Combustion System Parameters and Their Effect Upon Diesel Engine Exhaust Emissions

Pischinger, Rudolf; Cartellieri, Wolfgang

doi:10.4271/720756

Cited by 23 publications

(5 citation statements)

References 5 publications

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“…This convention was also kept here and the comparison was attempted using the same load range of 50%−80% of each full load. The multiple diagrams of Figure show that, as it is typically the case, , the IDI engine had lower unburned hydrocarbon emissions and also lower NO x and CO emissions. Of course, if the comparison had been made on the grounds of the same maximum smoke values, the result would have been proved still better for the IDI engine.…”

Section: Resultsmentioning

confidence: 61%

“…Again, the freezing of NO in the expansion stroke is evident, because of the respective effect of chemical kinetics, whereas the increase of NO concentration with load is due to the corresponding temperature increases, with the calculated exhaust values being close to the measured values. Note that the model captures correctly the decrease of NO with increasing speed for the same load, at least inside the range examined, a fact that is attributed to the prevailing influence of the dynamic injection timing decreasing as speed increases. , Note that, although the exhaust NO x (i.e., NO + NO 2 ) emissions are measured, the NO emission is calculated by the model and compared with experimental values. This type of comparison is certainly acceptable, because the NO x species emitted by reciprocating piston internal combustion engines are almost completely dominated by NO…”

Section: Resultsmentioning

confidence: 66%

“…At most power settings, the soot emissions from JP-8 were higher. In contrast to the DI engine, the IDI engine showed NO x emissions decreasing with load as is known in the mid- to high-load range, , whereas mixed results were obtained, relative to engine speed (NO x mostly increased). The aforementioned decrease of NO concentration with load in the high-load range is due to the fact that NO is formed mainly in the pre-chamber .…”

Section: Resultsmentioning

confidence: 67%

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Comparative Environmental Evaluation of JP-8 and Diesel Fuels Burned in Direct Injection (DI) or Indirect Injection (IDI) Diesel Engines and in a Laboratory Furnace

et al. 2004

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In recent years, NATO and U.S. military forces have decided to implement a single fuel (JP-8) for all land-based military aircraft, vehicles, and equipment during war and peace times. This is referred to as the single fuel forward concept. However, possible environmental pollution problems have been identified in the process of implementing this single fuel concept. This work presents data on the operational and, especially, environmental evaluation of the JP-8 fuel that is burned in diesel engines and furnaces. The investigation is conducted in a comparative manner between the JP-8 fuel and the proverbial Diesel Oil No. 2, which is being substituted. The two fuels were burned under identical conditions in disparate types of combustors, including direct injection (DI) and indirect injection (IDI) diesel engines as well as a laminar-flow muffle furnace. The primary goal was to contrast the emissions of the two fuels, because JP-8 is a substitute for diesel oil in military applications, such as engines of ground vehicles and power generators, as well as other burners. Regulated emissions of CO, particulate matter (soot), oxides of nitrogen, and total unburned hydrocarbons have been examined. In the case of the combustion of the two fuels in the furnace, unregulated organic compounds have also been monitored. Moreover, the operational behaviors of the two fuels in the engines have been discussed. Results demonstrated that, for both fuels, the magnitude of the emissions, as well as the trends with operating conditions, were influenced by the type of combustor. However, the emissions from the two fuels, when burned in the same combustor, were comparable overall, both qualitatively and quantitatively.

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 67%

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Comparative Environmental Evaluation of JP-8 and Diesel Fuels Burned in Direct Injection (DI) or Indirect Injection (IDI) Diesel Engines and in a Laboratory Furnace

et al. 2004

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“…This is because the increase in the ambient temperature will lead to a drop in the air density, which is directly proportional to the air mass flow hence the brake power will decrease. The drop in the density is small, so this will lead to small decrease in the brake power [23][24][25][26][27]. Figure 6 shows the variation of brake power ratio (compact over conventional) with ambient temperature at full load.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Comparison of performance of compact chamber spark-ignition engine with conventional S.I. engine

Najjar

Al-Haddad

2011

Int. J. Energy Res.

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SUMMARYThis paper deals with the compact chamber engine in which a bowl-like space in the piston or head of the cylinder is added to cause swirling of the air-fuel mixture. This causes a change in performance from the conventional spark ignition engine.In this work, the operating variables considered are the engine speed, equivalence ratio, inlet pressure and temperature and exhaust pressure.A computer program is specially devised to calculate performance at design and off design operation conditions. The compact chamber achieves an increase in volumetric efficiency of 5%. The brake efficiency is 28.5%, whereas for conventional SI engine is 23%, with an increase of 20%. The brake power for the compact chamber engine is 39 kW, whereas for the conventional engine is 35 kW, an increase of 10%. Hence, the reduction in the brakespecific fuel consumption is about 20%.

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“…20 gives the peak motoring temperature as a color contour against CR and IAT for mode A50. An increase in both CR and IAT results in an increase in peak temperature motoring.…”

mentioning

confidence: 99%

Design, Build, and Analysis of a Compressed Natural Gas Direct Injection Compression Ignition Single Cylinder Research Engine

Miller¹

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Combustion System Parameters and Their Effect Upon Diesel Engine Exhaust Emissions

Cited by 23 publications

References 5 publications

Comparative Environmental Evaluation of JP-8 and Diesel Fuels Burned in Direct Injection (DI) or Indirect Injection (IDI) Diesel Engines and in a Laboratory Furnace

Comparative Environmental Evaluation of JP-8 and Diesel Fuels Burned in Direct Injection (DI) or Indirect Injection (IDI) Diesel Engines and in a Laboratory Furnace

Comparison of performance of compact chamber spark-ignition engine with conventional S.I. engine

Design, Build, and Analysis of a Compressed Natural Gas Direct Injection Compression Ignition Single Cylinder Research Engine

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