Вплив на техніко-економічні та екологічні показники дизелів КамАЗ-740 зміни конструктивних параметрів форсунки

Abstract

При проведенні дослідження встановлено, що зміна діаметру соплових отворів в форсунці з 0,12 до 0,16 мм практично не впливає на техніко-економічні та екологічні показники дизеля, в діапазоні 0,16 до 0,26 мм вони покращуються, подальше збільшення діаметрів соплових отворів значно погіршує показники двигуна.

При проведении исследования установлено, что изменение диаметра сопловых отверстий в форсунке с 0,12 до 0, 16 мм практически не влияет на технико-экономические и экологические показатели дизеля, в диапазоне 0,16 до 0,26 мм они улучшаются, дальнейшее увеличение диаметра сопловых отверстий значительно ухудшает показатели двигателя.

The main purpose of this paper is to study the impact on the technical , economic and environmental performance of diesel KamAZ-740 changes the design parameters of the nozzle. The study was conducted using the design of the " Diesel-RK." The base diameter of nozzle holes is 0,2 mm diameter nozzle at such holes rated power output is 154 kW. Increasing the diameter of nozzle holes to 0,24 mm results in a slight increase in the rated power of the engine. Further increase in the diameter of the injector nozzle holes , crucially, the process of mixing , leading to a reduction in engine power by 5,5 % from the baseline value of power. Increasing the diameter of the nozzle holes to 0,24 mm leads to an increase in maximum torque by 0.9 %, a further increase in the diameter of the nozzle orifice leads to a decrease in maximum torque by 5,4 % from the baseline value. Increasing the diameter of nozzle holes a few mm to 0,24 improves the fuel efficiency of the engine. Further increase in the diameter of the injector nozzle holes to 0,28 mm reduces fuel dalekobiynist current angle of opening, as deteriorating profitability of the engine- effective specific fuel consumption increases by 6,5%. Reducing the diameter of the nozzle holes in the atomizer to 0.12 mm has virtually no effect on the technical and economic performance of diesel. Increasing the diameter of nozzle holes leads to the reduction of nitrogen oxides , changes in the diameter of the nozzle holes in the nozzles of 0,12 mm to 0,24 mm has virtually no effect on the amount of particulate matter in the exhaust gases , further increasing the diameter of nozzle holes in the atomizer to 0,28 mm leads to a significant increase in emissions of particulate matter in the exhaust gases. Thus , reducing the diameter of the nozzle holes virtually no effect on the technical , economic and environmental performance of diesel KamAZ-740 , increasing the diameter of the injector nozzle holes to 0,24 mm allows to increase engine power and maximum torque of nearly 5% without changing the rest of the structural parameters Aperture. Further increase in the diameter of the injector nozzle holes worsen the techno-economic and environmental performance of the engine.