Experimental Investigations of Preheated Jatropha Oil Fuelled Direct Injection Compression Ignition Engine—Part 1: Performance, Emission, and Combustion Characteristics

2010 ◽  
Vol 7 (6) ◽  
pp. 102414 ◽  
Author(s):  
Avinash Kumar Agarwal ◽  
Atul Dhar ◽  
L. Honary ◽  
C. Conconi ◽  
S. W. Dean
Keyword(s):  
Direct Injection ◽  
Combustion Characteristics ◽  
Experimental Investigations ◽  
Compression Ignition ◽  
Jatropha Oil ◽  
Compression Ignition Engine ◽  
Engine Part

Parametric study of combustion characteristics in a direct-injection diesel homogeneous charge compression ignition engine with a low-pressurefuel injector

2005 ◽  
Vol 6 (3) ◽  
pp. 215-230 ◽  
Author(s):  
Y Ra ◽  
E J Hruby ◽  
R D Reitz
Keyword(s):  
Numerical Simulations ◽  
Diesel Fuel ◽  
Homogeneous Charge Compression Ignition ◽  
Direct Injection ◽  
Low Pressure ◽  
Combustion Characteristics ◽  
Compression Ignition ◽  
Fuel Injector ◽  
Compression Ignition Engine ◽  
Homogeneous Charge

Homogeneous charge compression ignition (HCCI) combustion is an alternative to current engine combustion systems and is used as a method to reduce emissions. It has the potential nearly to eliminate engine-out NOx emissions while producing diesel-like engine efficiencies, when a premixture of gas-phase fuel and air is burned spontaneously and entirely by an autoignition process. However, when direct injection is used for diesel fuel mixture preparation in engines, the complex in-cylinder flow field and limited mixing times may result in inhomogeneity of the charge. Thus, in order to minimize non-uniformity of the charge, early injection of the fuel is desirable. However, when fuel is injected during the intake or early compression stroke, the use of high-pressure injection is limited by the relatively low in-cylinder gas pressure because of spray impingement on the cylinder walls. Thus, it is also of interest to consider low-pressure injectors as an alternative. In the present paper, the parametric behaviour of the combustion characteristics in an HCCI engine operated with a low-pressure fuel injector were investigated through numerical simulations and engine experiments. Parameters including the start-of-injection (SOI) timing and exhaust gas recirculation were considered, and diesel and n-heptane fuels were used. The results show good agreement of behaviour trends between the experiments and the numerical simulations. With its lower vaporization rates, significant effects of the SOI timing and intake gas temperature were seen for diesel fuel due to the formation of wall films. The modelling results also explained the origin of high-temperature NO x-producing regions due to the effect of the gas density on the spray.

scholarly journals Combustion characteristics of compression ignition engine fuelled with rapeseed oil–diesel fuel–n-butanol blends

2021 ◽  
Vol 76 ◽  
pp. 17
Author(s):  
Jakub Čedík ◽  
Martin Pexa ◽  
Bohuslav Peterka ◽  
Miroslav Müller ◽  
Michal Holubek ◽  
...  
Keyword(s):  
Vegetable Oils ◽  
Diesel Fuel ◽  
Rapeseed Oil ◽  
Direct Injection ◽  
Combustion Characteristics ◽  
Solid Particles ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Fuel Blend ◽  
Fuel Blends

Liquid biofuels for compression ignition engines are often based on vegetable oils. In order to be used in compression ignition engine the vegetable oils have to be processed because of their high viscosity or it is also possible to use vegetable oils in fuel blends. In order to decrease the viscosity of the fuel blends containing crude vegetable oil the alcohol-based fuel admixtures can be used. The paper describes the effect of rapeseed oil–diesel fuel–n-butanol blends on combustion characteristics and solid particles production of turbocharged compression ignition engine. The 10% and 20% concentrations of n-butanol in the fuel blend were measured and analysed. The engine Zetor 1204, located in tractor Zetor Forterra 8641 with the power of 60kW and direct injection was used for the measurement. The engine was loaded through power take off shaft of the tractor using mobile dynamometer MAHA ZW500. The measurement was carried out in stabilized conditions at 20%, 60% and 100% engine load. The engine speed was kept at 1950 rpm. Tested fuel blends showed lower production of solid particles than diesel fuel and lower peak cylinder pressure and with increasing concentration of n-butanol in the fuel blend the ignition delay was prolonged and premixed phase of combustion was increased.

Time-Resolved Endoscopic Evaluation of Spatial Temperature and Soot Distribution in a Butanol-Diesel Blend Fuelled Direct Injection Compression Ignition Engine

2021 ◽  
pp. 1-34
Author(s):  
Avinash Kumar Agarwal ◽  
Yeshudas Jiotode ◽  
Nikhil Sharma
Keyword(s):  
Direct Injection ◽  
Experimental Investigations ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Nox Formation ◽  
Time Resolved ◽  
Endoscopic Images ◽  
Exhaust Gas Emission ◽  
Engine Endoscopy ◽  
Spatial Temperature

Abstract In-situ spatial soot and temperature distributions were investigated experimentally for B20 (20% v/v butanol and balance mineral diesel blend), vis-a-vis mineral diesel using endoscopic visualization. Endoscopy captured in-cylinder combustion images in a production-grade direct injection compression ignition (DICI) engine at varying engine operating points. A comparative combustion data analysis using pressure-crank angle history, and the captured endoscopic images was performed, and an attempt was made to correlate the results of these two experimental investigations. Combustion duration (CD) obtained from the endoscopic images was found to be relatively long compared to CD calculated from the thermodynamic analysis. The majority of the research on soot and NOx emitted from an engine using a raw exhaust gas emission analyser provides bulk, time-averaged, and cycle-averaged information about the pollutant formation. This investigation is unique wherein the spatial or time-resolved soot and NOx formation (Via spatial temperature distribution) is evaluated and the findings of this study support the research finding available in the open literature, which uses emission analyser. This study and the technique therein on deployment of engine endoscopy as an emerging optical technique is potentially useful to original automotive manufactures (OEM's) in designing more efficient engines to meet upcoming stringent emission norms.

Experimental investigation of performance and emissions characteristics of waste cooking oil biodiesel and n-butanol blends in a compression ignition engine

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 33863-33868 ◽  
Author(s):  
M. Jindal ◽  
P. Rosha ◽  
S. K. Mahla ◽  
A. Dhir
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Direct Injection ◽  
Waste Cooking Oil ◽  
Experimental Investigations ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Direct Injection Diesel Engine ◽  
Cooking Oil ◽  
Performance And Emissions

Experimental investigations were conducted to evaluate the effects of n-butanol in biodiesel–diesel blends on the performance and emissions characteristics of a constant speed, direct injection diesel engine.

Combustion characteristics and heat release analysis of a direct injection compression ignition engine fuelled with diesel—dimethyl carbonate blends

2003 ◽  
Vol 217 (7) ◽  
pp. 595-605 ◽  
Author(s):  
Z H Huang ◽  
D M Jiang ◽  
K Zeng ◽  
B Liu ◽  
Z L Yang
Keyword(s):  
Heat Release ◽  
Maximum Rate ◽  
Dimethyl Carbonate ◽  
Direct Injection ◽  
Pressure Rise ◽  
Combustion Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Increase With Increase ◽  
Combustion Duration

The combustion characteristics and heat release of a direct injection (DI) compression ignition engine fuelled with diesel-dimethyl carbonate blends were investigated on a compression ignition engine. The study showed that the premixed combustion is prolonged and the duration of the diffusive combustion is shortened with increase in the dimethyl carbonate (DMC) addition. For a specific brake mean effective pressure (b.m.e.p.), the maximum cylinder gas pressure, the maximum rate of pressure rise and the maximum rate of heat release increase with increase in the DMC addition at medium and high loads, while they exhibit less variation with the DMC addition at small load. Meanwhile, the maximum gas temperature decreases with increase in the DMC addition. The ignition delay increases while the rapid combustion duration and the total combustion duration show less variation with the DMC addition. The brake specific fuel consumption (b.s.f.c.) increases while the diesel equivalent b.s.f.c. decreases and the thermal efficiency increases with increase in the DMC addition. The CO and smoke decrease with increase in the DMC addition, and NOx does not increase with increase in DMC.

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