NOx and N2O formation in HCCI engines

Amnéus, Per; Mauß, Fabian; Kraft, Markus; Vressner, Andreas; Johansson, Bengt

doi:10.4271/2005-01-0126

Cited by 41 publications

(22 citation statements)

References 6 publications

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“…For simplicity, no correction is made for the spray/wall interaction that occurs at long axial distances. At each axial distance from the injector, the relative air/fuel ratio can be calculated: where the mass flow rate of fuel at any axial location in the spray is the injected mass flow rate calculated by Equation 4. The stoichiometric air/fuel ratio is easily calculated if the species concentrations of the cylinder gas are known.…”

Section: Premixed Combustionmentioning

confidence: 99%

A Predictive Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion

Andersson

Johansson

Hultqvist

et al. 2006

SAE Technical Paper Series

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A previously presented robust and fast diagnostic NOx model was modified into a predictive model. This was done by using simple yet physically-based models for fuel injection, ignition delay, premixed heat release rate and diffusion combustion heat release rate.The model can be used both for traditional high temperature combustion and for high-EGR low temperature combustion.It was possible to maintain a high accuracy and calculation speed of the NOx model itself. The root mean square of the relative model error is 16 % and the calculation speed is around one second on a PC. Combustion characteristics such as ignition delay, CA50 and the general shape of the heat release rate are well predicted by the combustion model. The model is aimed at real time NOx calculation and optimization in a vehicle on the road.

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Section: Premixed Combustionmentioning

confidence: 99%

A Predictive Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion

Andersson

Johansson

Hultqvist

et al. 2006

SAE Technical Paper Series

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“…This variation in the effect of hydrogen enrichment on NO x emissions at different CA50s might be caused by the difference in NO x formation mechanisms. At a retarded CA50 (lower compression ratio), NO x formation in an HCCI engine is primarily due to the N 2 O intermediate mechanism and the contribution of the thermal mechanism is negligible [40,41]. For the N 2 O intermediate mechanism of NO x formation, the effect of temperature variation is relatively weak.…”

Section: Emission Characteristicsmentioning

confidence: 99%

An experimental study on the effect of hydrogen enrichment on diesel fueled HCCI combustion

Guo

Hosseini

Neill

et al. 2011

International Journal of Hydrogen Energy

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“…When weight transfer is bigger ( figure 3(b)) at 4000 rpm an unusual phenomena can be observed; the CO 2 and CO concentrations diminish, the oxidation of nitrogen and sulfur compounds to NO x and SO 2 , seems to be favored. At higher temperatures the Zeldovich mechanism could be dominant in chemical reactions giving preference to the NOx formation [15]. For the SO 2 formation it is shown that the increase in temperature corresponds to a decrease of equilibrium constant values as result of reactions in direction of the reactants formation [16].…”

Section: Motor Emissions Characterizationmentioning

confidence: 99%

Removal of main exhaust gases of vehicles by a double dielectric barrier discharge

Pacheco¹,

Alva²,

Valdivia³

et al. 2012

J. Phys.: Conf. Ser.

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Removal of main exhaust gases of vehicles by a double dielectric barrier discharge Abstract. Because the health effects and their contribution to climate change, the emissions of toxic gases are becoming more controlled. In order to improve the diminution of toxic gases to the atmosphere, several techniques have been developed; here it will be focus only to automotive emissions. This work deals about the treatment of toxic gases emitted from vehicles by a non-thermal plasma. Several tests were done in a 4-cylinder 2002/Z16SE motor to characterize the vehicle emissions. With these results gas mixture simulating the exhaust gases vehicles, was used in experiments at different conditions employing a double dielectric barrier reactor for their treatment. The removal efficiencies superior to 90% show the competence of the non-thermal plasma reactor to treat these gases. Experimental results are explained with the aid of a simple chemical model that suggests a possible mechanism of degradation of toxic gases. The plasma reactor employed could works at 12V supplied without difficulty by a vehicle battery.

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NOx and N2O formation in HCCI engines

Cited by 41 publications

References 6 publications

A Predictive Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion

A Predictive Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion

An experimental study on the effect of hydrogen enrichment on diesel fueled HCCI combustion

Removal of main exhaust gases of vehicles by a double dielectric barrier discharge

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