This study aimed to investigate the changes in pressure and the effect of fuel type on the fuel injection quantity in a unit of time on diesel engines equipped with a common rail system and using a Bosch measuring device. In the first stage, single-hole injector nozzles were used at reverse pressures of 60 and 100 bar (the pressure of compressed air entering the combustion chamber into the injector nozzle when the needle opens) and the amount of fuel was measured and recorded at different pressures. The result was extracted as a linear relationship of pressure and injection quantity with fitting lines with a maximum accuracy of 0/98. In the second stage, 8-hole injector needles were used. The pressure and fuel amount graphs were extracted at reverse pressures of 60 and 100 bar, indicating oscillatory analysis of relative increase in spray amount at 1500 and 2000 bar pressures. For investigating diesel type in injection amount, two samples of Iranian-produced diesel named D2 and Mahshahr 1% , both with cetane number 49, pour point (-3°C), density of 820 kg/m³, but different viscosity, were evaluated. The results in reverse pressure 5, 25 and 70 times with the pressure of injection 90, 200 and 300 times described that by increasing pressure, the amount of injection of needles with sample D2 was significantly higher. At constant pressure, with increasing reverse pressure, the amount of injection decreases due to the penetration of the air compressor into the injection chamber of the injector needle.
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foroozandehnasab,M. and khosravani,M. (2025). Evaluation of the amount of injection in the injector needles of the diesel common rail fueling system using the Bosch method. Karafan Journal, 22(3), 87-106. doi: 10.48301/kssa.2024.470891.2962
MLA
foroozandehnasab,M. , and khosravani,M. . "Evaluation of the amount of injection in the injector needles of the diesel common rail fueling system using the Bosch method", Karafan Journal, 22, 3, 2025, 87-106. doi: 10.48301/kssa.2024.470891.2962
HARVARD
foroozandehnasab M., khosravani M. (2025). 'Evaluation of the amount of injection in the injector needles of the diesel common rail fueling system using the Bosch method', Karafan Journal, 22(3), pp. 87-106. doi: 10.48301/kssa.2024.470891.2962
CHICAGO
M. foroozandehnasab and M. khosravani, "Evaluation of the amount of injection in the injector needles of the diesel common rail fueling system using the Bosch method," Karafan Journal, 22 3 (2025): 87-106, doi: 10.48301/kssa.2024.470891.2962
VANCOUVER
foroozandehnasab M., khosravani M. Evaluation of the amount of injection in the injector needles of the diesel common rail fueling system using the Bosch method. Karafan, 2025; 22(3): 87-106. doi: 10.48301/kssa.2024.470891.2962
