A5017312675- Vehicle emissions and performance
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Smart Materials for Construction
- Traffic Prediction and Management Techniques
- Transportation Planning and Optimization
- Energy, Environment, and Transportation Policies
- Maritime Transport Emissions and Efficiency
- Catalytic Processes in Materials Science
- Transportation Safety and Impact Analysis
- Vehicle Noise and Vibration Control
- Advanced Combustion Engine Technologies
Eastern Research Group (United States)
2010-2018
Environmental Protection Agency
2010
The Kansas City Light-Duty Vehicle Emissions Study (KCVES) measured exhaust emissions of regulated and unregulated pollutants from 496 vehicles recruited in the metropolitan area 2004 2005. testing occurred during summer winter, with operated at ambient temperatures. One key component this study was investigation influence temperature on particulate matter (PM) gasoline-powered vehicles. A subset were tested both winter to further elucidate effects vehicle tailpipe emissions. results...
Abstract Mobile sources significantly contribute to ambient concentrations of airborne particulate matter (PM). Source apportionment studies for PM10 (PM ≤ 10 µm in aerodynamic diameter) and PM2.5 2.5 indicate that mobile can be responsible over half the PM measured an urban area. Recent source attempted differentiate between contributions from gasoline diesel motor vehicle combustion. Several conducted United States suggested combustion contributed more than However, existing emission...
Real-world vehicle and engine activity data were collected from 90 heavy-duty vehicles in California, United States, most of which have model year 2010 or newer are equipped with selective catalytic reduction (SCR). The represent 19 different groups defined by a combination vocational use geographic region. using advanced loggers that recorded speed, position (latitude longitude), more than 170 aftertreatment parameters (including load exhaust temperature) at the frequency one Hz. This...
The effects of exhaust emissions on public welfare have prompted the US Environmental Protection Agency to take various actions toward understanding, modeling, and reducing air pollution from vehicles. This study was performed better understand heavy-duty diesel-powered tractor-trailer trucks that operate in drayage service, which involves moving shipping containers or port terminals. involved use portable measurement systems (PEMS) measure both gaseous particulate matter (PM) mass emission...
Under contract to the EPA, Eastern Research Group analyzed light-duty vehicle OBD monitor readiness and diagnostic trouble codes (DTCs) using inspection maintenance (I/M) data from four states. Results roadside pullover emissions tests were also compared with same-vehicle I/M results one of Analysis focused on evaporative control (evap) system, catalytic converter (catalyst), exhaust gas recirculation (EGR) system oxygen sensor heater (O2 system). Evap catalyst monitors had similar overall...