Achievement of required indexes of diesels is impossible without processes improvement of fuel spraying and mixture formation. Modern diesel fuel equipment does not provide a demanded number of the above-mentioned processes fully. Quality improvement of the processes is a goal of the study. Constructions of nozzles sprayers are offered. They increase turbulence of the fuel stream in cpy flowing section of the sprayers. Fuel flow modeling is conducted in the flowing section of the sprayers. The experimental researches of the D-245.12S-type diesel equipped with developed sprayers are carried out. An opportunity of improvement of emissions toxicity indexes of the diesel with the sprayers mentioned above is shown.