Cooperative Study of Heavy Duty Diesel Emission Measurement Methods

1978 ◽  
Author(s):  
J. M. Perez ◽  
W. B. Clemmens ◽  
L. C. Broering ◽  
John H. Johnson
Keyword(s):  
Measurement Methods ◽  
Emission Measurement ◽  
Cooperative Study ◽  
Heavy Duty ◽  
Diesel Emission ◽  
Heavy Duty Diesel

Meeting the US 2007 Heavy-Duty Diesel Emission Standards - Designing for the Customer

2007 ◽  
Author(s):  
Thomas A. Dollmeyer ◽  
David A. Vittorio ◽  
Thomas A. Grana ◽  
James R. Katzenmeyer ◽  
Stephen J. Charlton ◽  
...  
Keyword(s):  
Heavy Duty ◽  
Emission Standards ◽  
The Us ◽  
Diesel Emission ◽  
Heavy Duty Diesel

scholarly journals Characterization of Real-World Pollutant Emissions and Fuel Consumption of Heavy-Duty Diesel Trucks with Latest Emissions Control

Atmosphere ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 535 ◽  
Author(s):  
Christos Keramydas ◽  
Leonidas Ntziachristos ◽  
Christos Tziourtzioumis ◽  
Georgios Papadopoulos ◽  
Ting-Shek Lo ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Real World ◽  
Emission Factors ◽  
Pollutant Emissions ◽  
Particulate Filter ◽  
Emission Measurement ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Diesel Trucks ◽  
The Impact

Heavy-duty diesel trucks (HDDTs) comprise a key source of road transport emissions and energy consumption worldwide mainly due to the growth of road freight traffic during the last two decades. Addressing their air pollutant and greenhouse gas emissions is therefore required, while accurate emission factors are needed to logistically optimize their operation. This study characterizes real-world emissions and fuel consumption (FC) of HDDTs and investigates the factors that affect their performance. Twenty-two diesel-fueled, Euro IV to Euro VI, HDDTs of six different manufacturers were measured in the road network of the Hong Kong metropolitan area, using portable emission measurement systems (PEMS). The testing routes included urban, highway and mixed urban/highway driving. The data collected corresponds to a wide range of driving, operating, and ambient conditions. Real-world distance- and energy-based emission levels are presented in a comparative manner to capture the effect of after-treatment technologies and the role of the evolution of Euro standards on emissions performance. The emission factors’ uncertainty is analyzed. The impact of speed, road grade and vehicle weight loading on FC and emissions is investigated. An analysis of diesel particulate filter (DPF) regenerations and ammonia (NH3) slip events are presented along with the study of Nitrous oxide (N2O) formation. The results reveal deviations of real-world HDDTs emissions from emission limits, as well as the significant impact of different operating and driving factors on their performance. The occasional high levels of N2O emissions from selective catalytic reduction equipped HDDTs is also revealed, an issue that has not been thoroughly considered so far.

Uncertainties of polynuclear aromatic hydrocarbon and carbonyl measurements in heavy-duty diesel emission

2006 ◽  
Vol 29 (2) ◽  
pp. 302-307 ◽  
Author(s):  
Rosanna Mabilia ◽  
Angelo Cecinato ◽  
Ettore Guerriero ◽  
Massimiliano Possanzini
Keyword(s):  
Aromatic Hydrocarbon ◽  
Polynuclear Aromatic Hydrocarbon ◽  
Heavy Duty ◽  
Diesel Emission ◽  
Heavy Duty Diesel

scholarly journals The challenge to NO<sub>x</sub> emission control for heavy-duty diesel vehicles in China

2012 ◽  
Vol 12 (7) ◽  
pp. 18565-18604 ◽  
Author(s):  
Y. Wu ◽  
S. J. Zhang ◽  
M. L. Li ◽  
Y. S. Ge ◽  
J. W. Shu ◽  
...  
Keyword(s):  
Emission Factors ◽  
Operating Conditions ◽  
Nox Emission ◽  
Effective Control ◽  
Emission Measurement ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Diesel Vehicles ◽  
Compliance Testing ◽  
Heavy Duty Diesel

Abstract. China's new "Twelfth Five-Year Plan" set a target for total NOx emission reduction of 10% for the period of 2011–2015. Heavy-duty diesel vehicles (HDDVs) have been considered a major contributor to NOx emissions in China. Beijing initiated a comprehensive vehicle test program in 2008. This program included a sub-task for measuring on-road emission profiles of hundreds of HDDVs using portable emission measurement systems (PEMS). The major finding is that neither the on-road distance-specific (g km −1) nor brake-specific (g kW h−1) NOx emission factors for diesel buses and heavy-duty diesel trucks improved in most cases as emission standards became more stringent. For example, the average NOx emission factors for Euro II, Euro III and Euro IV buses are 11.3±3.3 g km−1, 12.5± 1.3 g km−1, and 11.8±2.0 g km−1, respectively. No statistically significant difference in NOx emission factors was observed between Euro II and III buses. Even for Euro IV buses equipped with SCR systems, the NOx emission factors are similar to Euro III buses. The data regarding real-time engine performance of Euro IV buses suggest the engine certification cycles did not reflect their real-world operating conditions. These new on-road test results indicate that previous estimates of total NOx emissions for HDDV fleet may be significantly underestimated. The new estimate in total NOx emissions for the Beijing HDDV fleet in 2009 is 37.0 Gg, an increase of 45% compared to the previous study. Further, we estimate that the total NOx emissions for the national HDDV fleet in 2009 are approximately 4.0 Tg, higher by 1.0 Tg (equivalent to 18% of total NOx emissions for vehicle fleet in 2009) than that estimated in the official report. This would also result in 4% increase in estimation of national anthropogenic NOx emissions. More effective control measures (such as promotion of CNG buses and a new in-use compliance testing program) are urged to secure the goal of total NOxmitigation for the HDDV fleet in the future.

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