CN104895720A - Fuel injection valve - Google Patents

Abstract

The invention discloses a heat conductivity sheet material for crimping of LED chips, which is characterized by obtaining from stacking silicon layers on two surfaces of the heat resistance resin; the thickness of the composite sheet material is smaller than 100 mum; the organic silicon layer is condensate of the silicon-rubber composition; the silicon rubber composition contains organic polysiloxane shown in the (A) formula (I) R1aSiO (4-a)/2 (I) R1 as monovalent hydrocarbon, and at least 2 to 1 molecules in aliphatic unsaturated group. A positive number is 1.95 ~ 2.05) (B) from the silica, zinc oxide, magnesium oxide, aluminum oxide, titanium dioxide to select at least one kind of metal oxide, platinum catalyst (C - 1), (C - 2) organic hydrogen polysiloxane. The invention can uniformly apply pressure while conducting heat, enables the small LED chip to be not polluted when the small LED chip is crimped with the substrate and guarantee the accuracy crinping.

Description

Fuelinjection nozzle

Technical field

The present invention relates to the cycle fuel that generates the flowing on one side of cycle on one side in the upstream of fuel orifice and from the Fuelinjection nozzle of fuel orifice injection.

Background technique

As the background technique of the art, be known to the Fuelinjection nozzle that Japanese Unexamined Patent Publication 2004-278464 publication (patent documentation 1) is recorded.This Fuelinjection nozzle has the valve base part being formed with valve seat, be combined in the access panels on the front-end face of valve base part and jet tray with overlapping successively, jet tray is equipped with the multiple fuel orifices configured from the axis bias of valve seat, access panels is formed and distributes the fuel that have passed valve seat the guiding road guided to multiple fuel orifice, wherein, access panels guides the heavy section on road by having, and formed by the thinner wall section of the ring-type on all-round the front-end face being welded on the valve base part be connected with the periphery of this heavy section with the thickness of slab thinner than heavy section together with jet tray, and jet tray is made up of (with reference to summary) the uniform flat board of thickness of slab.In patent documentation 1, list as problem and a kind of Fuelinjection nozzle is provided, the fuel between valve base part and jet tray can be made to guide the formation on road to become easy, and reliably and the sealing (with reference to 0005 section) easily carried out between valve base part and jet tray.

In addition, in patent documentation 1, (following as concrete example, be called the 1st past case), describe a kind of Fuelinjection nozzle, the front-end face of access panels is made up of tabular surface, and the jet tray be made up of the uniform flat board of each several part thickness of slab is formed with the tabular surface of access panels (with reference to 0035 section) with overlapping.In addition, the multiple longitudinal passage of above-mentioned guiding route, formed (with reference to 0036 section) with multiple vortex chambers of the downstream of multiple cross walkway of the channel-shaped of radial extension and cross walkway tangentially opening outside radial direction from longitudinal passage.In this Fuelinjection nozzle, the bottom surface of cross walkway and the bottom surface of vortex chamber relative to valve seat axes normal formed (with reference to Fig. 2).

And, in patent documentation 1, describe a kind of Fuelinjection nozzle, concrete example as other is (following, be called the 2nd past case), two inclined-planes that the coincidence face of access panels and jet tray is tilted with V-shaped by the axis relative to valve seat are formed, and multiple fuel orifice are divided into two groups relative to the mutual tilted configuration in opposite direction of the axis of valve seat, change the fuel injection direction (with reference to 0060-0061 section) of two groups of fuel orifices.In this Fuelinjection nozzle, the coincidence face of access panels and jet tray tilts with V-shaped, thus, even if vertically wear fuel orifice on the working surface of the uniform jet tray of thickness of slab, also can form the fuel orifice tilted relative to the axis of valve seat.

[prior art document]

[patent documentation]

[patent documentation 1] Japanese Unexamined Patent Publication 2004-278464 publication

When the direction burner oil tilted to the axis (central axis of Fuelinjection nozzle) relative to valve seat, the central axis of fuel orifice is made to tilt to form fuel orifice relative to the axis of valve seat.

In above-mentioned 2nd past case that patent documentation 1 is recorded, for fuel injection direction is divided into two directions, two inclined-planes that the coincidence face of access panels and jet tray is tilted with V-shaped by the axis relative to valve seat are formed.In such a configuration, relative to the fuel orifice of vortex chamber's precision positioned channel plate side well of access panels side, and, for preventing the fuel leakage from cross walkway, needing correctly to be formed the V-shaped of access panels front-end face and the V-shaped of jet tray and locating.Thus, the deterioration of the processability of each plate and the deterioration of assembling performance and productivity is caused.

On the other hand, as the structure injection direction of cycle fuel being divided into multiple directions, in above-mentioned 1st past case that patent documentation 1 is recorded, under the state making the bottom surface of vortex chamber relative to the axes normal of valve seat, multiple fuel orifice is tilted with different amount.In such a configuration, the bottom surface (the jet tray face of the inlet side opening of fuel orifice) of vortex chamber and the central axis angulation of fuel orifice are than 90 ° of the earth skews.In this situation, in vortex chamber, the cycle center being applied in the fuel of cycle power offsets from the central axis of fuel orifice, thus cycle is on one side while the fuel of flowing along the all-round flowing of the inner peripheral surface of fuel orifice (internal face), can not be peeled off from the inner peripheral surface of fuel orifice in a part for circumference.Specifically, when observing fuel orifice from its inlet side (upstream side), in the scope can observed from the inlet opens face the inner peripheral surface of fuel orifice, cycle fuel is applied in and flows in tension, in the scope that can not observe (becoming shade and the scope that can not see), cycle fuel is peeled off from inner peripheral surface.Thus, perfect liquid film can not be formed in fuel orifice, be hindered from the pelletizing of the fuel of fuel orifice injection.

In above-mentioned 2nd past case, the bottom surface (lower surface) of vortex chamber and the central axis angulation of fuel orifice become 90 °, thus can not produce cycle fuel and peel off so above-mentioned problem from the inner peripheral surface of fuel orifice.In addition, in patent documentation 1, do not consider about such problem.

Summary of the invention

The object of this invention is to provide a kind of Fuelinjection nozzle, cycle fuel is sprayed in the direction that can tilt towards the central axis relative to Fuelinjection nozzle, and the pelletizing of fuel is excellent, and productivity is high.

For achieving the above object, Fuelinjection nozzle of the present invention, the downstream side of the valve seat abutting/leave at valve body has: fuel orifice; Cycle room, offers the entrance of described fuel orifice and around described entrance, has the cycle stream of fuel; Cross walkway, to described cycle room supply fuel, to the front-end face that major general is formed with described fuel orifice, the plate-shaped member of the bottom surface of described cycle room and the bottom surface of described cross walkway is engaged in the spray nozzle part main body side with described valve seat, wherein, the abutting part of described plate-shaped member and described spray nozzle part main body side front-end face is made up of plane, bottom surface, described cycle room relative to described abutting part planar tilt formed, and described fuel orifice and described cycle room plane perpendicular ground formed.

The effect of invention

According to the present invention; a kind of Fuelinjection nozzle can be provided; bottom surface, cycle room relative to the abutting part between spray nozzle part main body side front-end face planar tilt formed; and fuel orifice and cycle room plane perpendicular ground are formed; thus; cycle fuel is sprayed in the direction that can tilt towards the central axis relative to Fuelinjection nozzle, and the pelletizing of fuel is excellent, and productivity is high.

Accompanying drawing explanation

Fig. 1 is the longitudinal section in the cross section of the valve shaft heart (central axis) represented along Fuelinjection nozzle of the present invention.

Fig. 2 is the 1st embodiment about Fuelinjection nozzle of the present invention, observes from the inlet side (the II-II direction of arrow of Fig. 1) of fuel orifice the plan view being formed with the spray nozzle board 21a of fuel orifice.

Fig. 3 is the 1st embodiment about Fuelinjection nozzle of the present invention, the sectional view of (spray nozzle part) near the III-III direction of arrow inspecting valve portion shown in Fig. 2 and fuel injection portion.

Fig. 4 is the sectional view representing the fuel orifice of the spray nozzle board shown in Fig. 2 and the vicinity of cycle path (cycle room, cross walkway) enlargedly.

Fig. 5 represents the plan view near the fuel orifice of the spray nozzle board shown in Fig. 3 and cycle path enlargedly.

Fig. 6 is the figure of the summary of the variable height of each position representing the bottom surface, vortex chamber shown in Fig. 5 and cross walkway bottom surface.

Fig. 7 be represent using the angle of inclination of cycle room as parameter, relative to cycle room angular orientation the figure of variance ratio of flow path cross sectional area.

Fig. 8 is the sectional view in the VIII-VIII cross section representing Fig. 5.

Fig. 9 A is the figure representing the state making the central axis of fuel orifice relative to the cycle fuel when inclined bottom surface of cycle room.

Fig. 9 B be represent the central axis of fuel orifice relative to cycle room plane perpendicular form when the figure of state of cycle fuel.

Figure 10 represents that the longitudinal axis is the variance ratio of the particle diameter of the fuel sprayed from fuel orifice and be formed in the variance ratio of thickness of the liquid film in fuel orifice and the variance ratio of particle diameter and thickness is the figure of the variation characteristic at the angle of inclination of cycle room relative to transverse axis.

Figure 11 represents the figure of the cycle flow velocity variance ratio of fuel relative to the variation characteristic at the angle of inclination of cycle room.

Figure 12 is the 2nd embodiment about Fuelinjection nozzle of the present invention, represents and the sectional view from the III-III direction of arrow inspecting valve base member of Fig. 2 and the same cross section of the sectional view of spray nozzle board.

Figure 13 is the 3rd embodiment about Fuelinjection nozzle of the present invention, represents and the sectional view from the III-III direction of arrow inspecting valve base member of Fig. 2 and the same cross section of the sectional view of spray nozzle board.

Figure 14 is the 4th embodiment about Fuelinjection nozzle of the present invention, represents and the sectional view from the III-III direction of arrow inspecting valve base member of Fig. 2 and the same cross section of the sectional view of spray nozzle board.

Figure 15 is the sectional view of the internal-combustion engine having carried Fuelinjection nozzle of the present invention.

[explanation of reference character]

1 ... Fuelinjection nozzle, 1a ... the valve shaft heart (central axis), 2 ... fuel supplying mouth, 3 ... fuel flow path, 4 ... annular recessed portion (annular slot portion), 5 ... cylinder, 5a ... large-diameter portion, 5b ... minor diameter part, 5c ... magnetic restriction, 5d ... lip part (wide diameter portion), 7 ... valve portion, 9 ... drive portion, 11 ... O shape ring, 13 ... fuel filter, 13a ... plug, 13b ... framework, 13c ... filter cleaner main body, 15 ... valve base part, 15a ... valve body accepting hole, 15b ... valve seat, 15c ... guide surface, 15d ... wide diameter portion, 15t ... forward end end face, 17 ... valve body, 17a ... cut sides, 19 ... laser bonding, 21 ... fuel injection portion, 21n ... spray nozzle board, 21nu ... upper-end surface, 21nb ... lower end surface, 23 ... laser weld, 24 ... laser bonding, 25 ... fixed iron core, 25a ... through hole, 27 ... movable piece, 27a ... movable core, 27b ... minor diameter part, 27c ... recess, 27d ... opening portion, 27e ... circumferentia, 27f ... through hole, 29 ... electromagnetic coil, 31 ... bobbin, 33 ... yoke, 33a ... large-diameter portion, 33b ... minor diameter part, 33c ... annular recessed portion, 34 ... annular slot, 35 ... regulator (adjustment piece), 37 ... back pressure chamber, 39 ... spring (disc spring), 41 ... connector, 43 ... connector stitch, 45 ... wiring part, 46 ... O shape ring, 47 ... resin housing, 47a ... terminal side end, 49 ... protector, 49a ... lip part, 100 ... internal-combustion engine, 101 ... engine cylinder-body, 102 ... cylinder, 103 ... suction port, 104 ... relief opening, 105 ... suction valve, 106 ... outlet valve, 107 ... charge air flow path, 107a ... inlet-side end portions, 108 ... suction tude, 109 ... the assembly department of Fuelinjection nozzle 1, 109a ... insert port, 110 ... fuel distribution tube, 200, 200-1, 200-2, 200-3 ... longitudinal passage, 200b ... bottom surface, 200c ... side (side wall surface), 200u ... upstream extremity, 210, 210-1, 210-2, 210-3 ... cycle path, 211, 211-1, 211-2, 211-3 ... cross walkway, 211b ... bottom surface, 211c, 211-1c ... side (side wall surface), 211ce ... end face (upper surface), 211co, 211ci ... sidewall (side), 212, 212-1, 212-2, 212-3 ... cycle room, 212b, 212b ' ... bottom surface, 212c, 212-1c, 212-2c, 212-3c ... inner circle wall (sidewall), 212cc ... fillet part, 212ce ... end face (upper surface), 212cl ... the end of downstream side of sidewall 212c, 212cu ... the upstream-side-end of sidewall 212c, 212p1, 212p2 ... the cross section of cycle stream, 213 ... the curved part of bottom surface, 220, 220-1, 220-2, 220-3, 220 ' ... fuel orifice, 220a, 220a ' ... central axis, 220o ... exit opening, 220i ... inlet opens, 230 ... recess, 230b ... bottom surface, 300 ... fuel introduction hole, 400 ... intermediate plate.

Embodiment

About embodiments of the invention, Fig. 1 to Figure 13 is used to be described.

[embodiment 1]

About the 1st embodiment of the present invention, Fig. 1 to Fig. 9 is used to be described.

With reference to Fig. 1, the overall structure about Fuelinjection nozzle 1 is described.Fig. 1 is the longitudinal section in the cross section (longitudinal section) represented along the central axis 1a of Fuelinjection nozzle 1.Central axis 1a is consistent with the axle center (the valve shaft heart) of the movable piece 27 being integrally formed with valve body 17 described later, consistent with the central axis of cylinder 5 described later.In addition, central axis 1a is also consistent with the axis of valve seat 15b described later.

Fuelinjection nozzle 1 is within it roughly consisted of along the mode of central axis 1a with fuel flow path 3 cylinder 5 of metallic material.Cylinder 5 is the metal materials using the magnetic stainless steel of tool etc., by the pressure processing of drawing processing etc., is formed as the stepped shape of direction band of centrally axis 1a.Thus, the diameter of the end side 5a of cylinder 5 becomes large relative to the diameter of another side 5b.In FIG, the upside that the large-diameter portion 5a being formed in end side becomes the minor diameter part 5b being formed in another side is shown.

In FIG, upper end portion (upper end side) is called base end part (terminal side), underpart (lower end side) is called front end (forward end).Base end part (terminal side) and the such naming method of front end (forward end) are based on the flow direction of fuel.In addition, the upper and lower relation illustrated in this specification take Fig. 1 as benchmark, and it doesn't matter for above-below direction when carrying with Fuelinjection nozzle 1 internal combustion engine.

The base end part of cylinder 5 is provided with fuel supplying mouth 2, this fuel supplying mouth 2 is provided with the fuel filter 13 for removing the foreign matter being mixed into fuel.Fuel filter 13 is made up of the plug 13a of tubular, the framework 13b of resin material and cancellous filter cleaner main body 13c.The resin material of framework 13b is such as nylon, fluorine-type resin etc., and is shaped integratedly with plug 13a.Filter cleaner main body 13c is installed on framework 13b, and plug 13a is pressed into the inner side of the large-diameter portion 5a of cylinder 5, is fixed on the base end part of cylinder 5 thus.

The base end part of cylinder 5 forms bending lip part (wide diameter portion) 5d in the mode expanding towards radial outside, and the annular recessed portion (annular slot portion) 4 formed at the terminal side end 47a by curved part 5d and housing 47 is configured with O shape ring 11.

The valve portion 7 formed by valve body 17 and valve base part 15 is configured with at the front end of cylinder 5.

Valve base part 15 has the valve body accepting hole 15a of the band ladder of collecting valve body 17, the conical surface being formed at valve body accepting hole 15a midway constitutes valve seat 15b, forms at the upstream side (terminal side) of this valve seat 15b the guide surface 15c being guided valve body 17 by the direction of centrally axis 1a.

Valve seat 15b leaves/abuts by valve body 17 parts carrying out the opening and closing of fuel passage.Sometimes also the conical surface being formed with valve seat 15b is called valve seat 15b.In addition, at the upstream side of guide surface 15c, formed by towards the expanding wide diameter portion 15d of upstream side.Wide diameter portion 15d makes the assembling of valve body 17 become easy, and expands fuel passage cross section.

Valve base part 15 is inserted into inside the forward end of cylinder 5, and is fixed in cylinder 5 by laser bonding.Laser bonding 19 implements in all-round scope from the outer circumferential side of cylinder 5.Valve body accepting hole 15a is that valve base part 15 is run through in the direction of centrally axis 1a, spray nozzle board 21n, to be formed in the mode of the opening of the forward end of valve base part 15 by valve body accepting hole 15a blocking, is installed in end face (hereinafter referred to as the front-end face) 15t of the forward end of valve base part 15.In the present embodiment, the fuel injection portion 21 of spraying cycle fuel is constituted by valve base part 15 and spray nozzle board 21n.Spray nozzle board 21n is fixed by carrying out laser bonding for valve base part 15.Laser weld 23 is for surrounding the spray-hole forming region being formed with fuel orifice 220-1,220-2,220-3 (with reference to Fig. 2), and around this spray-hole forming region.Valve base part 15 also on the basis inside the forward end being pressed into cylinder 5, can be fixed in cylinder 5 by laser bonding.

In the present embodiment, valve body 17 uses in spherical ball valve.Thus, the position relative with guide surface 15c in valve body 17, is circumferentially provided with multiple cut sides 17a at spaced intervals, constitutes fuel passage by this cut sides 17a.Valve body 17 can also be formed with other places except ball valve.Also such as needle-valve can be used.

In the present embodiment, comprise the valve portion 7 of valve base part 15 and valve body 17 and spray nozzle board 21n and constitute spray nozzle part for burner oil.On the front-end face of spray nozzle part main body side forming valve portion 7, be combined with fuel orifice 220 described later, cycle path 210 (cross walkway 211 and cycle room 212) and be formed with the spray nozzle board 21n of longitudinal passage 200.Spray nozzle board 21n is made up of the uniform plate-shaped member of thickness of slab (flat board).As the plate-shaped member be engaged on the front-end face of spray nozzle part main body side, not only comprise spray nozzle board 21n, also can comprise other plates.In this situation, spray nozzle board 21n through-thickness can also be divided into multiple plate.

At the intermediate portion of cylinder 5, be configured with the drive portion 9 for driving valve body 17.Drive portion 9 is made up of electromagnetic actuator.Specifically, drive portion 9 is formed by with lower component: fixed iron core 25, is fixed on the inside (inner circumferential side) of cylinder 5; Movable piece (movable member) 27, is configured in forward end in the inside of cylinder 5 relative to fixed iron core 25, can the direction of centrally axis 1a move; Electromagnetic coil 29, separates relative position, micro-gap δ ground at fixed iron core 25 with the movable core 27a being formed in movable piece 27, is inserted in the outer circumferential side of cylinder 5 outward; Yoke 33, at the outer circumferential side of electromagnetic coil 29, covers electromagnetic coil 29.Movable core 27a, fixed iron core 25 and yoke 33 constitute for the closed magnetic circuit by the magnetic flux flows produced that is energized to electromagnetic coil 29.Magnetic flux by micro-gap δ, but decreases the Magnetic leakage flux in the part of micro-gap δ, flowing in cylinder 5, thus in position corresponding to the micro-gap δ with cylinder 5, is provided with magnetic restriction 5c.This magnetic restriction 5c can be formed for the unmagnetize process of cylinder 5, or is made up of the annular recessed portion on the outer circumferential face being formed in cylinder 5.

Electromagnetic coil 29 is wrapped in and is formed as on the bobbin 31 of tubular by resin material, and is inserted in the outer circumferential side of cylinder 5 outward.Electromagnetic coil 29 is connected electrically in the connector stitch 43 be arranged on connector 41 by wiring part 45.Connector 41 is connected with not shown drive circuit, and by connector stitch 43 and wiring part 45, driving current is energized to electromagnetic coil 29.

Fixed iron core 25 is formed by magnetic metal material.Fixed iron core 25 is formed as tubular, and the through hole 25a of central part is run through in the direction with centrally axis 1a.Fixed iron core 25 is pressed into fixed the terminal side of the minor diameter part 5b in cylinder 5, and is positioned at the intermediate portion of cylinder 5.By arranging large-diameter portion 5a at the terminal side of minor diameter part 5b, the assembling of fixed iron core 25 becomes easy.Fixed iron core 25 also can be fixed in cylinder 5 by welding, also can be used together welding and is pressed into and is fixed in cylinder 5.

Movable piece 27 is formed with large-diameter portion 27a at terminal side, and this large-diameter portion 27a constitutes the movable core 27a relative with fixed iron core 25.Minor diameter part 27b is formed with, in the front end of this minor diameter part 27b by being welded with valve body 17 in the forward end of movable core 27a.This minor diameter part 27b constitutes the joint 27b connecting movable core 27a and valve body 17.In the present embodiment, movable core 27a and joint 27b one (parts formed by same material) is formed, but also can engage two parts formations.In the present embodiment, using valve body 17 as with movable piece 27 phase independently constituting component, but valve body 17 also can be made to be contained in a part for movable piece 27.In addition, by making the outer circumferential face of movable core 27a contact with the inner peripheral surface of cylinder 5, guide the movement in the movable piece 27 centrally direction (open and close valve direction) of axis 1a.For reducing the slip resistance between the outer circumferential face of movable core 27a and the inner peripheral surface of cylinder 5, also can circumferentially form the teat of ring-type in the position (outer circumferential face of movable core 27a) shown in reference character 27g.

On movable core 27a, be formed with the recess 27c at the end face opening relative with fixed iron core 25.The bottom surface of recess 27c is formed the circumferentia 27e of the spring seat becoming spring (disc spring) 39.Be formed with centrally axis 1a in the inner circumferential side of circumferentia 27e and extend through the through hole 27f of the forward end end of minor diameter part (joint) 27b.In addition, on minor diameter part 27b, be formed with opening portion 27d in side.Back pressure chamber 37 is formed between the outer circumferential face and the inner peripheral surface of cylinder 5 of minor diameter part 27b.Through hole 27f is at the bottom surface opening of recess 27c, opening portion 27d is at the outer circumferential face opening of minor diameter part 27b, thus, in the inside of movable piece 27, constitute the fuel flow path 3 that the base end part side of movable piece 27 is communicated with the back pressure chamber 37 in the side face being formed in movable piece 27.

Stride across the through hole 25a of the fixed iron core 25 and recess 27c of movable core 27a, disc spring 39 is set up with compressive state.Disc spring 39 plays function as the direction abutted with valve seat 15b to valve body 17 (valve closing direction) to the force application part that movable piece 27 exerts a force.Be configured with regulator (adjustment piece) 35 in the inner side of the through hole 25a of fixed iron core 25, the terminal side end of disc spring 39 abuts with the forward end end face of regulator 35.By adjusting the position in the through hole 25a of the regulator 35 on the direction of centrally axis 1a, adjust the active force of disc spring 39 pairs of movable pieces 27 (i.e. valve body 17).

The fuel flow path 3 of central part is run through in the direction that regulator 35 has a centrally axis 1a.

Fuel is after adjusting the fuel flow path 3 flowing through joint device 35, and the fuel flow path 3 to the forward end part of the through hole 25a of fixed iron core 25 flows, and flows to the fuel flow path 3 be formed in movable piece 27.

Yoke 33 can be formed by the magnetic metallic material of tool, and is also used as the shell of Fuelinjection nozzle 1.Yoke 33 is formed as the tubular of the band ladder with large-diameter portion 33a and minor diameter part 33b.Large-diameter portion 33a covers the cylindrical shape in ground, periphery of electromagnetic coil 29, is formed with the diameter minor diameter part 33b less than large-diameter portion 33a in the forward end of large-diameter portion 33a.Minor diameter part 33b is pressed into the periphery of the minor diameter part 5b of cylinder 5.Thus, the inner peripheral surface of minor diameter part 33b and the outer circumferential face close contact of cylinder 5.Now, the outer circumferential face at least partially across movable core 27a of the inner peripheral surface of minor diameter part 33b is relative with cylinder 5, and reduces the magnetic resistance of the closed magnetic circuit in this opposite segments.

The outer circumferential face of the forward end end of yoke 33 is circumferentially formed with annular recessed portion 33c.Thinner wall section on the bottom surface being formed at annular recessed portion 33c, yoke 33 and cylinder 5 are engaged in all-round scope by laser bonding 24.The forward end end of yoke 33 is positioned at forward end relative to the terminal side end of valve base part 15.Thus, yoke 33 and valve base part 15 are arranged in the scope of repetition on the direction of centrally axis 1a, and strengthen the front end of cylindrical portion 5.In addition, the laser weld 19 of valve base part 15 is positioned at side more forward than the forward end end of yoke 33, and the assembling sequence for valve base part 15 and yoke 33 can not produce restriction.

Outside the front end of cylinder 5, be inserted with the protector 49 of the cylindrical shape with lip part 49a, the protected device 49 of front end of cylinder 5 is protected.Protector 49 covers the top of the laser weld 24 of yoke 33.

Define annular slot 34, O shape ring 46 by the lip part 49a of protector 49, the minor diameter part 33b of yoke 33 and the large-diameter portion 33a of yoke 33 and the ladder surface of minor diameter part 33b and inserted in annular slot 34 outward.O shape ring 46 is when Fuelinjection nozzle 1 is installed on internal-combustion engine, guarantees that liquid-tight and airtight Sealing plays function between the outer circumferential face as the minor diameter part 33b in the inner peripheral surface of insert port 109a (with reference to Figure 13) being formed at this side of internal-combustion engine and yoke 33.

Near from the intermediate portion of Fuelinjection nozzle 1 to terminal side end, the resin housing 47 be molded covers.The forward end end of resin housing 47 covers a part for the terminal side of the large-diameter portion 33a of yoke 33.In addition, resin housing 47 covers wiring part 45, forms connector 41 by resin housing 47.

Below, the action about Fuelinjection nozzle 1 is described.

When being energized (namely not having driving current to flow) to electromagnetic coil 29, movable piece 27 is exerted a force by valve closing direction by disc spring 39, and valve body 17 becomes the state abutting (taking a seat) with valve seat 15b.In this situation, between the forward end end face and the terminal side end face of movable core 27a of fixed iron core 25, there is gap delta.In addition, in the present embodiment, this gap delta is equal with the stroke of movable piece 27 (i.e. valve body 17).

To electromagnetic coil 29 be energized and driving current flowing time, in the closed magnetic circuit be made up of movable core 27a, fixed iron core 25 and yoke 33, produce magnetic flux.By this magnetic flux, produce magnetic attraction being relatively fixed with clipping gap delta between unshakable in one's determination 25 and movable core 27a.This magnetic attraction overcome active force that disc spring 39 produces, fuel pressure that movable piece 27 act on to valve closing direction etc. with joint efforts time, movable piece starts to move to valve opening position.When valve body 17 leaves from valve seat 15b, between valve body 17 and valve seat 15b, form gap (fuel flow path), start the injection of fuel.In the present embodiment, movable piece 27 only moves the distance δ equal with gap delta to valve opening position, and when movable core 27a abuts with fixed iron core 25, movable core 27a stops the movement to valve opening position, and valve opening also reaches static state.

When cutting off the energising of electromagnetic coil 29, magnetic attraction reduces, and disappears soon.In this stage, when magnetic attraction becomes less than the active force of disc spring 39, movable piece 27 starts to move to valve closing direction.When valve body 17 abuts with valve seat 15b, valve body 17 makes valve portion 7 valve closing and reaches static state.

In addition, for reducing the extruding force of effect between movable core 27a and fixed iron core 25, sometimes projection is set on the end face relative with fixed iron core 25 of movable core 27a.Under such circumstances, the displacement distance (stroke) of valve body 17 becomes the size deducting rising height from gap delta.In addition, the blocked part of the movement to valve opening position limiting movable piece 27 before movable core 27a contacts with fixed iron core 25 is sometimes also provided with.

Below, with reference to Fig. 2 to Fig. 7, about structure and the fuel flowing of valve portion 7 and fuel injection portion 21, be described in detail.

Fig. 2 represents that the inlet side (the II-II direction of arrow of Fig. 1) from fuel orifice observes the plan view of spray nozzle board 21n.This plan view is the plan view of this side of 21nu, upper-end surface of spray nozzle board 21n.Upper-end surface 21nu is the face relative with the front-end face 15t of valve base part 15.In addition, the end face of opposition side relative to the 21nu of upper-end surface is called lower end surface 21nb.

Spray nozzle board 21n is formed longitudinal passage 200-1,200-2,200-3, cycle path 210-1,210-2,210-3 and fuel orifice 220-1,220-2,220-3.Longitudinal passage 200-1, cycle path 210-1 and fuel orifice 220-1 form an independently fuel passage, longitudinal passage 200-2, cycle path 210-2 and fuel orifice 220-2 form an independently fuel passage, longitudinal passage 200-3, cycle path 210-3 and fuel orifice 220-3 form an independently fuel passage respectively, constitute whole 3 groups of fuel passage.

3 groups of longitudinal passage 200-1,200-2,200-3, cycle path 210-1,210-2,210-3 and fuel orifice 220-1,220-2,220-3 are similarly formed respectively, but they are not distinguished, be described as longitudinal passage 200, cycle path 210 (cross walkway 211, cycle room 212) and fuel orifice 220.In each group when change structure, be suitably described.Longitudinal passage 200, cycle path 210 and fuel orifice 220 are not limited to 3 groups, also can arrange 2 groups, also can arrange more than 4 groups.Or, also 1 group of longitudinal passage 200, cycle path 210 and fuel orifice 220 only can be set, in this situation, also can obtain effect of the present invention.In the present embodiment, assuming that arrange to organize longitudinal passage 200, cycle path 210 and fuel orifice 220 and situation fuel injection direction being set to multiple directions more.

Cross walkway 211 from this side of center 21no of spray nozzle board 21n toward the outside all sides with radial setting.That is, cross walkway 211 is extended along the radial direction of spray nozzle board 21n.In addition, cross walkway 211 is connected to cycle room 212 in the mode that the center O of the inlet opens 220i (with reference to Fig. 5) relative to fuel orifice 220 is biased.In addition, in the present embodiment, the mode of intersecting at center 21no and spray nozzle board 21n with central axis 1a is formed Fuelinjection nozzle 1.

Inner circle wall (sidewall) 212c (212-1c, 212-2c, 212-3c) of cycle room 212 is to make to flow into the fuel side cycle of cycle room 212 while be formed as swirl shape close to the inlet opens i of fuel orifice 220 or the mode of its center O (with reference to Fig. 5) from cross walkway 211.

Longitudinal passage 213 is connected to the upstream extremity (center 21no side end) of cross walkway 211, supplies fuel to cross walkway 211.

Fig. 3 represents the sectional view of near the III-III direction of arrow inspecting valve portion 7 shown in Fig. 2 and fuel injection portion 21 (spray nozzle part).

In the present embodiment, spray nozzle board 21n is that the plate-shaped member be made up of plane both ends of the surface is formed, and upper-end surface 21nu is parallel with lower end surface 21nb.In addition, upper-end surface 21nu and lower end surface 21nb is made up of smooth face (plane or tabular surface) respectively.That is, spray nozzle board 21n is made up of the uniform flat board of thickness of slab.In addition, front-end face (lower end surface) 15t of valve base part 15 is also made up of smooth face (plane or tabular surface).Especially, in spray nozzle board 21n, upper-end surface 21nu is made up of plane, and thus, and the abutting part (bearing surface) between the front-end face 15t of valve base part 15 is made up of plane.Thus, the assembling operation to valve base part front-end face 15t of spray nozzle board 21n becomes easy, and productivity improves.In this situation, the abutting part at least between the front-end face 15t and the upper-end surface 21nu of spray nozzle board 21n of valve base part 15, forms plane.The plane (bearing surface) of the plane (bearing surface) being formed in the front-end face 15t of valve base part 15 and the upper-end surface 21nu being formed in spray nozzle board 21n needs not be continuous surface, also can by segmentations such as grooves.Under being formed in the divided situation of bearing surface of upper-end surface 21nu, in order to improve the assembling performance of spray nozzle board 21n, thus preferred divided multiple planar section is configured to phase co-altitude.And under considering the fluid-tight situation of fuel, preferred bearing surface is made up of continuous print plane.

Be formed at the longitudinal passage 200 of spray nozzle board 21n, cross walkway 211, cycle room 212 and fuel orifice 220 such as by through-thickness segmentation spray nozzle board 21n etc., multiple plate to be divided into and to form.Therefore, on spray nozzle board 21n, at least form fuel orifice 220, the bottom surface 212b of cycle room 212 and the bottom surface 211b of cross walkway 211.Also multiple plate can be combined assemble the spray nozzle board 21n with longitudinal passage 200, cross walkway 211, cycle room 212 and fuel orifice 220.

On valve base part 15, to form cone shape valve seat surface 15b towards the mode of downstream side undergauge.The downstream of valve seat surface 15b is connected to the fuel introduction hole 300 leading to cycle path 210, and the downstream of fuel introduction hole 300 is at the front-end face 15t opening of valve base part 15.In cycle this side of path 210, for accepting the supply of fuel from fuel introduction hole 300, the upstream extremity 200u of longitudinal passage 200 and the opening surface of fuel introduction hole 300 are relatively arranged.

Here, with reference to Fig. 2 and Fig. 3, the fuel flowing in valve portion 7 and fuel injection portion 21 is described.In addition, Fig. 3 represents that valve body 17 contacts and the state of valve closing with valve seat 15b, but about valve body 17 from valve seat 15b leave and valve opening fuel flowing be described.The fuel flowing into longitudinal passage 200 from fuel introduction hole 300 as indicated by arrow a 1 flows into cross walkway 211.Because cross walkway 211 is tangentially connected to cycle room 212, the inner circle wall 212c (212-1c, 212-2c, 212-3c) of cycle room 212 is formed with swirl shape, so the fuel A2 flowing into cycle room 212 from cross walkway 211 flows cycle room 212 be applied in cycle power.The fuel A3 flowing into fuel orifice 220 from cycle room 212 forms thin liquid film in fuel orifice 220.When liquid film is injected from fuel orifice 220, division becomes micronized drop, and forms the conical injected fuel spray of hollow.

Fig. 4 represent be exaggerated spray nozzle board 21n longitudinal passage 200, cycle path 210 (cross walkway 211 and cycle room 212) and fuel orifice 220 near the sectional view of spray nozzle board 21n.

Longitudinal passage 200 and be formed in the cross walkway 211 in its downstream side and cycle room (vortex chamber) 212 are formed in this side abutted with valve base part 15 of spray nozzle board 21n upper-end surface 21nu with channel-shaped.That is, the bottom surface 212b of the bottom surface 200b of longitudinal passage 200, the bottom surface 211b of cross walkway 211 and cycle room 212 is formed at spray nozzle board 21n.

In addition, side (side wall surface) 200c of longitudinal passage 200, side (side wall surface) 211-1c (with reference to Fig. 2) of cross walkway 211 and inner peripheral surface (side wall surface) 212c of cycle room 212 are formed at spray nozzle board 21n.Spray nozzle board 21n is engaged in the front-end face 15t of valve base part 15 as illustrated in fig. 3, thus, end face (upper surface) 211ce of cross walkway 211 and end face (upper surface) 212ce of cycle room 212 is made up of the front-end face 15t of valve base part 15.In addition, because the side of cross walkway 211 can not illustrate in the diagram, so use the reference character of the side 211-1c of the cross walkway 211-1 of Fig. 2 to be illustrated.The side of 3 cross walkway 211-1,211-2,211-3 is similarly formed, thus they is briefly described as 211c.

Spray nozzle board 21n is formed fuel orifice 220, and its entrance 220i is at the bottom surface 212b opening of cycle room 212.In addition, on the lower end surface 21nb of spray nozzle board 21n, be formed with the recess 230 that bottom surface 230b tilts relative to the central axis 1a of Fuelinjection nozzle 1.The outlet 220o of fuel orifice 220 is at the bottom surface 230b opening of recess 230.In addition, recess 230 is not to arrange, and the outlet 220o of fuel orifice 220 also can be made directly at the lower end surface 21nb opening of spray nozzle board 21n.

The mode that fuel orifice 220 tilts relative to the central axis 1a of Fuelinjection nozzle 1 with its central axis 220a is formed.In addition, the mode that recess 230 vertically intersects with its bottom surface 230b and the central axis 220a of fuel orifice 220 is formed.Thus, the exit opening 220o of fuel orifice 220 is rounded, and the length of the inner peripheral surface (internal face) of the fuel orifice 220 of restriction cycle fuel is circumferentially homogenized.Thus, the injected fuel spray of spraying from the outlet 220o of fuel orifice 220 can become perfect taper shape.

For making the injection direction of fuel towards prescribed direction, the central axis 220a of fuel orifice 220 is formed obliquely relative to the central axis 1a of Fuelinjection nozzle 1.In the present embodiment, 3 fuel orifices 220 are set, from each fuel orifice with the interval burner oil of equalization.And such as when being divided into two ground, directions burner oils, fuel orifice above to be multiplely made up of 2 or 4 or its, these multiple fuel orifices to be divided into 2 groups, the fuel orifice of same group is tilted to same direction.

In the present embodiment, the central axis 220a of fuel orifice 220 tilts relative to the central axis 1a of Fuelinjection nozzle 1, and the bottom surface 212b of cycle room 212 and the central axis 220a of fuel orifice 220 tilt orthogonally, relative to the plane (being called horizontal plane) orthogonal with central axis 1a.That is, bottom surface, cycle room 212b is inclined relative to horizontal, and fuel orifice central axis 220a is vertically formed relative to cycle room bottom surface 212b.Or fuel orifice central axis 220a tilts relative to central axis 1a, cycle room bottom surface 212b is vertically formed relative to fuel orifice central axis 220a.In this situation, cycle room bottom surface 212b angle of inclination with respect to the horizontal plane and fuel orifice central axis 220a are the angles larger than 0 ° relative to the angle of inclination of central axis 1a.

The central axis 220a of fuel orifice 220 relative to the central axis 1a of Fuelinjection nozzle 1, in addition, the bottom surface 212b of cycle room 212 with respect to the horizontal plane to same direction with same angular slope.In addition, the sidewall 212c of cycle room 212 is vertically formed the bottom surface 212b in cycle room 212.Thus, vertical with the bottom surface 212b of cycle room 212 and consistent through the central axis 212a at center (vortex core of cycle room 212) of the bottom surface 212b of cycle the room 212 and central axis 220a of fuel orifice 220.That is, the center of inlet opens (inlet opens face) 220i of fuel orifice 220 is consistent with the center of cycle room 212.The center of cycle room 212 refers to vortex core, and the situation that cycle room 212 is such as made up of helical curve refers to the center of helical curve.

In this manual, horizontal plane or substantially horizontal define as the orthogonal plane of the central axis 1a with Fuelinjection nozzle 1 or direction.Therefore, the horizontal plane used in this specification or substantially horizontal are not the plane orthogonal with vertical direction or direction.But, when along the central axis 1a of vertical direction configuration Fuelinjection nozzle 1, horizontal plane or the substantially horizontal plane orthogonal with vertical direction or direction consistent.In addition, in the present embodiment, the bearing surface between the front-end face 15t of the valve base part 15 and valve base part front-end face 15t of spray nozzle board 21n is made up of horizontal plane respectively.In addition, cross walkway bottom surface 211b is also made up of horizontal plane.

Fig. 5 represents the plan view near the inlet opens 220i amplifying cycle room 212, cross walkway 211 and fuel orifice 220.In addition, in Figure 5, the plan view inlet opens 220i of the bottom surface 212b of cycle room 212, the bottom surface 211b of cross walkway 211 and fuel orifice 220 being projected on horizontal plane is shown.

The inner peripheral surface (sidewall, inner circle wall) 212c (212-1c, 212-2c, 212-3c) of cycle room 212 be formed as and fuel orifice 220 inlet opens 220i center O between the swirl shape that reduces gradually towards downstream side from upstream side of interval.The swirl shape of this inner peripheral surface can have the part departed from from the curve of the helical curve defined by mathematical expression or involute curve etc.Adopt the fuel making in cycle room 212 cycle on one side flow on one side generally close to the inlet opens 220i of fuel orifice 220 or its center O ground shape of advancing.In this manual, such shape comprises helical curve or involute curve, is called swirl shape or swirl shape.

In cycle room 212, the downstream of cross walkway 211 is tangentially connected, and the inner peripheral surface 212c of cycle room 212 is formed with opening.Specifically, in 2 sidewalls (side) 211co, 211ci of cross walkway 211, sidewall 211co be positioned at outside in the radial direction of cycle room 212 is tangentially connected to the upstream-side-end 212cu of the sidewall 212c of cycle room 212.Another sidewall 211ci is connected to the end of downstream side 212cl of the sidewall 212c of cycle room 212.

Joint between sidewall 211ci and the end of downstream side 212cl of sidewall 212c is formed with the fillet part 212cc of the radius of curvature with regulation.By arranging fillet part 212cc, between sidewall 211ci and the end of downstream side 212cl of sidewall 212c, between cross walkway 211 and cycle room 212, be namely formed with the next door of predetermined thickness (diameter phi K).Thereby, it is possible to make the interflow of cycle fuel of the fuel and flowing cycle room 212 flowing into cycle room from cross walkway 211 become smooth and easy, the inflow of cycle fuel to fuel orifice 220 can be carried out efficiently.

Be formed in the upper-end surface 21nu of spray nozzle board 21n, the bottom surface 212b of cycle room 212 is made up of plane of inclination the bottom surface 211b parallel (i.e. level) of cross walkway 211.Thus, the position that also can be connected in the inclination of the bottom surface 212b of the bottom surface 211b of cross walkway 211 and cycle room 212, forms the curved part 213 of bottom surface.Curved part 213 also can by Surface forming.In addition, in the present embodiment, curved part 213 is arranged on the border of cross walkway 211 and cycle room 212, but also curved part 213 can be arranged on outside or the inner side of cross walkway 211, or stride across cross walkway 211 and the setting of ground, cycle room 212.

In addition, fuel orifice 220 is formed in the mode that its central axis 220a is vertical with the bottom surface 212b of cycle room 212, and in Figure 5, central axis 220a is overlapping with line segment A-A.

Here, with reference to Fig. 5 and Fig. 6, the change of short transverse of bottom surface 211b, 212b about the fuel passage being formed at cycle room 212 from cross walkway 211 is described.

In Figure 5, line segment B-B represents the line segment that the horizontal plane of the center O of the bottom surface 212b through cycle room 212 intersects with the bottom surface 212b relative to this horizontal plane.In addition, in the present embodiment, the center O of bottom surface 212b is consistent with the center of the inlet opens face 220i of fuel orifice.

Line segment A-A is the line segment be depicted in orthogonally with line segment B-B on the 212b of bottom surface.Point a in some a ~ e is positioned at the side, most upstream on the flow direction of fuel, and is positioned on curved part 213.Two dot dot dash of tie point a and some b are through in the radial direction (such as linking the direction of line segment of center O and some p) of center O, from track when making its change in angular position while the inner peripheral surface 212c of the cycle room 212 point p be positioned at separated by a distance inside cross walkway 211 maintains distance pd pd.Point a is positioned on line segment B-B, and some b is positioned on line segment A-A.Two dot dot dash of tie point b and some e are through in the radial direction of center O, and the line segment as the central authorities at interval formed by the peristome of inlet opens 220i of fuel orifice 220 and the inner peripheral surface 212c of cycle room 212 is described.Point c is positioned on line segment B-B, and some d is positioned on line segment A-A.In addition, about an e, the indoor side face 212c part of the cycle of correspondence is provided with fillet part 212cc.Thus, the central point at interval formed by the peristome of inlet opens 220i and the indoor side face 212c of cycle indoor for the cycle of upstream side side face 212c is assumed to the inner peripheral surface extended to fillet part 212cc and the some e determined.

Point c is positioned on line segment B-B, and some d is positioned on line segment A-A.

In cycle room 212, from an a towards an e, roughly constitute the stream of fuel along the direction of two dot dot dash.This stream defines from upstream extremity (some a side) towards downstream (some e side) and the stream of cycle around fuel orifice 220, and is called cycle stream (cycle path).In addition, the fuel flowed in this cycle stream is called cycle fuel.In addition, the fuel flowed down in fuel orifice 220 from cycle room 212 also maintains cycle in fuel orifice, and cycle in this fuel orifice 220 is while the fuel of flowing is also referred to as cycle fuel.

Fig. 6 is as the longitudinal axis using the position in the short transverse of the bottom surface 211b of the cross walkway 211 and bottom surface 212b of cycle room 212, in addition, using the position of each point a ~ e on two dot dot dash of Fig. 5 as the angular orientation centered by an O and as transverse axis, schematically describe the change of the short transverse position of bottom surface 211b, 212b.In addition, the change of the height of the fuel passage at each point a ~ e place when Ha ~ He in figure represents that the end face (upper surface) of cross walkway 211 and cycle room 212 is flatly formed by the front-end face 15t of valve base part 15.

Known an a to some b interval in, at the upstream side of an a, the short transverse position of cross walkway bottom surface 211b becomes steady state value (straight line shape), and cross walkway bottom surface 211b is level.Point a makes plane of inclination rises to the interval of some b, thus the short transverse position of cycle room bottom surface 212b uprises gradually.The short transverse position of the bottom surface 212b at some b place becomes the highest in a ~ e.At a b in the interval of putting d, from a b towards a d, plane of inclination is declined, thus the short transverse position step-down gradually of bottom surface 212b.Period, at a c place, the short transverse position of bottom surface 212b becomes identical with the short transverse position of the bottom surface 212b at an a place.In addition, the short transverse position of putting the bottom surface 212b at d place becomes minimum in a ~ e.In addition, the short transverse position of the bottom surface 212b at some a place is higher than the short transverse position of the bottom surface 212b at some d place, and lower than the short transverse position of the bottom surface 212b at some b place.At a d in the interval of putting e, from a d towards an e, plane of inclination is risen, thus the short transverse position of bottom surface 212b uprise gradually.

Point e is positioned on line segment B-B, and the short transverse position of bottom surface 212b becomes identical with the short transverse position of the bottom surface 212b at an a place.

From the upstream extremity of cross walkway 211 to an a, it is constant that the short transverse of fuel passage is of a size of Ha.At an a in the interval of putting b, along with the short transverse position of bottom surface 212b uprises, the short transverse size (size of space of bottom surface and end face) of fuel passage (cycle stream) reduces gradually from Ha to Hb.At a b place, the short transverse size of fuel passage becomes minimum in a ~ e.At a b in the interval of putting d, along with the short transverse position step-down of bottom surface 212b, the short transverse size of fuel passage increases gradually from Hb to Hd.At a d place, the short transverse size of fuel passage becomes maximum in a ~ e.At a d in the interval of putting e, along with the short transverse position of bottom surface 212b uprises, the short transverse size of fuel passage reduces gradually from Hd to He.Like this, in the present embodiment, cycle room bottom surface 212b is inclined relative to horizontal, with plane-parallel form cycle room end face, thus in the scope that angular orientation is 90 ° to 270 °, the short transverse size of fuel passage increases.In addition, 0 °, angular orientation is the situation of the upstream extremity being arranged in the transversal cycle stream that be formed in 2 angular orientations of the cycle stream of cycle room 212, that be formed in cycle room 212 of line segment B-B.

Fig. 7 represents when making the angle change of cycle room bottom surface 212b become 0 °, 10 °, 15 °, 20 °, angular orientation in cycle room 212 and the relation between the variance ratio of flow path cross sectional area.In addition, the flow path cross sectional area (that is, the flow path cross sectional area of cross walkway outlet) of the upstream-side-end that the longitudinal axis represents the angle of inclination of cycle room when being 0 ° as reference value, relative to the variance ratio of this reference value.The inner peripheral surface of the cycle room 212 in this situation is made up of the helical curve being formed as centrifugal shape.In centrifugal shape, along radial direction and the circumference preservation flow of cycle indoor.

The sectional area (sectional area in the cross section vertical with the flow direction of fuel) being formed in the fuel passage of cycle room 212 preferably reduces gradually towards fuel orifice 220.As shown in Figure 6 illustrates, the short transverse size of fuel passage is when increasing from upstream side towards the midway in downstream side, when the inner peripheral surface of cycle room 212 is made up of helical curve or involute curve simply, the sectional area of fuel passage can not reduce gradually, there is the situation that midway increases.

Reach in the scope of 15 ° at the angle of inclination of cycle room bottom surface 212b, along with angle of inclination increases, although the slip of flow path cross sectional area diminishes, sectional area reduces from upstream-side-end (0 °) gradually towards end of downstream side (360 °), can not increase in midway.Angle of inclination is more than 15 ° and when being configured to 20 °, flow path cross sectional area is increase (expansion) in the scope of 90 ° to 180 ° in the angular orientation of cycle indoor.The position of to be the position of 90 ° be the angular orientation of the cycle indoor point b of Fig. 6, the position of to be the position of 180 ° be the angular orientation of the cycle indoor point c of Fig. 6.

The inner peripheral surface of cycle room 212 is made up of above-mentioned helical curve, when being set to below 15 ° at the angle of inclination of cycle room bottom surface 212b, the flow path cross sectional area being formed in the cycle stream in cycle room 212 diminishingly can be formed from upstream-side-end towards end of downstream side.On the other hand, when making the angle of inclination of cycle room bottom surface 212b larger than 15 °, from the upstream-side-end of cycle stream towards the midway of end of downstream side, flow path cross sectional area increases.Thus, when making angle of inclination larger than 15 °, reduce the interval (flow path width) between the peristome of fuel orifice 220 and the indoor side face 212c of cycle, flow path cross sectional area is diminishingly formed from the upstream-side-end of cycle stream towards end of downstream side.In this situation, the indoor side face 212c of cycle is in the scope reducing flow path width, depicts the curve from helical curve or involute curve skew.Namely, in the present embodiment, the part that the path heights in cycle stream uprises towards downstream, makes the indoor side face 211c of cycle reduce the flow path width of cycle stream from helical curve or involute curve skew, thus, the flow path cross sectional area of cycle stream is diminishingly formed.

Here, the sectional area about cycle stream is described.Fig. 8 represents the VIII-VIII cross section of Fig. 5.

Line segment H-H shown in single dotted broken line is horizontal line, and the line segment V-V shown in single dotted broken line is the line segment with the horizontal plane comprising line segment H-H.Line segment A-A shown in line segment A-A and Fig. 5 is identical, and line segment P-P is the line segment vertical with line segment A-A and cycle room bottom surface 212b.Line segment H-H, line segment V-V, line segment A-A and line segment P-P pass the center O of fuel orifice 220 and cycle room 212.

In the present embodiment, fuel orifice 220 is formed in the mode that its central axis 220a is vertical with cycle room bottom surface 212b, thus central axis 220a is overlapping with line segment P-P.And central axis 220a is also overlapping with the central axis 212a of cycle room 212.

Indoor side face 212c is vertical with cycle room bottom surface 212b in cycle, and parallel relative to central axis 212a and 220a.In the cross section shown in Fig. 8, the cross section of cycle stream is the dash area shown in reference character 212p1,212p2.That is, the cross section 212p1 of cycle stream is the part surrounded by cycle room bottom surface 212b, the indoor side face 212c of cycle, cycle room end face 212ce (15t) and dotted line 800-1.In addition, the cross section 212p2 of cycle stream is the part surrounded by cycle room bottom surface 212b, the indoor side face 212c of cycle, cycle room end face 212ce (15t) and dotted line 800-2.Dotted line 800-1,800-2 are from the peristome of the inlet opens 220i of fuel orifice 220 to end face 212ce (15t), the imaginary line of drawing abreast with the central axis 212a of cycle room 212.

Below, the effect of the present embodiment is described with reference to Fig. 9 A to Figure 11.

Fig. 9 A represents the state of the cycle fuel when central axis 220a ' of fuel orifice 220 ' is tilted relative to cycle room bottom surface 212b '.As shown in Figure 9 A, when the injection direction of fuel is tilted relative to the central axis 1a of Fuelinjection nozzle, there is the situation that the central axis 220a ' of fuel orifice 220 ' is tilted relative to cycle room bottom surface 212b '.In this situation, when cycle room bottom surface 212b ' and fuel orifice central shaft 220a ' angulation significantly offset from 90 °, the cycle center being applied in the fuel of cycle power in cycle room 212 ' offsets from fuel orifice central shaft 220a '.Thus, cycle fuel along the all-round flowing of the inner peripheral surface of fuel orifice 220 (internal face), at a part of SE of circumference, can not be peeled off from the inner peripheral surface of fuel orifice 220 '.Specifically, when observing fuel orifice 220 ' from its inlet side (upstream side), in the scope can observed from the inlet opens face in the inner peripheral surface of fuel orifice 220 ', cycle fuel is applied in and flows in tension, in the scope that can not observe (becoming shade and the scope that can not see), cycle fuel is peeled off from inner peripheral surface.Thus, perfect liquid film can not be formed in fuel orifice 220 ', be hindered from the pelletizing of the fuel of fuel orifice 220 injection.

Fig. 9 B represents the state of the cycle fuel when central axis 220a of fuel orifice 220 is vertically formed relative to cycle room bottom surface 212b.In the present embodiment, as shown in Figure 9, fuel orifice 220 and cycle room bottom surface 212b are vertically formed, and thus, cycle fuel does not flow from inner peripheral surface isolator along the inner peripheral surface of fuel orifice 220, form homogeneous on the whole and thin liquid film in circumference.Thus, divide from the liquid film of fuel orifice 220 injection and become by micronized drop, around central axis 220a, forming the spraying of the hollow cone shape of homogeneous.

But, when making the bottom surface 212b of cycle room 212 be inclined relative to horizontal, as illustrated in use Fig. 5 and Fig. 6, the problem that the flow path cross sectional area producing the cycle stream be formed in cycle room 212 increases in midway.

Figure 10 represent using the variance ratio of the particle diameter of the fuel sprayed from fuel orifice and be formed at the liquid film in fuel orifice the variance ratio of thickness as the longitudinal axis, and the variance ratio of particle diameter and thickness is the variation characteristic at the angle of inclination of cycle room relative to transverse axis.In addition, the particle diameter that the longitudinal axis represents the angle of inclination of cycle room when being 0 ° and thickness as reference value, relative to the variance ratio of this reference value.In addition, fuel orifice and cycle room plane perpendicular ground are formed, and tilt integratedly with cycle room.

When the angle of inclination of cycle room is more than 15 °, the increment rate of particle diameter and thickness sharply becomes large, and particle diameter and thickness become large.This as described in Figure 7, the flow path cross sectional area that can produce cycle stream becomes large interval between upstream-side-end and end of downstream side, and energy efficiency does not generate cycle fuel well.

Figure 11 represents the variation characteristic of the variance ratio of cycle flow velocity relative to the angle of inclination of cycle room.In addition, in fig. 11, show the cycle flow velocity in the export department of fuel orifice, cycle flow velocity when being 0 ° using the angle of inclination of cycle room as reference value, relative to the variance ratio of this reference value.In addition, fuel orifice and cycle room plane perpendicular ground are formed, and tilt integratedly with cycle room.

When the angle of inclination of cycle room is more than 15 °, the slip of the cycle flow velocity in the export department of fuel orifice sharply becomes large and reduces.This as described in Figure 7, the flow path cross sectional area that can produce cycle stream becomes large interval between upstream-side-end and end of downstream side, and energy efficiency does not generate cycle fuel well.

In the present embodiment, the flow path cross sectional area of cycle stream is diminishingly formed, thereby, it is possible to prevent the reduction of cycle flow velocity, and efficiency generates cycle fuel well.Thereby, it is possible to make the thickness of the liquid film be formed in fuel orifice 220 thinning, and improve the pelletizing of spray droplet.

Return Fig. 4, the angle of inclination about cross walkway 211 and cycle room 212 is described.

Fuel orifice 220 needs correspondingly to set with the injection direction of fuel relative to the angle of inclination of the central axis 1a of Fuelinjection nozzle.Cycle room bottom surface 212b is preferably vertical with the central axis 220a of fuel orifice 220.On the other hand, cross walkway 211 is improve the rectification effect of fuel flowing, needs the path-length of certain degree.In addition, in the present embodiment, cross walkway 211 and cycle room 212 are completely segregated, and cycle room 212 is connected to the front end (downstream) of cross walkway 211.The length dimension that the structure of connection cross walkway 211 and cycle room 212 is required diametrically like this becomes large.Thus, cycle room bottom surface 212b is inclined relative to horizontal, when the cross walkway bottom surface 211b with the angle of inclination identical with this cycle room bottom surface 212b is connected to cycle room 212, needs to make the thickness of spray nozzle board 21n thickening.In addition, angle of inclination is larger, more needs to make the thickness of spray nozzle board 21n thickening.

In the present embodiment, as mentioned above, cross walkway bottom surface 211b is level, and cycle room bottom surface 212b is inclined relative to horizontal.That is, 211b angle of inclination with respect to the horizontal plane in cross walkway bottom surface is different with bottom surface 212b angle of inclination with respect to the horizontal plane, cycle room.In this situation, cross walkway bottom surface 211b needs not be level, also can be inclined relative to horizontal.But 211b angle of inclination with respect to the horizontal plane, cross walkway bottom surface (comprising angle of inclination=0 °) is less than bottom surface 212b angle of inclination with respect to the horizontal plane, cycle room.By forming like this, thickness size landform transversely path 211, cycle room 212 and the fuel orifice 220 of spray nozzle board 21n can not be increased.That is, cross walkway 211, cycle room 212 and fuel orifice 220 can be formed compactly along the thickness direction of spray nozzle board 21n.

The direction that the direction that cross walkway bottom surface 211b is inclined relative to horizontal also can be inclined relative to horizontal with cycle room bottom surface 212b is contrary.Because cross walkway 211 ensure that its path-length, so when making cross walkway bottom surface 211b tilt to the direction contrary with cycle room bottom surface 212b, also the preferred absolute value than bottom surface 212b angle of inclination with respect to the horizontal plane, cycle room is little for the absolute value at 211b angle of inclination with respect to the horizontal plane, cross walkway bottom surface.

The structure making 211b angle of inclination with respect to the horizontal plane in cross walkway bottom surface different with bottom surface 212b angle of inclination with respect to the horizontal plane, cycle room, relative to the structure making cycle room bottom surface 212b be inclined relative to horizontal, also has above-mentioned effect.

In addition; preferably vertically form cycle room bottom surface 212b relative to the central axis 220a of fuel orifice 220; but when fuel orifice central axis 220a is tilted relative to the central axis 1a of Fuelinjection nozzle 1; fuel orifice central axis 220a and cycle room bottom surface 212b is not configured to quadrature completely; cycle room bottom surface 212b is tilted to the direction identical with the true dip direction of central axis 220a; thereby, it is possible to improve homogenizing and the micronized effect of drop of liquid film in certain degree.

In this situation, by adopting the structure making 211b angle of inclination with respect to the horizontal plane in cross walkway bottom surface different with bottom surface 212b angle of inclination with respect to the horizontal plane, cycle room, above-mentioned effect can be obtained.

[embodiment 2]

Below, with reference to Figure 12, the 2nd embodiment of the present invention is described.Figure 12 represents and the sectional view from the same cross section of the III-III direction of arrow inspecting valve base member of Fig. 2 and the cross section of spray nozzle board.In the present embodiment, the sectional view observed from the II-II direction of arrow of Figure 12 is identical with Fig. 2.In this situation, the spray nozzle board 21n in Fig. 2 is made up of the composite part of valve base part 15 and spray nozzle board 21n.

In the 2nd embodiment, inner peripheral surface (side wall surface) 212c of side (side wall surface) 200c of the longitudinal passage 200 in the 1st embodiment, side (side wall surface) 211c of cross walkway 211 and cycle room 212 is formed at the front-end face 15t of valve base part 15 with channel-shaped.The cycle room bottom surface 212b be inclined relative to horizontal and the cross walkway bottom surface 211b flatly formed is formed at this side of spray nozzle board 21n.Cycle room bottom surface 212b and cross walkway bottom surface 211b is formed at the upper-end surface 21nu of spray nozzle board 21n with convex.

Other structure is identical with the 1st embodiment, and can obtain the effect same with the 1st embodiment.

[embodiment 3]

Below, with reference to Figure 13, the 3rd embodiment of the present invention is described.Figure 13 represents and the sectional view from the III-III direction of arrow inspecting valve base member of Fig. 3 and the same cross section of the sectional view of spray nozzle board.The plan view of this side of 21nu, upper-end surface of the spray nozzle board 21n of the present embodiment is identical with the plan view shown in Fig. 2.

In the 3rd embodiment, relative to the 1st embodiment, change the structure of the end face of cycle room 212 and the end face of cross walkway 211.That is, valve base part front-end face 15t forms the end face 212ce of cycle the room 211 and end face 211ce of cross walkway 211 with convex.Cycle room end face 212ce tilts in the same manner as the bottom surface 212b of cycle room.That is, the true dip direction of the true dip direction of cycle room end face 212ce and angle of inclination and cycle room bottom surface 212b and angle of inclination identical.Tilt in the same manner as the bottom surface 212b of cycle room by making cycle room end face 212ce, the indoor side face 212c of cycle is made up of helical curve or involute curve simply, even if increase the angle of inclination of cycle room bottom surface 212b, the structure that the flow path cross sectional area that also can realize cycle stream reduces gradually.

Other structure is identical with the 1st embodiment, and can obtain the effect same with the 1st embodiment.In addition, can also with the textural association of the 2nd embodiment form.That is, also inner peripheral surface (side wall surface) 212c of side (side wall surface) 211c of the side of longitudinal passage 200 (side wall surface) 200c, cross walkway 211 (with reference to Fig. 2) and cycle room 212 can be formed at the front-end face 15t of valve base part 15 with channel-shaped.The spray nozzle board 21n of the present embodiment is the identical structure of spray nozzle board 21n with the 1st embodiment.

[embodiment 4]

Below, with reference to Figure 14, the 4th embodiment of the present invention is described.Figure 14 represents and the sectional view from the III-III direction of arrow inspecting valve base member of Fig. 2 and the same cross section of the sectional view of spray nozzle board.In the present embodiment, the spray nozzle board 21n of Fig. 2 is considered as the plate-shaped member of stacked spray nozzle board 21n and intermediate plate 400, the plan view of the side, upper-end surface of the plate-shaped member in the present embodiment becomes the plan view same with Fig. 2.

In the present embodiment, intermediate plate 400 is inserted between valve base part 15 and spray nozzle board 21n.Side (side wall surface) 211c (with reference to Fig. 2) of side (side wall surface) 200c in the 1st embodiment, longitudinal passage 200, cross walkway 211 and inner peripheral surface (side wall surface) 212c of cycle room 212 is formed at intermediate plate 400.The indoor side face 212c of longitudinal passage side 200c, cross walkway side 211c and cycle is penetratingly formed along the thickness of slab direction of intermediate plate 400.The cycle room bottom surface 212b be inclined relative to horizontal and the cross walkway bottom surface 211b flatly formed is formed at this side of spray nozzle board 21n.Cycle room bottom surface 212b and cross walkway bottom surface 211b is formed at the upper-end surface 21nu of spray nozzle board 21n with convex.

Namely, in the present embodiment, have the valve base part 15 being formed with valve seat 15b in this side of spray nozzle part main body, plate-shaped member is made up of intermediate plate 400 and spray nozzle board 21n, and on intermediate plate 400, be formed with the inner peripheral surface 212c of cycle the room 212 and side 211c of cross walkway 211.And, between valve base part front-end face 15t and spray nozzle board 21n, clip intermediate plate 400, intermediate plate 300 and spray nozzle board 21n are cascading on valve base part front-end face 15t.Thus, form the end face of cycle room 212 and the end face 211ce of cross walkway 211 by valve base part front-end face 15t and form cycle room 212 and cross walkway 211.

Pass through said structure, an end face (end face) of intermediate plate 400 is arranged with valve base part front-end face 15t with abutting, and spray nozzle board 21n is arranged with the other end (with the end face of the opposition side of the bearing surface between valve base part 15) of intermediate plate 400 with abutting.

Other structure is identical with the 1st embodiment, and can obtain the effect identical with the 1st embodiment.In addition, in the present embodiment, the cycle room end face 212ce of the 3rd embodiment and the structure of cross walkway end face 211ce can also be adopted.That is, as the 3rd embodiment, also on valve base part front-end face 15t, cycle room end face 212ce and cross walkway end face 211ce can be formed with convex.

With reference to Figure 15, the internal-combustion engine having carried Fuelinjection nozzle of the present invention is described.Figure 15 is the sectional view of the internal-combustion engine having carried Fuelinjection nozzle 1.In the present embodiment, multiple fuel orifice 220 is divided into 2 groups, the Fuelinjection nozzle 1 of the fuel orifice 220 of each group to two different direction burner oils is described as object.In addition, Fuelinjection nozzle 1 also can adopt above-mentioned 1st embodiment to any one party in the 4th embodiment.

In the engine cylinder-body 101 of internal-combustion engine 100, be formed with cylinder 102, be provided with suction port 103 and relief opening 104 at the top of cylinder 102.Suction port 103 is provided with the suction valve 105 of opening and closing suction port 103, in addition, relief opening 104 is provided with the outlet valve 106 of opening and closing relief opening 104.Be formed at engine cylinder-body 101 and the inlet-side end portions 107a of the charge air flow path 107 be communicated with suction port 103 is connected with suction tude 108.

Fuel distribution tube 110 is connected with at the fuel supplying mouth 2 (with reference to Fig. 1) of Fuelinjection nozzle 1.

Suction tude 108 is formed the assembly department 109 of Fuelinjection nozzle 1, assembly department 109 is formed the insert port 109a inserting Fuelinjection nozzle 1.Insert port 109a extends through the internal face (charge air flow path) of suction tude 108, and the fuel sprayed from the Fuelinjection nozzle 1 being inserted into insert port 109a is injected in charge air flow path.When two directions sprayings, will arrange the internal-combustion engine of the mode of two suction ports 103 as object in engine cylinder-body 101, each suction port 103 (suction valve 105) and injected is pointed in respective injected fuel spray.

In addition, about injection direction and the number of the configuration of fuel orifice 220, number and angle and injected fuel spray, suitably can change matchingly with the mode of internal-combustion engine.

In the various embodiments described above, a kind of Fuelinjection nozzle 1, the downstream side of the valve seat 15b abutting/leave at valve body 17 has: fuel orifice 220; Cycle room 212, offers the entrance 220i of fuel orifice 220 and around entrance 220i, has the cycle stream of fuel; Cross walkway 211, supplies fuel to cycle room 212.Plate-shaped member (spray nozzle board) 21n being at least formed with fuel orifice 220, the bottom surface 212b of cycle room 212 and the bottom surface 211b of cross walkway 211 is joined to the front-end face 15e of the spray nozzle part main body side with valve seat 15b, wherein, abutting part between the front-end face 15e of plate-shaped member 21n and spray nozzle part main body side is made up of plane, cycle room bottom surface 212b relative to abutting part planar tilt formed, and the central axis 220a of fuel orifice 220 and cycle room bottom surface 212b is vertically formed.

Cycle room bottom surface 212b is formed relative to the planar tilt with the abutting part abutted between spray nozzle part main body side front-end face 15e; and the central axis 220a of fuel orifice 220 and cycle room bottom surface 212b is vertically formed; thereby, it is possible to provide the direction that can tilt towards the central axis 220a relative to Fuelinjection nozzle 220 to spray cycle fuel and the Fuelinjection nozzle that the pelletizing of fuel is excellent, productivity is high.

In addition, the invention is not restricted to the various embodiments described above, the deletion that can a part of structure be carried out, do not record other structures add etc.In addition, between the embodiments, the replacement of the structure of each embodiment's record can also be carried out or add.

Claims (10)

1. a Fuelinjection nozzle, the downstream side of the valve seat abutting/leave at valve body has: fuel orifice; Cycle room, offers the entrance of described fuel orifice and around described entrance, has the cycle stream of fuel; Cross walkway, to described cycle room supply fuel,

To the front-end face that major general is formed with described fuel orifice, the plate-shaped member of the bottom surface of described cycle room and the bottom surface of described cross walkway is engaged in the spray nozzle part main body side with described valve seat,

The feature of described Fuelinjection nozzle is,

The abutting part of described plate-shaped member and described spray nozzle part main body side front-end face is made up of plane,

Bottom surface, described cycle room relative to described abutting part planar tilt formed, and described fuel orifice and described cycle room plane perpendicular ground formed.

2. Fuelinjection nozzle as claimed in claim 1, it is characterized in that, the flow path cross sectional area of described cycle stream reduces gradually towards downstream side.

3. Fuelinjection nozzle as claimed in claim 2, it is characterized in that, the bottom surface of described cross walkway is extended along the direction along described plane of described plate-shaped member, and described cross walkway bottom surface is different relative to the angle of inclination of described plane with bottom surface, described cycle room relative to the angle of inclination of described plane.

4. Fuelinjection nozzle as claimed in claim 3, it is characterized in that, described cross walkway bottom surface is less relative to the angle of inclination of described plane than bottom surface, described cycle room relative to the angle of inclination of described plane.

5. Fuelinjection nozzle as claimed in claim 4, is characterized in that, described cross walkway bottom surface and described plane parallel ground are formed.

6. Fuelinjection nozzle as claimed in claim 5, is characterized in that,

The front-end face of described spray nozzle part main body side is made up of plane, and constitutes the end face of described cycle room and described cross walkway by the plane of described spray nozzle part main body side front-end face,

The inner peripheral surface of described cycle room is formed with depicting helical curve or involute curve, and the part that the path heights in described cycle stream uprises towards downstream, the indoor side face of described cycle is formed from described helical curve with offseting.

7. Fuelinjection nozzle as claimed in claim 5, it is characterized in that, the side of described cross walkway and the inner peripheral surface of described cycle room are formed at described plate-shaped member, and are formed with the longitudinal passage fuel that have passed described valve seat being supplied to described cross walkway at described plate-shaped member.

8. Fuelinjection nozzle as claimed in claim 5, is characterized in that,

Described plate-shaped member is on the end face of the opposition side being engaged with described this side of spray nozzle part main body side front-end face, is formed with the recess with the bottom surface parallel with bottom surface, described cycle room,

The outlet of described fuel orifice is opened in the bottom surface of described recess.

9. Fuelinjection nozzle as claimed in claim 5, is characterized in that,

At described spray nozzle part main body side front-end face, be formed with the protrusion with the face parallel with the bottom surface of described cycle room,

The end face of described cycle room is constituted by the described face of described protrusion.

10. Fuelinjection nozzle as claimed in claim 5, is characterized in that,

At described spray nozzle part main body side, there is the valve base part being formed with described valve seat,

Described plate-shaped member is made up of intermediate plate and described spray nozzle board, and is formed with the inner peripheral surface of described cycle room and the side of described cross walkway at described intermediate plate,

Described intermediate plate is clipped between described valve base part front-end face and described spray nozzle board, described intermediate plate and described spray nozzle board are cascading at described valve base part front-end face, thus, form the end face of described cycle room and the end face of described cross walkway by described valve base part front-end face and define described cycle room and described cross walkway.