割草机排放测试：PEMS试点及未来监测计划.pdf

1、Lawnmower Emissions PEMS Pilot Testing and Upcoming Surveillance ProgramDavid Chou,Kaishan Zhang(AQPSD)John Karim,Stephanie Maalouf(MSLD)OSAR Annual ConferenceMarch 13-14.20241OutlineBackground and ObjectivesEquipmentPreparation and Data CollectionResultsConclusionsNext Steps2Background3PEMS are wid

2、ely applied for on-road vehicles and off-road diesel equipmentCurrent PEMS may not be applicable for small off-road engines(SORE)as it requires a complex set-up Emissions of reactive organic gases(ROG)and oxides of nitrogen(NOx)from SORE becomes increasing importantSORE emissions have a direct healt

3、h impact to the local communities and the lawn and garden workers Objectives Evaluate the technical challenges associated with PEMS measurement of SORE Compare real-world emissions vs.emission standards Compare real-world emissions vs.SORE2020 emission factor Understand the operating cycle for lawn

4、mower(idling,stop-and-go)4Equipment 2005 new Honda walk-behind lawn mower 4.4 hp(4-stroke and carbureted)PEMS and auxiliary unitsAVL 493 Gaseous PEMS(1065 PEMS with NDUV analyzer for NOx and NDIR analyzer for CO and CO2)AVL heated FID for measuring THC(part of the AVL 493 gaseous PEMS)AVL PM PEMS wi

5、th Micro soot sensor and gravimetric filter methodsEco Physics PEMS(CLA analyzer for NOx)ECM sensor for NOx ECM sensor for CO2and COAVL PLUtron(Fuel mass flow meter with CO2 measurement)RPM meter5“Dry Run”at ARB Parking Lot6Practice Run at a local residence PreparationTesting at Glendora High School

6、7Field testing lasted about one hourIncludes idling time,stop and go Generator used for power supplyReal-World Measurements Video Clip89010020030040050060000.10.20.30.40.50.60500100015002000Glendora High School(CO2)*Cumulative CO2CO2CO2(g/s)Cumulative CO2(g)Time(s)*CorrectedCO2100246810121400.010.02