Combustion and emission characteristics of a turbo-charged common rail diesel engine fuelled with diesel-biodiesel-DEE blends

Abstract

The combustion and emission characteristics of a turbo-charged, common rail diesel engine fuelled with diesel-biodiesel-DEE blends were investigated. The study reports that the brake-specific fuel consumption of dieselbiodiesel-DEE blends increases with increase of oxygenated fuel fractions in the blends. Brake thermal efficiency shows little variation when operating on different dieselbiodiesel-DEE blends. At a low load, the NO x emission of the diesel-biodiesel-DEE blends exhibits little variation in comparison with the biodiesel fraction. The NO x emission slightly increases with increase in the biodiesel fraction in diesel-biodiesel-DEE blends at medium load. However, the NO x emission increases remarkably with increase of the biodiesel fraction at high load. Particle mass concentration decreases significantly with increase of the oxygenated-fuels fraction at all engine speeds and loads; particle number concentration decreases remarkably with increase of the oxygenated-fuels fraction. HC and CO emissions decrease with increasing oxygenated-fuels fraction in these blends.

Influence of fuel-borne oxygen on European Stationary Cycle: Diesel engine performance and emissions with a special emphasis on particulate and NO emissions

“…Nabi et al[1] also reported lower PN emissions with oxygenated fuels. The current investigation is in good agreement with those in references[1,36,39,40].…”

“…Figures 9(a-c) represent the particle number (PN) size distributions for three different speeds at 25% of full It is interesting to note that all oxygenated blends consistently reduce PN emissions for all three speeds. It is reported that the PN reduction is due to the presence of fuel-borne oxygen, less aromatic and sulphur in the oxygenated blends[39]. Liang et al did an experiment with oxygen enrichment and water-diesel emulsion to investigate the effect of oxygen enriched combustion[40] and reported lower PN emissions with oxygen enrichment at accumulation mode.…”

Effect of Oxygenated Functional Groups in Essential Oils on Diesel Engine Performance, Emissions, and Combustion Characteristics

“…Similar to PM emissions, at all loads PN emissions were also reduced for essential oil blends. Addition of oxygen and reduced carbon content in the blends could result in primary particles oxidation and thus reduce particle number emissions. , Compared to neat diesel, for eucalyptus and tea tree oil blends the PN emission reduced by 20–39% and 7–31%, respectively.…”

“…Addition of oxygen and reduced carbon content in the blends could result in primary particles oxidation and thus reduce particle number emissions. 35,36 Compared to neat diesel, for eucalyptus and tea tree oil blends the PN emission reduced by 20−39% and 7−31%, respectively. Figure 11 represents the distribution of particle size of the tested blends.…”

Effect of exhaust gas recirculation and charge inlet temperature on performance, combustion, and emission characteristics of diesel engine with bael oil blends

“…22 By rising CIT, the rate of cylinder pressure becomes higher during the initial stage of combustion and the peak pressure occurs slightly past. 39 By the growing of EGR rate, the cylinder pressure decreases due to the long ignition delay and moving the combustion process toward the expansion stroke. 19 The increased EGR rate leads to delay in ignition, therefore the main burning phase moves toward the power stroke.…”