METHOD TO SUPPLY FUEL AND DEVICE TO CONTROL FUEL SUPPLY Russian patent published in 2013 - IPC F02M61/18 F02M47/02 

FIELD: machine building.

SUBSTANCE: device comprises a nozzle with two levels of holes with a spring-loaded needle and a bushing coaxial to the needle. The needle is connected mechanically with a stem of the first mechanical valve with the locking surface closing the channel for supply of high pressure fuel under the needle and bushing from an individual hydraulic accumulator of high pressure, and also with a stem of the second mechanical valve with the locking surface, closing the channel, which connects the common chamber above the needle and the bushing with the hydraulic accumulator of low pressure during cutoff. The needle of the nozzle is connected mechanically via a multiplier of movement or directly with a quick-acting reversible mechanical drive for its linear displacement, which is equipped with at least one plate, which is kinematically connected with the needle, for each cylinder with the convex surface of permanent radius at one end of certain length of the convex part with at least one slant on it, a cam shaft connected kinematically with a crank shaft with at least one programmable profiled cam on it, with at least one microprofile at each cam with permanent specified low height for realisation of the preliminary injection, with at least one microprofile with high height for realisation of the main injection or at least one microprofile of alternating height, which varies in accordance with the specified length along the length of microprofile for realisation of the main injection with at least one microprofile for realisation of injection after the main one with height equal to height of the microprofile for realisation of preliminary injection, programmable profiled cams with microprofiles of specified length with permanent or alternating height on the cam shaft for control of injection are made as capable of interaction first with the straight part of the plate during its movement from one extreme position into the other one, and then with the convex surface of the plate of permanent radius for all injections or alternating radius for the main injection in accordance with the specified law during injections of specified duration, the convex surface of at least one plate is made with convex end part length that is alternating along the width of the plate, with at least one slant along the width of the plate. Microprofiles for preliminary, main injections and injection after the main one are made with straight incoming edges, parallel to the axis of the shaft and slant trailing ends, which are parallel to the appropriate slants of the convex end part of the plate during continuous control of duration, each plate is made with capability of displacement in the plane perpendicular to or arranged at the angle to the axis of the needle and the stem with controlled duration of injection and is connected for this purpose by a splint joint with the stem, relative to which the plate moves.

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

2 cl, 4 dwg