CN1077955C

CN1077955C - Fuel injector

Info

Publication number: CN1077955C
Application number: CN94191662A
Authority: CN
Inventors: M·W·查邦; B·J·哈维; T·A·拉纳拉; H·J·塞拉; B·塔; C·J·特洛什
Original assignee: Ford Motor Co; Siemens Automotive LP
Current assignee: Ford Motor Co; Siemens Automotive LP
Priority date: 1993-02-16
Filing date: 1994-02-14
Publication date: 2002-01-16
Anticipated expiration: 2014-02-14
Also published as: DE69402964D1; WO1994019601A1; CN1120364A; DE69402964T2; EP0685035B1; EP0685035A1

Abstract

Fuel injector (50) has combination valve-armature (70) that opens by tilting about a consistent circumferential location of its perimeter. Initial opening tilting motion is stopped by corrugated stop surface of annular stop member (66; 66'; 66'') with final tilting motion occuring about the corrugated stop surface until the full perimeter of the valve element part abuts the full perimeter of the corrugated stop surface. Corrugations are created by acid etching process. Object of invention is lower fabricating cost for specified performance of injector.

Description

Oil sprayer

The present invention is that the sequence number submitted on February 16th, 1993 is a part continuation application of 08/017719 not authorization application.

The field of the invention

The present invention relates to the oil sprayer of internal-combustion engine.

Background of the present invention

In the past few decades, the application of oil sprayer in the spark-ignition type Vehicular internal combustion engine constantly increases, and replaced the Carburetor as the metered fuel charge device of motor to a large extent.At a typical multi-point fuel injection system that is used for multi-cylinder engine, each cylinder is provided with an oil sprayer, oil sprayer is prepared fuel oil is sprayed in the inlet stream at any time, so that be involved in the combustion air that enters cylinder, therefore, current typical four cylinders, six cylinders or eight cylinder engine will dispose four, six or eight oil sprayers.

With regard to its characteristic, oil sprayer is a kind of high-accuracy parts, design a kind of can under more cost-effective condition, the manufacturing, the possibility of not sacrificing the oil sprayer of its quality and performance simultaneously again is to be worth Investigational, because will continue the prospect that increases with regard to the application of the scale of global automobile market and oil sprayer, it is reasonable that expectation market will be repaid the people that can implement this design.

Summary of the present invention

According to a kind of oil sprayer provided by the invention, it has one with the filler opening of a pressured fluid fuel source fluid ground UNICOM and one fuel oil to be sprayed the oil outlet of oil sprayer, and comprises:

Have an electromagnetic actuators part of a longitudinal axis or knock power assembly and a valve portion, this electromagnetic actuators partly comprises a coil and coil carrier assembly, this valve portion comprises a valve body, contain a valve-iron core group component in this valve body, it can move unlatching and operating position selectively and make oil sprayer opening and closing fuel oil flowing between filler opening and oil outlet, when being energized, electromagnetic actuators electromagnetic force is acted on valve-iron core group component by oil inlet pipe, a valve base piece in the valve body, this valve base piece has a valve seat surface towards valve-iron core group component, this valve base piece has central, circular through hole parts, these parts have an inlet and the outlet of leading to oil outlet at the valve seat surface place, pass the manhole of valve-iron core group component, be used for to have entered at the filler opening place surface of the fuel delivery of oil sprayer to described valve-iron core group component, in valve-iron core group component one the valve seat surface facing surfaces with valve base piece, spring members, these parts are elastically biased toward valve-iron core group component so that described surface is landed on the valve seat surface of valve base piece along described axis substantially, and when electromagnetic actuators starter gate valve-iron core group component makes oil sprayer be closed in fuel flow between filler opening and the oil outlet, from central, circular through hole parts place sealing manhole, valve-iron core group component relative stator parts, make when electromagnetic actuators moves and is failure to actuate, valve-iron core group component is subjected to the effect of power, make it towards the valve base piece part that moves and lift off a seat, be in the retainer that is provided with under the interference relationships with the lift off a seat motion of part of valve-iron core group component, it is by docking and this motion of limiting valve-iron core group component with valve-iron core group component, this stop component comprises a retainer, it is characterized in that:

This retainer has a waveform stop surface part, this stop surface is relative with the interface part of valve-iron core group component, the waveform stop surface of this retainer partly comprises some waveform patterns such as groove, round button, ridge, they are relative with the interface part of valve-iron core group component, and the ridge by a series of extending circumferentiallies limits, the week that these ridges are arranged on a groove in the radial edges of retainer upwards and by some space portions upwards separates in week, the ridge of this extending circumferentially vertically from retainer towards valve-interface of iron core group component part projection, described groove is limited by an axial walls and a radial wall, wherein axial walls is faced the interface part of valve-iron core group component and an axial end of sealing this groove, and radial wall seals a radial extremity of this groove.

According to a kind of method of making oil sprayer provided by the invention, may further comprise the steps:

In an edge of a uniform punching press diskware of thickness, process a waveform patterns such as groove, space portion, ridge by acid etching, form a waveform stop surface in the retainer thus, this retainer is arranged in the oil sprayer, make when oil sprayer is operated and opens, this valve member is with this waveform stop surface of apical grafting, and when oil sprayer was operated and cuts out, the influence that this waveform stop surface is bonded on the retainer valve member reduced to minimum degree.

The present invention relates to a kind of novel unique oil sprayer, it is intended to mainly improve its cost benefit from the consideration of making, and the attention of the consideration aspect on making is caused producing a kind of oil sprayer.In this oil sprayer, the shape of some high-accuracy parts is quite simple, has only several parts complicated, these quite simple parts, although they are high-accuracy parts on characteristic, also can produce by batch by the cost-effective manufacturing process of setting up.Than the obvious fairly simple parts costliness of the manufacturing of complex component, but in general, then produce the higher oil sprayer of a kind of cost benefit, these parts also require to adopt the higher method of cost benefit to assemble and regulate oil sprayer.The improvement aspect that oil sprayer of the present invention provided had both related to some independent parts, also related to the matching relationship between the various parts.

In order to make us acceptance commercial, any oil sprayer must satisfy some specification that can not take into account and requirement.Oil sprayer must the moment that requires accurately with opening and closing repeatedly, oil sprayer can not have leakage when closing, oil sprayer also must have reliably permanent performance and keep the height conformity of performance in its effective life-span.

The example of oil sprayer has many, for example referring to JP-A-63109277, wherein disclose a kind of movably oil sprayer of valve member that has, valve member is subjected to the attraction of the magnetic force of an electromagnetic coil generation, when valve member was activated, its motion was limited by a retainer.When valve member is docked on the retainer, can produce very big sound, make the passenger on the automobile or the manipulator of motor of this oil sprayer be housed fidgety.JP-A-63109277 proposes to adopt at the groove that is disposed radially towards the valve member center direction, and its effect is the propagation that weakens impact noise.EP-A-0314337 proposes a kind of non-magnetic spacer part of circle.Adhere to possibility on the retainer in order to reduce valve member, its inner circumferential surface is processed with some tongues that extend internally, to reduce area of contact.

Some features that utilization of the present invention had can satisfy these requirements in a kind of cost-effective mode, these features relate to a valve-iron core group component, this valve-iron core group component comprises an iron-core element and the valve element that harder magnetic conductivity is less that magnetic conductivity is bigger, and they are linked together by laser bonding; Relate to seal ring and adapter ring on the planar surface of valve element, the valve element is towards a planar surface of a circular valve seat part, and valve base piece has a center through hole by the opening and closing of valve element; Relate to the mode that fuel gallery and these seal rings and adapter ring is interrelated by the valve element; Relate to an annular stop part, it has the waveform inward flange that docks with the valve element, when oil sprayer is in the work opening state, and the displacement of limiting valve-iron core group component from the valve seat; Relate to this wave edges of acid etching processes and relate to the little porose disc in a band skirt section and the mode that other inner member of itself and oil sprayer is interrelated; Relate to contact method with driver and oil sprayer; Relate to various inner seal member; And the method that relates to the various parts that assemble oil sprayer.

Valve base piece is that one of them can be mass-producted than simple components with highi degree of accuracy economically, it comprises a flat disk that a center through hole is arranged, its two relative surfaces are high-precision working surfaces, one of them surface is in the face of valve-iron core group component, and the valve element is landed in exactly on this surface and from valve base piece and disseats, to close and to open the through hole in the valve base piece, because its geometrical shape is simple, desired precision can be produced very economically and reach to valve base piece.

Be provided with seal arrangement between valve element and the valve base piece, thereby fuel oil can not leak from oil outlet when oil sprayer cuts out, seal arrangement is taked a circular seal ring of projection from the planar surface of valve element, it is in the face of the flat seat surface of valve base piece, because the sealing ring must accurately be sealed on the flat seat surface of valve base piece when oil sprayer cuts out, the valve element also must be a precise part, in order in the actual life of oil sprayer, to keep sealed precision, except seal ring, on the similar face of valve element, be provided with the adapter ring of a precision, it engages with valve base piece when oil sprayer cuts out, keep out the closing impact of a considerable part thus, rather than only keep out this power by seal ring.In addition, oil sprayer must be so that the as far as possible little mode of liquid capsule volume be fed to the valve seat district with fuel oil, and it must not can make valve-iron core group component be subjected to unbalanced fluid power effect.(the liquid capsule volume refers to be positioned at the inside fuel path part in downstream in the place of seal ring effect).In order to make liquid capsule volume minimum, seal ring keeps little diameter and axial dimension.In order on valve-iron core group component, to keep satisfied hydraulic resistance balance, wherein be provided with the fuel gallery and make when the valve element is closed on valve base piece, the highly pressurised liquid fuel oil occupies the annular region of adapter ring and seal ring centre and another is positioned at the annular region of adapter ring radial outside.These fuel galleries are relative mutually along diametric(al), and they and adapter ring intersect makes adapter ring circumferentially discontinuous but keep seal ring circumferentially continuous thus.Although some manufacturing expenses concentrate on this valve-iron core group component, make the overall cost benefit natural increase of oil sprayer owing to the benefit that in making other parts, is realized.

The peripheral boundaries of valve element is limited by a rounded washers ring, and this gasket rings remains in the valve body of oil sprayer regularly, and this gasket rings also can be made on the cost benefit highland.The outer circumferential edge that faces toward the valve base piece surface of valve element is used for gasket rings is remained on a shoulder of valve body, and make retainer between gasket rings and valve body shoulder, the radially inward edge of retainer radially is bonded on the radially outward edge on surface of valve element, and this surface is on that surperficial opposite of containing adapter ring and seal ring.This radially inward edge of retainer comprises a waveform stop surface in the face of the valve element, waveform is limited by a series of rectangle groove, these grooves respectively are arranged on the retainer side by side, they towards the valve element axially on and open wide on the radially inner direction, on other direction, seal by the wall that limits trough rim circle.The waveform portion of retainer helps to reduce the influence of stiction, and this stiction is may produce when not having the plane of waveform at stop surface.The waveform of retainer is processed easily by a kind of acid etching technology, in the embodiment of a remodeling, acid etching technology is used to process a waveform stop surface, and this waveform stop surface comprises the groove of a ring, and this groove has some around the little round button between the groove homogeneous phase.

The valve element is symmetrical around the longitudinal axis of oil sprayer basically, and the intentional asymmetric setting of iron-core element, so that a nonequilibrium working clearance is provided between iron-core element and stator.As a result, when oil sprayer is operated and opens, valve-iron core group component will be implemented the oscillating motion left from valve base piece.And, this oscillating motion will occur in the identical circumferential position place around valve-iron core group component, improved the repeatability of performance thus, this is to obtain when iron core is symmetrical arranged basically, because this random banking motion of circumferential generation that causes easily around valve-iron core group component that is symmetrical arranged.

Retainer can be made economically, because it is a flat thin ring, the groove that constitutes waved surface can be made by known acid etch technique, can make with common Technological Economy ground with the little porose disc of valve base piece adjacency below valve base piece.Valve body and be essentially tubular parts and can make economically with common machining technique because valve-iron core group component comprises not really simple elements of two geometrical shapies, therefore under any circumstance all must adopt exquisiter technology to process them.Therefore, some structure characteristics are covered above them, as the adapter ring and the seal ring of valve element, the fuel gallery of valve-iron core group component, connection of the shape of iron-core element and it and valve element or the like all is attached on these parts that need some machining operations anyway; But have total economic benefit, will on other parts that geometrical shape can be simplified, produce very big saving because these features are added on the parts that have remarkable geometrical shape.

Other novel characteristics of the present invention comprises: adopt an independent O shape to encircle to provide the bikini inner sealing contact between three different parts with oil sprayer; The frustoconical skirt section that in the outward edge of little porose disc, forms; A conical spring pad, it flexibly acts on the body of electric actuator (being the electromagnetic coil frame) and passes between the shoulder of oil inlet pipe of coil carrier, make the lower flange of coil carrier be supported on the valve body securely, simultaneously on the assembling part that moulding material is injected into oil sprayer so that these parts are encapsulated in when finishing it in the moulded plastic material and making, prevent that moulding material is squeezed between the inside of oil inlet pipe and coil carrier; With the frame of a lateral opening, coil block inserts in this framework, and this frame cooperates the part of formation to the magnetic loop of the iron-core element magnetic flux of valve-iron core group component with oil inlet pipe.

Can be adapted to the process of producing by batch of metal processing and assembling well according to the oil sprayer of principle manufacturing of the present invention, oil sprayer also can satisfy the desired performance technologies requirement of the motor operation conditions that reaches hope, do not forget simultaneously fuel economy, toxic emission and engine performance.

Become reconciled place and additional characteristic of above-mentioned advantage of the present invention can see from the following description book and claims in conjunction with the accompanying drawings that these accompanying drawings disclose according to a preferred embodiment implementing the best mode that the present invention considered at present.

Brief description of drawings

Fig. 1 is the vertical view that embodies an oil sprayer of the principle of the invention;

Fig. 2 is the longitdinal cross-section diagram that arrow 2-2 direction is got in Fig. 1;

Fig. 3 is by the oil sprayer of Fig. 1 but a longitdinal cross-section diagram vertical with the sectional view of Fig. 2;

Fig. 4 is the enlarged view than the bottom of the oil sprayer seen along the direction identical with Fig. 2;

Fig. 5 is a full view of arrow 5-5 direction in Fig. 4;

Fig. 6 is the plan view of one of them parts in the Figure 4 and 5;

Fig. 7 is a sectional view of the parts that pass through Fig. 6 that arrow 7-7 direction is got in Fig. 6;

Fig. 8 is that of parts looks up full figure among Fig. 6;

Fig. 9 is the partial enlarged view got of the circle 9 in Fig. 7 roughly;

Figure 10 is an elevation view of parts among Fig. 6;

Figure 11 is the plan view of another parts in the oil sprayer shown in the Figure 4 and 5 that part of;

Figure 12 is the sectional view that arrow 12-12 direction is got in Figure 11;

Figure 13 is the plan view of another parts in the oil sprayer shown in the Figure 4 and 5 that part of;

Figure 14 is the sectional view that arrow 14-14 direction is got in Figure 13;

Figure 15 is the worm's eye view of another parts in the oil sprayer shown in the Figure 4 and 5 that part of;

Figure 16 is the amplification sectional view that arrow 16-16 direction is got in Figure 15;

Figure 17 is the elevation view of an amplification of parts among Figure 15;

Figure 18 is a partial enlarged view of the part of Figure 17;

Figure 19 is the plan view that is used in parts in another part of oil sprayer;

Figure 20 is a view of arrow 20-20 direction in Figure 19;

Figure 21 is the worm's eye view of Figure 20;

Figure 22 is the view in transverse section that arrow 22-22 direction is got in Figure 20;

Figure 23 is an elevation view of the parts among Figure 19-21;

Figure 24 is the plan view that is used in an amplification of the another parts in the oil sprayer;

Figure 25 is the sectional view that arrow 25-25 direction is got in Figure 24;

Figure 26 is a view that is similar to Figure 17, but represents the embodiment of a remodeling;

Figure 27 is the partial enlarged view of Figure 26;

Figure 28 is the embodiment's of another remodeling a view that is similar to Fig. 15;

Figure 29 is the sectional view of the amplification that arrow 29-29 direction is got in Figure 28.

Preferential embodiment's description

Fig. 1-3 shows the general structure and the deployment scenarios of an exemplary oil sprayer 50 that embodies the principle of the invention.Usually, it comprises several separate parts of forming a valve portion or valve assembly 52 together, forms several separate parts and molding part 56 of an electromagnetic actuators part or Power Component 54 together, this molding part 56 is embossed on two

assemblies

52 and 54, constitutes injector body.Two

assemblies

52,54 have a common longitudinal axis 57.

Several separate parts of forming valve assembly 52 comprise: 66, one valve body spares 68 of 64, one retainers of 62, one washer parts of 60, one valve base pieces of 58, one aperture spares of a valve seat supporting element and a valve-iron core group component 70.Several separate parts of forming Power Component 54 comprise: 72, one coils of a frame and 78, one conical spring packing rings 80 of 76, one adjutages of 74, one oil inlet pipes of coil carrier assembly and a filter 82.

At place, bottom near oil sprayer, comprise a groove 86 on the external diameter of valve seat supporting element 58, an O V-shaped ring 88 is housed in this groove 86, when oil sprayer is installed on the motor, this O V-shaped ring 88 makes the external diameter of lower axial end of oil sprayer with respect to the sealing of the internal diameter in the hole in the air intake branch (not shown), similarly, at upper end near oil sprayer, on the external diameter of oil inlet pipe 76, another O V-shaped ring 90 is installed, it is contained on the oil inlet pipe vertically, and remain between the terminal 92 and back-up rings 94 that are fixed on the oil inlet pipe external diameter of going up of molding part 56, O V-shaped ring 90 makes the external diameter of upper axial end of oil sprayer with respect to the sealing of the internal diameter in the hole in the fuel pipe, and this fuel pipe (not shown) is used for to the oil sprayer fuel feeding.In addition, in oil sprayer, be provided with 96, one O V-shaped rings 98 of a spiral compression spring and a circular cowling 100 between two

assemblies

52 and 54.

The Figure 4 and 5 amplification shows the valve assembly 52 that does not contain O V-shaped ring 88, valve seat supporting element 58 and valve body spare 68 cover ground connection are assembled together, and the latter's a bottom engages the former top (as shown in the figure) vertically, so that between them, settle and fixedly maintain aperture spare 60, valve base piece 62, washer part 64 and retainer 66.The upper surface of valve seat supporting element 58 define one with axis 57 rectangular planes 102, but it is completed a business transaction with hole 104 outside alternate and concentric annular groove 106 and chamferings 108 at its radially outward edge place by the hole 104 at center, one with axis 57.Hole 104 passes completely through valve seat supporting element 58, and it has a less relatively round entrance 104a, is positioned at the meet outlet 104b of a part and a relatively large truncated cone that is positioned at place, oil sprayer bottom of the upper surface of valve seat supporting element 58 and aperture spare 60.

Aperture spare 60 is circular and is made by the thickness even metal that itself is shown in Figure 13 and 14.It has one with axis 57 rectangular flat central areas 110, its outward edge is processed into the skirt section 111 of a truncated cone.The heart therein, it have one with axis 57 coaxial and independent small sircle holes 112 that aim at the inlet 104a in hole 104, the lower surface overhead of central area 110 is on the surface 102 of valve seat supporting element 58, skirt section 111 is assembled on the chamfering 108 suitably.

Itself be shown in valve base piece 62 in Figure 11 and 12 and be circular and have the flat upper and lower surface that is parallel to each other, its lower surface overhead on the upper surface of aperture spare 60 and have one with axis 57 coaxial so central, circular through hole parts 114 that also aim at aperture 112.

The outward edge of an axial intermediate portion of the circular inner wall face of main component 68, the lower surface of valve base piece 62, the radially outward edge of chamfering 108 and the surface, skirt section 111 that deviates from chamfering 108 constitute a ring inner space, and an O V-shaped ring 116 is housed in this space.O V-shaped ring 116 has three circular loop Line of contact that separate, wherein, article one, line contacts with the outward edge lower surface of valve base piece 62, the second line contacts with the surface that the outside top in skirt section 111 is pointed to, article three, line contacts with the circular inner wall face of valve body spare 68, like this, seal ring 116 provides sealing, prevents that fuel oil from spilling from oil sprayer inside by the telescopic lap splice that valve seat supporting element 58 and valve body spare 68 are assembled together.

Washer part 64 is that cross section is the ring part of rectangle, and it has certain axial and radial dimension, and its external diameter radially outwards fits closely in the internal diameter wall of valve body spare 68.On inward direction vertically and radially, washer part 64 is associated with a valve-iron core group component 70, and the back also will describe in detail.Can point out that in addition the thickness of washer part 64 has been determined the stroke of these parts 70 between the enable possition of oil sprayer when valve-iron core group component 70 is landed on the valve base piece 62 closed position of back oil sprayer and valve-iron core group component 70 apical grafting retainers 66.

Retainer 66 itself is shown among Figure 15-18, helps to understand it referring to these figure and how to be associated with washer part 64, valve body spare 68 and valve-iron core group component 70.Retainer 66 is the thin dish of an annular substantially, and it has the inside and outside circle diameter, and except a waveform stop surface part at its radially inward edge place, whole thickness is uniform.The waveform stop surface partly comprises a series of circumferentially alternate grooves 118 in the lower surface that is arranged on the retainer radially inward edge.The shape of each groove is about rectangle, and axially downwards and radially inwardly open wide, other direction is sealed, and therefore, can think that it is axial walls (122), radial wall (120,124 and 126) that each groove has four wall portions.These grooves are identical and center on the circumferential setting of retainer internal diameter with identical distance equably.Because oil sprayer has some characteristics that the back will describe in detail, retainer 66 both can be the magnetic conductivity materials with smaller, it also can be the bigger material of magnetic conductivity, when retainer adopts hardened material, during as Chilled Hardened Steel, it can implement its locking function better in the valve operation of more times number, as the back also will be described in more detail, retainer is quite thin, so groove is just thinner.

A kind of method of processing these grooves is to adopt acid etching, and the retainer blank is the dish type stamping part, and the part that must not corrode on it is coated with photosensitive corrosion resistant material, and the part that corrode does not then cover.Like this, the place that process these grooves is open, and dish is placed the regular hour in acid, makes the drill traverse in the dish lose the desired degree of depth, takes out dish then from acid, removes the photosensitive corrosion resistant material on the dish.The central hole of retainer can process before corroding these grooves of processing in a similar fashion.

The waveform inward flange of the retainer 66 that is formed by groove 118 provides a sclerosis stop surface that is arranged on valve-iron core group component 70 motion paths, is connected with valve-iron core group component 70.The purpose that these grooves are set is to dock back minimizing surperficial area of contact between the two with retainer 66 at valve-iron core group component 70, like this, stiction is less to the blanketing of two isolation of components when the oil sprayer operation is closed, and does not have the situation of groove different with retainer.Advantageously, these grooves can not destroy the integrity of retainer, because each groove all is four sides sealing and have only the two sides to open wide.

Return now and read Fig. 4, can explain, the radially outer of the uniform retainer 66 of whole thickness partly is maintained on the internal face of the upper surface of washer part 64 and valve body spare 68 one radially between the shoulder 128.Radially, retainer 66 has a drive fit with the internal face of axially extended valve body spare 68, so it is coaxial with axis 57, and shoulder 128 is radially to projecting inward, the internal diameter that surpasses washer part 64 approximately, thus the radially inward edge of retainer 66 part all with 128 smooth joining of shoulder.In facing surfaces, the waveform district that is limited by groove 118 places along the setting radially inwardly of the internal diameter of washer part 64.

Referring now to Fig. 6-10,, describe valve-iron core group component 70 in detail, this assembly parts comprises two parts, be valve element 130 and iron core 131, they are bound up, valve element 130 is disks, its upper surface is flat, its lower surface also is flat, be used to settle one radially

inner seal ring

132 and 134, two rings of radially external cyclization each an axial dimension is all arranged, uniform ridge is all arranged, and the axial dimension of these two rings is identical, and the radial cross-section of adapter ring 134 is rectangles, and seal ring 132 is trapezoidal, as finding out best among Fig. 9, seal ring 132 upwards is continuous in week, and the circumferential continuity of adapter ring 134 since following situation and destroyed, promptly valve element 130 has two manholes 136,138, they are not concentric with axis 57, and on the both sides relative along diametric(al), intersect with adapter ring, cause the circumferentially discontinuous of adapter ring 134 thus, the closed condition when Fig. 4 illustrates valve element 130 and is closed on valve base piece 62.Under this closed condition, seal ring 132 circumferentially seals continuously with valve base piece 62 around through hole 114 and contacts.

Valve element 130 can be made with the common metal processing technology, and it can be made with the bar machining fully, also can be processed into dish earlier by accurate

die pressing.Hole

136 and 138 can produce by punching press or machining, and seal ring and adapter ring then produce by turning dish on lathe, utilizes no abrasive material processing (being that grind the square position) can obtain level and smooth surface finishment and dimensional accuracy.

Iron core 131 is the parts along the sub-circular of the string truncation of a circle, therefore, as shown in Figure 6, the periphery of iron core 131 comprise two be positioned at one with the concentric imagination circle of axis 57 on a pair of adjacent end portion of 140,142 and one of circular gabarit parts and part 140, the 142 flat-cut part 144 of joining.Another of part 140,142 separated by one in the iron core axially extended perforation otch 146 adjacent end portion, connects otch 146 approximate U-shapeds, and it has three sides 148,150,152.Side 148 and 150 axial dimension equate, but the axial dimension of side 152 is less than the axial dimension of side 148 and 150, and this is because a breach 154 perpendicular to part 144 that radially extends is arranged in upper half part of iron core, as shown in Figure 6.There is a surperficial from it circular blind hole 156 that extends to 3/4ths places of about iron core axial dimension in the central authorities of iron core.

Iron core 131 is coupled on the valve element 130, and makes hole 156 coaxial with circular valve element.In this assembly, iron core 131, and makes and connects otch 146 and align with hole 138 along circumferential orientation with respect to valve element 130, and this also makes the major part in hole 136 do not covered by

iron core.Element

130 and 131 to interconnect be to realize by produce a weld seam 157 in the laser bonding of central authorities.

It is asymmetric with respect to the axis 57 of valve assembly that the shape of resulting valve-iron core group component 70 makes it, and as the back will be explained in detail, this point made valve-iron core group component 70 produce a kind of banking motion when working.

Describe the parts of Power Component 54 now in detail.The details of the frame 72 that can see among the 19-23 at first with the aid of pictures, the effect of frame 72 comprises: a magnetic flux path is provided, and the magnetic flux that the coil 160 of coil and coil carrier assembly 74 is sent is connected on the valve assembly 52, so that operating valve-iron core group component 70; Parts are provided, and thus, oil inlet pipe 76 can make frame 72 and coil and coil carrier assembly 74 coaxial positioning.Frame 72 comprises two

sides

166 and 168 at the end 162 that a central circular hole 164 arranged, and 162 opposite side edge extends the end of from vertically in

side

166 and 168, surrounds a tubular top 170 and also links with it.Top 170 comprise one with complete oil sprayer in the coaxial manhole 172 of axis 57,

side

166 and 168 is being crossed on frame 72 directions relative mutually through

lateral opening

174 and 176, this opening 174,176 relative mutually and with side 166,168 one-tenth an angle of 90 degrees.

Except coil 160, coil and coil carrier assembly 74 also comprise a coil carrier 178, and it has a tubular core 180 that has circular flange 182,184 in relative end.The end that constitutes the wire of coil 160 is connected to the interior end of each electric terminal 186,188, and electric terminal 186,188 is embedded in the extension with the somewhere extension of certain angle from flange 182 peripheries of coil carrier 178.The outer end of electric terminal 186,188 is freely, so that provide matched with each terminal of corresponding plug (not shown), makes exciting current flow to coil 160 selectively through this plug, so that selectively start oil sprayer.Coil and coil carrier assembly 74 inserts in one of them

lateral opening

174 and 176 and links with frame 72, and before oil inlet pipe 76 inserts through holes 172 and passes in the tubular core 180 tubular core 180 aimed at through hole 172.

How explanation now assembles oil sprayer.The upper end shape of valve body spare 68 can make it can overlap with hole 164 that ground connection is connected and dock with frame 72, makes vertically and radially location relatively mutually of frame 72 and valve body spare 68.After frame and valve body spare are associated, for example adopt that laser bonding is tied them, seal ring 98 and cover 100 are placed in the parts 68.Coil and coil carrier assembly 74 are placed in the frame, and oil inlet pipe 76 passes tubular core 180, the seal ring 98 of through hole 172, coil carrier 178 and covers 100.The purpose that is shown in detail in the cover 100 in Figure 24 and 25 is to guarantee seal ring 98 and valve-iron core group component 70 axially locating separatedly.Notice that the lower inner edge of cover 100 is also inwardly recessed, so that cover can not contact valve-iron core group component 70.

Oil inlet pipe 76 is located vertically rightly by a fixed block, make it then to connect mutually with frame 72, this connection is by a circular trough 192 being set so that reduce the wall thickness (as shown in the figure) of pipe partly in top 170, in the place of the wall thickness that has reduced pipe two parts being tied by laser bonding then and realizing.Attention is when locating oil inlet pipe, and conical spring pad 80 flexibly is fitted between the flange 182 of a shoulder 190 that extends around the oil inlet pipe outside and coil carrier 178.The fixed block that is used for the oil inlet pipe location makes the lower end of pipe locate with respect to shoulder 128, and these assembled parts are placed in the mould (not shown), and form a mold pressing part 56 on them, with the body shape shown in the formation.Outside the end of terminal 186 and 188, mold pressing part 56 encases all parts, and forms a surrounding layer around these outer ends, is used to accept to contain an attachment plug (not shown) of the terminal that engages with terminal 186 and 188.Conical spring pad 80 forms an interlayer between the upper end of coil carrier 178 and oil inlet pipe 76, and form an interlayer by the upper rim that coil carrier is withstood on valve body spare 68 at the lower end of coil carrier, these interlayers prevent that plastic material from clamp-oning in the internal valve mechanism.

Afterwards, the remainder of valve assembly is assembled in the lower end of opening wide of valve body spare 68, and spring 96 is placed between iron core 131 and the adjutage 78.Valve seat supporting element 58 is clamped on the shoulder 128 valve base piece 62, washer part 64 and retainer 66, then it and valve body spare 68 is tied in the position that is designated as 196, for example uses laser bonding.Mold pressing part 56 has two radial holes 198,200 at pipe in 76 and 78 bonding lands, correctly locatees by make adjutage 78 in oil inlet pipe 76, and 198,200 passages that provide are tied (as passing through crimping) with two pipes and calibrate oil sprayer through the hole then.When oil sprayer was in use, liquid fuel such as gasoline were introduced into oil inlet pipe 76, entered in valve-iron core group component 70 inner spaces of living in by managing 76 fully after being filtered by the filter in the oil circuit 82.Fuel can easily pass through valve-iron core group component 70, reaches in the annular space at radial outside place of annular space between seal ring and the adapter ring and adapter ring.

When coil 160 ends were energized, valve element 130 was landed on the valve base piece 62, made seal ring 132 that hole 114 and hole 136 and 138 liquid ground are isolated.The upper surface of ring 132 and valve base piece 62 has sufficiently high surface finishment and matching surface is long-pending, and they are providing a metal to metal seal in such cases, does not therefore have fuel to flow out oil sprayer.When coil 160 is energized, produce a magnetic flux when opening of valves, drive coil 160, it produces one and acts on the lower shaft end of oil inlet pipe 76 and the magnetic force between the iron core 131, because iron core has aforesaid shape, this masterpiece is used on valve-iron core with axis 57 off-centre.Though the internal diameter of the external diameter of valve element 130 and washer part 64 is drive fits, this cooperation also is not enough to be tightened to absolute limitations valve-iron core group zoarium and strictly moves axially towards oil inlet pipe 76, but the gravitation of allowable offset effect tilts valve-iron core group component, runs into retainer 66 up to incline section.Therefore, when beginning to tilt when the excitation of valve-iron core group component response coil 160, valve-iron core group component constantly tilts with respect to axis 57, up to incline section apical grafting retainer 66.Herein, valve-iron core group component continues motion, but valve-iron core is to tilt in the place around its apical grafting retainer 66 now, continuation along with banking motion, the axis tilt of valve-iron core group component reduces, and because the whole edge of valve element 130 docks with retainer 66 during, reach again with axis 57 and overlap by stop when banking motion.Therefore an interface part of valve-iron core group component 70 has been represented at this edge of valve element 130, should be noted that, behind the opening movement of having prevented valve-iron core group component 70, iron core still with the end of oil inlet pipe 76 separately, along with the valve element leaves from valve seat, fuel oil can flow through hole 114,112 and 104, from the bottom ejection of oil sprayer.

When the excitation of coil 160 stopped, magnetic pull also stopped, and spring 96 withstands on the valve base piece 62 with promoting valve-iron core group component sealing, thereby ends to pass through flowing of oil sprayer, thereby fuel oil stops the bottom ejection from oil sprayer.Should be noted that the thickness that the axially movable path increment that valve-the iron core group component is done equals washer part 64 deducts the thickness of valve element 130 between closed position and fully open position.

The structure of valve assembly and layout have important advantage, because valve-iron core group component comprises independent iron core and valve element, can in the operating life of oil sprayer, guarantee the made valve element that the appropriate sealing of it and valve base piece contacts best with a kind of valve element that can make, and with a kind of made iron core with suitable ferromagnetic characteristic.Adopt laser bonding to guarantee the reliable connection of two parts by the mode of stating.A stator of the magnetic flux that the lower end formation coil 160 of oil inlet pipe 76 sends, magnetic flux laterally passes through the working clearance, act on the iron core 131, the magnetic flux that returns passes through to arrive valve body spare 68 from the horizontal side of iron core 131, and gets back to the pipe 76 of the upper end of coil and coil carrier assembly 74 thus through frame 72.As a result, retainer 66 does not constitute the part of magnetic flux path basically, so it can be with a kind of hard material manufacturing, and is fit to well use with the valve element 130 of sclerosis.When the assembling oil sprayer, the peripheral orientation of valve assembly is unnecessary, but the nonequilibrium design of valve-iron core group component will guarantee that it always tilts around the same position that makes progress in valve element week, and irrelevant with its concrete circumferential orientation in oil sprayer, and this will help guaranteeing the operating conformity of valve.

Figure 26 and 27 discloses and has been designated as 66 ' another embodiment of retainer.Similar to retainer 66, retainer 66 ' also comprise a waveform stop surface part, but its shape is slightly different with retainer 66.Retainer 66 ' be a circular ring part, its thickness is uniform along the radially outward direction of the inside wave edges in footpath that constitutes the stop surface part.Footpath inwardly wave edges can be believed to comprise an annular groove 66a ', and this groove contains the series of identical round button 66b ' between homogeneous phase.Therefore, similar to retainer 66, can consider retainer 66 ' waveform comprise a series of grooves arranged side by side, and make button 66b ' between groove.Utilize acid etch technique processing groove 66a ', the height of button equals the degree of depth of groove, thereby the end face of button is arranged in the identical plane of corresponding shaft end face of the no waveform part of retainer.

Figure 28 and 29 has described and has been designated as 66 " another embodiment of retainer; to retainer 66 and 66 ' similar; retainer 66 " also comprises a waveform stop surface part, but its shape is slightly different, " be a circular ring part, its thickness is uniform along the radially outward direction that it constitutes the inside wave edges in footpath of stop surface part to retainer 66.This stop surface part can be believed to comprise an annular groove 66a ", this groove contain a radially inner wall and axial walls and along the space portion 118 " and ridge 118 " of a series of circumferential interleaved of radially inward edge '." ' outward edge from axial cell wall towards valve element 130 protuberance, they provide actual stop surface to ridge 118, are similar to the button 66b ' in Figure 26 and 27.Ridge 118 " ' have than space portion 118 " much bigger circumferential radian scope, in an illustrated embodiment, evenly be provided with eight such ridges and eight such space portions around retainer, the circumferential radian scope that shown embodiment illustrates each space portion is 15 degree, the circumferential radian scope of each ridge is 30 degree, have been found that this can make issuable stiction reach minimum at the valve element from its enable possition when its closed position moves, and the valve element impacts enough surface areas of retainer when opening of valves is provided.Also it is contemplated that the size that adopts other, as in one embodiment, space portion radian scope is 10 degree, and ridge radian scope is 50 degree.Retainer 66 " the feature of radially inward edge also can obtain by the acid etching processes.The breakthrough imagined among Figure 28 circle line shows the profile scope of valve element 130, expresses at groove 66a " the annular space at radially outward edge place be not capped when also flatly stopping on the retainer at last when valve element 130 engages.Above explanation discloses a kind of present preferred embodiment that is used for the improved novel oil sprayer of internal-combustion engine, and claims of the present invention as described later.

Claims

1. an oil sprayer (50), it has one with the filler opening of a pressured fluid fuel source fluid ground UNICOM and one fuel oil to be sprayed the oil outlet of oil sprayer, and comprises:

Have an electromagnetic actuators part of a longitudinal axis (57) or knock a power assembly (54) and a valve portion (52), this electromagnetic actuators partly comprises a coil and coil carrier assembly (74), this valve portion comprises a valve body (68), contain a valve-iron core group component (70) in this valve body (68), it can move unlatching and operating position selectively and make oil sprayer opening and closing fuel oil flowing between filler opening and oil outlet, when being energized, electromagnetic actuators electromagnetic force is acted on valve-iron core group component by oil inlet pipe (76), valve base piece (62) in the valve body, this valve base piece has a valve seat surface towards valve-iron core group component, this valve base piece has central, circular through hole parts (114), these parts (114) have an inlet and the outlet of leading to oil outlet at the valve seat surface place, pass the manhole (136 of valve-iron core group component, 138), be used for to have entered at the filler opening place surface of the fuel delivery of oil sprayer to described valve-iron core group component, in valve-iron core group component one the valve seat surface facing surfaces with valve base piece, spring members (96), these parts are elastically biased toward valve-iron core group component so that described surface is landed on the valve seat surface of valve base piece along described axis substantially, and when electromagnetic actuators starter gate valve-iron core group component makes oil sprayer be closed in fuel flow between filler opening and the oil outlet, from central, circular through hole parts place sealing manhole, valve-iron core group component relative stator parts, make when electromagnetic actuators moves and is failure to actuate, valve-iron core group component is subjected to the effect of power, make it towards the valve base piece part that moves and lift off a seat, be in the retainer (66 that is provided with under the interference relationships with the lift off a seat motion of part of valve-iron core group component, 66 ', 66 "); it is by docking and this motion of limiting valve-iron core group component with valve-iron core group component; this stop component comprises a retainer, it is characterized in that:

This retainer has a waveform stop surface part, this stop surface is relative with the interface part of valve-iron core group component, the waveform stop surface of this retainer partly comprises some waveform patterns such as groove (118,66a ', 66a "); round button (66b "), ridge (118 " '); they are relative with the interface part of valve-iron core group component; and limit by the ridge of a series of extending circumferentiallies (118 " '), the week that these ridges are arranged on the groove (66a ') in the radial edges of retainer upwards and by some space portions (118 ") upwards separated in week; the ridge of this extending circumferentially vertically from retainer towards valve-the interface part projection of iron core group component; described groove is limited by an axial walls (122) and a radial wall (126); wherein axial walls (122) face valve-iron core group component interface partly and an axial end of sealing this groove, and radial wall (126) seals a radial extremity of this groove.

2. according to the oil sprayer of claim 1, it is characterized in that, arcuate member along extending circumferentially is arranged equably around the whole circumference of retainer, makes each arcuate member have and is roughly the 30 circumferential scopes of spending, and (118 ") have the circumferential scopes that are roughly 15 degree in each alternate space portion.

3. method of making claim 1 and 2 described oil sprayers may further comprise the steps:

In an edge of a uniform punching press diskware of thickness, process a waveform patterns such as groove (66a "), space portion (118 "), ridge (118 " '); form a waveform stop surface in the retainer thus; this retainer is arranged in the oil sprayer; make when oil sprayer is operated and opens; this valve member is with this waveform stop surface of apical grafting by acid etching; and when oil sprayer was operated and cuts out, the influence that this waveform stop surface is bonded on the retainer valve member reduced to minimum degree.