CN2779091Y - Multi-hole type fuel nozzle - Google Patents
Multi-hole type fuel nozzle Download PDFInfo
- Publication number
- CN2779091Y CN2779091Y CN 200420114179 CN200420114179U CN2779091Y CN 2779091 Y CN2779091 Y CN 2779091Y CN 200420114179 CN200420114179 CN 200420114179 CN 200420114179 U CN200420114179 U CN 200420114179U CN 2779091 Y CN2779091 Y CN 2779091Y
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- oil
- nozzle
- valve
- valve body
- fuel
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Abstract
The utility model relates to a novel multi-hole type oil nozzle, which belongs to the technical field of an engine and comprises a cavity, an oil valve and a nozzle cap. When fuel oil pressure in an oil cavity is greater than the preset value, the oil valve opens and fuel oil is jetted through the nozzle cap. The oil valve is composed of a valve body, a valve seat and a spring, wherein the rear end of the valve seat is connected with the cavity to form an oil cavity, and the cavity is provided with an inlet passage entering the oil cavity; the spring is positioned in the oil cavity and acts between the valve body and the valve seat to make the oil valve closed; the front end of the valve seat is connected with the nozzle cap to form a residual volume, and the nozzle cap is provided with a jet hole connected with the residual volume. The utility model provides a fuel oil nozzle having a new structure for an impulse type fuel oil pump in an electronic fuel oil injection system, and has the advantages and the improvements of small size, simple structure, low cost and convenient setting of injection direction.
Description
Technical field
The utility model belongs to technical field of engines, particularly a kind of oil nozzle that is applied to the pulsed fuel pump of electronic fuel injection system.
Background technique
A kind of novel intake port injection that Chinese patent application CN1474910A provides, the in-cylinder direct injection system that Chinese patent ZL01103954.X and U.S. Pat 6422836B1 propose adopts the pulsating electronic fuel injection apparatus as its oil supply unit.Above-mentioned pulsating electronic fuel injection apparatus is made of pulsed oil pump and oil nozzle two-part, forms a pump nozzle or a pump and a nozzle unit that is connected by high-pressure oil pipe.This nozzle that is applied to the pulsed oil pump wants cube little, and is simple in structure, can set injection direction more easily, and the seat surface of nozzle is avoided the direct infringement of flame.
Above-mentioned pulsed fuel injection apparatus what generally adopt is a kind of outward opening axonometer nozzle.The axonometer nozzle has two big classes: a class is a swing-in, i.e. the direction of valve body unlatching is opposite with injection direction, and for example, the used nozzle of some early stage diesel engines with antechamber belongs to this class; Another kind of is outward opening, and promptly the opening direction of valve body is identical with injection direction.With respect to the swing-in pintaux noz(zle), it is simple many that outward opening structure is wanted.But obviously there is following shortcoming in outward opening axonometer nozzle: the first, and the direction of spray-cone can only be coaxial with fuel tap, can not change flexibly; The second, the fuel tap seat surface is exposed to the external world, influences working life.Because the injection direction of this outward opening axonometer nozzle can not be set flexibly, above-mentioned various pulsed pump nozzles are greatly limited on using.For example, when pulsed pump nozzle application during, because of the restriction of injection direction makes that intake duct is difficult to arrange in motorcycle; By the board in the application of machine, can cause serious problems such as seat surface sinking directly be exposed to the flame of firing chamber because of the sealed seat surface of nozzle among.
In the prior art, multi-hole nozzle can be set the direct infringement that injection direction and seat surface can be avoided flame.Multi-hole nozzle is widely used in the oil supply system of reciprocating engine, and it mainly comprises fuel tap and spray orifice, and wherein fuel tap mainly is made up of spindle and valve seat as valve body, spindle and valve seat be the high precision accessory often, especially valve seat is a kind of mesopore one block surface structure, and difficulty of processing is high.The disadvantage of this multi-hole nozzle is: volume is big, complex structure, manufacture cost height.
Obviously, existing nozzle application is all not ideal enough in above-mentioned pulsating electronic fuel injection apparatus.It is little, simple in structure that they can not satisfy volume simultaneously, and low cost of manufacture can be set injection direction easily, and seat surface is avoided the requirement of combustion flame infringement.Therefore, need a kind of brand-new nozzle arrangements of model utility, can satisfy the requirement of the pulsed fuel pump that is applied to the electronic fuel injection system oil nozzle.
Summary of the invention
The utility model is at the problems referred to above, purpose be to provide a kind of volume little, simple in structure, can set the fuel injection direction flexibly, seat surface is avoided the novel fuel nozzle of flame combustion chamber infringement.
The purpose of this utility model is achieved through the following technical solutions:
A kind of novel porous formula fuel nozzle, it comprises: cavity, fuel tap and cap of spraying nozzle, when the fuel pressure in the described oil pocket is higher than institute's definite value, fuel tap is opened, fuel oil sprays by cap of spraying nozzle, it is characterized in that: fuel tap is made up of valve body, valve seat and spring, the rear end and the cavity of valve seat are connected to form oil pocket, cavity is provided with the inlet channel that enters oil pocket, spring is positioned at oil pocket, and act between valve body and the valve seat fuel tap cuts out, the front end of valve seat and cap of spraying nozzle are connected to form remaining volume, and cap of spraying nozzle is provided with the spray orifice that is connected with remaining volume.
Fuel pressure unlatching in the fuel tap dependence oil pocket of the oil nozzle of the utility model relies in oil pocket and the spring force that acts between valve body and the valve seat cuts out, thereby makes valve body one spring one valve seat form the fuel tap integral body of a compact structure.
The seat surface of the valve seat of the oil nozzle of the utility model can be that a big end is opened the inner conical surface to remaining volume, also can be a plane consistent with front-end face.According to the relation between spring and valve body and the valve seat, the opening direction of valve body under the oil pressure effect can only be consistent with the flow direction of fuel oil, therefore the valve seat seat surface being set as big end, to drive the conical surface to remaining volume be a kind ofly more preferably to select, since its existing better seal, the power of taking a seat that also can bear valve body.If the cracking pressure of fuel tap is lower, the front-end face of valve seat can be made as seat surface, seat surface also can adopt certain sealing material.
The seat surface of the valve body of the utility model can be the male cone (strobilus masculinus) of a big end towards remaining volume, also can be a sphere.The male cone (strobilus masculinus) of valve body can have identical angle to strengthen its wear resistance with the inner conical surface of valve seat, also can exist certain difference to improve its sealing.The seat surface of valve body is made as sphere can be obtained simplifying on manufacturing process.
The valve body lift of the utility model can be set with the distance of valve seat end face by the spring support of regulation valve body, also can set by the distance between the internal face of remaining volume in regulation valve body end face and the cap of spraying nozzle.The lift of valve body is bigger to the nozzle flow influence, and preceding a kind of setting means helps the integration manufacturing of fuel tap, and then a kind of mode then can improve the Security of use.
The size of the remaining volume of the utility model and shape can be adjusted by the size and dimension that change is located at the excrescence of valve body front end.The size of remaining volume and flow and the quality that shape directly influences injection, under the prerequisite that flow guarantees, remaining volume is more little favourable more to engine combustion.
The valve seat of the utility model is provided with oilhole, is provided with the fuel oil filter screen around oilhole, thereby guarantees to have only the position that could arrive valve body and valve seat precision-fit through the fuel oil of filter screen.Have accurate matching relationship between valve body and the valve seat, the granule foreign that exists in the fuel oil is bigger to its proper functioning influence, and described filter screen is last one barrier that is provided with for granule foreign.
The direction of the spray orifice of the utility model can with the axis normal of fuel tap, also can be angled or parallel, thus can set injection direction neatly.The injection direction of fuel oil is most important for the combustion system of motor, and for example, tuned port injection requires fuel oil can be directly injected to suction valve, direct injection combustion system require can be directly or indirect injection near spark plug.The utility model has overcome in the injection apparatus such as pulsed pump spray nozzle device of prior art, is difficult to realize the problem of multi-faceted setting injection direction.
Be provided with an one-way valve at the inlet channel place of described oil nozzle, its objective is the residual pressure that keeps in the oil pocket, when temperature raises, influence normal injection to prevent the bubble generation.
The oil nozzle of the utility model, a kind of scheme of comparative optimization is: the place is provided with one-way valve at inlet channel, to keep the residual pressure in the oil pocket and to prevent to be heated back generation fuel-steam, the shape of valve seat seat surface is one and opens to remaining volume inner conical surface, the valve body seat surface is a male cone (strobilus masculinus) that adapts with valve seat seat surface shape, valve body is provided with ammunition feed spring bearing, the lift of valve body is determined by the distance between described spring support and the valve seat ear end face, on valve seat, be provided with the oilhole that enters fuel tap, be provided with filter screen, the axis normal of spray orifice and fuel tap around oilhole.
In a word, one of basic structural feature of the oil nozzle of the utility model, promptly spring provides a simple structural type among the oil pocket and act between valve body and the valve seat fuel tap cuts out; Two of essential characteristic, promptly the front end at fuel tap is provided with cap of spraying nozzle, and this cap can be isolated engine chamber flame and nozzle seat surface mutually; Three of essential characteristic, promptly one or be opened on the cap of spraying nozzle more than one spray orifice, thus can change the coverage area of injection direction and spraying neatly.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is done and to be described in further detail:
An embodiment's of the fuel nozzle that Fig. 1 provides for the utility model longitudinal sectional view;
Another embodiment's of the fuel nozzle that Fig. 2 provides for the utility model longitudinal sectional view;
The Application Example of the fuel nozzle that Fig. 3 provides for the utility model.
Embodiment
Fig. 1 has shown the embodiment's 1 of the utility model oil nozzle structure.
Fuel nozzle shown in Figure 1 comprises fuel tap 10 and cavity 31 and the cap of spraying nozzle 21 that is fixed in valve seat 12 front ends.
One end of spring 13 is resisted against the spring support of being located on the valve body 11 16, and the other end is resisted against on the seating spring seat 12c; Under the effect of spring 13, the seat surface 11b of valve body 11 and valve seat seat surface 12b fit, make fuel tap 10 be in closed condition, valve rod 11a is provided with the runner that passes through for fuel oil, and the fuel oil in the oil pocket 32 arrives fuel tap seat surface 11b/12b by oilhole 14 and described runner.
Because fuel tap 10 is to rely on oil pressure to open, spring 13 is within the oil pocket 32 fully, and acts between valve body 11 and the valve seat 12, forms the fuel tap integral body of a compact structure.Thereby can realize miniaturization, for example, the length size can be controlled within the 30mm.Than multi-hole nozzle in the past spring 13 is acted on structure excellence between valve body 11 and the cavity 31.
Cap of spraying nozzle 21 is provided with the spray orifice 23 that is communicated with remaining volume 22, the direction of spray orifice 23 can be perpendicular with the axis of fuel tap 10, also can be according to requirement to injection direction, set or the change injection direction, spray orifice 23 can be one or more than one, a plurality of spray orifices can improve atomization quality, change the distribution of injection direction and mist of oil neatly.This characteristic of the axis normal of injection direction and fuel tap 10 that can realize has very high value in the application of motorcycle, because otherwise will change the design of car load again even influence the performance of motor, for example, this nozzle can be adapted to the various complete vehicle structures of 125CC riding-type motorcycle that existing market is popularized.
Near remaining volume 22 1 sides, when the pressure of the fuel oil in the oil pocket 32 during greater than the pretightening force of spring 13, valve body 11 moves and opens fuel tap 10 to the direction of remaining volume 22 to the seat surface 11b of valve body 11 with respect to the seat surface 12b of valve seat 12.
The seat surface 12b of valve seat 12 is the inner conical surface of axle center symmetry, big mouth is opened the direction to remaining volume 22, the taper seat surface 12b of the seat surface 11b of valve body 11 and valve seat 12 is a pair of surface of contact that can form seal band, and the also big accordingly end of the conical surface 11b of valve body 11 is towards remaining volume.
Be provided with the excrescence 15 of a frustoconic shape in the taper bottom surface of valve body 11, excrescence 15 adapts with the geometrical shape of remaining volume 22, thereby forms certain fluid passage and reduce the volume of remaining volume 22.
Be provided with filter screen 40 around oilhole 14, fuel oil must just can enter precision-fit positions such as the seat surface 11b/12b of fuel tap 10, the passage 14a that is slidingly matched through filter screen 40.
The unlatching of valve body 11 can be designed to by valve seat end face 12a institute spacing as required, also can be spacing by wall 22a institute within the remaining volume 22, and the spacing of present embodiment finished by valve seat end face 12a.
For the described oil nozzle of present embodiment, a typical working procedure is: the fuel oil that derives from fuel filler 33 enters oil pocket 32, when oil pressure to valve body 11 power that produces can overcome the pretightening force of spring 13 time, valve body 11 moves to remaining volume direction, fuel tap 10 is opened thereupon, fuel oil enters fuel tap 10 by filter screen 40 through oilhole 14 and arrives remaining volume 22, again by spray orifice 23 ejections, the unlatching of valve body 11 is subjected to the restriction of end face 12a, this moment, valve body 11 reached its lift, and when the active force that produces for valve body 11 when the oil pressure in the oil pocket 32 was lower than the active force of spring 13, valve body 11 began to take a seat, fuel tap cuts out thereupon, a fuel injection end cycle.Fig. 2 has shown oil nozzle embodiment's 2 of the present utility model structure.
Oil nozzle structure as shown in Figure 2, be provided with an one-way valve 50 in fuel filler 33 ingress, one-way valve 50 is to be made of unidirectional valve seat 51, check valve body 52 and spring 53, one end of spring 53 is pressed in valve body 52 on the seal face of valve seat 51, the other end roof pressure is on cavity 31, and the oil pocket 55 in the one-way valve 50 keeps being communicated with fuel filler 33 and oil pocket 32.The purpose that one-way valve 50 is set is that AEI After End of Injection keeps the remaining oil pressure in the oil pocket 32, and can prevent the evaporation of high temperature gasoline.
The shape of the remaining volume 22 of structure shown in Figure 2 helps the circulation of fuel oil on the one hand, can reduce the volume of remaining volume on the other hand.
The cap of spraying nozzle 21 and the cavity 31 of structure shown in Figure 2 are connected as a single entity, and fuel tap 10 is positioned at wherein oil pocket 32 and remaining volume 22 are separated.
Other parts are same as embodiment 1.
Application Example:
System shown in Figure 3 is that one of oil nozzle of the present utility model typical case uses, and illustrated pulsating electronic fuel pump 3 and combining of oil nozzle 1 of the present utility model have formed the fuel feeding assembly of a petrol engine port fuel injection system.
Shown in the system, fuel oil from fuel tank 6 enters pulsating electronic fuel pump 3 with vapor-liquid separator 7 and low pressure oil inlet pipe 4 after filtration, under the driving of PWM voltage wave, part fuel oil is sent to nozzle 1 by fuel pump 3, spray into the intake duct of motor 2 then, another part fuel oil is got back to fuel tank 6 through return tube 5, is provided with vapour-discharge tube 8 in the fuel tank.
Said system is equally applicable to in-cylinder direct injection system and alternative-fuel engine, and at this moment, nozzle 1 injects fuel directly into cylinder.
Oil nozzle of the present utility model shown in its advantage of application of system fairly obvious: because the size restrictions of pulsating electronic fuel pump 3 and its requirement to installation direction, be easy to produce and car body between the assembling interference problem, oil nozzle of the present utility model can solve this type of problem effectively by its setting of injection direction flexibly.
Claims (11)
1. novel porous formula fuel nozzle, it comprises: cavity (31), fuel tap (10) and cap of spraying nozzle (21), it is characterized in that: fuel tap (10) is by valve body (11), valve seat (12) and spring (13) are formed, the rear end of valve seat (12) and cavity (31) are connected to form oil pocket (32), cavity (31) is provided with the inlet channel (33) that enters oil pocket (32), spring (13) is positioned at oil pocket (32), and act between valve body (11) and the valve seat (12) fuel tap (10) cuts out, the front end of valve seat (12) and cap of spraying nozzle (21) are connected to form remaining volume (22), and cap of spraying nozzle (21) is provided with the spray orifice (23) that is communicated with remaining volume (22).
2. novel porous formula fuel nozzle as claimed in claim 1 is characterized in that: the seat surface (12b) of valve seat (12) is that a large end face is opened the inner conical surface to remaining volume (22).
3. novel porous formula fuel nozzle as claimed in claim 2 is characterized in that: the seat surface (11b) of valve body (11) is the male cone (strobilus masculinus) of a big end towards remaining volume (22).
4. novel porous formula fuel nozzle as claimed in claim 2 is characterized in that: the seat surface (11b) of valve body (11) is a sphere.
5. novel porous formula fuel nozzle as claimed in claim 1 is characterized in that: the unlatching lift of valve body (11) is subject to the end face (12a) of valve seat (12).
6. novel porous formula fuel nozzle as claimed in claim 1 is characterized in that: the unlatching lift of valve body (11) is subject to wall (22a) within the remaining volume of cap of spraying nozzle (21).
7. as the described novel porous formula fuel nozzle of one of claim 1～6, it is characterized in that: the front end that is positioned at remaining volume (22) at valve body (11) is provided with an excrescence (15).
8. as the described novel porous formula fuel nozzle of one of claim 1～6, it is characterized in that: valve seat (12) is provided with the oilhole (14) that enters fuel tap (10), is provided with filter screen (40) around oilhole (14).
9. as the described novel porous formula fuel nozzle of one of claim 1～6, it is characterized in that: the axis normal of the direction of spray orifice (23) and fuel tap (10).
10. as the described novel porous formula fuel nozzle of one of claim 1～6, it is characterized in that: be provided with an one-way valve (50) in the ingress of inlet channel (33).
11. novel porous formula fuel nozzle as claimed in claim 1, it is characterized in that: be provided with one-way valve (50) in the ingress of inlet channel (33), the seat surface of valve seat (12) is an inner conical surface of opening to remaining volume (22), the seat surface of valve body (11) is the male cone (strobilus masculinus) of a big end towards remaining volume (22), the lift of valve body (11) is subject to the end face (12a) of valve seat (12), valve seat (12) is provided with the oilhole (14) that enters fuel tap (10), be provided with filter screen (40) around oilhole (14), the axis normal of spray orifice (23) and fuel tap (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114179 CN2779091Y (en) | 2004-12-15 | 2004-12-15 | Multi-hole type fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114179 CN2779091Y (en) | 2004-12-15 | 2004-12-15 | Multi-hole type fuel nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779091Y true CN2779091Y (en) | 2006-05-10 |
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ID=36753179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420114179 Expired - Fee Related CN2779091Y (en) | 2004-12-15 | 2004-12-15 | Multi-hole type fuel nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2779091Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422545C (en) * | 2004-12-15 | 2008-10-01 | 浙江飞亚电子有限公司 | Oil spray nozzle |
-
2004
- 2004-12-15 CN CN 200420114179 patent/CN2779091Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422545C (en) * | 2004-12-15 | 2008-10-01 | 浙江飞亚电子有限公司 | Oil spray nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhejiang FAI Electronics Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060510 Termination date: 20131215 |