快速识别高排放重型车辆的工具开发.pdf

1、Developing Tools to Quickly Find Potentially High Developing Tools to Quickly Find Potentially High Emitting HeavyEmitting Heavy-Duty Vehicles Duty Vehicles Carl Fulper&Jim Warila EPA/OTAQ/ASDMichael Sabisch&Brent Ruminski,Eastern Research Group(ERG)OSAR ConferenceMarch 14 15,2024US Environmental Pr

2、otection Agency,Office of Transportation&Air QualityNational Vehicle and Fuel Emissions Laboratory,Ann Arbor,MI Study was performed to evaluate commercial(or pre-commercial)tools to“automatically”detect vehicles with potentially high emissions in less than 2-3 minutes EPA wants to better understand

3、the in-use emissions from the diesel fleet since the implementation of the MY2007/2010 regulations.What fraction of the fleet consists of high emitting vehicles,across engine manufacturers and/or vehicle types within the fleet?“Blind”Testing Protocols and analysis was used between scanning tools“Tam

4、pered”For purpose of this study,means vehicles where the emission control hardware is electronically and/or physically disabled and OBD software functions related to these systems were disabled or otherwise bypassed.Primarily evaluated the exhaust gas recirculation(EGR)system,diesel oxidation cataly

5、st(DOC),diesel particulate filter(DPF),and selective catalytic reduction(SCR)system.Approximately 75 vehicles were evaluated at an auction site in 2023 The sample of vehicles tested is not representative of the fleet because efforts were made to select vehicles that included potential tampering Vehi

6、cles tested included:Medium-duty(MD)diesel trucks:(8501-14,000 lbs.GVWR),Model Year(MY)2007+,OBDII compliant Heavy-duty(HD)diesel trucks:(14,001 lbs.GVWR),MY 2011+,OBD compliant Variety of types of vehicles:tractors,stake bed,garbage,boom,water,box trucks Mixture of Vehicle and Engine Manufacturers: