Diesel Engine - Combustion, Emissions and Condition Monitoring 2013
DOI: 10.5772/55729
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Cited by 15 publications
(14 citation statements)
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“…In other words, the removal efficiency of NO x drastically decreases with increasing A/F ratio from 14.7, i.e., with increasing O 2 concentration. On the other hand, diesel engines and lean‐burn gasoline engines have an advantage in fuel economy compared to the gasoline engines, and the use of these engines lowers the fuel consumption by up to 30% 5. However, the diesel and lean‐burn engines are operated at a high A/F ratio of 25–60, where the three‐way catalyst cannot decompose the NO x efficiently.…”
Section: Introductionmentioning
confidence: 99%
“…In other words, the removal efficiency of NO x drastically decreases with increasing A/F ratio from 14.7, i.e., with increasing O 2 concentration. On the other hand, diesel engines and lean‐burn gasoline engines have an advantage in fuel economy compared to the gasoline engines, and the use of these engines lowers the fuel consumption by up to 30% 5. However, the diesel and lean‐burn engines are operated at a high A/F ratio of 25–60, where the three‐way catalyst cannot decompose the NO x efficiently.…”
Section: Introductionmentioning
confidence: 99%
“…In Figure 1, the slurry viscosity almost holds constant at pH < 4.5, suggesting that the slurry viscosity is not sensitive to pH. In addition, Pereda-Ayo et al [29,30] revealed that at pH = 3.5-4, the alumina-based slurry presented an optimal state of uniformity and stabilization, and a high washcoat loading could be achieved. Nijhuis et al [22] reported that a pH of 3-4 could improve the slurry stabilization, while higher or lower pH increased the viscosity, resulting in unfavorable coating.…”
Section: Phmentioning
confidence: 89%
“…Oko stehiometrijske tačke (A/F=14,63) sve tri zagaĎujuće materije imaju visok stepen konverzije (>95%). MeĎutim, kada je mešavina bogata kiseonikom, kao što je u dizel motorima (A/F>20), konverzija NO x je manja [4]. ZagaĎujuće materije ponašaju se pojedinačno na sledeći način:…”
Section: Slika 8 Pozicioniranje Lambda Sonde (Levo) I Njen Uzdužni Punclassified
“…Odnos vazduha prema gorivu (A/F) u smeši benzinskog motora [4] Tokom radnog veka katalizatora moţe doći do:  zatrovanja površine katalizatora kada je konvertor izloţen supstancama koje prekrivaju aktivnu površinu (npr. olovo -katalizatori rade samo sa bezolovnim gorivom, fosfor -više se ne koristi u aditivima za motorno ulje, silikon iz zaptivača, sumpor i ugljenik iz goriva),  topljenja katalizatora kada velike količine nesagorelih HC doĎu u kontakt sa monolitom povećavajući radnu temperaturu na 800°C ili 1.000°C.…”
Section: Slikaunclassified