| 摘要 |
FIELD: machine building.SUBSTANCE: device to control fuel supply includes a nozzle with a needle with two valves with mechanical switching from one position into another, a sprayer with one level of openings, a fuel tank, a fuel injection pump, a fuel pump of high pressure. The above-needle chamber of each nozzle is connected with a hydraulic accumulator of low pressure. The outlet of the low pressure hydraulic accumulator is connected to the inlet of the individual fuel pump of high pressure with its under-plunger cavity. The outlet of the individual fuel heating of high pressure via a high pressure control valve is connected with the low pressure hydraulic accumulator. The first control mechanical valve for each nozzle is installed in the beginning of the nozzle between the inlet of the individual fuel pump of high pressure and under-needle chamber of each nozzle. The second control mechanical valve is installed in the channel of the nozzle between the above-chamber chamber of each nozzle and the hydraulic accumulator of low pressure, stems of the first and second mechanical valves are connected by levers with a stem, and via it - via a quick-acting reversible mechanical drive, which is equipped with at least one plate for one cylinder with the surface convex at one end having the permanent radius and certain length of the convex part, a shaft connected kinematically with a crank shaft, with at least one profiled cam on it with at least one microprofile on each profiled cam. Microprofiles are made with the incoming edge parallel to the axis of the nozzle needle and with the trailing edge parallel to the slant of the convex surface of the plate end, during control of injection duration. The convex surface of each plate is made with one or several slants along its width, each plate is made as capable of displacement along the axis of the stem, connected directly or a multiplier of movement with a stem, with which the first and second mechanical valves are connected. Each plate is made as capable of displacement in the plane perpendicular or arranged at the angle to the axis of the needle, the stem with control of injection duration and is connected for this purpose with a splint joint with a 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 |
