FEATURES OF OPERATION OF THE DIESEL FUEL EQUIPMENT WITH A CLOSED VOLUME FORCES
Theoretical and experimental studies of the diesel power supply system with recirculation of fuel leaks to the high-pressure line are given. The possibility of using fuel equipment with a closed volume of nozzles for diesel engines such as KAMAZ-740 is substantiated.Determined experimentally by the leakage of fuel, depending on the diametral gap between the needle and the nozzle body and justified its limiting value. High pressure pump discharge valves are proposed, the design of which is capable of eliminating the possible «hydraulic jamming» of a nozzle needle with a closed volume. It is noted that the fuel system with a closed injector volume has self-regulation of the fuel cycle during the increase of the gap in the nozzle. The results of testing a KAMAZ-740 diesel engine with fuel equipment with serial and experimental injectors are presented. An increase in the stability of fuel injection, a reduction infuel consumption and a reduction in soot in the exhaust gases were noted.