METHOD OF FUEL FEED CONTROL AND DEVICE TO THIS END Russian patent published in 2014 - IPC F02M61/18 F02M47/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to fuel feed control in large stationary and mobile diesel power plants used at ships, locomotive, and other transport facilities and in earthworks. Proposed device comprises atomizer with spring loaded shutoff element, sprinkler with one level of orifices, high-pressure fuel feed channel, high-pressure fuel pump, fuel tank and priming pump, all being hydraulically communicated. It is equipped with two controlled mechanical valves with rods. Said hydraulic atomiser comprises needle and sleeve aligned therewith and with two levels of orifices. It incorporates low-pressure hydro-storage, high-pressure control valve, separate high-pressure fuel pump for every atomiser connected at outlet therewith and, via high-pressure control valve, with said low-pressure hydro-storage and, at inlet, with said low-pressure hydro-storage and displacement multiplexer fuel tank and fast-action reversible mechanical drive. Control chamber above needle of every atomiser is communicated with low-pressure hydraulic accumulator via channel isolated by first mechanical valve. Control chamber above needle of every atomiser is communicated with low-pressure hydraulic accumulator via channel isolated by second mechanical valve. Second spring-loaded mechanical valve can displace to top position jointly with first valve at upper displacement section owing to engagement there between. First said valve is connected by lever with rod with fast-operation reversing mechanical drive. Said drive has at least one plate for one cylinder with convex constant-radius definite-length surface with at least one skew. Said drive has the shaft engaged with crankshaft with at least one shaped cam with at least two identical height micro shapes to allow pre-injection and injection via first level orifice and at least one larger-height micro shape for pre-injection and injection after via first- and second-level orifices. Said micro shapes have leading edge parallel with needle axis and trailing edge parallel with plate end convex surface skew in adjustment of injection interval. At injection duration adjustment every plate can displace along rod and needle axes and is engaged either directly or via multiplexer with spring-loaded rod. The latter is engaged with first and second mechanical valves, both being engaged at top displacement part. Every plate can displace in the plane perpendicular or inclined to needle and stem axes and is splined to stem relative to which displaces the plate.

EFFECT: better dynamics of fuel feed, higher indicated efficiency and controlled injection using simple mechanical means.

2 cl, 4 dwg