CN110234865A - The high pressure accumulator of fuel high pressure spraying system - Google Patents
The high pressure accumulator of fuel high pressure spraying system Download PDFInfo
- Publication number
- CN110234865A CN110234865A CN201880007704.8A CN201880007704A CN110234865A CN 110234865 A CN110234865 A CN 110234865A CN 201880007704 A CN201880007704 A CN 201880007704A CN 110234865 A CN110234865 A CN 110234865A
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- China
- Prior art keywords
- chamber
- insertion piece
- high pressure
- connector
- hole
- Prior art date
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
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- 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
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of high pressure accumulators for high-pressure injection system, the high pressure accumulator is by limit high-pressure chamber (12, cylinder (11) and connector (13 12a), 13a) constitute, the connector is equipped with the exit passageway (131,131a) led in the room (12,12a), and it is respectively equipped with throttle, to weaken by the pressure wave of the injector generation in downstream connection.The connector (13,13a) is respectively provided with channel (131,131a) in exit, the channel has chamber (1312,1312a), and the chamber, which receives, is equipped with throttle (22,22a) insertion piece (2,2a).The insertion piece (2,2a) is fixed in the chamber (1312,1312a) with passing through the self-tightening process force closure of high pressure accumulator.
Description
Technical field
The present invention relates to a kind of high pressure accumulators for high-pressure injection system, and the high pressure accumulator is by limit high-pressure chamber
Cylindrical body and connector constitute, the connector is equipped with the exit passageway of high-pressure fluid for leading in chamber and is equipped with
Throttle, to weaken by the pressure wave of the injector generation in downstream connection.
Background technique
The known high pressure accumulator in this high-pressure injection system shown in fig. 7.The rail 100, also referred to as " high pressure is deposited
Reservoir " is made up of the cylindrical body 111 made of thick forged steel, which surrounds high-pressure chamber 112.The ontology of the rail
With the outlet connector 113 for connecting pressure duct, the pressure duct is connected respectively on an injector.Connector
113 holes 114 being passed in chamber 112 are run through.There is the throttle of drilling at the interconnecting piece with chamber on the base portion in hole
115.The throttle 115 decays due to being associated with the closing movement of the injector of each connector and in the high-pressure fluid of the rail
The pressure wave of middle generation.The throttle 115 that through hole generates is sometimes referred to as " nozzle ".
The pressure wave although this solution can decay, the solution have the shortcomings that certain amount, especially should
The validity of solution is lower, because the hole for constituting the throttle cannot manufacture into established geometry.
The solution can not abide by stringent tolerance.In addition, the embodiment is in the logical of the channel into chamber
The form for entering the hole on facial planes generates such seamed edge, which generates strong dispersion in wave attenuation.In order to avoid this
Situation, the seamed edge for being passed through portion of device to hole carries out electrochemical treatments and is necessary, to make the seamed edge rounding and to remove possibility
Burr or the part that is projected into chamber, this is difficult and therefore expensive process.
According to the prior art, there is also the alternatives of the nozzle in insertion nozzle shape for getting into the rail
Case.This nozzle is inserted into a conventional manner, that is, passes through the geometric gap (the sealed clamping of shape) and use of control cavity plate
Pressing, wherein control insertion force.The nozzle being inserted into is only used for no self-tightening or the rail with small self-tightening, because self-tightening causes
Residual deformation, the residual deformation jeopardize the control to the sealed clamping of shape.In this case, it needs after self-tightening to insertion
Diameter carries out expensive additional last handling process.Therefore, which has disadvantages that.
Summary of the invention
Task of the invention lies in develop a kind of high pressure accumulator for high-pressure injection system, the high pressure accumulator
Can effectively decay it is in-orbit in due to the pressure wave that the injection valve of the injector in downstream connection is closed and is generated, while can
Simply manufacture and generate between the nozzle of identical rail or different rails the weak dispersion of decaying.
For this purpose, the present invention relates to a kind of high pressure accumulator of high-pressure injection system for internal combustion engine, which is deposited
Reservoir is made of the cylindrical body of limit high-pressure chamber and connector.One or more connectors are equipped with one or more for leading to
The exit passageway of high-pressure fluid in chamber.It is disposed with throttle, in exit passageway to weaken the injection in downstream connection
The pressure wave of device.Connector is respectively provided with channel in exit, which has chamber, which, which receives, is equipped with inserting for throttle
Enter part.The insertion piece is arranged in described with passing through self-tightening process (Autofrettage-Prozess) force closure of high pressure accumulator
In chamber.
High pressure accumulator according to the present invention can simply manufacture and also have the throttle with closed tolerance.With letter
The mode of list and realization insertion piece being fixedly connected in high pressure accumulator in the case where not needing new or other devices,
It is realized because this is fixedly connected by the self-tightening of rail.The self-tightening of rail is known manufacturing process, to ensure the fatigue properties of rail.
This does not extend manufacture cycle.
Throttle made of in-orbit outside can realize letter by the drilling process and finishing passes of in-orbit outside
Single manufacture, may be not present the danger that foreign matter is introduced in rail and avoids any Burr Problem in the rail, on the contrary, this
Smooth seamed edge or radius can be manufactured.
Therefore, logical inlet of the channel of insertion piece on high-pressure chamber side has radius.
According to another advantageous feature, the channel in insertion piece is stepped hole, the stepped hole by it is a series of have gradually subtract
The hole of small diameter is constituted, this some holes is by taper function spaced-apart.Therefore stair-stepping throttle is generated, which can
Preferably optimize insertion piece in terms of vibration damping/system effectiveness loss compromise.
A series of holes with the diameter being gradually reduced are only the examples of complex geometric shapes, which can pass through
It is realized with the nozzle of rail separate machined.It aims at, obtains the asymmetry of the pressure loss, i.e., towards the direction for being conducive to injection
The pressure loss is less, and the pressure loss towards the direction for only helping to vibration damping is more.
According to another feature, the channel with throttle has conical entrance, which, which forms, is used for self-tightening process
Seal receptacle.
According to another feature, connector also has conical entrance herein, to generate the leakproofness for self-tightening.
According to a feature also particularly, the chamber is cylindrical and forms shoulder with hole, which generates close
Seal seamed edge.Insertion piece have outer surface, the outer surface have major diameter cylindrical section, so as to assembly when band with a gap into
Enter into cylindrical chamber.In addition, insertion piece has the part of minor diameter, the part is freely prominent in the hole of connector,
In, the two parts of insertion piece are connected by conical section, and conical section is determined as the seamed edge for abutting to connector.
According to another feature, connector has taper chamber, which continues, and the hole has than taper
The smaller cross section in cross section of the small base portion of chamber.Also, the insertion piece with throttle has bullet, bullet tool
There is length more smaller than the length of taper chamber, and the cross section of the small base portion of the bullet is greater than the small base portion of the chamber
Cross section, wherein the taper of the chamber and the taper of bullet are identical.
Advantageously, in the case where taper chamber, the surface of taper chamber and/or the surface of vertebra body have unevenly
Property, unevenness and protuberance or recessed geometry, the adhesive ability contacted by self-tightening for improving two faces and
It is also used for the better sealing in self-tightening.
According to another feature, the cross section for entering the part in hole of insertion piece is less than the cross section in the hole, so as to
It is not contacted with the hole after rail and insertion piece self-tightening.
The joint face between insertion piece and connector is reduced by unique contact surface in this way, the contact surface can
To be tensioned by self-tightening.
According to another feature, the length of the part of insertion piece is less than the length in hole so that throttle to be passed through mouth obviously remote
Mouth is passed through into chamber from the hole.Therefore, the hole that the outlet in the hole of insertion piece is apparently higher than in chamber be passed through mouth and
Influence the pressure loss.
If high pressure accumulator has multiple connectors, the cloth preferably in the connector for the injector for leading to downstream connection
It is equipped with the insertion piece with throttle according to one of embodiment stated above.
Task of the invention lies also in manufacture high pressure accumulator as defined above, wherein the method is characterized in that:
Chamber is manufactured in the exit passageway of each connector by milling,
Manufacture is throttled the perforative insertion piece in portion, wherein the diameter of the outer diameter matching chamber of insertion piece,
Insertion piece is mounted in each chamber,
The leakproofness of the leakproofness of insertion piece and the entrance of connector is generated, and
The rail assembled in this way is set to be subjected to autofrettage pressure, to handle the inner surface of rail and to lock insertion piece power
It is arranged in the chamber of connector with closing.
As above illustrated by, the manufacturing method of rail is particularly simple and at the same time provide the advantage that can
Generate the accurate and effective throttle for pressure wave of decaying (compression shock).
Detailed description of the invention
The present invention is explained in detail below with respect to embodiment shown in the accompanying drawings, is shown in the accompanying drawings:
The axial sectional view of the part of the high pressure accumulator of Fig. 1 high-pressure injection system,
Axial sectional view of the Fig. 2 for the insertion piece with throttle of the high pressure accumulator of Fig. 1,
The schematical semi-section view of the embodiment of the high pressure accumulator of Fig. 3 Fig. 1,
The axial sectional view of another embodiment of the high pressure accumulator of Fig. 4 spraying system according to the present invention,
Axial cross section of the Fig. 5 for the insertion piece with throttle of the high pressure accumulator of Fig. 4,
Fig. 6 explains the semi-section view in the connector for the high pressure accumulator that the insertion piece with throttle is assembled to Fig. 4
Figure,
The viewgraph of cross-section of the high pressure accumulator in other words of rail known to Fig. 7.
Specific embodiment
According to Fig. 1, the rail for the high-pressure injection equipment that the present invention relates to a kind of in internal combustion engine high pressure accumulator 1 in other words.
The common part of the rail is shown with axial cross section.Other components of spraying equipment are not shown.
High pressure accumulator 1 is the cylindrical body 11 of the heavy wall made of forged steel, which surrounds high-pressure chamber 12, the height
Chamber is pressed to supply high pressure fuel by high-pressure pump, so that high pressure fuel to be assigned on injection valve (injector), which passes through
The central control unit of engine controls.
The closing and open movement of injector generate compression and decompression wave (" compression shock "), the compression and decompression wave from height
Pressure fluid is transmitted in the pipeline for connecting injector with rail 1, and is therefore reached in rail.
Cylindrical body 11 has the connector 13 for connection, and the connector passes through channel 131 respectively and is connected to high pressure chest
It is connected on the injector of the pressure duct at room 12 and by pressure duct.Connector has screw thread 132 in outside, so as to
Screw the connector of pressure duct.
The example of Fig. 1 is limited to show the regular section of the rail, and there are two connector 13, a connector is part tool
Empty and another connector has the insertion piece 2 with throttle.Rail 1 also has as having supplied injector
Multiple connectors 13 and high pressure fuel outlet.The preferred structure having the same of all these connectors 13 and following illustrate to limit
In one of these connectors.
Connector 13 on the right side of Fig. 1 shows its channel 131 without the insertion piece with throttle 2；On a left side
The connector 13 of side is equipped with the insertion piece with throttle 2.
With the separately shown insertion piece with throttle 2 in section in Fig. 2.
According to Fig. 1, channel 131 in connector 13 according to lead to high-pressure chamber 12 extension orientation by 1311 structure of approach cone
At and then the approach cone is cylindrical chamber/hole 1312, which has the diameter in the hole 1314 than being located at downstream
Bigger diameter, to form sealing seamed edge 1313.Channel 131 receives the insertion piece with throttle 2.
According to fig. 2, insertion piece with throttle 2 has by the perforative cylindrical body 21 of stepped hole 22, the stepped hole by
A series of holes with the diameter 222,224,226 being gradually reduced are constituted, this some holes is separated by cone connection 223,225.
The entrance of insertion piece 2 has the conical by its shape 221 for forming seal receptacle, and leads to the logical of the last hole 226 in the chamber of rail
Entrance has rounded edge radius 227 in other words.
Stepped hole 22 forms the throttle being determined as weakening pressure wave (compression and decompression), and the pressure wave passes through spray
The closing and open movement of emitter are directed in high-pressure fluid.
The ontology 21 with its outer surface 23 of insertion piece 2 leads to a part 231 with big cross section, the part
The linking of cone connection 232 is crossed on the part 233 with small cross section, which constitutes bearing surface, so as to even
1313 collective effect of seamed edge in the channel 131 of fitting.The outer surface 23 of part 233 with small cross section is at radius 234
It terminates.The major diameter of the part 231 of insertion piece 2 is slightly less than the diameter in the hole 1312 of connector 13.The minor diameter of part 233 is obvious
Less than the diameter in the hole 1314 for the connector 13 for being located at 1312 downstream of hole, so that being equipped with the insertion piece 2 of throttle to assemble energy
It is enough be mounted in the channel 131 of connector 13 with a wet finger and the part 233 with small cross section not with the wall in channel 131 and
Especially the hole 1314 of connector contacts.Stepped hole 1312/1314 can be realized, although it is not required hydraulic function,
But still reduce the diameter in the hole in the plane that stepped hole intersects with high-pressure chamber 12.The length of the part 233 of insertion piece 2 is less than
The length in hole 1314, so that the mouth that is passed through of throttle 226 is significantly away from hole 1314 and is passed through mouth 1315 into chamber 12.
The explanation in terms of the length in the length of the part of insertion piece and the hole of connector can also apply to second
Embodiment illustrates the second embodiment below.
As illustrated by below, the card resistance force closure of insertion piece in other words of insertion piece 2 is realized by self-tightening
Arrangement.
According to the semi-section of Fig. 3, when being equipped with the insertion piece all with throttle 2, rail 1 is by self-tightening.For this purpose, each
The closure member of the unshowned conical seat 221 against insertion piece 2 is applied on connector 13.Supporting part is formed in this way.
The leakproofness (region A) of insertion piece 2 is generated along the tensile force F that axis xx applies during self-tightening and passes through the cone of insertion piece 2
Contact between shape surface 232 and the seamed edge 1313 of connector 13 is close between generation insertion piece 2 and channel 131 in the B of region
Feng Xing.
The self-tightening high pressure for being exposed to the fluid being introduced into the rail of limit hole 131 and insertion piece 2 in this way
Face.
The face of the exposure is (along the direction of high pressure fuel outflow) face and the connector for being located at the chamber 12 before insertion piece 2
The face in 13 channel 131, inner surface including insertion piece 2 and positioned at tapered shoulder part 232 with by the hole 1312 of connector 13 and hole
The outer surface of insertion piece between 1314 seamed edges 1313 separated before contact portion.In other words, the face is relative to insertion piece 2
The high-pressure fluid of self-tightening is not exposed to hole 1312, but by the power generated by the high pressure.Therefore, very high to press certainly
Power is plasticized the internal layer in the face of the exposure of rail 1 and insertion piece 2, the internal layer deformation, to be pressed against the hole of connector 13
1312 are extruded.After applying the very high autofrettage pressure, connector 13 is tightened towards each insertion piece 2, the insertion
Thus part is retracted.
Fig. 4 shows another embodiment of rail 1a according to the present invention, which is also limited to tool, and there are two connectors
The regular section of the rail of 13a, a connector are that empty and another connector has the insertion piece with throttle 2a.Institute
There is this connector 13a structure preferably having the same, so that being limited to one of described connector to the explanation of the connector.
With the separately shown insertion piece with throttle 2a in section in Fig. 5.
According to Fig. 4 and lead to the orientation of high-pressure chamber 12a extension, the channel 131a in connector 13a is by approach cone 1311a
It constitutes, and then the approach cone is taper chamber 1312a, and the small base portion of the taper chamber has the hole 1314a than being located at downstream
The bigger diameter of diameter, to form seamed edge 1313a.Taper chamber 1312a constitutes " Mohs cone " or equivalent cone type
Insertion chamber.Channel 131a receives the insertion piece with throttle 2a by insertion, which has complementary shape.
According to Fig. 5, the insertion piece with throttle 2a has ontology 21a, which is run through by stepped hole 22a, the rank
Terraced hole is made of a series of holes with the diameter 222a, 224a, 226a that are gradually reduced, this some holes by cone connection 223a,
225a is separated.The entrance 221a of insertion piece 2a has conical by its shape, which forms seal receptacle, and last hole
226a leads in the chamber 12a of rail 1a and is passed through mouth with rounded edge or radius 227a.Stepped hole 22a forms throttling
Portion, the throttle are determined as weakening the pressure wave importeding into high-pressure fluid.
The outer surface 23a of insertion piece 2a has conical section 231a, which has major diameter, the conical section
Small base portion is connected by cone connection 232a onto the cylindrical section 233a with minor diameter.Outer surface 23a is in radius
It is terminated at 234a.Conical section 231a has taper identical with the taper of taper chamber 1312a of connector 13, and has
Such cross section, the cross section can be received in taper chamber 1312a by insertion, so that corresponding face is directly pasted
It leans on.
The cross section that there is cylindrical section 233a the cross section of the hole 1314a than connector 13a may be significantly smaller.
According to the semi-section of Fig. 6, when rail 1a is equipped with the insertion piece with throttle 2a, rail 1a is by such as scheming
Self-tightening as first embodiment shown in 1-3 is illustrated.
For this purpose, the conical seat 221a on each connector 13a against insertion piece 2a is applied with unshowned closure member, with
Just leakproofness is generated relative to the outside of hole 22a and generate leakproofness between the tapered surface of part 1312a and 231a.
Here, tensile force F is applied on unshowned ball, which is supported and forms constricted zone C.Power is passed to
On conical contact region between the tapered surface of the chamber 1312a of the conical section 231a and connector 13a of insertion piece 2a.
The face of the self-tightening high pressure for being exposed to the fluid importeding into rail of limit hole 131a and insertion piece 2a in this way.
The face of the exposure is (along the direction of high pressure fuel outflow) face and the connection for being located at the chamber 12a before insertion piece 2a
The face of the channel 131a of part 13a, the inner surface including insertion piece 2a and the tapered surface 231a and taper chamber positioned at insertion piece
The outer surface of insertion piece between the face of 1312a before contact portion.The cross section of the small base portion of conical section 231a is greater than taper
The cross section of the small base portion of chamber 1312a, the taper chamber are connected onto tapered surface 1313a, which constitutes shoulder, so that
Insertion piece 2a can be clamped in combination by being inserted into self-tightening, and without reclining against shoulder 1313a, this can interfere or limit slotting
Enter.
Can determine: the tapered surface of part 1312a or 231a can have groove, and the groove enhances close during self-tightening
Residual axial force between two part/faces of envelope property and raising.
The face in contacting is in insertion piece 2a and hole 1312a and is not exposed to the high-pressure fluid of self-tightening, but is generated
Power.Very high autofrettage pressure is plasticized the internal layer in the face of the exposure of rail 1a and insertion piece 2a, the internal layer deformation, with
Just it is extruded against the hole 1312a of connector 13a.After applying the very high autofrettage pressure, connector 13a is towards each
Thus insertion piece 2a tightening, the insertion piece are retracted.
Rail 1, it is the minimum hardness of 300HB that the forged steel of 1a, which has the order of magnitude, which depends on the hard of pipeline head
Degree and can be with the consistent characteristic of desired result of self-tightening.
Insertion piece 2, the material of 2a has positioned at 300 to the hardness between 450HV, enough to have during self-tightening
Enough residual elasticities are plasticized and keep at the same time, to have enough residual pressures between insertion piece 2,2a and rail 1
Power.
Method according to the present invention for manufacturing rail 1,1a is:
By insertion piece 2,2a band is placed in connector 13 without applying big power with a gap, in 13a,
The component generated in this way is clamped, to have pressure difference between insertion piece 2, the internal diameter and outer diameter of 2a,
With
Generate the plastic deformation of insertion piece 2,2a and rail 1,1a.
The remaining contact being plastically deformed between the insertion piece for ensuring that there is throttle 2,2a and rail 1,1a.
The material property with the insertion piece of throttle is selected, for ensuring enough residual forces, which will be inserted into
Part 2,2a is remained in position during the high pressure accumulator 1,1a operation of spraying system.
The reference signs list of most important element, without suffix " a " in addition to special circumstances
1 rail
11 ontologies
12 high-pressure chamber
13 connectors
131 channels
1311 approach cones
1312 cylindrical chambers
1312a taper chamber
1313 sealing seamed edges
1314 holes
132 external screw threads
2 insertion pieces with throttle
21 cylindrical bodies
21a bullet
22 stepped holes
221 approach cones
222 holes with major diameter
223 cone connections
224 holes with intermediate diameter
225 cone connections
226 holes with minor diameter
227 radius
23 outer surfaces
231 cylindrical sections with major diameter
231a has the conical section of major diameter
232 cone connections
233 cylindrical sections with minor diameter
234 radius
Claims (11)
1. a kind of high pressure accumulator for high-pressure injection system, the high pressure accumulator is by limit high-pressure chamber (12,12a)
Cylindrical body (11) and connector (13,13a) are constituted, and the connector is equipped with and leads to the outlet in the high-pressure chamber (12,12a)
Channel (131,131a), wherein throttle (22,22a) are disposed at least one exit passageway (131,131a), to subtract
The weak pressure wave by the injector generation in the connector (13,13a) downstream connection, which is characterized in that
The connector (13,13a) has channel (131,131a) in exit, which has chamber (1312,1312a),
The chamber receives the insertion piece (2,2a) for being equipped with the throttle (22,22a), and
The insertion piece (2,2a) be arranged in by the self-tightening process force closure of the high pressure accumulator chamber (1312,
In 1312a).
2. high pressure accumulator according to claim 1,
It is characterized in that,
Logical inlet of the channel (22,22a) of the insertion piece (2,2a) on the side the high-pressure chamber (12,12a) has
Radius (227,227a).
3. high pressure accumulator according to claim 1,
It is characterized in that,
Channel in the insertion piece (2,2a) is stepped hole (22,22a), the stepped hole by it is a series of have be gradually reduced
The hole of diameter (222,222a, 224,224a, 226,226a) is constituted, the hole by taper function part (223,223a, 225,
225a) separate.
4. high pressure accumulator according to claim 1,
It is characterized in that,
Channel with the throttle (22,22a) has conical entrance (221,221a), and the conical entrance forms sealing
Seat.
5. high pressure accumulator according to claim 1,
It is characterized in that,
The connector (13,13a) has conical entrance (1311,1311a).
6. high pressure accumulator according to claim 1,
It is characterized in that,
The chamber (1312) is cylindrical and forms shoulder (1313) with the hole (1314), and the shoulder generates sealing
Seamed edge,
The insertion piece (2) has outer surface (23), and the outer surface has the cylindrical section of major diameter, so as in assembly
Band is entered with a gap in cylindrical chamber (1312), and the outer surface has the part of minor diameter (233), and the part is described
It is freely prominent in the hole (1314) of connector (13),
Wherein, described two parts (231,233) of the insertion piece (2) are connected by conical section (233), the conical section
It is determined as the seamed edge (1313) for abutting to the connector (13).
7. high pressure accumulator according to claim 1,
It is characterized in that,
The connector (13a) has taper chamber (1312a), and the taper chamber through hole (1314a) continues, the hole
The smaller cross section in cross section with the small base portion than the taper chamber (1312a), and
The insertion piece with throttle (2a) has bullet (231a), and the bullet has than the taper chamber
The smaller length of the length of (1312a), and the cross section of the small base portion of the bullet is small greater than the chamber (1312a)
The cross section of base portion,
Wherein, the taper of the chamber (1312a) and the taper of the bullet (231a) are identical.
8. high pressure accumulator according to claim 7,
It is characterized in that,
The surface of the taper chamber (1312a) and/or the surface of the bullet (231a) have inhomogeneities, unevenness and
Protuberance or recessed geometry, to improve leakproofness in combination with cone in self-tightening, the leakproofness can ensure
Squeeze pressure.
9. high pressure accumulator according to claim 1,
It is characterized in that,
The cross section for the part (233,233a) of the insertion piece (2,2a) entered in the hole (1314,1314a) is less than
The cross section in the hole, not contacted with the hole after the rail (1,1a) and the insertion piece (2,2a) self-tightening.
10. high pressure accumulator according to claim 1,
It is characterized in that,
The length of the part (233,233a) of the insertion piece (2,2a) is less than the length of the hole (1314,1314a), makes
The mouth that is passed through for obtaining the throttle (226,226a) is significantly away from leading in the hole (1314,1314a) to chamber (12,12a)
Entrance.
11. a kind of method for manufacturing high pressure accumulator according to any one of claim 1 to 10,
It is characterized in that,
Chamber (1312,1312a) are manufactured in the exit passageway (131,131a) of each connector (13,13a) by milling,
Manufacture is throttled portion (22,22a) perforative insertion piece (2,2a), wherein the outer diameter of the insertion piece matches the chamber
The diameter of (1312,1312a),
Insertion piece (2,2a) is mounted in each chamber,
The leakproofness of the leakproofness of insertion piece (2,2a) and the entrance of the connector (13,13a) is generated, and
The high pressure accumulator (1,1a) assembled in this way is set to be subjected to autofrettage pressure, to handle the high pressure accumulator
Inner surface and the insertion piece (2,2a) force closure is arranged in the connector (13,13a) the chamber (1312,
In 1312a).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1750420 | 2017-01-19 | ||
| FR1750420A FR3061934B1 (en) | 2017-01-19 | 2017-01-19 | HIGH PRESSURE FUEL INJECTION SYSTEM RAMP |
| PCT/EP2018/050822 WO2018134144A1 (en) | 2017-01-19 | 2018-01-15 | High-pressure accumulator of a high-pressure fuel injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110234865A true CN110234865A (en) | 2019-09-13 |
| CN110234865B CN110234865B (en) | 2022-05-24 |
Family
ID=58455276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880007704.8A Active CN110234865B (en) | 2017-01-19 | 2018-01-15 | High-pressure accumulator for a high-pressure fuel injection system |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3571387B1 (en) |
| JP (1) | JP6855582B2 (en) |
| KR (1) | KR20190103390A (en) |
| CN (1) | CN110234865B (en) |
| FR (1) | FR3061934B1 (en) |
| WO (1) | WO2018134144A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210231087A1 (en) * | 2018-07-26 | 2021-07-29 | Liebherr-Components Deggendorf Gmbh | Connecting piece for a fuel injector of an internal combustion engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3110202B1 (en) * | 2020-05-14 | 2024-04-26 | Duncha France | Fuel injection device comprising a nozzle insert |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193690A (en) * | 1997-03-03 | 1998-09-23 | 臼井国际产业株式会社 | Common rail and method of manufacturing the same |
| JP2001207930A (en) * | 2000-01-26 | 2001-08-03 | Denso Corp | Accumulator fuel injection device |
| CN1662741A (en) * | 2002-06-21 | 2005-08-31 | 万国引擎知识产权有限责任公司 | Pressure wave attenuator for a rail |
| EP1811165A2 (en) * | 2006-01-20 | 2007-07-25 | Denso Corporation | Common rail having orifice |
| CN101454561A (en) * | 2006-03-27 | 2009-06-10 | 欧陆汽车有限责任公司 | Fuel injection system for use in motor vehicle, has screen filter arranged in fuel discharge and/or in fuel supply of fuel high pressure storage |
| EP2975313A1 (en) * | 2013-03-15 | 2016-01-20 | KYB Corporation | Fluid-throttling member |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002322965A (en) * | 2001-04-25 | 2002-11-08 | Otics Corp | Common rail |
| JP4737013B2 (en) * | 2006-02-20 | 2011-07-27 | 株式会社デンソー | Common rail |
| US7603985B2 (en) * | 2007-01-25 | 2009-10-20 | Denso Corporation | Common rail |
-
2017
- 2017-01-19 FR FR1750420A patent/FR3061934B1/en active Active
-
2018
- 2018-01-15 EP EP18700566.5A patent/EP3571387B1/en active Active
- 2018-01-15 CN CN201880007704.8A patent/CN110234865B/en active Active
- 2018-01-15 JP JP2019538622A patent/JP6855582B2/en active Active
- 2018-01-15 KR KR1020197023845A patent/KR20190103390A/en not_active Application Discontinuation
- 2018-01-15 WO PCT/EP2018/050822 patent/WO2018134144A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193690A (en) * | 1997-03-03 | 1998-09-23 | 臼井国际产业株式会社 | Common rail and method of manufacturing the same |
| JP2001207930A (en) * | 2000-01-26 | 2001-08-03 | Denso Corp | Accumulator fuel injection device |
| CN1662741A (en) * | 2002-06-21 | 2005-08-31 | 万国引擎知识产权有限责任公司 | Pressure wave attenuator for a rail |
| EP1811165A2 (en) * | 2006-01-20 | 2007-07-25 | Denso Corporation | Common rail having orifice |
| CN101454561A (en) * | 2006-03-27 | 2009-06-10 | 欧陆汽车有限责任公司 | Fuel injection system for use in motor vehicle, has screen filter arranged in fuel discharge and/or in fuel supply of fuel high pressure storage |
| EP2975313A1 (en) * | 2013-03-15 | 2016-01-20 | KYB Corporation | Fluid-throttling member |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210231087A1 (en) * | 2018-07-26 | 2021-07-29 | Liebherr-Components Deggendorf Gmbh | Connecting piece for a fuel injector of an internal combustion engine |
| US11542902B2 (en) * | 2018-07-26 | 2023-01-03 | Liebherr-Components Deggendorf Gmbh | Connecting piece for a fuel injector of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020505548A (en) | 2020-02-20 |
| CN110234865B (en) | 2022-05-24 |
| FR3061934B1 (en) | 2019-06-07 |
| FR3061934A1 (en) | 2018-07-20 |
| JP6855582B2 (en) | 2021-04-07 |
| EP3571387A1 (en) | 2019-11-27 |
| WO2018134144A1 (en) | 2018-07-26 |
| KR20190103390A (en) | 2019-09-04 |
| EP3571387B1 (en) | 2021-07-21 |
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