scholarly journals Formulation of a task to control of harmful exhaust emissions from compression ignition engine

2017 ◽  
Vol 170 (3) ◽  
pp. 171-175
Author(s):  
Jacek NOWAKOWSKI ◽  
Krzysztof BRZOZOWSKI ◽  
Tomasz KNEFEL
Keyword(s):  
Nitrogen Oxides ◽  
Exhaust Emissions ◽  
Common Rail ◽  
Experimental Measurements ◽  
Compression Ignition ◽  
Control Task ◽  
Common Rail System ◽  
Compression Ignition Engine ◽  
Working Cycle ◽  
Ci Engine

This paper presents a possibility of control a harmful exhaust emissions from compression ignition engine based on computationally efficiently model of the working cycle a compression ignition engine. Parameters of the model are identified on the basis of experimental measurements carried out for a CI engine with Common Rail system. In this study is considered the control task aimed at minimization of nitrogen oxides emission for a fixed operating point of the engine.

Effect of Cryogenic Intake Air Temperature on the In-Cylinder Temperature and Formation of Exhaust Emissions in a Compression Ignition Engine

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Se Hun Min ◽  
Hyun Kyu Suh ◽  
Seongin Jo ◽  
Suhan Park
Keyword(s):  
Air Temperature ◽  
Mass Fraction ◽  
Equivalence Ratio ◽  
Exhaust Emissions ◽  
Compression Ignition ◽  
Cylinder Pressure ◽  
Compression Ignition Engine ◽  
Rate Of Heat Release ◽  
Ci Engine ◽  
Combustion Behaviors

The objective of this study is to numerically investigate the effect of cryogenic intake air temperature on the in-cylinder temperature and formation of exhaust emissions in a CI engine. The experimental setup was consisted of a single-cylinder diesel engine. The intake air temperature was varied from 18 °C to 40 °C, which was controlled by cooler and heater. Submodels were applied for the simulations of physical/chemical phenomenon of spray and combustion behaviors. The intake air temperature in numerical condition was varied from −18 °C to 18 °C. The numerical results were validated with experimental results for the reliability of this work. The results of this work were compared in terms of cylinder pressure, rate of heat release (ROHR), indicated specific nitrogen oxide (ISNO), indicated specific carbon monoxide (ISCO), ignition delay, in-cylinder temperature distributions, equivalence ratio distributions, NO mass fraction, and CO mass fraction. When the intake air temperature was decreased in steps of 9 °C, the cylinder temperature and cylinder pressure were decreased in steps of about 14.5 °C and 0.05 MPa, respectively. In all cases, the area where the NO formed in the cylinder was identified with the area of the high equivalence ratio and temperature in the cylinder. The amount of CO generation shows the similar distributions in the cylinder according to the intake air temperature conditions. However, the oxidation rate of formed CO under the low intake air temperature was lower than those of the high intake air temperature.

scholarly journals Exhaust emission characteristics of a gardener compression ignition engine fuelled with rapeseed methyl ester and fossil diesel

2020 ◽  
Vol 39 (3) ◽  
pp. 752-760
Author(s):  
H.A. Dandajeh ◽  
Y.S. Sanusi ◽  
T.O. Ahmadu
Keyword(s):  
Engine Speed ◽  
Exhaust Emissions ◽  
Exhaust Emission ◽  
Emission Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Exhaust Temperature ◽  
Brake Mean Effective Pressure ◽  
Ci Engine ◽  
Rapeseed Methyl Ester

This paper presents an experimental investigation into the exhaust emissions characteristics of a gardener Compression Ignition (CI) Engine fuelled with rapeseed methyl Esther (RME) and fossil diesel under lean equivalence ratios (0.2≤ φ ≤0.8). The experiments were carried out at engine speeds of 750 and 1250 rpm under five different loads. The experimental results showed that NOx and CO2 emissions increased while emissions of HC, O2 and CO decreased with increasing equivalence ratio, exhaust temperature, brake mean effective pressure and specific fuel consumption. All exhaust emissions were found to decrease with increasing engine speed from 750 to 1250 rpm. There was reduction in exhaust emissions of RME over fossil diesel by 0.06% for O2, 84% for CO and 4.7% for CO2 at 750rpm. At higher speed of 1250rpm however, RME was observed having higher NOx and CO2 but relatively lower O2 and CO than the fossil diesel. Keywords— Exhaust Emission, Compression ignition engine, rapeseed methyl Esther, engine speed, fossil diesel

Analysis of temperature and altitude effects on the Global Energy Balance during WLTC

2021 ◽  
pp. 146808742110342
Author(s):  
Francisco Payri ◽  
Jaime Martín ◽  
Francisco José Arnau ◽  
Sushma Artham
Keyword(s):  
Energy Balance ◽  
Ambient Temperature ◽  
Fuel Consumption ◽  
Experimental Measurements ◽  
Compression Ignition ◽  
Oil Viscosity ◽  
Compression Ignition Engine ◽  
Global Energy ◽  
Global Energy Balance ◽  
L Compression

In this work, the Global Energy Balance (GEB) of a 1.6 L compression ignition engine is analyzed during WLTC using a combination of experimental measurements and simulations, by means of a Virtual Engine. The energy split considers all the relevant energy terms at two starting temperatures (20°C and 7°C) and two altitudes (0 and 1000 m). It is shown that reducing ambient temperature from 20°C to −7°C decreases brake efficiency by 1% and increases fuel consumption by 4%, mainly because of the higher friction due to the higher oil viscosity, while the effect of increasing altitude 1000 m decreases brake efficiency by 0.8% and increases fuel consumption by 2.5% in the WLTC mainly due to the change in pumping. In addition, GEB shows that ambient temperature is affecting exhaust enthalpy by 4.5%, heat rejection to coolant by 2%, and heat accumulated in the block by 2.5%, while altitude does not show any remarkable variations other than pumping and break power.

scholarly journals Chemiluminescence analysis of the effect of butanol-diesel fuel blends on the spray-combustion process in an experimental common rail diesel engine

2015 ◽  
Vol 19 (6) ◽  
pp. 1943-1957
Author(s):  
Simona Merola ◽  
Luca Marchitto ◽  
Cinzia Tornatore ◽  
Gerardo Valentino
Keyword(s):  
Diesel Fuel ◽  
Flame Temperature ◽  
Combustion Process ◽  
Injection Pressure ◽  
Common Rail ◽  
Pilot Injection ◽  
Soot Emission ◽  
Compression Ignition Engine ◽  
Working Cycle ◽  
Main Injection

Combustion process was studied from the injection until the late combustion phase in an high swirl optically accessible combustion bowl connected to a single cylinder 2-stroke high pressure common rail compression ignition engine. Commercial diesel and blends of diesel and n-butanol (20%: BU20 and 40%: BU40) were used for the experiments. A pilot plus main injection strategy was investigated fixing the injection pressure and fuel mass injected per stroke. Two main injection timings and different pilot-main dwell times were explored achieving for any strategy a mixing controlled combustion. Advancing the main injection start, an increase in net engine working cycle (>40%) together with a strong smoke number decrease (>80%) and NOx concentration increase (@50%) were measured for all pilot injection timings. Compared to diesel fuel, butanol induced a decrease in soot emission and an increase in net engine working area when butanol ratio increased in the blend. A noticeable increase in NOx was detected at the exhaust for BU40 with a slight effect of the dwell-time. Spectroscopic investigations confirmed the delayed auto-ignition (~60 ms) of the pilot injection for BU40 compared to diesel. The spectral features for the different fuels were comparable at the start of combustion process, but they evolved in different ways. Broadband signal caused by soot emission, was lower for BU40 than diesel. Different balance of the bands at 309 and 282 nm, due to different OH transitions, were detected between the two fuels. The ratio of these intensities was used to follow flame temperature evolution.

Preparation of Jatropha Biodiesel Using Hydrotalcite Catalyst and its Performance on Diesel Engine

2011 ◽  
Vol 110-116 ◽  
pp. 1368-1373 ◽  
Author(s):  
Amar P. Pandhare ◽  
S. G. Wagholikar ◽  
R. B. Jadhav Sachin Musale ◽  
A. S. Padalkar
Keyword(s):  
Diesel Engine ◽  
Thermal Efficiency ◽  
Specific Energy Consumption ◽  
Exhaust Emissions ◽  
Effect Of Temperature ◽  
Compression Ignition ◽  
Performance Parameters ◽  
Jatropha Oil ◽  
Compression Ignition Engine ◽  
Ci Engines

The heterogeneous catalyst are environment friendly and render the process simplified. A wide variety of solid bases have been examined for this process. The present work reports the use of hydrotalcite catalyst for the synthesis of Biodiesel from jatropha oil. An experimental investigation has been carried out to analyze the performance and emission characteristics of a compression ignition engine fuelled with Jatropha oil and its blends (10%, 20%, 40%, 50%, and 60 % ) with mineral diesel. The effect of temperature on the viscosity of Jatropha oil has also been investigated. A series of engine tests, have been conducted using each of the above fuel blends for comparative performance evaluation. The performance parameters evaluated include thermal efficiency, brake specific fuel consumption (BSFC), brake specific energy consumption (BSEC), and exhaust gas temperature whereas exhaust emissions include mass emissions of CO, HC, NO. These parameters were evaluated in a single cylinder compression ignition diesel engine. The results of the experiment in each case were compared with baseline data of mineral diesel. Significant improvements have been observed in the performance parameters of the engine as well as exhaust emissions. The gaseous emissions of oxide of nitrogen from all blends are lower than mineral diesel at all engine loads. Jatropha oil blends with diesel (up to 50% v/v) can replace diesel for operating the CI engines giving lower emissions and improved engine performance. More over results indicated that B20 have closer performance to diesel and B100 have lower brake thermal efficiency mainly due to its high viscosity compared to diesel.

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