METHOD TO CONTROL FUEL FEED AND DEVICE TO THIS END Russian patent published in 2010 - IPC F02M61/18 F02M51/06 F02M47/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to method and device to control fuel feed into ICE of whatever machinery. Proposed method is implemented by using the following device. Proposed device comprises hydraulic control nozzle with spring-loaded or not-spring-loaded locking elements with at least leveled holes and at least one locking element with separate control chambers for every locking element that communicate with relief valves, extra control chamber and extra control valve arranged on two-position control valve stem to be rearranged together with the latter. It comprises also second inlet throttle arranged in high-pressure channel communicating extra control chamber via extra control valve. Said extra control chamber communicates with at least two fuel feed control units with shaped cams with mirror-opposition programs. At least each cam is intended per nozzle and programmed for one injection cycle, and comprises master cam, plunger, spring arranged on the platform, cylinder with through bore interacting with said plunger fixed on said platform together with spring. Every fuel feed control unit, communicates, via its cylinder bore, with nozzle extra fuel feed chamber. Said extra fuel feed chamber communicates, via pipeline with check valve, with low-pressure accumulator, pressure control valve and then with inlet high-pressure fuel pump.

EFFECT: fuel feed according to square laws at pressure steep rise and drop front in injection and maximum injection pressure, maximum possible efficiency and minimum control fuel rate.

5 cl, 7 dwg