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 comprises moving two-position valve upwards, opening relief valve to communicate with outer space of chamber arranged above sprayer locking element, and feeding fuel into nozzle sprayer at high controlled pressure. It comprises also, varying position of two-position valve to feed fuel via inlet throttle into filling valve and, via it, into chamber arranged above the sprayer locking element, locking nozzle sprayer and cutting off fuel feed. Fuel is additionally fed through second inlet throttle into second control valve chamber for said chamber position to be varied at a time with two-position valve position. Additional control valve chamber is communicated, in opening said valve, with final volume variable chamber wherein rarefaction is created according to at least one preset program with at least one step of varying volume in fuel injection into at least one cylinder via at least one level of sprayer holes. On closing additional valve, final fuel volume is forced, via second control valve chamber, into final volume second chamber and high-pressure fuel pump in between fuel feed cycles. Fuel from first control chamber is forced into final volume second chamber with relief valve opened, and, then via first throttle, into second final volume chamber during rearrangement of relief and filling valves. Proposed device comprises hydraulically controlled 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, additional control chamber and additional 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 additional control chamber via additional control valve. Said additional 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 additional fuel feed chamber. Said additional 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: maximum possible efficiency and minimum control fuel rate.

6 cl, 7 dwg