scholarly journals Influence of after-treatment systems on NO2 emissions in diesel engines

2017 ◽  
Vol 170 (3) ◽  
pp. 24-29
Author(s):  
Andrzej ŻÓŁTOWSKI
Keyword(s):  
Particulate Matter ◽  
Human Health ◽  
Diesel Engines ◽  
Heavy Duty ◽  
Bench Tests ◽  
Exhaust Gases ◽  
No2 Formation ◽  
Heavy Duty Vehicles ◽  
Exhaust Systems

The article discusses the results of bench tests that monitor the increase of NO2 emissions in the heavy duty vehicles engines exhausts as a result of the use of particulate matter filters. The use of passive particulate matter filters inevitably leads to an increase in NO2 emissions from the engine. The particularly intensive increase in the emissions occurs when SCR reactors are shut off, which is still a common practice among drivers. NO2 concentrations in exhaust gases of DPF-equipped engines reach concentration dangerous for human health and life. The causes of the NO2 formation in the vehicles’ exhaust systems, the harmfulness of this chemical, and the results of NO2 measurements in different tests, are discussed. In addition, the effect of the presence of this compound on the accuracy of opacity measurement is discussed.

Reducing Particulate Matter and Oxides of Nitrogen Emissions from Heavy-Duty Vehicles: The Urban Bus Case

1998 ◽  
Vol 1641 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Paul Schimek
Keyword(s):  
Particulate Matter ◽  
Diesel Engines ◽  
Cost Effective ◽  
Alternative Fuel ◽  
Heavy Duty ◽  
Urban Transit ◽  
Transit Buses ◽  
Urban Bus ◽  
Heavy Duty Vehicles ◽  
Transit Bus

The 1990 Clean Air Act Amendments mandated stricter emissions standards for heavy-duty vehicles. One category of heavy-duty vehicles, urban transit buses, constitutes a highly visible source of pollutant emissions and must meet even more stringent standards. In response, engine manufacturers have produced diesel engines that produce virtually no black smoke and emit several times less particulate matter (PM) than older engines. The tighter PM emissions standards that apply to urban transit buses only were found to be cost-effective ($4,600 to $6,300 per Mg of PM reduced) compared with other control strategies. The Urban Bus Retrofit/Rebuild Program was found to be somewhat less cost-effective ($6,900 to $42,000 per Mg). Both of these programs could be extended to other heavy-duty vehicles. However, the use of compressed natural gas (CNG) in transit buses was found to have a costeffectiveness of $0.9 million to $1.8 million per Mg of PM. Replacing older diesel engines with low-emission diesels is the most cost-effective way to reduce transit bus emissions. By purchasing more clean diesels instead of fewer cleaner CNG buses, transit agencies can produce greater reductions in fleetwide emissions. In fact, the transit agency in this study with the most alternative-fuel buses has the highest fleetwide PM emissions rate. It is premature to expand the alternative-fuel transit bus fleet beyond the experimental level. Regulatory policy should be reassessed as the understanding of the link between diesel emissions and health effects improves.

Oxidative Potential of Semi-Volatile and Non Volatile Particulate Matter (PM) from Heavy-Duty Vehicles Retrofitted with Emission Control Technologies

2009 ◽  
Vol 43 (10) ◽  
pp. 3905-3912 ◽  
Author(s):  
Subhasis Biswas ◽  
Vishal Verma ◽  
James J. Schauer ◽  
Flemming R. Cassee ◽  
Arthur K. Cho ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Emission Control ◽  
Heavy Duty ◽  
Oxidative Potential ◽  
Control Technologies ◽  
Heavy Duty Vehicles

Fuel Quality Effects on Particulate Matter Emissions from Light- and Heavy-Duty Diesel Engines

1994 ◽  
Author(s):  
C. J. J. Den Ouden ◽  
R. H. Clark ◽  
L. T. Cowley ◽  
R. J. Stradling ◽  
W. W. Lange ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Diesel Engines ◽  
Fuel Quality ◽  
Heavy Duty ◽  
Particulate Matter Emissions ◽  
Heavy Duty Diesel

scholarly journals The analysis of the influence of stabilization conditions of working filters on the sample mass of diesel particulates

2012 ◽  
Vol 148 (1) ◽  
pp. 48-52
Author(s):  
Andrey POLIVYANCHUK ◽  
Oleg IGNATOV
Keyword(s):  
Particulate Matter ◽  
Measurement Error ◽  
Measurement Uncertainty ◽  
Diesel Engines ◽  
Final Part ◽  
Heavy Duty ◽  
Gravimetric Measurement ◽  
Sample Mass ◽  
Particulate Matter Emission ◽  
Passenger Vehicles

The paper presents the influence of the conditioning of filters used in the gravimetric measurement of particulate matter emission on the mass of the particles. The influence of the time of filter conditioning on the obtained results as well as the influence of the temperature of the sample before the filtering on the measurement uncertainty have been subjected to analysis. In the further part the influence of the ranges of temperatures of the filter conditioning on the mass of the PM sample have been determined as per the standardization for the tests of diesel engines fitted in passenger vehicles, heavy-duty vehicles and buses (regulation R-83 and R-49 respectively). In the final part recommendations have been formulated that allow a reduction of the measurement error.

Minimizing Real Driving Emissions of Heavy-Duty Vehicles - Exhaust Systems and Legislation

2019 ◽  
Vol 6 (1) ◽  
pp. 17-24
Author(s):  
Christian von Pyschow ◽  
Andreas Geißelmann ◽  
Christian Beidl
Keyword(s):  
Heavy Duty ◽  
Heavy Duty Vehicles ◽  
Exhaust Systems

Integrated design of working fluid and organic Rankine cycle utilizing transient exhaust gases of heavy-duty vehicles

2019 ◽  
Vol 255 ◽  
pp. 113207 ◽  
Author(s):  
Johannes Schilling ◽  
Katharina Eichler ◽  
Benedikt Kölsch ◽  
Stefan Pischinger ◽  
André Bardow
Keyword(s):  
Integrated Design ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Heavy Duty ◽  
Exhaust Gases ◽  
Heavy Duty Vehicles

scholarly journals Increase of High-Speed Qualities And Economic Efficiency of Use Systems of Ecological Diagnostics Diesel Engines-Microtunnels

2018 ◽  
Keyword(s):  
Particulate Matter ◽  
Economic Efficiency ◽  
Diesel Engines ◽  
High Speed ◽  
Power Plants ◽  
Experimental Studies ◽  
Environmental Testing ◽  
Exhaust Gases ◽  
Particulate Matter Emissions ◽  
Analysis And Synthesis

Purpose. Reducing the duration and cost of procedures for environmental diagnostics of diesel power plants by increasing the speed of measurements of normalizedРM index – average operating emissions of particulate matters with exhaust gases of diesel engines. Methods. Analysis and synthesis of information, mathematical modeling, experimental studies, calculation experiment. Results.In accordance with the requirements of the international standard ISO 8178, a method of accelerated measurement (МАМ) of the PMindex is proposed, which is characterized by the maximum allowable sample filtration rate and the minimum allowable masses of particulate matter in the filters, the use of which can significantly improve the economic efficiency of applying microtunnels: with single- and multi-filter sampling methods - in 3,1 ... 4,1 times and in 5,3 ... 7,1 times, respectively. Conclusions. Compared to the most common methods of control of particulate matter emissions that are realized in mini and microtunnels of Perkins, AVL, Mitsubishicompanies, they are characterized by higher speed and economic efficiency of use - indicators that are of great importance in testing high-power diesel engines –locomotive diesel, ships and others. It is substantiated that the use of МАМ allows to shorten the duration and cost of environmental testing of mainline diesel engines - 2TE116 and shunting - TEM-2 locomotives: certification tests - by 9 ... 28%, which is 0.2 ... 0.7 h and 0, 8 ... 1,5 thousand UAH; research tests - 43 ... 53%, which is 1.7 ... 3.0 h and 4.0 ... 7.5 thousand UAH. With the reduction of the actual emission levels of particulate matter with the exhaust gases of the diesel engine, the efficiency of the use of МАМ increases.

Sign in / Sign up

Export Citation Format

Share Document