Improvement of Design of Diesel Injector Nozzles

Abstract

Abstract The relevance of the article is explained by the necessity of improving fuel spraying and mixture formation processes in diesel engines. A design of injector nozzles enhancing the quality of the fuel injecting and spraying in diesel engines was proposed. The improvement of these processes is achieved by using a modified nozzle with different lengths of nozzle holes for injectors asymmetrically installed in diesel engines. Experimental studies of a D-245.12S diesel engine equipped with the injector nozzles serially produced and the modified injector nozzles were carried out. The possibility of improving the exhaust gas toxic characteristics of the diesel engine equipped with the modified injector nozzles was demonstrated. The installation of such nozzle in the diesel engine has allowed reducing the emission of nitrogen oxides by 2.1%, of carbon monoxide by 9.5%, and of unburned hydrocarbons by 10.9%, and reducing the average specific effective fuel consumption by 2.5 g/(kW•h), when the engine was operating in the 13-mode cycle ECE R49.