CN1279278C - Sealing structure of fuel shooting valve - Google Patents
Sealing structure of fuel shooting valve Download PDFInfo
- Publication number
- CN1279278C CN1279278C CN 02126142 CN02126142A CN1279278C CN 1279278 C CN1279278 C CN 1279278C CN 02126142 CN02126142 CN 02126142 CN 02126142 A CN02126142 A CN 02126142A CN 1279278 C CN1279278 C CN 1279278C
- Authority
- CN
- China
- Prior art keywords
- pressure
- support ring
- chamber
- nozzle
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/003—Valve inserts containing control chamber and valve piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention provided a seal structure of a fuel injection valve manufacturable at a low cost, not requiring excessive component accuracy, improving a sealing function in a pressure lead-in chamber 21 of the fuel injection valve, improving durability and a service life of the fuel injection valve and a seal member 22, and stabilizing the sealing function. In this seal structure of the fuel injection valve, a support ring 31 is provided on a downward side (a low-pressure side) of the seal member 22. The seal member 22 is provided in the high-pressure pressure lead-in chamber 21 between an injector housing 2 and a valve body 6 slidably inserted with a valve piston 5 to seal a portion between the pressure lead-in chamber 21 and the low-pressure side (a gap 28). The support ring 31 is provided on the low-pressure side 28 of the seal member 22.
Description
Technical field
The present invention relates to the seal construction of Fuelinjection nozzle, particularly regularly (set timing) sprays seal construction from the Fuelinjection nozzle of the fuel under high pressure of accumulator (slow depressor) etc.
Background technique
With reference to Figure 16 and Figure 17 traditional Fuelinjection nozzle is described.
Figure 16 is the sectional view of Fuelinjection nozzle 1, and Fuelinjection nozzle 1 has nozzle bearing 2, nozzle body 3, nozzle needle value 4, valve plug 5, valve body 6, back pressure control device 7, link (connecting rod) 8.
On nozzle bearing 2, utilize nozzle nut 9 nozzle body 3 to be installed at its front end, simultaneously, quadrate part is installed link 8 thereon.
Fuel from fuel tank 10 utilizes petrolift 11 to form storage of higher pressures in slow depressor (コ モ Application レ one Le) 12 (accumulators), provides fuel under high pressure from link 8 to Fuelinjection nozzle 1.
That is, from link 8 to nozzle bearing 2 and nozzle body 3 form fuel channels 13, form fuel opposite to each other with the compression zone 4A of nozzle needle value 4 and store chamber 14.And, the part of fuel channel 13 is extended to top among Figure 16 from link 8, and form from the fuel return flow line 15 that back pressure control device 7 parts are drawn, make fuel can be back to fuel tank 10.
On nozzle body 3, its front end forms the spray orifice 16 of any amount, and the front end of nozzle needle value 4 drops on the seat portion 17 that is connected with spray orifice 16, then with spray orifice 16 sealings; Nozzle needle value 4 breaks away from seat portion 17 and rises, and then opens spray orifice 16, but burner oil.
Upper portion at nozzle needle value 4,18 pairs of nozzle needle values 4 of design nozzle springs impose active force in the direction that descends to seat portion 17, the valve plug 5 of design one and extension are upward inserted the sliding eye 2A of nozzle bearing 2 and the sliding eye 6A of valve body 6 slidably with this valve plug 5 on nozzle needle value 4.
Figure 17 is the major component amplification profile diagram of valve body 6 and back pressure control device 7, valve body 6, the center forms pressure control chamber 19 above it, and the front end that makes valve plug 5 from lower side near this pressure control chamber 19.
Import the underpart of chamber 21 at pressure, the Sealing 22 that design is made by resin material, rubber material or other soft materials except that copper material, occluding pressure imports the high pressure side of chamber 21 and the low voltage side (gap 28, the back is stated) between nozzle bearing 2 and the valve body 6.
In addition, the compression area of the top 5A of the valve plug 5 on the pressure control chamber 19 designs greatlyyer than the compression area of the compression zone 4A (Figure 16) of nozzle needle value 4.
As shown in Figure 16, back pressure control device 7 have magnet 25, valve spring 26, armature 27, with the valve ball 24 of these armature 27 one and above-mentioned pressure control chamber 19.
By providing drive signal to magnet 25, the active force of magnet 25 resistance valve springs 26 attracts armature 27, valve ball 24 is left open and close with hole 23 and rise, and can make the pressure of pressure control chamber 19 be discharged into fuel return flow line 15 sides.
Therefore, utilize the pressure of the action control pressure control chamber 19 of valve ball 24,, handle the decline and the rising of nozzle needle value 4 by the back pressure of valve plug 5 control nozzle needle values 4.
On the Fuelinjection nozzle 1 that constitutes like this, fuel under high pressure from slow depressor 12, offer the compression zone 4A that fuel stores the nozzle needle value 4 on the chamber 14 from link 8 by fuel channel 13, simultaneously, import chamber 21 and import the top 5A that side opening 20 offers the valve plug 5 on the pressure control chamber 19 by pressure.
Therefore, nozzle needle value 4 is subjected to the back pressure effect of pressure control chamber 19 by valve plug 5, adds the active force of nozzle springs 18, makes on its seat portion that drops to nozzle body 3 17, with spray orifice 16 sealings.
When providing drive signal to magnet 25 by timing (timing), attract armature 27, valve ball 24 is opened when opening and closing with hole 23, the high pressure of pressure control chamber 19 passes to fuel return flow line 15 by opening and closing with hole 23, be back to fuel tank 10, therefore, the high pressure that acts on the top 5A of the valve plug 5 on the pressure control chamber 19 is released, nozzle needle value 4 utilizes the active force of the high pressure resistance nozzle springs 18 of compression zone 4A to break away from seat portion 17 risings, opens spray orifice 16 burner oils.
If by making magnet 25 demagnetizations, valve ball 24 sealings open and close with hole 23, then the pressure in the pressure control chamber 19 makes nozzle needle value 4 drop to its valve seat position (seat portion 17) by valve plug 5, and sealing spray orifice 16 finishes fuel and sprays.
But, because pressure imports the fuel pressure in the chamber 21, be present in and lead to the entrance part of control from the pressure control chamber 19 of the fuel injection amount of spray orifice 16 and jet pressure, so, identical with jet pressure, make and be subjected to the high pressure effect same on the Sealing 22 with jet pressure.
Yet, as shown in Figure 17, between valve plug 5 and the valve body 6, must have the interval of allowing that the valve plug 5 with nozzle needle value 4 one motions slides vertically.If adopt valve body 6 is pressed into structure in the nozzle bearing 2, then exists valve body 6 point deformation to be arranged and the danger that hinders valve plug 5 to slide in the inboard, so, between nozzle bearing 2 and valve body 6, also to design some interval (gap 28, Figure 17).
Therefore, Sealing 22, because pressure imports the high pressure in the chamber 21, the problem that exists its part to extrude from the gap 28 (low voltage side) between nozzle bearing 2 and the valve body 6.
And if add the bad condition in upper member precision and off-centre etc. or when assembling, 28 directions extrude in the gap may Sealing 22, can not keep the problem of its sealability.
Because the decline of such sealability exists injection timing error and even reactive decline on the back pressure control device 7, even the problem that also thereupon shortens of the life-span of Fuelinjection nozzle 1.
In addition, about this Fuelinjection nozzle, open flat 7-293387 grade the spy and state.
Summary of the invention
The present invention be directed to that above-mentioned all problems propose, purpose is to provide the pressure that can improve Fuelinjection nozzle to import the seal construction of the Fuelinjection nozzle of the sealability in the chamber.
Again, the present invention, purpose is to provide and is expected to improve the durability of Sealing and even the seal construction of the Fuelinjection nozzle in life-span.
Again, the present invention, purpose is to provide and is expected to improve the durability of Fuelinjection nozzle and even the seal construction of the Fuelinjection nozzle in life-span.
Again, the present invention, purpose is to provide and does not require too high member precision, seal construction that therefore can the cheap Fuelinjection nozzle of making.
Again, the present invention, purpose is to provide the seal construction that can make the stable Fuelinjection nozzle of sealability.
According to the present invention, a kind of seal construction of Fuelinjection nozzle is provided, it is at nozzle bearing and the pressure that is inserted with the high pressure between the valve body of valve plug slidably imports and is provided with Sealing in the chamber to seal the seal construction that this pressure imports the Fuelinjection nozzle between chamber and the low voltage side, and it is characterized in that: the low voltage side at described Sealing is provided with support ring; In described support ring, be formed with radial groove in the bottom of described low voltage side, and, be formed with the thickness direction notch that can be communicated with this radial groove.
In the seal construction of above-mentioned Fuelinjection nozzle, described support ring has: the rib portion that imports the outer circumferential face of the described valve body in the chamber along described pressure; Extend and along the lip part of the inwall end difference of described nozzle bearing to diametric(al) with importing at described pressure in the chamber with this rib portion with meeting at right angles; The bottom of the described low voltage side in the described lip part of described support ring is formed with described radial groove, and, be formed with the described thickness direction notch that can be communicated with this radial groove.
In the seal construction of Fuelinjection nozzle of the present invention, because the downside (low voltage side) at Sealing has designed the support ring that supports it, so, can prevent that pressure from importing indoor high pressure and making the Sealing distortion, improve its sealability, can prolong the life-span of Sealing and Fuelinjection nozzle.
Therefore, can with the interval controlling Design in gap between nozzle bearing and the valve body tolerance more coarse than the past, the member precision also needn't be strict as the past, therefore, can provide Fuelinjection nozzle at an easy rate.
Particularly in such scheme, design makes and may import the chamber from pressure and can flow out to low voltage side by this support ring by the fuel that Sealing spills a little, so, can prevent and may import this fuel stays that the chamber spills a little by Sealing between Sealing and support ring from pressure.
Therefore, can eliminate, and cause the damaged and slide part of nipping of support ring, and then make Sealing stop up the problem that connection pressure imports the importing side opening of chamber and pressure control chamber because this fuel that spills makes Sealing separate with support ring.
If adopt above the present invention, because at the low voltage side of Sealing design support ring, and for example form on this support ring that radial groove and thickness direction notch etc. make fuel can flow out to low voltage side, therefore, the sealability of Sealing be can guarantee, its durability and life-span improved.
Description of drawings
The seal construction 30 of the Fuelinjection nozzle of Fig. 1 the present invention's (particularly first scheme) the 1st form of implementation with the same valve body 6 of Figure 17 and the major component amplification profile diagram of back pressure control device 7.
The same formation of Fig. 2, the stereogram of support ring 31.
The same formation of Fig. 3, the amplification profile diagram of the III part of Fig. 1.
The major component amplification profile diagram of the seal construction 35 of the Fuelinjection nozzle of Fig. 4 the present invention's (particularly first scheme) the 2nd form of implementation.
The major component amplification profile diagram of Sealing 22 the when assembling of the seal construction 30 (Fig. 1 to Fig. 3) of Fig. 5 Fuelinjection nozzle is normally carried out and support ring 31 parts.
The Sealing 22 that the assembling of the seal construction 30 (Fig. 1 to Fig. 3) of Fig. 6 Fuelinjection nozzle is undesired when carrying out when unusual () and the major component amplification profile diagram of support ring 31 parts.
The major component amplification profile diagram just often of the seal construction 40 of the Fuelinjection nozzle of Fig. 7 the present invention's (particularly alternative plan) the 3rd form of implementation.
The same formation of Fig. 8, the major component amplification profile diagram when unusual.
The same formation of Fig. 9, the stereogram of being looked from the underside side (low voltage side) of support ring 41.
The worm's eye view of the same formation of Figure 10.
The planimetric map of the same formation of Figure 11.
The profile diagram of the same formation of Figure 12.
The amplification profile diagram of the XIII portion of Figure 13 Figure 12.
The same formation of Figure 14 shows the major component amplification profile diagram of the support ring 45 of the 1st variation.
The same formation of Figure 15 shows the major component amplification profile diagram of the support ring 47 of the 2nd variation.
The sectional view of Figure 16 Fuelinjection nozzle 1.
The same formation of Figure 17, the major component amplification profile diagram of valve body 6 and back pressure control device 7.
Symbol description
1 Fuelinjection nozzle (Figure 16)
2 nozzle bearings
The sliding eye of 2A nozzle bearing 2
The inwall end difference (Fig. 3) of 2B nozzle bearing 2
The pressure of 2C nozzle bearing 2 imports chamber side internal face (Fig. 4)
3 nozzle bodies
4 nozzle needle values
The compression zone (Figure 16) of 4A nozzle needle value 4
5 valve plugs
The top of 5A valve plug 5 (Figure 16, Figure 17)
6 valve bodies
The sliding eye of 6A valve body 6
The outer circumferential face of 6B valve body 6 (Fig. 3)
7 back pressure control devices
8 links
9 nozzle nuts
10 fuel tanks
11 petrolifts
12 slow depressors (accumulator)
13 fuel channels
14 fuel store the chamber
15 fuel return flow lines
16 spray orifices
17 seat portion
18 nozzle springs
19 import side opening
21 pressure import the chamber
22 Sealings
The hole is used in 23 switchings
24 valve balls
25 magnet
26 valve springs
27 armature
28 gaps (low voltage side, at interval)
The seal construction of 30 Fuelinjection nozzles (the 1st form of implementation, Fig. 1)
31 support rings (Fig. 2)
The rib portion of 32 support rings 31
The lip part of 33 support rings 31
The curved face part of 34 support rings 31
The seal construction of 35 Fuelinjection nozzles (the 2nd form of implementation, Fig. 4)
36 support rings
37 gap parts (Fig. 5 (3))
38 fuel storing sections (Fig. 6 (2))
The seal construction of 40 Fuelinjection nozzles (the 3rd form of implementation, Fig. 7)
41 support rings
42 radial grooves
The thickness direction notch of 43 arcs
44 plane linking parts (Figure 13)
45 support rings (the 1st variation, Figure 14)
46 thickness direction through holes
47 support rings (the 2nd variation, Figure 15)
The degree of depth of H1 radial groove 42 (Figure 12)
The incision length that the footpath of H2 thickness direction notch 43 makes progress (Figure 10, Figure 12)
Embodiment
Below with reference to Fig. 1 to Fig. 3 the seal construction 30 of the Fuelinjection nozzle of the present invention's's (first scheme) the 1st form of implementation is described.But, with Figure 16 and the same part employing prosign of Figure 17, no longer to its detailed description.
Fig. 1 is the valve body 6 identical with Figure 17 and the major component amplification profile diagram of back pressure control device 7, shows the seal construction 30 of Fuelinjection nozzle.
Fig. 2 is the stereogram of support ring 31, and Fig. 3 is the III portion amplification profile diagram of Fig. 1.Support ring 31 is by constituting with the bottom: import in the chamber 21 rib portion 32 along the outer circumferential face 6B of valve body 6, meet at right angles to the lip part 33 along the inwall end difference 2B of nozzle bearing 2 of extension radially, be connected the curved face part 34 of rib portion 32 and lip part 33 with this rib portion 32 at pressure.
That is, the outer circumferential face 6B of rib portion 32 and valve body 6 joins, and lip part 33 joins with the inner peripheral surface (inwall end difference 2B) that pressure imports the nozzle bearing 2 in the chamber 21, and with the enhanced leaktightness performance, simultaneously, 28 side pressures do not go out from the gap can to keep Sealing 22.
Metallic material beyond the support ring 31, the most handy iron constitutes, and can adopt to have in order to prevent any material of Sealing 22 to the rigidity of gap 28 directions extrusion.
On the seal construction 30 of the Fuelinjection nozzle that constitutes like this, support ring 31 is supported on the low pressure sidepiece (gap 28 sides) of Sealing 22, have prevention Sealing 22 to the limitation function that gap 28 directions extrude, can keep the sealability of Sealing 22 for a long time, improve durability and life-span.
Therefore, can must be bigger than past with the tolerance design in the gap 28 between nozzle bearing 2 and the valve body 6, simultaneously, the member precision and the assembly precision of Sealing 22, support ring 31, nozzle bearing 2 and valve body 6 etc. needn't be very strict, can make more at an easy rate than the past.
In addition, support ring 31, because 32 form curved face part 34 from lip part 33 to rib portion, so, imported the high pressure compressing of chamber 21 and pass through the Sealing 22 that support ring 31 produces resiliently deformables by pressure, produce elastic force and make the rib portion 32 of support ring 31 be subjected to active force, can further improve sealability towards the direction of the outer circumferential face 6B of valve body 6.
Again, because adopt seal construction 30 as described above, so, owing to can increase the interval in the gap 28 between nozzle bearing 2 and the valve body 6, even therefore how much deform owing to external force makes nozzle bearing 2, the influence of its distortion also is difficult to affact on the valve body 6, can keep between valve body 6 and the valve plug 5 the interval as design like that, do not have the danger of the slip of obstruction valve plug 5.
Fig. 4 is the major component amplification profile diagram of seal construction 35 of Fuelinjection nozzle of the present invention's's (first scheme) the 2nd form of implementation, in sealing structure 35, replaces support rings 31 (Fig. 2) at the low voltage side configuration support ring 36 of Sealing 22.
Support ring 36 also is the rib portion 32 at the outer circumferential side pressure of the nozzle bearing 2 (import chamber side internal face 2C) design support ring 31, with its be designed in the footpath of Sealing 22 upwards can balanced supporting sealing member 22 shape.
On the seal construction 35 of the Fuelinjection nozzle that constitutes like this, also as the seal construction 30 of the Fuelinjection nozzle of Fig. 1 to Fig. 3, can utilize the support of support ring 36 to prevent Sealing 22 distortion and improve sealability, simultaneously, utilize more balanced support performance further to strengthen to prevent the function of being out of shape.
Again, because interior all sides and outer circumferential side at support ring 36 form rib portion 32 respectively, so, the high pressure compressing that imports chamber 21 owing to be stressed produces the Sealing 22 of resiliently deformable by support ring 36, produce elastic force and make the rib portion 32 of the both sides of support ring 36 be subjected to respectively importing the active force of chamber side internal face 2C, can further improve sealability towards the direction of the outer circumferential face 6B of valve body 6 and towards the pressure of nozzle bearing 2.
Below, Fig. 5, be Fuelinjection nozzle seal construction 30 (Fig. 1 to Fig. 3) assembling just often Sealing 22 and the major component amplification profile diagram of support ring 31 parts, such shown in Fig. 5 (1), on the inwall end difference 2B of nozzle bearing 2, support ring 31 is set, and Sealing 22 is located at its upside, under this state, therefrom the side inserts valve body 6 in the heart.
Like that, by the insertion of valve body 6, utilize the rubbing action between valve body 6 and Sealing 22 and the support ring 31 shown in Fig. 5 (2), support ring 31 produces plastic deformation, makes the circumference part of its lip part 33 go up perk from inwall end difference 2B.
Such shown in Fig. 5 (3), under the operating condition of normal Fuelinjection nozzle 1, pressure imports in the chamber 21 and is full of fuel under high pressure, utilize its pressure, Sealing 22 and support ring 31 are pressed to the outer circumferential face 6B side of valve body 6 and the inwall end difference 2B and the pressure importing chamber side internal face 2C of nozzle bearing 2, remain on the state that is provided with that to bring into play its sealability.
Under this is provided with state, the rib portion 32 of support ring 31 and the outer circumferential face 6B of valve body 6 join, lip part 33 joins with the inwall end difference 2B of nozzle bearing 2, simultaneously, import at the pressure of nozzle bearing 2 between the end of chamber side internal face 2C and lip part 33 and leave some gap parts 37, can not hinder the normal operation of Fuelinjection nozzle 1.
On the other hand, Fig. 6 is that the seal construction 30 (Fig. 1 to Fig. 3) of Fuelinjection nozzle is assembled when undesired the Sealing 22 of when unusual () and the major component amplification profile diagram of support ring 31 parts, when support ring 31 produces plastic deformation like that shown in Fig. 5 (2) after, such shown in Fig. 6 (1), when the high pressure in pressure imports chamber 21 made Sealing 22 and support ring 31 distortion, final sometimes distortion increased the diameter of support ring 31.
Under the state that this diameter prolongs, (be such shown in Fig. 5 (3), pressure at nozzle bearing 2 imports between the end of chamber side internal face 2C and lip part 33, when the state that gap part 37 does not also stay) moving Fuelinjection nozzle 1, such shown in Fig. 6 (2), support ring 31 just in time embeds the outer circumferential face 6B of valve body 6 closely and the pressure of nozzle bearing 2 imports between the side internal face 2C of chamber, at two places of rib portion 32 and lip part 33, make support ring 31 self have sealability.
Therefore, cross Sealing 22 from pressure importing chamber 21 and be trapped in sometimes between Sealing 22 and the support ring 31, form fuel storing section 38 betwixt to the fuel that the low voltage side direction spills a little.
And, cross the fuel that Sealing 22 spills because the effect of pump increases fuel storing section 38, the result is such shown in Fig. 6 (2), there is such problem, promptly, make Sealing 22 break away from support ring 31 and rise, situation worst is to block importing side opening 20 (Fig. 1) to make back pressure control device 7, i.e. the operation of Fuelinjection nozzle 1 stops.
Certainly, support ring 31 self is subjected to the effect of excessive pressure (stress), also may be owing to metal fatigue damage, and its damaged fragment might enter the unfavorable condition that slide part causes secondary.
In addition, such shown in Fig. 5 (3), import at the pressure of nozzle bearing 2 under the normal state of some gap parts 37 of formation between the end of chamber side internal face 2C and the lip part 33 of support ring 31, support ring 31 self is not to have sealability as above-mentioned when unusual, fuel can be crossed support ring 31 from this gap part 37 and slowly drain to low voltage side (gap 28 sides), therefore, do not form the above-mentioned fuel storing section 38 among Fig. 6 (2), do not influence the normal operation of Fuelinjection nozzle 1.
Therefore, the present invention's (alternative plan) is in order to eliminate such problem fully, design does not form fuel storing section 38, that is, make and to import the fuel that chamber 21 spills a little by Sealing 22 from pressure and can flow to low voltage side (gap 28), the support ring that fuel pressure is discharged to low voltage side.
Promptly, Fig. 7 is the major component amplification profile diagram just often of seal construction 40 of Fuelinjection nozzle of the present invention's's (alternative plan) the 3rd form of implementation, Fig. 8 is the major component amplification profile diagram of same structure when unusual, support ring 41 with the seal construction 40 of Fuelinjection nozzle is designed to make the fuel that spills to flow to the shape of low voltage side at leisure.
Fig. 9 is the stereogram of being looked from the underside side of support ring 41 (low voltage side), and Figure 10 is the worm's eye view of same structure, and Figure 11 is the planimetric map of same structure, and Figure 12 is the profile diagram of same structure, and Figure 13 is the amplification profile diagram at the XIII place among Figure 12.Support ring 41 has rib portion 32, lip part 33 and the curved face part 34 same with support ring 31 (Fig. 2), simultaneously, from lip part 33 to curved face part 34, form radial groove 42 in local (in diagram with the intervals of 90 degree at 4 places) arbitrarily, and, at the thickness direction notch 43 of the outer edge side end formation arc that is positioned at this radial groove 42.
Particularly as shown in amplifying among Figure 13 like that, the bottom surface from the bottom surface of lip part 33 to curved face part 34 forms radial groove 42, keeps the plane linking part 44 that the outer circumferential face 6B with valve body 6 joins in the upper end portion of rib portion 32.
On the seal construction 40 of the Fuelinjection nozzle that constitutes like this, as shown in Figure 7, on high-tension side pressure imports the gap 28 of chamber 21 and low voltage side, utilize Sealing 22 and support ring 41 to seal mutually, but can not prevent fully that fuel that pressure imports chamber 21 from crossing Sealing 22 and going out to support ring 41 side leakages a little.
But, import the fuel that chamber 21 spills from pressure, can flow out to gap 28 sides by gap part 37, thickness direction notch 43 and radial groove 42, can between Sealing 22 and support ring 41, not form above-mentioned fuel storing section 38 (Fig. 6 (2)).
For example, as shown in Figure 8, even support ring 41 similarly is in to the unusual assembled state that radially extends the ground distortion with Fig. 6 (2), but cross the fuel that Sealing 22 leaks into support ring 41 sides, can utilize thickness direction notch 43 and radial groove 42 to flow out to gap 28 sides, can between Sealing 22 and support ring 41, not form above-mentioned fuel storing section 38.
Therefore, utilize Sealing 22 and support ring 41, the salable gap 28 that does not drain to low voltage side from the fuel of pressure importing chamber 21 basically that makes, but because the sealing performance can not be very perfect, so, in the present invention, by on support ring 41, forming thickness direction notch 43 and radial groove 42, constituting makes support ring 41 have excretory function, low voltage side can initiatively slowly lead all fuel that spill, so, can stablize and bring into play the sealability of Sealing 22 and the support function of support ring 41 muchly.
In addition, the groove or the otch that form on support ring 41 are not limited to illustrated embodiment, can be shapes arbitrarily.
For example Figure 14 is the major component amplification profile diagram that shows the support ring 45 of the 1st variation, forms the thickness direction through hole 46 that is communicated with radial groove 42.The radial dimension of this thickness direction through hole 46 also is designed to necessary inferior limit.
Figure 15 is the major component amplification profile diagram that shows the support ring 47 of the 2nd variation, forms rib portion 32 in interior all sides and outer circumferential side respectively, simultaneously, forms the thickness direction through hole 46 that is communicated with radial groove 42.
On these support rings 45,47, the fuel that imports inside all side seepages between the outer circumferential side end of chamber side internal face 2C and Sealing 22 from the pressure of nozzle bearing 2 can flow out to radial groove 42 sides from thickness direction through hole 46.
Claims (2)
1, a kind of seal construction of Fuelinjection nozzle, it is at nozzle bearing and the pressure that is inserted with the high pressure between the valve body of valve plug slidably imports and is provided with Sealing in the chamber to seal the seal construction that this pressure imports the Fuelinjection nozzle between chamber and the low voltage side, it is characterized in that:
Low voltage side at described Sealing is provided with support ring;
In described support ring, be formed with radial groove in the bottom of described low voltage side, and, be formed with the thickness direction notch that can be communicated with this radial groove.
2, the seal construction of Fuelinjection nozzle according to claim 1 is characterized in that:
Described support ring has:
Import the rib portion of the outer circumferential face of the described valve body in the chamber along described pressure; With
Import in the chamber with this rib portion at described pressure and to extend and along the lip part of the inwall end difference of described nozzle bearing to diametric(al) with meeting at right angles;
The bottom of the described low voltage side in the described lip part of described support ring is formed with described radial groove, and, be formed with the described thickness direction notch that can be communicated with this radial groove.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001216043A JP3567374B2 (en) | 2001-07-16 | 2001-07-16 | Fuel injection valve seal structure |
| JP216043/01 | 2001-07-16 | ||
| JP216043/2001 | 2001-07-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1397727A CN1397727A (en) | 2003-02-19 |
| CN1279278C true CN1279278C (en) | 2006-10-11 |
Family
ID=19050571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02126142 Expired - Fee Related CN1279278C (en) | 2001-07-16 | 2002-07-16 | Sealing structure of fuel shooting valve |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3567374B2 (en) |
| KR (1) | KR100484020B1 (en) |
| CN (1) | CN1279278C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005248847A (en) * | 2004-03-04 | 2005-09-15 | Bosch Automotive Systems Corp | Sealing structure for fuel passage and fuel injection valve equipped with the sealing structure |
| JP2005248846A (en) * | 2004-03-04 | 2005-09-15 | Bosch Automotive Systems Corp | Sealing structure for fuel passage and fuel injection valve equipped with the sealing structure |
| JP4087817B2 (en) | 2004-06-03 | 2008-05-21 | ボッシュ株式会社 | Fuel injection valve |
| DE102004060983B4 (en) * | 2004-12-17 | 2017-02-02 | Robert Bosch Gmbh | Fuel injector |
| DE102005048541A1 (en) * | 2005-10-11 | 2007-04-12 | Robert Bosch Gmbh | injector |
| JP4458541B2 (en) * | 2005-12-16 | 2010-04-28 | ボッシュ株式会社 | Backup ring manufacturing method, backup ring, and fuel injection valve seal structure |
| JP4699400B2 (en) * | 2007-02-13 | 2011-06-08 | ボッシュ株式会社 | Fuel injection valve seal structure and fuel injection valve |
| KR101162353B1 (en) | 2010-06-14 | 2012-07-04 | 평화오일씰공업주식회사 | Washer for gasoline direct injection engine |
| JP5270714B2 (en) * | 2011-04-27 | 2013-08-21 | トヨタ自動車株式会社 | Damping insulator for fuel injection valve |
| CN102852684B (en) * | 2012-10-12 | 2014-09-17 | 福建省莆田市中涵机动力有限公司 | Pressure balancing type external sealing plane control valve of common-rail oil sprayer |
| CN102877994B (en) * | 2012-10-12 | 2014-12-24 | 福建省莆田市中涵机动力有限公司 | Pressure balance type inner sealing planar control valve of common-rail oil atomizer |
| CN103899462B (en) * | 2012-12-31 | 2016-05-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Hermetically-sealed construction in a kind of fuel feed system injector |
| CN104074652B (en) * | 2014-06-30 | 2016-09-07 | 福建省莆田市中涵机动力有限公司 | The split type control valve of common-rail injector |
| CN106368874A (en) * | 2016-09-12 | 2017-02-01 | 上海中船三井造船柴油机有限公司 | Oil sprayer of low-speed diesel engine |
| EP3309384B1 (en) * | 2016-10-12 | 2020-08-26 | Vitesco Technologies GmbH | Anti-reflection device for an injection valve and injection valve |
| CN106704067B (en) * | 2017-01-25 | 2019-05-14 | 中国第一汽车股份有限公司 | The weak anti-oil return fuel injection device of leakage |
| WO2019109825A1 (en) * | 2017-12-07 | 2019-06-13 | 天津盛欧美发动机技术有限公司 | Common-rail fuel injector for diesel engine |
| JP6962208B2 (en) * | 2018-01-17 | 2021-11-05 | トヨタ自動車株式会社 | Sealed structure |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62155263U (en) * | 1986-03-24 | 1987-10-02 | ||
| JPS63185964U (en) * | 1987-05-25 | 1988-11-29 | ||
| JPH0535245Y2 (en) * | 1987-09-24 | 1993-09-07 | ||
| JPH0365032A (en) * | 1989-08-02 | 1991-03-20 | Central Res Inst Of Electric Power Ind | Cogeneration system |
| JP2597071Y2 (en) * | 1992-09-30 | 1999-06-28 | エヌオーケー株式会社 | gasket |
| US5342066A (en) * | 1992-10-26 | 1994-08-30 | Fmc Corporation | Non-extrusion device for split annular casing/tubing hanger compression seals |
| JP3532714B2 (en) * | 1996-06-21 | 2004-05-31 | Ｎｏｋ株式会社 | Sealing device |
| JP2001146969A (en) * | 1999-11-24 | 2001-05-29 | Nok Corp | Seal device |
-
2001
- 2001-07-16 JP JP2001216043A patent/JP3567374B2/en not_active Expired - Lifetime
-
2002
- 2002-07-15 KR KR10-2002-0041102A patent/KR100484020B1/en not_active IP Right Cessation
- 2002-07-16 CN CN 02126142 patent/CN1279278C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030007184A (en) | 2003-01-23 |
| JP3567374B2 (en) | 2004-09-22 |
| CN1397727A (en) | 2003-02-19 |
| JP2003028021A (en) | 2003-01-29 |
| KR100484020B1 (en) | 2005-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1279278C (en) | Sealing structure of fuel shooting valve | |
| CN1195953C (en) | Pipe joint | |
| CN101048094A (en) | System with capsule having sealing means | |
| CN1353247A (en) | Vortex Compressor | |
| CN1782448A (en) | Ball joint device | |
| CN1701189A (en) | Liquid sealing type anti-vibration apparatus | |
| CN1605003A (en) | Valve | |
| CN1448645A (en) | Hydraulic tensioner lifter | |
| CN1789694A (en) | Solenoid valve, flow-metering valve, high-pressure fuel pump and fuel injection pump | |
| US20150013644A1 (en) | Decoupling element for a fuel injection device | |
| CN1603122A (en) | Ink cartridge and inkjet printer | |
| CN1294664A (en) | Seal structure | |
| CN1308666C (en) | Pressure sensor | |
| CN1610799A (en) | Pressure release valve | |
| CN1390286A (en) | Connector | |
| CN1930420A (en) | Gas burner | |
| CN107110098A (en) | Fuel injection device | |
| CN101069035A (en) | Seal structure for connecting section in fluidic device | |
| CN1886591A (en) | Combustion gas seal for fuel injection valve | |
| CN102282358A (en) | Dual-phase spring assembly for use with fuel injector system | |
| CN1940287A (en) | Fluid pump having plunger and method of monoblock casting for housing of the same | |
| CN1661258A (en) | Length adjustable gas spring and inflating method | |
| CN1210493C (en) | Box element mounting structure | |
| CN1455845A (en) | Accumulator distribution type fuel injection pump | |
| CN1270077C (en) | Fuel shooting valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061011 Termination date: 20100716 |