Open AccessThe study of cyclic variability at a n-butanol spark ignition engine fueled
Author(s) -
Cr Sandu,
Constantin Pană,
Niculae Negurescu,
Alexandru Cernat,
Dinu Fuiorescu,
R Georgescu,
Cristian Nuţu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/997/1/012132
Subject(s) - gasoline , butanol , n butanol , mean effective pressure , combustion , spark ignition engine , ignition system , thermal efficiency , methanol , fraction (chemistry) , chemistry , internal combustion engine , environmental science , materials science , waste management , ethanol , automotive engineering , thermodynamics , organic chemistry , engineering , compression ratio , physics
Alcohols such as ethanol, methanol and butanol have gained more attraction in recent years in the use of alternative fuels at the internal combustion engines (ICE) because of their good combustion properties. The use of the butanol-gasoline blends can lead to a decrease in greenhouse gases (CO 2 ) and pollutants such as unburnt hydrocarbons (HC), carbon monoxide (CO) but may increase nitrogen oxides (NO x ). An experimental study carried out on a spark ignition engine fueled with a n-butanol-gasoline blend (10% vol. butanol - 90% vol. gasoline) at an engine load χ=55%, speed of n=2500 rpm and different air excess ratios (λ). The objective of this paper is to determine the effects of n-butanol on combustion, specifically on the cyclic variability. So, the COV values for maximum pressure, indicated mean effective pressure and angles of mass fraction burned -10%, 50% and 90%- are presented The engine fueling with butanol-gasoline blend engine leads to the decrease of the cyclic variability and the COV values don’t exceed the recommended value. A great advantage of n-butanol use is the increase of the thermal efficiency due to the stable engine operation and at lean mixtures.