline vehicles. This pilot includes real-world emissions measurement at PTI stations, simulated PTI trials, design of test protocols, and evaluation of the 3DATX parSYNC iPEMS drift and calibration frequency.

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New Approaches to Vehicle Emissions Inspections – Part 1

Date: February 23, 2021 

This webinar covers the findings from the first month of vehicle emissions data collected using the parSYNC® iPEMS under the 3DATX sponsored PTI Trial supported by CITA. The data were collected by OPUS at their Borås, Sweden site.  

The current PTI test protocols and emissions checks, CO for petrol and smoke opacity for diesel, do not have the capability to measure particle number (PN) and oxides of nitrogen (NOx) emissions from current technology vehicles. As a consequence, the current PTI program is unable to identify PN and NOx high-emitters. It is therefore important to update the PTI test, and the use of integrated PEMS (iPEMS) solutions in a new PTI procedure (NPTI) to achieve this is an appealing solution. At the Borås site, an engine idle PN test and two different NOx tests (one dynamic acceleration test and one stationary high idle test) are being performed on a growing number of vehicles. Initial findings are promising, with high repeatability for individual vehicles and a wide range of results between vehicles, indicating good sensitivity of the equipment and protocol to vehicle emission levels. As the number of vehicles tested increases, 3DATX will further the investigation into the effectiveness of the protocol and be able to assess thresholds for pass/fail criteria. 

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    New Approaches to Vehicle Emissions Inspections – Part 2 

    Date: June 30, 2021S In this second webinar on the 3DATX sponsored PTI Trial supported by CITA, the vehicle emissions database is expanded to over 160 vehicles, a four-fold increase since the first webinar in February 2021. This update includes: 

    1. Proposed enhanced PTI test protocol for gaseous and particulate emissions from gasoline and diesel fuelled vehicles. In this enhanced protocol the emission tests are completed in 70% less time compared to the protocol presented in the first webinar.   
    2. Preliminary threshold for nitrogen oxides (NOx as NO + NO2) emissions to identify malfunctioning or tampered emissions aftertreatment devices. Three types of emissions thresholds are discussed – normal idle, stationary high RPM, and short driving acceleration – and based on which tests are permitted in a country, one or more metric could be used.  
    3. Comparison of carbon monoxide (CO) and particle number (PN) results from the enhanced PTI protocol to the current PTI based CO and smoke opacity data, respectively.

    Supporting Information: Time-Series Data of Individual Vehicles