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Experimental investigation of the effect of a B70 biodiesel.pdf
Experimental investigation of the effect of a B70 biodiesel blend on a
common rail, passenger car Diesel engine
Dimitris Tziourtzioumis, Loucas Demetriades, Olympia Zogou, Tassos Stamatelos
LTTE, Mechanical Engineering Department, Univesity of Thessaly
Pedion Areos, GR-383 34 Volos
ABSTRACT
The results of engine bench tests of a 2.0 liter, common rail, high pressure injection passenger car Diesel
engine fuelled by B70 biodiesel blend are compared to the respective results of baseline tests with standard EN 590
Diesel fuel. Engine performance and CO, THC and NOx emissions were measured. Also, indicative particulate
sampling was made with a simplified, undiluted exhaust sampler. Aim of this study was to better understand how
the Engine Control Unit (ECU) responds to the different fuel quality. A series of characteristic operation points for
engine testing is selected to better serve this purpose. Data acquisition of the engine ECU variables was made
through the INCA software. Also, additional data acquisition based on external sensors was carried out by means of
Labview software. Τhe results enhance our understanding of the engine ECU behavior with the B70 biodiesel blend.
Also, they are compared to what is known from the related literature for the behavior of common rail Diesel
engines with biodiesel blends.
NOMENCLATURE
A/F Air to Fuel ratio
(A/F)st Stoichiometric Air to Fuel ratio
bmep Brake mean effective pressure [bar]
3
bsp Fuel delivery per stroke (fuel consumption) [mm /st.]
bsfc Brake specific fuel consumpt
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