Characterization of Ultrafine Particle Emissions from a Heavy Duty CNG Engine through Endurance Tests

2017 ◽  
Author(s):  
Vishnu Vijayakumar ◽  
P. Sakthivel ◽  
Bhuvenesh Tyagi ◽  
Amardeep Singh ◽  
Reji Mathai ◽  
...  
Keyword(s):  
Ultrafine Particle ◽  
Heavy Duty ◽  
Particle Emissions ◽  
Endurance Tests ◽  
Cng Engine

The Effect of Fuel Type and Aftertreatment Method on Ultrafine Particle Emissions from a Heavy-Duty Diesel Engine

2007 ◽  
Vol 41 (11) ◽  
pp. 1029-1039 ◽  
Author(s):  
Brian P. Frank ◽  
Shida Tang ◽  
Thomas Lanni ◽  
Jillian Grygas ◽  
Greg Rideout ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Ultrafine Particle ◽  
Fuel Type ◽  
Heavy Duty ◽  
Particle Emissions ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

Effect of Advanced Aftertreatment for PM and NOxReduction on Heavy-Duty Diesel Engine Ultrafine Particle Emissions

2011 ◽  
Vol 45 (6) ◽  
pp. 2413-2419 ◽  
Author(s):  
Jorn Dinh Herner ◽  
Shaohua Hu ◽  
William H. Robertson ◽  
Tao Huai ◽  
M.-C. Oliver Chang ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Ultrafine Particle ◽  
Heavy Duty ◽  
Particle Emissions ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

179. Characterization of Fine Particle Emissions in an Engine Plant

2006 ◽  
Author(s):  
W. Heitbrink ◽  
T. Peters ◽  
D. Evans ◽  
T. Slavin
Keyword(s):  
Fine Particle ◽  
Particle Emissions

Potential of the Variable Valve Actuation (VVA) Strategy on a Heavy Duty CNG Engine

2014 ◽  
Author(s):  
Mirko Baratta ◽  
Roberto Finesso ◽  
Daniela Misul ◽  
Ezio Spessa ◽  
Yifei Tong ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Operating Conditions ◽  
Intake Valve ◽  
Heavy Duty ◽  
Engine Emissions ◽  
Variable Valve Actuation ◽  
Cng Engine ◽  
Variable Valve ◽  
Working Point ◽  
Valve Actuation

The environmental concerns officially aroused in 1970s made the control of the engine emissions a major issue for the automotive industry. The corresponding reduction in fuel consumption has become a challenge so as to meet the current and future emission legislations. Given the increasing interest retained by the optimal use of a Variable Valve Actuation (VVA) technology, the present paper investigates into the potentials of combining the VVA solution to CNG fuelling. Experiments and simulations were carried out on a heavy duty 6-cylinders CNG engine equipped with a turbocharger displaying a twin-entry waste-gate-controlled turbine. The analysis aimed at exploring the potentials of the Early Intake Valve Closure (EIVC) mode and to identify advanced solutions for the combustion management as well as for the turbo-matching. The engine model was developed within the GT-Power environment and was finely tuned to reproduce the experimental readings under steady state operations. The 0D-1D model was hence run to reproduce the engine operating conditions at different speeds and loads and to highlight the effect of the VVA on the engine performance as well as on the fuel consumption and engine emissions. Pumping losses proved to reduce to a great extent, thus decreasing the brake specific fuel consumption (BSFC) with respect to the throttled engine. The exhaust temperature at the turbine inlet was kept to an almost constant value and minor variations were allowed. This was meant to avoid an excessive worsening in the TWC working conditions, as well as deterioration in the turbocharger performance during load transients. The numerical results also proved that full load torque increases can be achieved by reducing the spark advance so that a higher enthalpy is delivered to the turbocharger. Similar torque levels were also obtained by means of Early Intake Valve Closing strategy. For the latter case, negligible penalties in the fuel consumption were detected. Moreover, for a given combustion phasing, the IVC angle directly controls the mass-flow rate and thus the torque. On the other hand, a slight dependence on the combustion phasing can be detected at part load. Finally, the simulations assessed for almost constant fuel consumption for a wide range of IVC and SA values. Specific attention was also paid to the turbocharger group functioning and to its correct matching to the engine working point. The simulations showed that the working point on the compressor map can be optimized by properly setting the spark advance (SA) as referred to the adopted intake-valve closing angle. It is anyhow worth observing that the engine high loads set a constraint deriving from the need to meet the limits on the peak firing pressure (PFP), thus limiting the possibility to optimize the working point once the turbo-matching is defined.

scholarly journals Characterization of particle emissions and fate of nanomaterials during incineration

2014 ◽  
Vol 1 (2) ◽  
pp. 133-143 ◽  
Author(s):  
Eric P. Vejerano ◽  
Elena C. Leon ◽  
Amara L. Holder ◽  
Linsey C. Marr
Keyword(s):  
End Of Life ◽  
Particle Emissions ◽  
End Of Life Treatment

Incineration as end-of-life treatment for nanowaste has perhaps the greatest potential for transforming nanomaterials in the environment.

Particle emissions from mobile sources: Discussion on ultrafine particle emissions and definition

2021 ◽  
pp. 105881
Author(s):  
David Kittelson ◽  
Imad Khalek ◽  
Joseph McDonald ◽  
Jeffrey Stevens ◽  
Robert Giannelli
Keyword(s):  
Ultrafine Particle ◽  
Particle Emissions ◽  
Mobile Sources
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