Optical Diagnostics of the Pollutant Formation in a CI Engine Operating with Diesel Fuel Blends

Experimental investigation of particle emissions under different EGR ratios on a diesel engine fueled by blends of diesel/gasoline/n-butanol

“…Their results showed that an increase in the inlet oxygen concentration leads to a decrease in soot emissions, and revealed that the joint effect of the higher resistance to auto ignition and the higher volatility of n-butanol blends improves emissions compared to neat diesel with a small drawback on fuel consumption. Although many researchers [22][23][24][25][26][27]15,28,29] have investigated the engine performance and the exhaust emissions in diesel engines fueled with diesel-n-butanol blends, and some recent research work has already been conducted to investigate the influence of butanol-diesel blends on the particle emission characteristics [30][31][32][33], most of the research on emissions of diesel/gasoline/nbutanol blended fuel is focused on NO x , soot, CO and HC (unburned hydrocarbon) emissions. In our previous work [34], we mainly investigated the combustion characteristics (ignition delay, CA50 (the crank angle location for 50% cumulative heat release) and maximum pressure rise rate), the economic performance, the common emissions (NO x , soot, CO and HC), and simply characterized the particle concentration in the emissions of diesel/gasoline/nbutanol blends at different EGR ratios.…”

The Impact of Injector Hole Diameter on Spray Behaviour for Butanol-Diesel Blends

“…CI engines' performance and emissions are very sensitive to fuel spray behaviour (controlled by the nozzle geometry; the nozzle position in engine cylinder; and the injection method, such as direct injection or dual injection), which influence fuel-air surface area contact and mixing rate. Visualisation techniques are sometimes applied in engine configurations with optical access [14,15] (using either a modified or a specially-built engine). Alternatively, a constant volume vessel (CVV) can be used at either similar conditions to real engines [16][17][18][19] or at atmospheric conditions [20,21] because design and fabrication of an engine with an optical window is a costly and complex option [22][23][24].…”

UV-Visible Emission Spectroscopy of the Combustion Process in a Common Rail Cl Engine Fulled with N-Butanol - Diesel Blends

“…The engine used in the work is an external high swirl optically accessed combustion bowl connected to a single cylinder 2-stroke high pressure common rail compression ignition engine. The main engine specifications are reported in [4]. The external combustion bowl is suitable to stabilize, at the end of compression stroke, swirl conditions to reproduce the fluid dynamic environment similar to those within a real direct injection diesel engine.…”