DIESEL ENGINE FUEL SYSTEM Russian patent published in 2000 - IPC

FIELD: mechanical engineering; diesel engines; injection systems with several nozzles supplied by common pumping unit. SUBSTANCE: diesel engine fuel system has low-pressure line communicating with source, fuel injection pump with delivery space provided with intake, delivery and cutoff channels. Intake channel and filler valve are connected to fuel source through low-pressure line, delivery channel and valve are connected by high-pressure pipeline to first atomizer installed in combustion chamber, and cutoff channel is connected to second atomizer arranged in intake manifold close to intake valve. System is furnished with controlled shutoff member coupled with fuel pump control device and arranged in pipeline providing coupling with second atomizer. Fuel system has cutoff fuel pulse shaper whose central channel is made in form of low-pressure line and is connected to united intake-cutoff channel, and to excess fuel drain line through throttle with optimized hole, and to second atomizer through pipeline furnished with spool coupled with fuel pump control device. Volume of channels inside pulse shaper housing is optimized depending on summary volume of pipelines, spaces and high-pressure channels. Arrangement of filler valve, throttle and second atomizer connecting union is also optimized. EFFECT: improved economy and ecological characteristics of diesel engine by increasing injection pressure and improving quality of fuel atomizing and process of combustion. 4 cl, 1 dwg