Fuel distributor

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engine fuel feed systems. A fuel distributor (1) is provided, primarily intended for fuel injection systems in an internal combustion engine with compression of the working mixture and its forced ignition, and having a body (6) and at least one clutch (10) made of at least one plastic. A fuel cavity (7) is formed in the housing (6) of the fuel distributor. In addition, a through channel (20) is provided in the fuel distributor housing (6) at the location of the coupling (10), which on one side communicates with the fuel cavity (7) in the housing (6), and on the other hand communicates with the hollow interior space (21) of the coupling (10). The coupling (10) has a sealing edge (22) with a central opening (24) therein, through which the through channel (20) enters the hollow inner space (21) of the coupling (10).

EFFECT: increasing the tightness of the fuel distributor design.

8 cl, 2 dwg

 



 

Same patents:

FIELD: mechanical engineering; diesel engines.

SUBSTANCE: invention relates to fuel systems of diesel engines. Proposed accumulator fuel system of diesel engine consists of fuel tank, fuel heater with thermostat, fuel fine filter, low-pressure fuel pump, cutoff electric valve, high-pressure fuel pump, pressure transmitter, high-pressure accumulator, pressure control electric valve, fuel cooler, electrohydraulic nozzles with step-up gears and ball hydraulic control valves and low-temperature air radiator. Fuel feed system is additionally furnished with low-pressure accumulator included into nozzle fuel return system and divided into two parts with restrictor placed in between. Return pipes from nozzles are connected to first part of low-pressure accumulator. Second part of low-pressure accumulator is connected through pressure control electric valve to fuel return system. fuel pressure in high-pressure accumulator under all operating conditions is maintained three-fold higher, as compared with pressure in low-pressure accumulator.

EFFECT: increased response of nozzles at cutoff, reduced fuel consumption for control, improved reliability and increased service life of nozzles of diesel engines with electromagnetic control.

1 dwg

FIELD: mechanical engineering; diesel engines.

SUBSTANCE: proposed fuel-feed accumulator system consists of fuel tank, fuel heater with thermostat, fine fuel filter, low-pressure fuel pump, cutoff electric valve, high pressure fuel pump, pressure transmitter, high-pressure accumulator, pressure regulating electric valve, fuel cooler, electrohydraulic nozzles and low-temperature air radiator. Fuel-feed system is furnished additionally with low-pressure accumulator placed in nozzle leak-off fuel system and divided into two parts with restrictor in between. Leak-off fuel pipes from nozzles are connected to first part of accumulator, and second part of accumulator is connected through non-return valve to fuel tank through fuel cooler. Non-return valve is adjusted to opening pressure not lower than 4-5 MPa.

EFFECT: provision of quick action of nozzles, reduced consumption of fuel for control, improved serviceability of fuel-feed system.

1 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to clamps holding fuel pressure regulator on cover of fuel-feed module. Proposed cover of fuel-feed module with fastening device for fuel pressure regulator in form of can consists of mounting plate with tongue and peripheral projecting from plate and having outer diameter equal to diameter of hole in fuel tank for module. Inner surface of cap is provided with stiffening ribs. Cover has also two pairs of unions, one pair being designed to drive in posts of intake chamber of unit of electric gasoline pump, and other pair provided with outer knurling is designed for connecting to unit of electric gasoline pump delivering fuel into internal combustion engine through one union, while other union is designed for connecting to unit of fuel pressure regulator to drain exceed fuel into fuel tank. Plug of wire bundle providing power supply to electric gasoline pump is formed by rectangular partition. Plate service for fastening socket connector of said wire bundle. Intake chamber is formed by cylindrical surface with mounting slots. On inner surface of chamber ring platform is formed projecting inwards for mounting and fixing of fuel pressure regulator by clamp. Fuel pressure regulator has cylindrical housing with flange and contact to remove static electricity.

EFFECT: facilitated labor-taking process of mounting and fastening of fuel pressure regulator, reduced cost of manufacture of fastening device, reduced level of vibration of fuel pressure regulator at operation of electric gasoline pump, reduced metal usage of fuel-feed module as a whole.

5 cl, 2 dwg

The invention relates to engine, in particular for fuel injection systems in diesel

FIELD: motors and pumps.

SUBSTANCE: device for fuel supply into nozzles 1 is offered, which contains a fuel accumulator 3, implemented as a pipe. Between the pipe 3 and the nozzles the tubular rods 6 are installed which have barrelled tips, located in funnels made in the pipe 3 and in housings of all nozzles. From another side of the pipe 3 the screws 11 are located which are installed in the cylinder head. These screws have axial holes for fuel flow, and from one end they have the threaded tip 13, and from another end - the barrelled tip 14 inserted into the funnel, made in the pipe 3.

EFFECT: simplification of the device and avoidance fuel pressure losses when fuel is supplied from the fuel accumulator to nozzles.

3 cl, 2 dwg

Steel fuel fed line // 2550297

FIELD: engines and pumps.

SUBSTANCE: invention can be used in fuel fed systems of internal combustion engines. The steel fuel fed line for petrol supply from the high pressure pump to a direct injection manifold in the system of the petrol engine with direct fuel injection is offered. Along the whole internal circumferential surface of the fuel fed line the layer of nickel coating with the thickness from 1 to 15 micrometers, and above the layer of anticorrosive film consisting of zinc coating layer or a layer of zinc-based alloying coating with the thickness from 0.1 to 8 micrometers and with the length to the position from D to 6D mm (where D - pipeline diameter) from the end of the fuel fed line to the inside is provided.

EFFECT: increase of resilience to corrosive fuels and ensuring reliability without damage of an internal combustion engine.

3 cl, 7 dwg, 1 tbl

FIELD: engines and pumps.

SUBSTANCE: pressure pipe of ICE fuel injection system comprises inner tune and outer tube aligned with the latter and spacer arranged between said inner and outer tubes to center them. Inner tune end face has, preferably, taper locating surface. Thread joint is furnished to position said spacer at inner tube at preset distance from said locating surface. Inner tube has a stop acting axially to interact with spacer counterstop. Fuel injection system includes set of fuel injectors and pipelines to force fuel at high pressure to injectors and to derive it therefrom. High-pressure pipelines are connected by pressure pipe to injectors in compliance with application claims 1 through 7.

EFFECT: ease of adjustment, accurate setting.

10 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed structure in large ICE comprises means of first pipe for fuel feed into at high pressure developed by system with common fuel line, into engine cylinder head, and means of second pipe for fuel feed at high pressure further inside cylinder head, into injector holder, for injection into engine cylinder. First end of second pipe means is connected with first pipe means while second end of second pipe means is directly connected with injector holder. Additionally, proposed structure comprises fastening means in threaded joint with cylinder head chamber first part for sealed fastening of first pipe means in injector holder. Note here that said fastening means locks increased part with appropriate reverse surface located in second pipe means. Chamber is communicated with injector holder via chamber second part while second pipe means are spaced from said chamber over its notable length between fastening means and injector holder. For better performances of second pipe means at thermal conditions change, definite deformation caused by fastening means is created to obtain minor bend of second pipe means with the help of selection of second pipe means length and second end making about 10-20 their diameters and by selection of chamber diameter to be 40-100% larger than that of second pipe means located therein.

EFFECT: higher reliability and simplified design.

8 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: fuel injection system with common fuel line comprises, at least, one pressure accumulator and fuel injectors. The latter are communicated with pressure accumulators to force fuel thereto via intake tubes with twin walls. Intake tube inner space receives pressurised fuel while outer space serves as fuel leaks accumulation channel. Besides this system comprises the system of fuel leaks accumulation. Said system has tap channels communicated with injectors and accumulation channel communicated with tap channels. Fuel leaks detector is connected with accumulation channel.

EFFECT: ruled out dirt leaks from fuel injectors.

8 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine (ICE) includes cylinders, fuel spray injectors (11-18) and at least two common high pressure fuel lines (R1, R2). Cylinders are grouped at least in two rows (B1, B2). Injectors (11-18) of one row (B1, B2) of cylinders are connected to different common high pressure fuel lines (R1, R2). Also, ICE version with cylinders grouped at least in two rows (B1, B2) in which each atomiser is connected to one of common fuel lines (R1, R2) is described. Each common fuel line (R1, R2) has its own high pressure pump and common fuel lines (R1, R2) are hydraulically connected to each other. Besides, there described is operation control method of ICE with several cylinders, the common fuel lines (R1, R2) of which are hydraulically connected to each other, at which fuel pressure in one common fuel line (R2) is controlled, and pressure is controlled in advance in the other common fuel line (R1).

EFFECT: reduction of pressure fluctuations in common high pressure fuel lines.

10 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed steel tube contains the following elements in wt %: Ca - 0.12-0.27; Si - 0.05-0.40; Mn - 0.8-2.0%, Fe and impurities making the rest. Note here that said impurities contain in wt %: Ca - 0001 or less, P - 0.02 or less and S - 0.01 or less. Note here that ultimate strength makes at least 900 N/mm2 while maximum diametre of nonmetallic inclusions at depth of at least 20 mcm from steel tube surface doe not exceed 20 mcm. Besides steel tube may contain one or more of following elements in wt %: Cr - 1% or less, Mo - 1% or less, Ti - 0.04% or less, Nb - 0.04 or less and V - 0.1% or less. Proposed method comprises the following stages: steel tube is first quenched at temperature not lower that that of Ac3 phase transition and tempered after quenching at temperature not higher than Ac1 phase transition temperature.

EFFECT: longer life, higher resistance and reliability.

FIELD: engines and pumps.

SUBSTANCE: fuel injection device for multi-cylinder diesel engine of locomotive includes common main line of the left-hand block, which is located near left-hand cylinder block; common main line of right-hand block, which is located near the right-hand cylinder block; LP fuel supply devices; multiple HP fuel pumps receiving the fuel at low pressure from LP fuel supply devices and those supplying fuel at high pressure to at least one of common main line of left-hand block and common main line of right-hand block; liquid cross junction for fuel supply between common main line of left-hand block and common main line of right-hand block. Each cylinder of left-hand block receives fuel from common main line of left-hand block through the appropriate fuel injection control device. Each cylinder of right-hand block receives fuel from common main line of right-hand block through the appropriate fuel injection control device. Multiple HP pumps interact with liquid cross junction, thus providing the supply of complete fuel flow for continuous operation of all cylinders in maximum operating conditions in case of failure of one of HP pumps. The formula also specifies internal combustion engine and modification method of multi-row, multi-cylinder diesel engine for locomotive for using the device with common fuel main line.

EFFECT: invention allows controlling the fuel supply to each cylinder with high accuracy and flexibility.

19 cl, 2 dwg

FIELD: metallurgy.

SUBSTANCE: steel consists in wt %: C: from 0.12 to 0.27, Si: from 0.05 to 0.40 and Mn: from 0.8 to 2.0, the rest is Fe and impurities of Ca, P and S. Contents of Ca are 0.001 % or less, P 0.02 or less and S: 0.01 or less. Steel additionally contains at least one element chosen from Cr: 1 % or less, Mo: 1 % or less, Ti: 0.04% or less, Nb: 0.04 % or less and V: 0.1 % or less. Maximal diametre of non-metallic inclusions present in at least in zone running from internal surface of steel tube to depth of 20 mcm is 20 mcm or less.

EFFECT: disclosed steel tube is not subjected to fatigue destruction and possesses increased fatigue life and high reliability due to high strength and high limit of internal pressure.

2 cl, 2 tbl, 1 ex

FIELD: engines and pumps.

SUBSTANCE: construction of connecting head of high pressure tubes for fuel injection includes the following on connecting end of thick-wall steel tube of smaller diametre with relatively small diametre: spherical mounting surface, section of annular flange located at some distance from mounting surface towards tube axis centre, and conical surface located in fact near spherical surface continued from mounting surface to the section of annular flange or to the place located in close proximity to section of annular flange, and converging to the end. Retaining nut is installed so that it directly or indirectly interacts with rear surface of annular flange section. In case of thick-wall steel tube of small diametre the ratio t (thickness)/D (outer diametre) <0.3, distance L1 in axial direction from the end of connecting head to rear surface of annular flange is 0.38 D to 0.6 D, spherical radius R of mounting surface is 0.45 D to 0.65 D, and outer diametre D1 of annular flange section is 1.2 D to 1.4 D. Internal peripheral surface of head has circuit of section in axial direction of tube, which is close to diametre of internal peripheral surface of steel tube in fact on flat cylindrical surface and/or conical surface. There proposed is the second version of construction of connecting head of high pressure tubes for fuel injection, which includes the following on connecting end of thick-wall steel tube of smaller diametre, with relatively small diametre: spherical mounting surface. In case of thick-wall steel tube of small diametre the ratio t (thickness)/D (outer diametre) ≥0.3, distance L1 in axial direction from the end of connecting head to rear surface of annular flange is 0.38 D to 0.7 D, spherical radius R of mounting surface is 0.45 D to 0.65 D, and outer diametre D1 of annular flange section is 1.2 D to 1.4 D, and internal peripheral surface of head has circuit of section in axial direction of the tube, which is close to diametre of internal peripheral surface of steel tube in fact on flat cylindrical surface and/or conical surface.

EFFECT: invention allows preventing formation of cracks in the section of cavity, which is formed during formation of head, formation of cracks due to cavitation erosion and creation of tensile stress related to formation of cavity, and provides resistance to fatigue damage.

18 cl, 17 dwg

FIELD: mechanical engineering; diagnostic facilities.

SUBSTANCE: invention relates to high-pressure fuel pipelines, test stands and diagnostic devices for fuel equipment of internal combustion engines. Proposed multipurpose damping high-pressure fuel pipeline consists of pipe with union nuts on its ends. Ends of pipe and said nuts are made for connecting both to pressure union o high-pressure fuel pump and to union of nozzle. Pipe is made elastic, in form of high-pressure hose. Ends of pipe are made rigid, in form of nipples with fitted-on union nuts. Nipples are hermetically connected with said hose.

EFFECT: provision of elastic, multipurpose damping high-pressure pipeline for test stand and diagnostic devices of internal combustion engine fuel injecting equipment.

7 cl, 3 dwg

FIELD: mechanical engineering; engines.

SUBSTANCE: proposed flat tubular liquid pressure fluctuation damper is used in hydraulic lines for damping fluctuations of fuel pressure in vehicle fuel lines and is provided with at least one elongated chamber whose cross section is small, as compared with its length, and changes steplessly or in step in length and in which at least part of wall in contact with liquid can flexibly deform under action of fluctuations of pressure in this liquid. Chamber is formed by thin walled tubular element with closed ends made of steel sheet. Supply fuel pipeline is provided with at least one flat tubular liquid pressure fluctuation damper.

EFFECT: provision of effective damping of fluctuations within wide range owing to stepless or stepped changing of cross section.

5 cl, 3 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to fuel supply devices of diesel engines. Proposed system contains high-pressure fuel pump connected with makeup main line and connected through delivery valve and high-pressure pipe with nozzle, additional channel and check valve. The latter is installed in nozzle body which is provided with additional check valve connected with additional channel. System contains also spool-type control valve, electric spark gap whose electrodes are arranged in nozzle body, pulse generator control circuit, pulse generator control unit, high-voltage wires and pulse generator to product high-voltage pulses at moment of injection of fuel in said cylinder.

EFFECT: improved reliability and serviceability of fuel supply system Of military vehicles under extreme conditions.

1 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to fuel equipment of internal combustion engines operating mainly on low-viscosity fuels and fuel mixtures of different composition. Proposed nozzle has body with device for fastening nozzle in cylinder head, overneedle space and threaded union projecting from cylinder head on internal combustion engine for connecting high-pressure fuel pipe from high-pressure pump. Spray tip with nozzle orifices is connected with body by spray tip nut. Needle with shank, differential flat and shutoff cone is arranged in spray tip forming underneedle space communicating through channels in spray tip and body with union for connecting high-pressure fuel pipe at one side, and with nozzle orifices at other side. Spindle arranged in body engages by first end with needle shank, and by second end, lower flange of spring. Upper flange of spring is made for engagement with adjusting nut in nozzle body. Spray tip nut is made of material whose thermal conductivity is higher than that of steel. Gasket for sealing nozzle in cylinder head hole is made in form of central gasket made of low-carbon steel arranged between two gaskets made of titanium alloy. Two disk springs are installed between end face parts of spray tip nut and device fastening nozzle to cylinder head. Spindle centering bushing is arranged in overneedle space of body. Shank of needle is made for engagement with first end of spindle through pair of spherical surfaces made on end faces of shank and first end of spindle. Upper and lower flanges of spring are made for engagement with adjusting nut and second end of spindle, respectively, thorough pair of spherical surfaces made on end faces of upper and lower flanges of adjusting nut and first end of spindle. Ring grooves made in spray tip and on side surface of needle provide periodical communication of over needle space with ring groove of needle through calibrated stepped channel in body. Threaded union projecting from cylinder head and designed for connecting high-pressure fuel pipe from high-pressure fuel pump is made in from of outer and inner pipes arranged coaxially relative to each other. Outer pipe is connected by its first end through first rubber gasket and thread with body, and by second end part through second rubber gasket, washer, first nut and first locknut it is hermetically connected with outer surface of cylinder head. External projections in contact with inner surface of outer pipe are made on outer surface of inner pipe. End face surface of outer projection made of first end of inner pipe presses shutoff cone of high-pressure fuel pipe arranged in space of inner pipe to body, thus providing hermetic connection of high-pressure pipe with channel in body. Second nut is installed on thread from end face of second end of outer pipe to engage with second end of inner pipe and provide pressing of inner pipe to high-pressure fuel pipe by means of second locknut.

EFFECT: improved reliability and increased service life of nozzle, provision of stability of fuel injection and facilitated operation and maintenance of internal combustion engines.

4 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: construction of connecting head of high pressure tubes for fuel injection includes the following on connecting end of thick-wall steel tube of smaller diametre with relatively small diametre: spherical mounting surface, section of annular flange located at some distance from mounting surface towards tube axis centre, and conical surface located in fact near spherical surface continued from mounting surface to the section of annular flange or to the place located in close proximity to section of annular flange, and converging to the end. Retaining nut is installed so that it directly or indirectly interacts with rear surface of annular flange section. In case of thick-wall steel tube of small diametre the ratio t (thickness)/D (outer diametre) <0.3, distance L1 in axial direction from the end of connecting head to rear surface of annular flange is 0.38 D to 0.6 D, spherical radius R of mounting surface is 0.45 D to 0.65 D, and outer diametre D1 of annular flange section is 1.2 D to 1.4 D. Internal peripheral surface of head has circuit of section in axial direction of tube, which is close to diametre of internal peripheral surface of steel tube in fact on flat cylindrical surface and/or conical surface. There proposed is the second version of construction of connecting head of high pressure tubes for fuel injection, which includes the following on connecting end of thick-wall steel tube of smaller diametre, with relatively small diametre: spherical mounting surface. In case of thick-wall steel tube of small diametre the ratio t (thickness)/D (outer diametre) ≥0.3, distance L1 in axial direction from the end of connecting head to rear surface of annular flange is 0.38 D to 0.7 D, spherical radius R of mounting surface is 0.45 D to 0.65 D, and outer diametre D1 of annular flange section is 1.2 D to 1.4 D, and internal peripheral surface of head has circuit of section in axial direction of the tube, which is close to diametre of internal peripheral surface of steel tube in fact on flat cylindrical surface and/or conical surface.

EFFECT: invention allows preventing formation of cracks in the section of cavity, which is formed during formation of head, formation of cracks due to cavitation erosion and creation of tensile stress related to formation of cavity, and provides resistance to fatigue damage.

18 cl, 17 dwg

FIELD: metallurgy.

SUBSTANCE: steel consists in wt %: C: from 0.12 to 0.27, Si: from 0.05 to 0.40 and Mn: from 0.8 to 2.0, the rest is Fe and impurities of Ca, P and S. Contents of Ca are 0.001 % or less, P 0.02 or less and S: 0.01 or less. Steel additionally contains at least one element chosen from Cr: 1 % or less, Mo: 1 % or less, Ti: 0.04% or less, Nb: 0.04 % or less and V: 0.1 % or less. Maximal diametre of non-metallic inclusions present in at least in zone running from internal surface of steel tube to depth of 20 mcm is 20 mcm or less.

EFFECT: disclosed steel tube is not subjected to fatigue destruction and possesses increased fatigue life and high reliability due to high strength and high limit of internal pressure.

2 cl, 2 tbl, 1 ex

FIELD: engines and pumps.

SUBSTANCE: fuel injection device for multi-cylinder diesel engine of locomotive includes common main line of the left-hand block, which is located near left-hand cylinder block; common main line of right-hand block, which is located near the right-hand cylinder block; LP fuel supply devices; multiple HP fuel pumps receiving the fuel at low pressure from LP fuel supply devices and those supplying fuel at high pressure to at least one of common main line of left-hand block and common main line of right-hand block; liquid cross junction for fuel supply between common main line of left-hand block and common main line of right-hand block. Each cylinder of left-hand block receives fuel from common main line of left-hand block through the appropriate fuel injection control device. Each cylinder of right-hand block receives fuel from common main line of right-hand block through the appropriate fuel injection control device. Multiple HP pumps interact with liquid cross junction, thus providing the supply of complete fuel flow for continuous operation of all cylinders in maximum operating conditions in case of failure of one of HP pumps. The formula also specifies internal combustion engine and modification method of multi-row, multi-cylinder diesel engine for locomotive for using the device with common fuel main line.

EFFECT: invention allows controlling the fuel supply to each cylinder with high accuracy and flexibility.

19 cl, 2 dwg

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