METHOD TO CONTROL FUEL SUPPLY AND DEVICE TO CONTROL FUEL SUPPLY Russian patent published in 2013 - IPC F02M47/02 F02M63/04 F02M45/08 

FIELD: engines and pumps.

SUBSTANCE: device for fuel supply control comprises a nozzle with a spring-loaded needle with a mechanical drive, a movement multiplier, a mechanical controller of injection duration, a sprinkler with one level of holes, a high-pressure fuel pump, is equipped with an individual fuel pump for each nozzle with a drive from a cam shaft connected kinematically with a crank shaft, a common low pressure hydraulic accumulator, two control mechanical valves with stems with conical or other sealing surfaces, a quick-acting reversible mechanical drive for each nozzle, a common valve of high pressure control or a valve of high pressure control for each nozzle. Programmable profiled cams with microprofiles of specified length with permanent or variable height on the cam shaft for injection control are made as capable of serial interaction first with the straight part of the plate as it moves from one extreme position into another one, and then with the convex surface of the plate of permanent radius with injections of the specified duration, the convex surface of at least one plate is made with the variable length of the convex end part of the plate with a slant having continuous width with straight incoming edges of microprofiles and slant trailing edges of microprofiles and slant trailing ends of microprofiles, parallel to the slant of the convex end part with continuous control of duration, each plate is made as capable of displacement along the axis of the stem and the needle, each plate is made as capable of displacement in the plane perpendicular or arranged at the angle to the axis of the needle and stem with control of injection duration, and is connected for this purpose by the spline connection to the stem, relative to which the plate moves, the outlet of the low pressure hydraulic accumulator is connected with the inlet of each individual fuel pump of high pressure by a separate pipeline with a check valve, the high pressure control valve is connected to the under-plunger cavity of each individual fuel pump at the outlet and the low pressure hydraulic accumulator, each individual fuel pump is connected to the nozzle and its under-needle and above-needle chambers by high pressure pipelines, the above-needle chamber of each nozzle is connected to the low pressure hydraulic accumulator.

EFFECT: invention improves dynamics of fuel supply, increases indicator efficiency factor, realises multi-injection and time-controlled injections by means of simple mechanical devices.

3 cl, 4 dwg