CN102128333A - Sealing pin of pipeline for spraying use of high-pressure fuel and pipeline used for spraying use of high-pressure fuel with the same - Google Patents

Sealing pin of pipeline for spraying use of high-pressure fuel and pipeline used for spraying use of high-pressure fuel with the same Download PDF

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Publication number
CN102128333A
CN102128333A CN2011100215955A CN201110021595A CN102128333A CN 102128333 A CN102128333 A CN 102128333A CN 2011100215955 A CN2011100215955 A CN 2011100215955A CN 201110021595 A CN201110021595 A CN 201110021595A CN 102128333 A CN102128333 A CN 102128333A
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CN
China
Prior art keywords
link block
pipeline
pressure
peripheral part
slit
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.)
Granted
Application number
CN2011100215955A
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Chinese (zh)
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CN102128333B (en
Inventor
加藤春美
新沼贤一
小林幸一
高木一树
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Denso Daishin Corp
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Denso Corp
Daishin Seiki KK
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Publication of CN102128333A publication Critical patent/CN102128333A/en
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Publication of CN102128333B publication Critical patent/CN102128333B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166Selection of particular materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004Joints; Sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025Common rails

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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 sealing pin of pipeline for spraying use of high-pressure fuel and pipeline used for the spraying use of the high-pressure fuel with the same. The sealing pin (20) is provided with the following components: a slit (22) which is provided at an axial center at an end of the sealing pin that is inserted into a pipeline opening (23) and is provided with a base (22'); and a sealing pin end periphery part (25) which contacts a conical part (23') at an inside part of the pipe opening (23), wherein the sealing pin end periphery part (25) deforms in an elastic area because of ultra-high inner pressure and contacts with the conical part (23').

Description

Be used for fuel under high pressure spray purposes pipeline link block and be used to use the fuel under high pressure of sealing pin to spray the pipeline of purposes
Technical field
The present invention relates to a kind of fuel under high pressure that under ultrahigh pressure, is used for and spray the self-tightening processing of the pipeline of purposes and claim being used to be sealed in and being used for the link block of tapered portion of pipeline opening inboard that fuel under high pressure is sprayed the pipeline of purposes of internal surface autofrettage (autofrettage) again, and relate to and a kind ofly be used to use the fuel under high pressure of sealing pin to spray the pipeline of purposes.
Background technique
In the past, see as DE102006054440 B3, the open No.2004-92551 of Japanese unexamined patent publication No. etc., become known for being total to the technology that rail and other pipelines that is used for fuel under high pressure injection purposes prevent fatigue fracture enduringly, that is to say the technology that under sealing state, applies high pressure, so that in the material microstructure, stay residual stress, thereby improve intensity (self-tightening processing).With the rising that the pressure of the fuel system that is used for the diesel engine purposes is set, make the internal pressure in the self-tightening processing higher equally.In particular, when applying 800Mpa or higher internal pressure, need prevent the leakage at pipeline connection port place.In this case, sealing cover available on the market has too low sealing resistance to pressure and comes to an end with leakage, therefore can not be as sealing.
In DE102006054440 B3, by conical sealed end being pressed on the opening of workpiece by the oil hydraulic cylinder applied pressure, sealed end seals the opening of workpiece thus.Thus, the power and the internal pressure that can be used in the opening of sealed end sealing workpiece increases pro rata.In such sealing system, be used for becoming complicated with the pressure control of the oil hydraulic cylinder of internal pressure balance.Oil hydraulic pump, high-speed response control valve, and a large amount of other annexes become essential, the result, it is higher that cost finally becomes.When passing through such system automation, owing to workpiece is carried by Trayconcept, so the cost of tray apparatus increases sharply.In addition, the type of the workpiece of being carried by pallet is always not identical.In this case, the opening of workpiece is in always inconstant position, the position at pallet place.For this reason, in automation, when changing type, the opening of workpiece is very difficult with being connected of the sealed end that is used to seal described opening, and goes wrong in setting.
Summary of the invention
Consider that the problems referred to above make the present invention, and the invention provides under ultrahigh pressure, be used for fuel under high pressure spray purposes pipeline self-tightening processing be used to be sealed in be used for fuel under high pressure spray purposes pipeline the pipeline opening inboard tapered portion link block and be used to use the fuel under high pressure of sealing pin to spray the pipeline of purposes.
In order to address this problem, the invention of claim 1 is included under the ultrahigh pressure sprays the link block (20) that the self-tightening processing of the pipeline of purposes seals the pipeline opening (23) of the pipeline that is used for fuel under high pressure injection purposes for being used for fuel under high pressure, wherein said link block (20) is provided with: slit (22), this slit is arranged on the axial centre place of the link block end at insertion tube road junction (23), and has bottom (22'); And link block end peripheral part (25), the peripheral part contact of sealing pin end is in the inboard tapered portion (23') of pipeline opening (23), wherein link block end peripheral part (25) is because the internal pressure of ultrahigh pressure is out of shape and contact tapered portion (23') in elastic region.
Thus,, also can prevent the leakage of pipeline opening, and can eliminate and be used for and the pressure control of the oil hydraulic cylinder of internal pressure balance and oil hydraulic pump, high-speed response control valve, and other annexes even self-tightening adds under the situation of ultrahigh pressure in man-hour.In particular, the slit that is arranged on the axial centre place of link block end stands internal pressure, so peripheral part internal pressure owing to ultrahigh pressure in elastic region in link block end is out of shape, and closely contacts tapered portion with high sealing resistance to pressure.
The invention of claim 2 comprises the invention of claim 1, and wherein link block end peripheral part (25) has the cross section arc.Thus, can guarantee to eliminate the surface pressure of revealing from contact segment.
The invention of claim 3 comprises the invention of claim 1, and wherein the edge section of the bottom (22') of slit (22) is provided with rounding or this bottom (22') is spherical.Thus, can suppress the stress that produces widely, and improve the pressure capacity that material does not have fatigue fracture.
The invention of claim 4 comprises in the claim 1 each invention, wherein add man-hour when carrying out self-tightening with the maximum value of 800Mpa or higher internal pressure, when tapered bore (D1) was appointed as " 1 ", link block had the external diameter (D2), about 0.7 slit internal diameter (d) of about 1.08 link block peripheral part (26) and the geomery of about 0.4 groove depth (H1).
The invention of claim 5 comprises in the claim 1 each invention, and wherein the material of link block has 210Gpa or higher Young's modulus and 1500Mpa or higher yield point.
The invention of claim 6 comprises the pipeline that is used for fuel under high pressure injection purposes, it keeps the link block (20) of the invention of claim 1 to 5 in block (21), to block a shot (21) be tightened on screw thread and be used for the pipeline opening (23) that fuel under high pressure is sprayed the pipeline of purposes, and add man-hour when carrying out self-tightening, by link block (20) sealed pipe road junction (23) with the maximum value of 800Mpa or higher internal pressure.
Thus, can obtain the effect similar to the invention of claim 1.
Be to be noted that above appended reference character is the corresponding example that shows with specific embodiment described below.
Description of drawings
These and other purpose of the present invention and feature will become clearer by the explanation of the preferred embodiment that provides below with reference to accompanying drawing, wherein:
Fig. 1 is the overall perspective that forms the comparison techniques on basis of the present invention;
Fig. 2 is the sectional view of wanting portion of the comparison techniques of Fig. 1;
Fig. 3 is the explanatory drawing that schematically shows the comparison techniques of Fig. 1;
Fig. 4 is the explanatory drawing that schematically shows embodiments of the invention;
Fig. 5 is the enlarged portion of wanting portion that embodiments of the invention are shown; And
Fig. 6 is the enlarged view that the part A of Fig. 5 is shown.
Embodiment
Below, embodiments of the invention will be described with reference to the accompanying drawings.In an embodiment, the part of same structure is distributed identical reference character, and will omit explanation.The part of the structure that the comparison techniques with forming basis of the present invention of the embodiment of the invention is identical is same distributes identical reference character, and omits explanation.
Fig. 1 is the overall perspective that forms the comparison techniques on basis of the present invention.Fig. 2 is the sectional view of wanting portion of the comparison techniques of Fig. 1.Fig. 3 is the explanatory drawing of profile that the comparison techniques of Fig. 1 is shown.
Before the explanation embodiments of the invention,, the comparison techniques that forms basis of the present invention is described referring to figs. 1 to 3.In Fig. 2, on pallet 10, be placed with the workpiece 1 that is used for self-tightening processing.In the pipeline opening 23 of workpiece 1, insert the conical butt sealed end 5' of link block 5.The other end of link block 5 has part in compression 6.Can be pressed on the link block 5 by pressure P by the crimping section 8 of extruding such as oil hydraulic cylinder.Link block 5 is provided with flange 7.Spring 9 is exerted pressure to link block 5 in advance towards the pipeline opening 23 of workpiece 1.
Schematically shown in Figure 3, the state that workpiece 1 is in sealing down and stand internal pressure p (as an example, 800Mpa or higher maximum pressure), in the material microstructure of workpiece 1, to leave residual stress, thereby raising intensity that is to say to be used for self-tightening processing.In utilizing such sealing system, be used for becoming complicated with the pressure control of the oil hydraulic cylinder of internal pressure balance.Oil hydraulic pump, high-speed response control valve, and a large amount of other annexes become essentially, therefore, cost finally rises.When such system is used for automation, owing to workpiece is carried by Trayconcept, so the cost of tray apparatus increases.In addition, the type of the workpiece of being carried by pallet is always not identical.Under these circumstances, the position of the opening of workpiece on pallet is always inconstant.For this reason, when making operation automation, when changing type, being connected between the opening of workpiece and the sealed end that is used to seal described opening becomes very difficult, and goes wrong in setting.
Form contrast with said circumstances, embodiments of the invention are as follows:
Fig. 4 is the explanatory drawing that schematically shows embodiments of the invention.Fig. 5 is the enlarged view of wanting portion that embodiments of the invention are shown.Fig. 6 is the enlarged view that the part A of Fig. 5 is shown.
Shown in Figure 4 and 5, the workpiece 1 that is used for self-tightening processing under ultrahigh pressure is provided with pipeline opening 23.The peripheral part of pipeline opening 23 is threaded, and has the block 21 that is fastened to described pipeline opening by screwing.As shown in Figure 5, in block 21, be provided with porosely 32, link block 20 inserts in these holes.Reference character 30 and 31 is a drain boles.
Each link block 20 has the peripheral part of being made up of link block peripheral part 26 and link block end peripheral part 25.The part of link block end peripheral part 25 contacts tapered portion 23' in pipeline opening 23.Link block end peripheral part 25 is preferably the cross section arc of radius R 1.Link block end peripheral part 25 is not limited to above arc or arc, and can also be any curved surface that comprises conical surface.In addition, the axial centre place in the link block end at insertion tube road junction 23 is provided with the slit 22 with bottom 22'.Edge part office at the bottom of slit 22 22' is provided with the R part.Bottom 22' can also be a spherical surface.
Adjust the circumference of each pipeline opening 23, make when rotating block 21 the tapered portion 23' that the part of link block end peripheral part 25 contacts in pipeline opening 23 inboards with predetermined pressure.
Schematically shown in Figure 4, to block a shot and 21 be placed on the workpiece 1 so that workpiece 1 sealing is in closed state, then, apply internal pressure p (as an example, 800Mpa or higher maximum pressure), thereby improve intensity in the material microstructure of workpiece 1, to leave residual stress, that is to say to be used for self-tightening processing.At this moment, be used to the power of the internal pressure p of autonomous hydraulic power, be used as at 22'' place, the side of slit 22 to cause, that is to say the power that makes link block 20 distortion along the direction of link block end peripheral part 25, thereby link block 20 is out of shape by radially expanding.The slit 22 that is arranged on the axial centre place of link block end stands internal pressure, so the part of link block end peripheral part 25 is out of shape in elastic region and is forced to by the internal pressure of ultrahigh pressure and closely contacts tapered portion 23' with high sealing resistance to pressure.
Thus, the sealing that can tackle ultrahigh pressure becomes possibility.At this, " ultrahigh pressure " indication is used for the pressure of the common rail of diesel engine purposes.As an example, ultrahigh pressure is indicated the pressure of about hundreds of Mpa.
When link block end peripheral part 25 is out of shape owing to the ultrahigh pressure internal pressure of 800Mpa or higher maximum pressure and contacts tapered portion 23', the shape of link block will be described as an example in elastic region.Determine size value by test and analysis, but the present invention is not limited to described size value.
As shown in Figure 6, add man-hour when carrying out self-tightening with 800Mpa or higher internal pressure maximum value, when when being appointed as " 1 ", the ratio of the geomery of each link block is with the inside diameter D 1 of tapered portion 23' (D1 3 between 5mm): the outer diameter D 2 of link block peripheral part is that about 0.7, groove depth H1 is about 0.4 for about 1.08, slit inner diameter d.The radius R 1 of link block end peripheral part 25 can be about 1/2 of an outer diameter D 2 as an example.At this, " approximately " be illustrated in respective value 10% in.
In this case, the external diameter of each link block be set at the inside diameter D 1 of tapered portion 23' hole (hole) in the inboard of pipeline opening 23 about 10%, so that become possibility with reliable contact of tapered portion 23', but it is about 1.08 that the outer diameter D 2 of link block peripheral part is not limited to, and can set for suitably so that make with reliable contact of tapered portion 23' and become possibility.Other ratios also can be set for corresponding with the outer diameter D 2 of link block peripheral part suitably, so that the distortion that the internal pressure by ultrahigh pressure is caused becomes possibility with contacting.
In above embodiment, as an example, add man-hour when carrying out self-tightening with the maximum value of 800Mpa or higher internal pressure p, when tapered bore D1 is appointed as " 1 ", the geomery of link block 20 be 1.08 first numerical value or before and after first numerical value 10% with interior link block peripheral part D2,0.7 second value before and after the second value 10% with the third value of interior slit internal diameter (d) and 0.4 or before and after third value 10% with interior groove depth (H1).The present invention is not limited to the numerical value of this example.Enough is, sets outer diameter D 2 and other ratios of link block peripheral part suitably, makes link block end peripheral part 25 can contact tapered portion 23' reliably because the internal pressure of ultrahigh pressure be out of shape also in elastic region.
The material of link block must have 210Gpa or higher Young's modulus and 1500Mpa or higher yield point.As an example, can mention SHK51 (JIS) etc., but importantly, material can be out of shape in elastic region and is used for contact, and can not rupture.
As shown in Figure 5, preferably, link block 20 is out of shape in elastic region, and the tapered portion 23' in the contact tube road junction 23, makes the part of link block end peripheral part 25 owing to adhere to closely with fastening and link to each other with tapered portion.In addition, can obtain contact in the edge part office of the innermost circumference of tapered portion 23'.In this case, the shape of link block end peripheral part 25 can be the cone shape of about 60 degree cone angles.
Has internal pressure 800Mpa or the thinking behind of higher peaked superhigh pressure sealing condition is as follows.
1. guarantee leak free surface pressure (guaranteeing sealing force) in the contacting part office.
2. the stress that suppress to produce also satisfies material and does not have the pressure capacity of fatigue fracture (elastic region even distortion is arranged).
For being formed with the outside open mouthful pipeline opening of taper, above-mentioned 1 in order to handle, the contact segment that makes link block end peripheral part 25 is an arc.Above-mentioned 2 in order to handle, give 22' bight, the bottom R (rounding) of slit 22.As the effect of the bight R of the bottom 22' of slit 22, can mention and avoid stress to concentrate and guarantee wall thickness, to produce enhanced strength.
The process (method) of utilizing link block 20 of the present invention to be used for self-tightening processing below will be described.Workpiece 1 is fastened to pallet 10.As the step before the self-tightening processing, will block a shot and 22 be fastened to pipeline opening by screwing machinery.Next, carry out self-tightening processing.Thus, workpiece 1 stands high pressure under sealing state, and leaves residual stress in the material microstructure, thereby improves intensity.After this, in subsequent step, will screw machinery and be used for removing block 20 from pipeline opening 23.Be to be noted that Work transfer device need not specifically to be confined to pallet 10.This Work transfer device only needs to make location and conveying to become possibility.
Although described the present invention with reference to the certain embodiments of selecting for purpose of illustration, under the situation that does not depart from basic conception of the present invention and scope, obviously can make many modification to the present invention by those skilled in the art.

Claims (6)

1. one kind is sprayed the link block (20) that the self-tightening processing of the pipeline of purposes seals the pipeline opening (23) of the pipeline that is used for fuel under high pressure injection purposes for being used for fuel under high pressure under ultrahigh pressure, wherein
Described link block (20) is provided with:
Slit (22), described slit are arranged on the axial centre place of the link block end of inserting described pipeline opening (23), and have bottom (22'); And
Link block end peripheral part (25), described link block end peripheral part contact in the inboard tapered portion (23') of described pipeline opening (23),
Wherein said link block end peripheral part (25) and contacts described tapered portion (23') because the internal pressure of ultrahigh pressure is out of shape in elastic region.
2. link block according to claim 1, wherein said link block end peripheral part (25) has the cross section arc.
3. link block according to claim 1, the edge section of the described bottom (22') of wherein said slit (22) is provided with rounding or described bottom (22') is spherical.
4. link block according to claim 1, wherein add man-hour when carrying out self-tightening with the maximum value of 800Mpa or higher described internal pressure, when described tapered portion internal diameter (D1) was appointed as " 1 ", described link block had the external diameter (D2), about 0.7 slit internal diameter (d) of about 1.08 link block peripheral part (26) and the geomery of about 0.4 groove depth (H1).
5. link block according to claim 1, the material of wherein said link block have 210Gpa or higher Young's modulus and 1500Mpa or higher yield point.
6. be used for fuel under high pressure and spray the pipeline of purposes, this pipeline keeps the link block (20) of the invention of claim 1 to 5 in block (21), to block a shot (21) be tightened on screw thread and be used for the pipeline opening (23) that fuel under high pressure is sprayed the pipeline of purposes, and add man-hour when carrying out self-tightening, seal described pipeline opening (23) by described link block (20) with the maximum value of 800Mpa or higher internal pressure.
CN 201110021595 2010-01-19 2011-01-19 Sealing pin of pipeline for spraying use of high-pressure fuel and pipeline used for spraying use of high-pressure fuel with the same Expired - Fee Related CN102128333B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010008943A JP5340184B2 (en) 2010-01-19 2010-01-19 High pressure fuel injection pipe seal pin
JP2010-008943 2010-01-19

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CN102128333A true CN102128333A (en) 2011-07-20
CN102128333B CN102128333B (en) 2013-05-08

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JP (1) JP5340184B2 (en)
CN (1) CN102128333B (en)
DE (1) DE102011000121A1 (en)
FR (1) FR2955273B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012255478A (en) * 2011-06-08 2012-12-27 Denso Corp Sealing system and sealing method
US9133802B2 (en) 2013-05-09 2015-09-15 Caterpillar Inc. Device for sealing orifices on nozzle of fuel injector for autofrettage process
GB201501987D0 (en) * 2015-02-06 2015-03-25 Delphi International Operations Luxembourg S.�.R.L. Method to manufacture a common rail

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10221192A (en) * 1997-02-07 1998-08-21 Otix:Kk Structure of metal seal for high-pressure liquid circuit
JP2001082664A (en) * 1999-09-10 2001-03-30 Usui Internatl Ind Co Ltd Connecting structure of branch connecting body for common rail
US20010009148A1 (en) * 2000-01-25 2001-07-26 Kikuo Asada Common rail
WO2002029238A1 (en) * 2000-10-03 2002-04-11 Detroit Diesel Corporation High-pressure common fuel rail system for internal combustion engine
CN1316159C (en) * 2002-09-02 2007-05-16 臼井国际产业株式会社 Common rail for diesel engine
DE102006054440B3 (en) * 2006-11-16 2007-12-13 Maximator Gmbh Autofrettage method for a fuel injection system of a diesel engine comprises reducing the volume for the fluid using a displacement plunger displaced by a plunger opening of a workpiece in the inner chamber of the workpiece

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4601517B2 (en) * 2005-08-26 2010-12-22 臼井国際産業株式会社 Sealing method for common rail
JP4919414B2 (en) * 2006-03-14 2012-04-18 臼井国際産業株式会社 Connecting head structure of high-pressure fuel injection pipe
JP5178176B2 (en) * 2007-12-17 2013-04-10 臼井国際産業株式会社 Connecting head structure of high-pressure fuel injection pipe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10221192A (en) * 1997-02-07 1998-08-21 Otix:Kk Structure of metal seal for high-pressure liquid circuit
JP2001082664A (en) * 1999-09-10 2001-03-30 Usui Internatl Ind Co Ltd Connecting structure of branch connecting body for common rail
US20010009148A1 (en) * 2000-01-25 2001-07-26 Kikuo Asada Common rail
WO2002029238A1 (en) * 2000-10-03 2002-04-11 Detroit Diesel Corporation High-pressure common fuel rail system for internal combustion engine
CN1316159C (en) * 2002-09-02 2007-05-16 臼井国际产业株式会社 Common rail for diesel engine
DE102006054440B3 (en) * 2006-11-16 2007-12-13 Maximator Gmbh Autofrettage method for a fuel injection system of a diesel engine comprises reducing the volume for the fluid using a displacement plunger displaced by a plunger opening of a workpiece in the inner chamber of the workpiece

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Publication number Publication date
CN102128333B (en) 2013-05-08
JP2011149282A (en) 2011-08-04
FR2955273B1 (en) 2016-01-01
FR2955273A1 (en) 2011-07-22
DE102011000121A1 (en) 2011-09-01
JP5340184B2 (en) 2013-11-13

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Address after: Kariya City, Aichi Prefecture, Japan

Co-patentee after: Denso Daishin Corporation

Patentee after: Denso Co., Ltd.

Address before: Kariya City, Aichi Prefecture, Japan

Co-patentee before: Daishin Seiki Co., Ltd.

Patentee before: Denso Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130508

Termination date: 20200119