The Combustion and Exhaust Gas Emission of a Direct Injection Compression Ignition Engine Using Physic Nut Oil (Jatropha Curcas L.oil)

2007 ◽  
Author(s):  
Iman K. Reksowardojo ◽  
Tirto P. Brodjonegoro ◽  
W. Arismunandar ◽  
R. Sopheak ◽  
H. Ogawa
Keyword(s):  
Jatropha Curcas ◽  
Direct Injection ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Physic Nut ◽  
Gas Emission ◽  
Compression Ignition Engine ◽  
Exhaust Gas Emission

Assessment of a Syngas-Diesel Dual Fuelled Compression Ignition Engine

2010 ◽  
Author(s):  
Bibhuti B. Sahoo ◽  
Niranjan Sahoo ◽  
Ujjwal K. Saha
Keyword(s):  
Diesel Engine ◽  
Thermal Efficiency ◽  
Gas Flow ◽  
Direct Injection ◽  
Dual Fuel ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Gas Temperature ◽  
Compression Ignition Engine ◽  
Exhaust Gas Temperature

Synthesis gas (Syngas), a mixture of hydrogen and carbon monoxide, can be manufactured from natural gas, coal, petroleum, biomass, and even from organic wastes. It can substitute fossil diesel as an alternative gaseous fuel in compression ignition engines under dual fuel operation route. Experiments were conducted in a single cylinder, constant speed and direct injection diesel engine fuelled with syngas-diesel in dual fuel mode. The engine is designed to develop a power output of 5.2 kW at its rated speed of 1500 rpm under variable loads with inducted syngas fuel having H2 to CO ratio of 1:1 by volume. Diesel fuel as a pilot was injected into the engine in the conventional manner. The diesel engine was run at varying loads of 20, 40, 60, 80 and 100%. The performance of dual fuel engine is assessed by parameters such as thermal efficiency, exhaust gas temperature, diesel replacement rate, gas flow rate, peak cylinder pressure, exhaust O2 and emissions like NOx, CO and HC. Dual fuel operation showed a decrease in brake thermal efficiency from 16.1% to a maximum of 20.92% at 80% load. The maximum diesel substitution by syngas was found 58.77% at minimum exhaust O2 availability condition of 80% engine load. The NOx level was reduced from 144 ppm to 103 ppm for syngas-diesel mode at the best efficiency point. Due to poor combustion efficiency of dual fuel operation, there were increases in CO and HC emissions throughout the range of engine test loads. The decrease in peak pressure causes the exhaust gas temperature to rise at all loads of dual fuel operation. The present investigation provides some useful indications of using syngas fuel in a diesel engine under dual fuel operation.

Experimental Investigation of the Effect of Exhaust Gas Recirculation on Lubricating Oil Degradation and Wear of a Compression Ignition Engine

2005 ◽  
Vol 128 (4) ◽  
pp. 921-927 ◽  
Author(s):  
Shrawan Kumar Singh ◽  
Avinash Kumar Agarwal ◽  
Dhananjay Kumar Srivastava ◽  
Mukesh Sharma
Keyword(s):  
Experimental Investigation ◽  
Direct Injection ◽  
Exhaust Gas Recirculation ◽  
Lubricating Oil ◽  
Exhaust Gas ◽  
Scanning Electron Micrographs ◽  
Compression Ignition ◽  
Piston Rings ◽  
Compression Ignition Engine ◽  
Gas Recirculation

This experimental investigation was aimed to investigate the effect of exhaust gas recirculation (EGR) on wear of in-cylinder engine parts. EGR setup was prepared for a two-cylinder, air-cooled, constant-speed direct-injection compression-ignition engine. Test setup was run for 96hr under predetermined loading cycles in two phases; normally, operating condition (i.e., without EGR) and with a fixed EGR rate of 25%. Addition of metallic wear debris in the lubricating oil samples drawn after regular interval from both engine operating phases was investigated. Relatively higher concentrations of all wear metals were found in the lubricating oil of the EGR-operated engine, which indicates higher wear of various engine parts. Weight loss of piston rings used in both phases was compared to quantify the amount of wear of piston rings. To quantify the amount of cylinder wear surface roughness parameters of cylinder liners were measured at three positions (top dead center, mid-stroke, and bottom dead center) on thrust and anti-thrust side. A qualitative analysis was also carried out by taking surface profiles and Scanning Electron Micrographs at same locations.

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.

scholarly journals ALDEHYDE EMISSIONS FROM A STATIONARY DIESEL ENGINE OPERATING WITH CASTOR OIL BIODIESEL – DIESEL OIL BLENDS

2010 ◽  
Vol 9 (1-2) ◽  
pp. 35 ◽  
Author(s):  
P. B. Zarante ◽  
M. J. Da Silva ◽  
O. S. Valente ◽  
J. R. Sodré
Keyword(s):  
Diesel Engine ◽  
Castor Oil ◽  
Direct Injection ◽  
Diesel Oil ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Oil Blends ◽  
Fuel Blends ◽  
Flame Ionization

The presence of aldehyde in the exhaust gas of a stationary, direct injection, compression ignition engine operating with castor oil biodiesel/diesel oil blends (B5, B10, B20 and B35) is analyzed. The diesel engine was operated with constant speed of 1800 rev/min and load of 37.5 kW. The gas sample was collected directly from the exhaust. Aldehydes were identified and quantified using gas chromatography (GC) with flame ionization detector analyzer (FID). Acetaldehyde presented higher exhaust concentration than formaldehyde for all fuel blends tested. In general, the exhaust aldehyde levels were very low and did not present significant differences between the fuel blends tested.

Investigation of fuel properties and engine analysis of Jatropha biodiesel of Kenyan origin

2014 ◽  
Vol 25 (2) ◽  
pp. 107-116 ◽  
Author(s):  
Paul Maina
Keyword(s):  
Jatropha Curcas ◽  
Direct Injection ◽  
Data Acquisition System ◽  
Compression Ignition ◽  
Cylinder Pressure ◽  
Acid Base ◽  
Compression Ignition Engine ◽  
Crank Angle ◽  
Test Engine ◽  
Rate Of Heat Release

Biodiesel was produced from jatropha curcas oil of Kenyan origin through a two-step acid-base catalytic transesterification process. The relevant physicochemical properties of the produced biodiesel were tested according to appropriate standards and were found to be within the requirements. Engine tests were carried out in an Audi, 1.9 litre, turbocharged direct injection, compression ignition engine at different loads. Emissions were measured by a Horiba emission analyser system while combustion data was collected by a data acquisition system, from which, cylinder pressure and rate of heat release of the test engine in every crank angle were calculated. Though the biodiesel had slightly higher brake specific fuel consumption when compared to fossil diesel, its emission behaviour was significantly better. The combustion characteristics were also slightly higher as compared to fossil diesel. This study therefore concluded that biodiesel derived from jatropha curcas of Kenyan origin can be utilized as a safe substitute for mineral diesel.

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