CN102251896A - Plane opening and closing structure of high-pressure common rail oil injector of diesel engine - Google Patents
Plane opening and closing structure of high-pressure common rail oil injector of diesel engine Download PDFInfo
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- CN102251896A CN102251896A CN 201110158732 CN201110158732A CN102251896A CN 102251896 A CN102251896 A CN 102251896A CN 201110158732 CN201110158732 CN 201110158732 CN 201110158732 A CN201110158732 A CN 201110158732A CN 102251896 A CN102251896 A CN 102251896A
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- 238000007789 sealing Methods 0.000 claims abstract description 67
- 230000003746 surface roughness Effects 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims description 33
- 230000008878 coupling Effects 0.000 claims description 21
- 238000010168 coupling process Methods 0.000 claims description 21
- 238000005859 coupling reaction Methods 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- 238000003754 machining Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 16
- 238000000227 grinding Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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Abstract
The invention discloses a plane opening and closing structure of a high-pressure common rail oil injector of a diesel engine. The plane opening and closing structure comprises a control valve coupler and a guide valve seat; the sealing ball in the control valve coupler is a planar sealing ball; an annular sealing plane, a throttling pit, a plane seal of a throttling hole and a quick pressure relief structure are arranged on the upper end face of the guide valve seat; the diameter of the sealing plane of the planar sealing ball is equivalent to the outside diameter of the annular sealing plane; and the hardness, the flatness and the surface roughness of the sealing plane and the annular sealing plane meet the design requirements. The sealing steel ball in the control valve coupler is changed into the planar sealing ball with the sealing plane, a sealing taper hole in the upper end face of the guide valve seat is changed into the plane seal, and the quick pressure relief structure is increased, so the sealing performance of high-frequency opening and closing is reliable, the machining manufacturability of a sealing element is greatly improved, the structure can be finished by adopting conventional metal machining and thermal treatment, the machining efficiency is high, the sealing performance and the quick pressure relief performance are stable and reliable, and the structure is an improvement on the conventional product of Robert Bosch GmbH of Germany.
Description
Technical field:
The present invention relates to a kind of diesel engine high-pressure co-rail oil sprayer, relate in particular to the on-off structure in the high pressure common rail injector.
Background technique:
At present, mainly contain three major companies in the world and producing diesel engine high-pressure co-rail system, Japan electric coating, German Bosch and U.S.'s Delphi.Fuel pressure is produced common rail system and fuel injection is separated, and common rail system has been opened up the new way that reduces diesel engine emissions and noise.Under the background of the energy crisis that is on the rise, the focus that diesel engine has become whole world internal-combustion engine industry to pay close attention to, diesel engine more and more is subjected to user's favor.Compare diesel engine with petrol engine a lot of advantages are arranged: can reduce by 20%～25% CO
2Acceleration performance when toxic emission, the speed of a motor vehicle are low more has superiority, and average fuel consumption is low by 25%～30%, more driving enjoyment can be provided, but compare with petrol engine, and the emission control of diesel engine is again a difficult point.
The lifting of emission standard must promote the development of diesel combustion technology.At home, diesel engine is most of to adopt the mechanical type oil-fired system, and diesel engine direct injection technical development course is shorter, for the requirement of satisfying new emission standard must be used the high-pressure common rail combustion technology.High pressure co-rail system has been realized separating of pressure foundation and course of injection, thereby makes control procedure have more flexibility, can realize the accurate control of little oil mass more accurately, realizes multi-injection better.High pressure co-rail system is widely used abroad, after diesel fuel injection systems develops into the electronic control type system from mechanically controlled type, electron spraying system has experienced three changes again, i.e. position model fuel injection system, time formula fuel injection system and time pressure formula fuel injection system (common rail system).At present, the common rail system of Bosch obtains common application on European passenger car and diesel engine for light vehicle, company of German Bosch (Bosch) produced 2,500 ten thousand the cover common rail systems, and at the jiangsu wuxi investment construction technique center and factory.The most of enterprise of China uses company of German Bosch (Bosch) product to satisfy present stage emission standard (state's III), the high pressure common rail injector assembly that company of German Bosch (Bosch) produces as shown in Figure 1, it comprises solenoid valve 1, the solenoid valve spring is adjusted packing ring 2, solenoid valve spring 3, grommet 4, the very tight cap 5 of electromagnetism, control valve coupling 6, valve assembly 7, orifice plate locating stud 8, seal ring 9, the spring seat of honour 10, adjust pad 11, pressure adjusting spring 12, push rod 13, transition block 14, oil nozzle locating stud 15, injector nozzle matching parts 16, nozzle cap nut 17, last seal ring 18 and injector nozzle matching parts body 19, wherein, sealability directly has influence on the performance index and the working life of oil sprayer between control valve coupling 6 and the valve assembly 7, described control valve coupling 6 is by inhaling iron 61, moving valve core 62, fixed valve base 63 and sealed steel ball 64 are formed, moving valve core 62 is fixedly mounted on the center of inhaling iron 61, sealed steel ball 64 is arranged on the lower end of moving valve core 62, moving valve core 62 critically is sleeved in the pilot hole of fixed valve base 63, and matching gap between the two is 0.002 millimeter～0.005 millimeter; Described valve assembly 7 comprises guide valve seat 71 and piston 72, end face at guide valve seat 71 is provided with throttling taper hole 73, between control valve coupling 6 and the valve assembly 7 is to contact with the line of throttling taper hole 73 by sealed steel ball 64 to carry out fitted seal, because intrasystem oil pressure is very high, realize that sealed steel ball 64 and throttling taper hole 73 seal reliably and with long-term, tapering requirement to throttling taper hole 73 is very high, and is simultaneously, also very high to the requirement of sealed steel ball 64.Wherein, the designing requirement of throttling taper hole 73 is as follows:
1. conical surface seal diameter 0.68mm; 2. surface hardness HRC65～68; 3. surface roughness Ra 0.05;
4. the circularity of taper hole face is less than 0.0005mm; 5. the straightness accuracy of taper hole face is less than 0.0005mm.
From sealing configuration between control valve coupling 6 shown in Figure 1 and the valve assembly 7 and both sealing principles as can be known, between control valve coupling 6 and the valve assembly 7 is to contact with the line of throttling taper hole 73 by sealed steel ball 64 to carry out fitted seal, the diameter of sealed steel ball 64 is 1.33mm～1.34mm, throttling taper hole 73 contacts formed linear sealing diameter with sealed steel ball 64 be 0.68mm, in order to guarantee that the valve cone face has good machining accuracy near 0.68mm, must adopt the top high speed grinding machine in the world to carry out grinding, its grinding rotating speed is 120000r/min, nonetheless, the throttling taper hole also is difficult to reach designing requirement, the up-to-standard rate less than 60% of processing, because at the grinding diameter only is 0.68mm, though the rotating speed of bistrique is high, but grinding linear velocity herein only is 4.3m/s, can't satisfy the high-precision grinding processing request, and the frictional force between the processed conical surface and the bistrique is very big, grinding high temperature makes conical surface annealing cause hardness to reduce easily, and the machining accuracy of throttling taper hole is difficult to reach the design accuracy requirement.
High pressure common rail injector is in frequent keying alternation process, sealed steel ball 64 carries out the contact separation campaign with throttling taper hole 73 repeatedly with moving valve core 62, in this movement process, sealed steel ball 64 contacts the actual potted line that forms constantly to be changed with throttling taper hole 73, because the circularity of throttling taper hole 73 surface roughnesses, surface hardness, taper hole and straightness accuracy all difficulty reach designing requirement, therefore be difficult to the reliability that guarantees that both open and close; In frequent keying working procedure, sealed steel ball 64 self can rotate, and easy deformation, can cause sealing unstable again; Because system oil pressure is very high, the high pressure oil bundle constantly washes away the conical surface of throttling taper hole 73 when opening state, washes away for a long time the conical surface to be dashed to grind irregular trickle shallow slot, causes sealability to descend; In addition, sealed steel ball 64 is installed in the center hole of moving valve core 62 lower end surfaces, and throttling taper hole 73 is opened on the upper-end surface of guide valve seat 71, and always there is deviation in both axis, are easy to generate monolateral contact, thus the sealability that influence is closed.
By above-mentioned objective analysis as can be known, in the existing diesel high pressure common rail injector, design of Sealing Structure is unreasonable between control valve coupling 6 and the valve assembly 7, the technical requirements height of throttling taper hole 73, difficulty of processing is big, can't process with conventional grinding machine, it is very big that whole production line is introduced once input, domestic general oil pump nozzle manufacturing enterprise is difficult to bear, even whole production line is introduced, operator's technical merit is also difficult to be adapted to.This sealing configuration must cause the yield rate of product not high, the poor stability of sealing, and working life is short, the product price height, the user is difficult to bear.Open and close diesel engine high pressure common rail injector above shortcomings in order to overcome the existing sphere of company of German Bosch (Bosch) and the conical surface, produce homemade diesel engine high-pressure co-rail oil spout with independent intellectual property right more economically, the claimant is through years of researches and constantly test, develop simple in structure, technology capability good, sealability is reliable and stable, and plane with low cost opens and closes the diesel engine high pressure common rail injector.
Summary of the invention:
The purpose of this invention is to provide a kind of plane on-off structure of diesel engine high-pressure co-rail oil sprayer, it is simple in structure, technology capability good, and good operating stability has wide actual application prospect.
The technological scheme that the present invention takes is as follows:
A kind of plane on-off structure of diesel engine high-pressure co-rail oil sprayer, comprise control valve coupling and valve assembly, described control valve coupling comprises inhales iron, moving valve core and fixed valve base, and moving valve core is fixedly mounted on the center of inhaling iron, and moving valve core critically is sleeved in the pilot hole of fixed valve base; Described valve assembly is made up of guide valve seat and piston, it is characterized in that: in the lower end of moving valve core the plane sealing ball is housed, is provided with sealing plane in the lower end of plane sealing ball; On the sealing surface of guide valve seat, be provided with circumferential gas pressure relief slot, radially gas pressure relief slot, ring packing plane, throttling hole and throttle orifice, throttle orifice is positioned at the center in throttling hole, the throttling hole is positioned at the center on ring packing plane, circumferentially gas pressure relief slot is positioned at the outside on ring packing plane, circumferentially gas pressure relief slot and ring packing plane are all coaxial with throttle orifice, radially gas pressure relief slot is along circumferentially equally being arranged between circumferential gas pressure relief slot and the ring packing plane, the diameter of sealing plane is more than or equal to the external diameter on ring packing plane, and the diameter of sealing plane is less than the internal diameter of circumferential gas pressure relief slot.
Further, the technical requirements on described sealing plane and ring packing plane is: hardness is HRC65～68, and planeness is less than 0.0005mm, surface roughness Ra 0.05.
Further, the material of plane sealing ball is a pottery.
Owing to changed the sealing configuration between control valve coupling and the valve assembly, the Butt sealing structure that steel ball and taper hole sealing configuration change plane and plane into will be had now, be about to control sealed steel ball complete in the valve coupling and change the plane sealing ball that has sealing plane into, sealing plane is arranged on the lower end of plane sealing ball; Throttling taper hole on the guide valve seat upper-end surface is changed into by circumferential gas pressure relief slot, gas pressure relief slot radially, the ring packing plane, sealing and pressure relief that throttling hole and throttle orifice are formed, throttle orifice is positioned at the center in throttling hole, the throttling hole is positioned at the center on ring packing plane, circumferentially gas pressure relief slot is positioned at the outside on ring packing plane, circumferentially gas pressure relief slot and ring packing plane are all coaxial with throttle orifice, radially gas pressure relief slot is along circumferentially equally being arranged between circumferential gas pressure relief slot and the ring packing plane, the diameter of sealing plane is more than or equal to the external diameter on ring packing plane, the diameter of sealing plane is less than the internal diameter of circumferential gas pressure relief slot, the hardness on sealing plane and ring packing plane is HRC65～68, planeness is less than 0.0005mm, surface roughness Ra 0.05.Like this, when the control valve coupling moves down when being in closed condition, the highi degree of accuracy Butt sealing is carried out on the sealing plane of plane sealing ball and ring packing plane, high pressure oil when the control valve coupling moves on just having begun in the throttle orifice after preliminary step-down is cheated in throttling from the straight-through circumferential gas pressure relief slot of gas pressure relief slot radially, realize quick pressure releasing, thereby satisfied high-frequency keying seal request between control valve coupling and the valve assembly.Because will control sealed steel ball complete in the valve coupling changes the plane sealing ball that has sealing plane into, change the throttling taper hole on the guide valve seat upper-end surface into plane sealing, circumferential gas pressure relief slot and gas pressure relief slot combination quick pressure releasing structure have radially been set up, not only the sealability of high frequency keying is reliable, and the technology capability of Sealing greatly improves, adopt conventional turning, grinding, heat treatment and correct grinding can be processed, the work efficiency height, sealability and quick pressure releasing are stable and reliable for performance, are improvement and raising to company of German Bosch (Bosch) existing diesel high pressure common rail injector.
Description of drawings:
Fig. 1 is the structural representation of company of German Bosch (Bosch) existing diesel high pressure common rail injector;
Fig. 2 is the sealed structural representation of controlling among Fig. 1 between valve coupling and the valve assembly;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is the structural representation that diesel engine high-pressure co-rail oil sprayer of the present invention is housed;
Fig. 5 is a plane sealing spherical structure schematic representation;
Fig. 6 is the partial view in center portion, guide valve seat upper-end surface.
Among the figure: the 1-solenoid valve; 2-solenoid valve spring is adjusted packing ring; 3-solenoid valve spring; The 4-grommet; The very tight cap of 5-electromagnetism; 6-controls valve coupling; The 7-valve assembly; 8-orifice plate locating stud; The 9-seal ring; The 10-spring seat of honour; 11-adjusts pad; The 12-pressure adjusting spring; The 13-push rod; The 14-transition block; 15-oil nozzle locating stud; The 16-injector nozzle matching parts; The 17-nozzle cap nut; The last seal ring of 18-; 19-injector nozzle matching parts body; 61-inhales iron; The 62-moving valve core; The 63-fixed valve base; The 64-sealed steel ball; 65-plane sealing ball; The 66-sealing plane; The 71-guide valve seat; The 72-piston; 73-throttling taper hole; The circumferential gas pressure relief slot of 711-; 712-is gas pressure relief slot radially; 713-ring packing plane; 714-throttling hole; The 715-throttle orifice.
Embodiment:
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing:
Fig. 4 is equipped with diesel engine high-pressure co-rail oil sprayer of the present invention, it comprises solenoid valve 1, the solenoid valve spring is adjusted packing ring 2, solenoid valve spring 3, grommet 4, the very tight cap 5 of electromagnetism, control valve coupling 6, valve assembly 7, orifice plate locating stud 8, seal ring 9, the spring seat of honour 10, adjust pad 11, pressure adjusting spring 12, push rod 13, transition block 14, oil nozzle locating stud 15, injector nozzle matching parts 16, nozzle cap nut 17, last seal ring 18 and injector nozzle matching parts body 19, wherein, control valve coupling 6 is as Fig. 3 and shown in Figure 5, it is by inhaling iron 61, moving valve core 62, fixed valve base 63 and plane sealing ball 65 are formed, moving valve core 62 is fixedly mounted on the center of inhaling iron 61, the material of plane sealing ball 65 is a pottery, plane sealing ball 65 is arranged on the lower end of moving valve core 62, the sealing plane 66 of plane sealing ball 65 is downward, moving valve core 62 critically is sleeved in the pilot hole of fixed valve base 63, and matching gap between the two is 0.002 millimeter～0.005 millimeter; Described valve assembly 7 is as Fig. 3 and shown in Figure 6, it is made up of guide valve seat 71 and piston 72, on the sealing surface of guide valve seat 71, be provided with circumferential gas pressure relief slot 711, radially gas pressure relief slot 712, ring packing plane 713, throttling hole 714 and throttle orifice 715, throttle orifice 715 is positioned at the center in throttling hole 714, throttling hole 714 is positioned at the center on ring packing plane 713, circumferentially gas pressure relief slot 711 is positioned at the outside on ring packing plane 713, circumferentially gas pressure relief slot 711 and ring packing plane 713 are all coaxial with throttle orifice 715, radially gas pressure relief slot 712 is along circumferentially equally being arranged between circumferential gas pressure relief slot 711 and the ring packing plane 713, the diameter of sealing plane 66 is more than or equal to the external diameter on ring packing plane 713, internal diameter less than circumferential gas pressure relief slot 711, the hardness on sealing plane 66 and ring packing plane 713 is HRC65～68, planeness is less than 0.0005mm, surface roughness Ra 0.05.
Claims (3)
1. the plane on-off structure of a diesel engine high-pressure co-rail oil sprayer, comprise control valve coupling (6) and valve assembly (7), described control valve coupling (6) comprises inhales iron (61), moving valve core (62) and fixed valve base (63), moving valve core (62) is fixedly mounted on the center of inhaling iron (61), and moving valve core (62) critically is sleeved in the pilot hole of fixed valve base (63); Described valve assembly (7) is made up of guide valve seat (71) and piston (72), it is characterized in that: in the lower end of moving valve core (62) plane sealing ball (65) is housed, is provided with sealing plane (66) in the lower end of plane sealing ball (65); On the sealing surface of guide valve seat (71), be provided with circumferential gas pressure relief slot (711), gas pressure relief slot (712) radially, ring packing plane (713), throttling hole (714) and throttle orifice (715), throttle orifice (715) is positioned at the center in throttling hole (714), throttling hole (714) is positioned at the center of ring packing plane (713), circumferentially gas pressure relief slot (711) is positioned at the outside of ring packing plane (713), circumferentially gas pressure relief slot (711) and ring packing plane (713) are all coaxial with throttle orifice (715), radially gas pressure relief slot (712) is along circumferentially equally being arranged between circumferential gas pressure relief slot (711) and ring packing plane (713), the diameter of sealing plane (66) is more than or equal to the external diameter of ring packing plane (713), and the diameter of sealing plane (66) is less than the internal diameter of circumferential gas pressure relief slot (711).
2. according to the plane on-off structure of the described diesel engine high-pressure co-rail oil sprayer of claim 1, it is characterized in that: the technical requirements of described sealing plane (66) and ring packing plane (713) is: hardness is HRC65～68, planeness is less than 0.0005mm, surface roughness Ra 0.05.
3. according to the plane on-off structure of the described diesel engine high-pressure co-rail oil sprayer of claim 1, it is characterized in that: the material of plane sealing ball (65) is pottery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110158732XA CN102251896B (en) | 2011-06-14 | 2011-06-14 | Plane opening and closing structure of high-pressure common rail oil injector of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110158732XA CN102251896B (en) | 2011-06-14 | 2011-06-14 | Plane opening and closing structure of high-pressure common rail oil injector of diesel engine |
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| CN102251896A true CN102251896A (en) | 2011-11-23 |
| CN102251896B CN102251896B (en) | 2012-07-11 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166196A (en) * | 1995-10-07 | 1997-11-26 | 罗伯特·博施有限公司 | Electromagnetically operable valve, esp. fuel injection valve |
| JPH10122082A (en) * | 1996-09-02 | 1998-05-12 | Denso Corp | Accumulative fuel injector |
| JP2003293890A (en) * | 2002-04-05 | 2003-10-15 | Denso Corp | Fuel injection valve |
| CN101652559A (en) * | 2007-04-09 | 2010-02-17 | 博世株式会社 | Fuel injection valve |
| CN101660473A (en) * | 2008-08-29 | 2010-03-03 | 株式会社日本自动车部品综合研究所 | Electromagnetic actuator |
| JP2010275908A (en) * | 2009-05-27 | 2010-12-09 | Yanmar Co Ltd | Injector |
| CN202082025U (en) * | 2011-06-14 | 2011-12-21 | 常州博瑞油泵油嘴有限公司 | Plane opening and closing structure of diesel engine high-pressure common rail injector |
-
2011
- 2011-06-14 CN CN201110158732XA patent/CN102251896B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166196A (en) * | 1995-10-07 | 1997-11-26 | 罗伯特·博施有限公司 | Electromagnetically operable valve, esp. fuel injection valve |
| JPH10122082A (en) * | 1996-09-02 | 1998-05-12 | Denso Corp | Accumulative fuel injector |
| JP2003293890A (en) * | 2002-04-05 | 2003-10-15 | Denso Corp | Fuel injection valve |
| CN101652559A (en) * | 2007-04-09 | 2010-02-17 | 博世株式会社 | Fuel injection valve |
| CN101660473A (en) * | 2008-08-29 | 2010-03-03 | 株式会社日本自动车部品综合研究所 | Electromagnetic actuator |
| JP2010275908A (en) * | 2009-05-27 | 2010-12-09 | Yanmar Co Ltd | Injector |
| CN202082025U (en) * | 2011-06-14 | 2011-12-21 | 常州博瑞油泵油嘴有限公司 | Plane opening and closing structure of diesel engine high-pressure common rail injector |
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| CN102251896B (en) | 2012-07-11 |
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Denomination of invention: Plane opening and closing structure of high-pressure common rail oil injector of diesel engine Effective date of registration: 20131113 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2013990000843 |
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Date of cancellation: 20141113 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2013990000843 |
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Denomination of invention: Plane opening and closing structure of high-pressure common rail oil injector of diesel engine Effective date of registration: 20141114 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2014990000944 |
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Date of cancellation: 20151123 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2014990000944 |
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Denomination of invention: Plane opening and closing structure of high-pressure common rail oil injector of diesel engine Effective date of registration: 20151126 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2015990001049 |
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Date of cancellation: 20170509 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2015990001049 |
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Denomination of invention: Plane opening and closing structure of high-pressure common rail oil injector of diesel engine Effective date of registration: 20170509 Granted publication date: 20120711 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd Pledgor: Changzhou Bost Fuel Injection Equipment Co.,Ltd. Registration number: 2017990000389 |
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