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

Author(s):  
Nagaraj Ramalingayya Banapurmath ◽  
Varun Kumar Reddy N ◽  
S. G. Sangashetty
Author(s):  
N. Varun Kumar Reddy ◽  
S.G. Sangashetty ◽  
N.R. Banapurmath

In the view to maintain ecological balance, downtrend in availability of petroleum-based fuels and stringent pollution norms have triggered to search for an alternate fuel for internal combustion engines. Present work is to study the influence of IT (Injection Timing), IOP (Injector opening pressure) and number of holes in nozzle on the performance and emission characteristics of diesel engine fueled by Rice bran Oil Methyl Esters (ROME) is reported. For a 5-hole nozzle, IOP at 240 bar obtained the highest brake power of about 28%. Gradual upturn of peak pressure was observed when the IOP was varied from 210 bar to 240 bar.


Author(s):  
V. Anandram ◽  
S. Ramakrishnan ◽  
J. Karthick ◽  
S. Saravanan ◽  
G. LakshmiNarayanaRao

In the present work, the combustion, performance and emission characteristics of sunflower oil, sunflower methyl ester and its blends were studied and compared with diesel by employing them as fuel in a single cylinder, direct injection, 4.4 KW, air cooled diesel engine. Emission measurements were carried out using five-gas exhaust gas analyzer and smoke meter. The performance characteristics of Sunflower oil, Sunflower methyl ester and its blends were comparable with those of diesel. The components of exhaust such as HC, CO, NOx and soot concentration of the fuels were measured and presented as a function of load and it was observed that the blends had similar performance and emission characteristics as those of diesel. NOx emissions of sunflower oil methyl ester were slightly higher than that of diesel but that of sunflower oil was slightly lower than that of diesel. With respect to the combustion characteristics it was found that the biofuels have lower ignition delay than diesel. The heat release rate was very high for diesel than for the biofuel.


Author(s):  
Masoud Iranmanesh ◽  
J. P. Subrahmanyam ◽  
M. K. G. Babu

In this investigation, tests were conducted on a single cylinder DI diesel engine fueled with neat diesel and biodiesel as baseline fuel with addition of 5 to 20% DEE on a volume basis in steps of 5 vol.% as supplementary oxygenated fuel to analyze the simultaneous reduction of smoke and oxides of nitrogen. Some physicochemical properties of test fuels such as heating value, viscosity, specific gravity and distillation profile were also determined in accordance to the ASTM standards. The results obtained from the engine tests have shown a significant reduction in NOX emissions especially for biodiesel and a little decrease in smoke of DEE blends compared with baseline fuels. A global overview of the results has shown that the 5% DEE-Diesel fuel and 15% DEE-Biodiesel blend are the optimal blend based on performance and emission characteristics.


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