Performance Of DI Diesel Engine Research Articles

The effect of operating parameters on performance and emissions of DI diesel engine fuelled with Jatropha biodiesel

In the present investigation the combustion, performance and emission analysis of a small Direct Injection diesel engine was done in order to find the effect of Jatropha Methyl Ester as a fuel on the engine. In this study, speed, load and fuel injection timing were varied according to (3 × 3 × 3) full factorial design and cylinder pressure, fuel consumption, smoke and emissions of HC and NOx were measured. For understanding the nature of cylinder pressure rise and combustion characteristics of Jatropha Methyl Ester and diesel fuel, the cylinder pressures were recorded for all the combinations of load, speed and injection timing. Comparative study of engine emissions and fuel economy was carried between Jatropha Methyl Ester and Diesel. The response surface quadratic models were generated for the four output parameters viz. smoke, brake specific fuel consumption, unburned hydrocarbons and NOx relative to the three input parameters: speed, load and injection timing. The response surface equations were then solved as multi-objective nonlinear constrained optimization problem using the Design-Expert 10.0 software, which makes use of the desirability functions. Further, optimization was done to search the optimum combinations of load, speed, and injection timing which give the possible minimum emissions, well lower than the set values. The maximum rate of heat release was found to be higher for diesel than that of JME at all the speeds, loads and injection timings combinations. The maximum reduction of 72.56% in smoke level was observed at 12°CA btdc, 70% load and at 3100 rpm when JME was used as fuel. Maximum increase of 30% in NOx emission was found at 15° crank angle, 70% load and 2300 rpm when JME was used as fuel. Response surface methodology (RSM) was found to be a useful technique for modeling engine responses using three input parameters viz. speed, load and injection timing.

Experimental investigation on performance, combustion and emission characteristics of DI diesel engine using algae as a biodiesel

Diesel Powered engines are predominately used in transport and power generators. Due to rapid depletion of fossils fuels like diesel, there is need to find alternate resources for as a fuel for transport and power sector. The use of third generation fuels like algae seems to be a promising solution to satisfy our energy demands in future. In these work algae is used as an alternative fuel with different blend combination with diesel and the results obtained are summarized. Algae fuel is blended with diesel on a volume basis, namely A10, A20, A30, A40 and A100 and made to run in diesel engines. The properties of the fuels were found according to American Society for Testing and Materials standards. Experimental testing was carried out in a single cylinder direct injection diesel engine. Among the various blends tested A20 shows closer estimation with diesel results in higher thermal efficiency lower HC, CO, Smoke and particulate matter emissions. However, the other emissions like Nitrous oxide and carbon dioxide were shown marginally higher. Regarding cylinder pressure and heat release rate curves, the peak value obtained is considerably lower at higher load condition while compared with diesel.

Effect of ceramic coating on the performance, emission, and combustion characteristics of ethanol DI diesel engine

Ethanol and vegetable oils played an important role for more than 70 years in many countries all over the world. Since 19th century, ethanol has been used as fuel for Compression Ignition (CI) engines. By fermenting and distilling the biomasses, ethanol can be obtained and hence it can be considered as a renewable fuel. One way of increasing the efficiency of the ethanol fuel CI engine is to use it as a Low Heat Rejection Engine (LHR). In LHR engine, the thermal efficiency of the CI engine can be increased by reducing the heat loss to the surroundings through coolant and exhaust gas. The heat can be transferred from the combustion chamber to the piston, cylinder wall and finally to the cooling water. The heat transfer can be minimized by insulating the piston and cylinder wall and coating the piston and the cylinder wall with ceramics, which can withstand high thermal stresses. The coating materials have low thermal conductivity, thus reducing the heat flux into the piston and thus the heat transfer to the coolant is reduced. In the present work, Zirconia is used for coating the engine components for lower thermal conductivity. It is concluded that sole ethanol as fuel with glow plug show a reduction in exhaust emissions with reduced efficiency compared with conventional CI engine operated with diesel fuel. But it was observed that, there is a slight increase in thermal efficiency of the engine with the retarded injection timing. Converting a conventional engine to low heat rejection diesel engine further increases the thermal efficiency and reduces the carbon monoxide and unburned hydrocarbon emissions drastically, whereas oxides of nitrogen emission are increased because of higher combustion temperature.

Optimization of a DI Diesel Engine Performance and Exhaust Emissions Fueled with Biodiesel using Artificial Neural Network

Optimization of a DI Diesel Engine Performance and Exhaust Emissions Fueled with Biodiesel using Artificial Neural Network

Effect of spray characteristics influences combustion in DI diesel engine – A review

In a DI Diesel Engine performance, emission and combustion characteristics, spraying behaviour plays a vital role. Emerging research in new fuels is increasing day by day, to find the best fuel in light of the combustion characteristics. It is mandatory to study about effects of spray behavior, droplet growth and the formation of new droplets. The aim of this review is to compare the spray characteristics of diesel engines under various ambient conditions. It can be inferred that if the incident primary sprays developed have a generalized kind of size distribution, then the resulting spray after injection breeds part of the same class of distributions. A spray combustion model is being researched to include more standard size distributions including the effects of droplet interactions and the relative movement of droplets and air, which can affect the engine’s combustion characteristics. Numerical investigation of spray structure gives the immense knowledge on spray behaviors inside the combustion chamber.

Performance and emissions characteristics of DI diesel engine using biodiesel blend with different injection pressures

This research work investigated the performance and emission behaviors of diesel engine operated with the Neem oil methyl ester (NOME) with different injection pressures such as 200 bar, 225 bar, 250 bar. The engine test was conducted to study the performance and emissions behaviors of diesel engine using B20 biodiesel blend with different injection pressures. The performance parameters such as brake thermal efficiency, brake specific fuel consumption and exhaust gas temperature and emission parameters such as carbon monoxide, hydro carbon oxides of nitrogen emissions and smoke opacity were measured and analyzed and the results were compared with diesel and biodiesel blend at the original injection pressure of 200 bar. The results showed that BTE of B20 at 225 bar is comparable with diesel fuel and B20 at 200 bar and the exhaust emissions were decreased with 225 bar drastically when compared to 200 bar and 250 bar at full load.

Enhancing the Impact of Biodiesel Blend on Combustion, Emissions, and Performance of DI Diesel Engine

The current research is conducted to evaluate experimentally the combustion, emissions, and performance of a 4-stroke, DI diesel engine when titanium dioxide nanoparticles are added to castor biodiesel–diesel blend in varying doses. The experiments are conducted at engine speed of 2000 rpm, various loads. Results of this study reveal that utilizing of titanium oxide nanoparticles (TiO2NPs) additives improves engine performance and reduces emissions. A decrease in brake-specific fuel consumption (BSFC) and an increase in brake thermal efficiency of up to 4.8% and 37.7%, respectively, are recorded. The ultimate reduction in NOx emission is 44.3% and is achieved at a TiO2NPs dose of 120 mg/l and 40% engine load. In addition to this reduction, a 5% decrease in CO emission, 4.25% increase in cylinder pressure and 15% deterioration in the BSFC are also recorded. Also, the maximum reduction in CO emission is 27% and is attained at TiO2NPs dose of 80 mg/l and 80% engine load. This reduction is accompanied with 6% decrease in NOx emission, 1.1% increase in cylinder pressure, and 4.8% reduction in BSFC. Based on the obtained results, the recommended dose of TiO2NPs in blend CB30 is 80 mg/l.

Study of Performance, Combustion and Emission Characteristics of DI Diesel Engine Fuelled with Neem Biodiesel with Carbon Nano Tube as Additive

To tackle one of the major environmental issues concerning modern day mankind, that is air pollution and to reduce dependency on other countries for conventional fuel, finding an alternative fuel is of high priority. Biodiesel is one such alternative. Adding nanoparticles like Carbon nanotubes (CNT) leads to reduction in emissions and enhancement in performance. In this context, in the present paper an experimental investigation was carried out on a computerized single cylinder water cooled diesel engine coupled with an eddy current dynamometer to determine the impact of blending CNT with biodiesel (Neem Oil Methyl Ester or NOME) and a comparative study of various blends using diesel as the baseline was done. The concentration of CNT used were 25 ppm, 50 ppm and 100 ppm CNT blended with B20 biodiesel. The blends were prepared using homogeniser. Readings were recorded for different loads for all the blends and comparative graphs were drawn for performance, combustion and emission characteristics. There was an improvement in the performance characteristics with 8.1% increase in BTE, lowered emissions with 0.0785% decrease in CO and 8.15% decrease in UBHC emissions along with improved combustion relative to diesel when CNT (50 ppm) was added to B20 biodiesel.

Effect of design parameters on performance and emissions of a CI engine operated with diesel-biodiesel- higher alcohol blends

The present study attempts to study the influences of piston geometry, butanol fumigation, EGR, injection pressure and injection timing upon the performance and emissions of a light-duty DI diesel engine fuelled with diesel, Jatropha methyl ester (JME) and 20% by vol. of n-butanol/diesel blends. Experiments were designed based on Taguchi L18 orthogonal array that considered main fuel injection timing, EGR, premixing ratio of n-butanol with diesel, injection pressure, secondary injection timing, piston geometry, main injection fuel and secondary injection fuel as factors and NOx emission, smoke opacity and BSFC as responses. The best combination of the above factor levels were predicted by using desirability function. Results indicated that B20 injected at 20°CA bTDC with an injection pressure of 200 bar under 10% EGR alongside 40% by vol. of butanol/diesel fumigation with a premixing ratio of 20% at 9°CA aTDC in the engine fitted with a torroidal piston was predicted to deliver 359.13 ppm of NOx emissions, 74.83% of smoke opacity with 1.127kg/kWh of BSFC. The tests revealed that the predictions by using desirability function were within a reasonable accuracy of 10%.

A comprehensive study on the effects of internal air jet piston on the performance of a JOME fueled DI diesel engine

In DI diesel engine, air-fuel mixing is a major parameter that affects the performance, emissions parameters and combustion characteristics. In-cylinder air motion and proper mixing of fuel have a strong effect on BTE, BSFC, UHC, CO, smoke and NOx emissions, because of improvement in the combustion of fuel. In this experimental investigation in order to enhance the performance of biodiesel-fueled diesel engine, the engine was tested using piston having internal air jets using 20% Jatropha Oil Methyl Ester-diesel blend (B20 JOME). For this purpose, the piston of the standard engine having Hemispherical Combustion Chamber (HCC) was reformed into Toroidal Re-entrant Combustion Chamber with internal air jets (TRCC-IAJ) that has the same volume as baseline HCC. The tests were performed at IMEP of 1.7, 3.2, 4.7, 6.2 and 7.7 bar with the standard injection timing and pressure. The test results show that the BTE and BSFC provide the best result for the modified piston compared to the original. The TRCC-IAJ reduced the smoke, CO and HC; while it showed the opposite effect with a sharp increase in NOx emissions. In overall, the results show that the modified piston TRCC-IAJ has improved the overall performance and emissions of the JOME-diesel blend.

Investigation of performance and emissions of DI diesel engine with cottonseed biodiesel along with diethyl ether

In this paper, we found a way to solve the demand for compression ignition engine fuels and their good fuel efficiency but they produce severe exhaust emissions. This will result in the further examination of ways which the composition of the fuel used in a Diesel engine could be changed to decrease emissions. To get oxidation in diesel fuel by adding oxygen enriched fuel is a method for complete combustion. In addition, many oxygenates have higher cetane values and their addition with diesel fuel results in the increase of overall cetane number which in turns leads to higher combustion rate and enhanced combustion with lower emissions. Diesel oxygenates blends are the recent research areas. In this paper, biodiesel was blended at different proportions of cottonseed oil and diesel with diethyl ether as diesel oxygenates. investigation of performance and emission characteristics was done on varying loads.

Investigation of Influence of Injector Opening Pressure and Nozzle Geometry on the Performance and Emission Characteristics of DI Diesel Engine with CAOME

The diminution of fossil fuels and stringent pollution norms obliging researchers to search for fuels that result in less pollution and the one that suits to power compressed ignition engines. In the current work the effect IOP (Injector opening pressure) and nozzle geometry on the performance and emission characteristics of diesel engine fueled by Castor oil methyl esters (CAOME) is reported. For a 5-hole nozzle at 240 bar IOP the highest brake power is obtained (27.32%). Peak pressure gradual upturn was observed when the IOP was varied from 210 bar to 240 bar and the peak value of pressure is 79 bar at IOP of 240 bar.

Effect of antioxidant additives on performance and emission behavior of biodiesel fueled DI diesel engine

ABSTRACTMany recent studies show that 20% proportion of biodiesel–diesel blend (A20) can substantially reduce the hydrocarbon, carbon monoxide, and smoke emissions. However, there is a slight increase in oxides of nitrogen (NOx) emission for A20 than that of diesel and it is barrier to market expansion. The addition of antioxidant additives is the most effective method for mitigating the NOx emission. Hence, this present work aims to investigate the effect of antioxidant additives on NOx emission in an Annona biodiesel-operated diesel engine. The antioxidant additives such as p-phenylenediamine (PPDA), A-tocopheryl acetate, and L-ascorbic acid are used in the present investigation. It is evidently proved from the experimental investigation that use of antioxidant additive is effectively controlling the NOx emission in diesel engine. Result shows that 250 mg concentration of PPDA additive with A20 is optimum for NOx mitigation up to 25.7% when compared to that of diesel without any major modifications.

Effects of thermal barrier coating on the performance, combustion and emission of DI diesel engine powered by biofuel oil–water emulsion

Owing to the fast depletion of fossil fuels and their skyrocketing price due to the tremendous demand, they become imperative to find renewable alternative fuels for diesel engines. Vegetable oils and their mix with diesel in various proportions, called biodiesel, have been found to be very useful in reducing the alarming consumption of fossil fuels. In the present investigation, lemongrass oil is used as an alternative fuel. The availability of lemongrass oil is adequate for Tamil Nadu and Kerala. The coating material chosen is the partially stabilized zirconium because it has low thermal conductivity and high thermal coefficient. The piston top face, cylinder head, inlet valve and the outlet valve are coated. The purpose of low heat rejection engine or coated engine during the combustion process less heat is rejected by insulating materials. In the current work, the experiment is carried out with lemongrass oil with water emulsion and diesel in a four-stroke direct ignition engine with coating and without coating at various load conditions. The diesel engine run with lemongrass oil–water emulsion (94% LGO + 5% water + 1% surfactant), and low heat rejection engine performed better and gave better brake thermal efficiency compared with raw lemongrass oil–water emulsion blend at peak load. Then, the brake-specific fuel consumption of lemongrass oil–water emulsion in the coated engine was 325 (g kW−1 h−1) which was lower than that of lemongrass oil–water emulsion (94% LGO + 5% water + 1% surfactant) in the uncoated engine. Further, combustion parameter of lemongrass oil–water emulsion blend tested in coated engine produced 60 bars in-cylinder pressure, and it was better than lemongrass oil–water emulsion in the uncoated engine. Both the cumulative heat release rate and the heat release rate were in superior range compared with lemongrass oil–water emulsion in the uncoated engine. As regards tailpipe emission, the lemongrass oil–water emulsion blend in the coated engine at peak load delivered a steep reduction in carbon monoxide, hydrocarbon and smoke emission of base diesel blend in the uncoated engine. But, on the contrary, NOx and CO2 emissions were steeply higher compared with the diesel blend that powered the uncoated engine. The entire tested parameters led to the conclusion that lemongrass oil–water emulsion used in the coated diesel engine would be a healthier and economical substitute fuel for hydrocarbonated fuels.

Impact of Injection Timing on the Performance of Single Cylinder DI Diesel Engine Fueled with Solid Waste Converted Fuel

The transfer of waste plastics has turned into an incredible test to the waste management system and because of urbanization and industrialization has prompted consumption of petroleum derivative for energy prerequisite in different areas. The answers for these issues could be overwhelmed by legitimate use of waste plastics as fuel. The paper depicts a correlation of the utilization of pyrolysis oil which is plastic pyrolysis oil (PPO) and diesel in the appraisal of engine execution. Pyrolysis oil is utilized as fuel to check the execution on one-cylinder with water cooled diesel engine. From the investigation, it was found that without engine adjustment, the PPO offers better engine execution with advancement of Injection timing (IT) and could enhance execution by modifying engine.

Evaluation of the effect of gasoline fumigation on performance and emission characteristics of a diesel engine fueled with B20 using an experimental investigation and TOPSIS method

Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) method was used to comprehensively evaluate performance and emission characteristic of DI diesel engine with fumigation gasoline under different engine operating conditions. Diesel and B20 fuel were considered as baseline fuels and gasoline was inducted as fumigation in intake manifold at two different ratio, so that at each operation point, six cases of fuel were tested. The experimental results showed that gasoline fumigation method for both baseline fuels of diesel and B20 results in a significant increase in UHC and CO emissions, and decrease in exhaust gas temperature, smoke opacity and NO and CO2 emissions. Also, gasoline fumigation increased the brake thermal efficiency at medium and higher loads to about 5% for diesel baseline fuel, while the brake thermal efficiency decreased slightly in case of the B20 baseline fuel with gasoline fumigation. Moreover, the using B20 as an alternative fuel to diesel fuel in modes of with fumigation gasoline reduced the UHC and CO emissions, smoke opacity, exhaust gas temperature respectively to about 20.5%, 16.4%, 9% and 1.1% on average throughout engine loading. While, NO emission of B20 was up to 5% higher than diesel at modes with fumigation gasoline. Finally, all criteria of performance and emission were considered and the evaluation process done to obtain final ranking and choosing the best alternative or the best combination of fuel. From the analytical results it was determined that case of B20 with fumigation gasoline results in desirable performance and minimum emissions at some operation points.

Experimental investigation of in-cylinder air flow to optimize number of helical guide vanes to enhance DI diesel engine performance using mamey sapote biodiesel

The current research work investigates the influence of helical guide vanes in to the intake runner of a D.I diesel engine operating by the high viscous Mamey Sapote biodiesel to enhance in-cylinder suction air flow features. Helical guide vanes of different number of vanes are produced from 3D printing and placed in the intake manifold to examine the air flow characteristics. Four different helical guide vane devices namely 3, 4, 5 and 6 vanes of the same dimensions are tested in a D.I diesel engine operating with Mamey Sapote biodiesel blend. As per the experimental results of engine performance and emission characteristics, it is found that 5 vanes helical guide vane swirl device exhibited in addition number of increased improvements such as the brake power and bake thermal efficiency by 2.4% and 8.63% respectively and the HC, NOx, Carbon monoxide and, Smoke densities are reduced by 15.62%, 4.23%, 14.27% and 9.6% at peak load operating conditions as collate with normal engine at the same load. Hence this investigation concluded that Helical Guide Vane Devices successfully enhanced the in-cylinder air flow to improve better addition of Mamey Sapote biodiesel with air leading in better performance of the engine than without vanes.

Combined influence of injection timing and EGR on combustion, performance and emissions of DI diesel engine fueled with neat waste plastic oil

Disposal of waste plastic accumulated in landfills is critical from the environmental perspective. The energy embodied in waste plastic could be recovered by catalytic pyrolysis as waste plastic oil (WPO) and could be recycled as a fuel for diesel engines. This method presents a sustainable solution for waste plastic management as the gap between global plastic production and waste plastic generation keeps widening. The present study investigates the combined influence of EGR and injection timing on the combustion, performance and emission characteristics of a DI diesel engine fueled with neat WPO. Experiments were conducted at three injection timings (21°, 23° and 25°CA bTDC) and EGR rates (10, 20 and 30%) at the engine’s rated power output. When compared to diesel, the combustion event occurred closer to the TDC when the injection timing is delayed from 25°CA bTDC to 21°CA bTDC. The peak in-cylinder pressures and HRRs dropped gradually as the injection timing was delayed from 25°CA bTDC to 21°CA bTDC at all EGR rates. The engine delivered diesel-like fuel consumption with 5.1% higher brake thermal efficiency. NOx decreased up to 52.4% under 30% EGR when WPO was injected lately 21°CA bTDC. Smoke density remained lower by 46% and 9.5% for 10% and 20% EGR rates respectively for WPO only at early injection timing of 25°CA bTDC. HC and CO emissions stayed lower at early injection timing of 25°CA bTDC under 10% EGR. WPO injected at the advanced injection timing of 25°CA bTDC and low EGR rate of 10% was found to simultaneously reduce smoke and NOx by 46% and 38% respectively.

Effect of Injection Timing and cold EGR on Performance and Emission Characteristics of a Stationary Single Cylinder DI-Diesel Engine Fueled with n-Butanol/Diesel Blends

Effect of Injection Timing and cold EGR on Performance and Emission Characteristics of a Stationary Single Cylinder DI-Diesel Engine Fueled with n-Butanol/Diesel Blends

Experimental Investigation on Performance of DI Diesel Engine Using Madhuca Indica Biodiesel and its Diesel Blends

Experimental Investigation on Performance of DI Diesel Engine Using Madhuca Indica Biodiesel and its Diesel Blends