CN1773099A - Fuel supply pump for common rail fuel injection system - Google Patents
Fuel supply pump for common rail fuel injection system Download PDFInfo
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- CN1773099A CN1773099A CN 200510068624 CN200510068624A CN1773099A CN 1773099 A CN1773099 A CN 1773099A CN 200510068624 CN200510068624 CN 200510068624 CN 200510068624 A CN200510068624 A CN 200510068624A CN 1773099 A CN1773099 A CN 1773099A
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- valve seat
- oil
- pump
- tight cap
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Abstract
The present invention relates to a fuel-feeding pump of common rail injection system applicable to vehicle low-discharge compression ignition engine. It is mainly characterized by that external peripheral surface of valve seat in its fuel-pumping component has screw threads, the valve seat is fixed in the screw hole of plunger bushing and can be used for making orifice plate be lightly pressed on the sealed end face of plunger bushing. Besides, on the valve seat several circular holes for mounting and removal are set, and the sealing ring is mounted in the circular groove positioned in the middle of clamping nut.
Description
Technical field
The present invention relates to a kind of oil feed pump of internal-combustion engine co-rail oil injection system, particularly relate to the oil feed pump that is applicable to automobile-used low emission compression ignition engine (diesel engine) co-rail oil injection system.
Background technique
In order to satisfy the Abgasgesetz of increasingly stringent, must improve the control accuracy of fuel injection quantity and injection timing, simultaneously the fuel injection rate of each cylinder of motor is accurately controlled.The electric-controlled co-rail injection system is a kind of new technology that can satisfy above-mentioned requirements.Provide high pressure fuel by engine-driven high-pressure fuel-feed pump to common rail pipe in co-rail oil injection system, common rail pressure can reach 160MPa or higher.One or more pump oil parts are housed on the oil feed pump.The oil feed pump pump of prior art oil modular construction is as Japan electric coating company (Denso Corp.) " Fuel Supply Apparatus " (Fig. 3) shown in the European patent EP 1452728.In this oil feed pump pump oil parts, in order to guarantee high-pressure tightness, adopted to rely on to have externally threaded tight cap (17) with solenoid valve iron core (16A), positioning ring (15), oiling valve valve seat (14), and orifice plate (13) is pressed on the project organization on the seal face of plunger bushing (11) together.Need tighten tight cap (17) with very big moment of torsion during assembling.Make solenoid valve iron core (16A) be subjected to powerful extruding, simultaneously, during the work of pump oil parts, solenoid valve iron core (16A) also is subjected to the alternation active force of high pressure oil, its electromagnetic property meeting variation, and because tight cap (17 and plunger bushing (11) seal face between part number many, the cumulative function meeting of the machining error of these parts (mainly being the faces parallel error) produces adverse influence to assembly quality and sealing.In addition, in the said structure of prior art, seal ring (19) must be installed in the groove on the plunger bushing (11), and need earlier solenoid valve iron core (16A), positioning ring (15) and valve seat (14) are contained in the tight cap (17), are contained in together on the plunger bushing (11) with tight cap (17) then.In assembly process, be easy to take place problems such as part landing and seal ring deflection, cause leakage of oil or do over again.So the assembly process process of said structure is bad, the sealing of parts is difficult to guarantee.Also have, described as above-mentioned European patent specification, because erection stress is bigger, can cause the distortion of plunger bushing (11), make the plunger bushing endoporus produce distortion and contraction, influence the sliding of plunger.
Summary of the invention
The purpose of this invention is to provide a kind of new common-rail fuel injection system fuel supply pump structure, the pump oil parts manufacturing and easy to assembly of this oil feed pump, good airproof performance can be eliminated the shortcoming that existing oil feed pump exists.
The technical solution adopted in the present invention is a kind of new oil feed pump pump oil of design parts, and wherein the outer round surface of valve seat (14) is made screw thread, and the screw on plunger bushing (11) top cooperates.And on the end face of flange of valve seat (14), processed the auxiliary hole of a plurality of mounting or dismounting usefulness.Orifice plate (13) can be pressed on the seal face of plunger bushing (11) after tightening valve seat (14).Cancellation plunger bushing (11) is gone up the annular groove that seal ring (19) usefulness is installed, and process one on tight cap the annular groove that seal ring is used is installed.Tight cap (17) is fixed in the screw of plunger bushing (11) with screw thread, and solenoid valve (16) and positioning ring (15) are pressed on the flanged surface of valve seat (14).The outer surface that tight cap (17) is provided with screw thread is made the concavo-convex profile of tooth that can be used for installing and removing tight cap.Because valve seat (14) has born the alternating force of guaranteeing to seal required screwing force and oil pressure generation, it is just less to tighten the needed moment of torsion of tight cap (17).
The present invention compares the beneficial effect that is had with prior art: reduce solenoid valve iron core (16A) suffered pressure when assembling and pump oil parts are worked, improved the Performance And Reliability of solenoid valve (16); The cumulative error that each part surface Roughness and faces parallel produce in the time of can reducing assembling is avoided leakage of oil; Simplify the mounting type of seal ring and pump oil parts, improved the mounting or dismounting manufacturability, improved the functional reliability of pump oil parts.
Description of drawings
Fig. 1 is an a kind of common-rail fuel injection system fuel supply pump embodiment's of the present invention sectional view.
Fig. 2 is the sectional view of middle pump oil parts embodiment illustrated in fig. 1.
Fig. 3 is the pump oil parts of the prior art oil feed pump that is used to contrast.
Fig. 4 is the sectional view of valve seat in the embodiment of the invention (14).
Fig. 5 is that the B of tight cap (17) in the embodiment of the invention is to view.
Embodiment
Describe the structure characteristic and the assembling situation of the common-rail fuel injection system fuel supply pump that designs according to the present invention in detail below in conjunction with accompanying drawing.
Shown in Figure 1 is the oil feed pump of the co-rail oil injection system of a kind of automobile-used low emission compression ignition engine (diesel engine) of design according to the present invention.The camshaft (2) that is installed among the figure in the pump housing (1) is rotated by engine-driving.The camshaft of rotation drives pump oil parts (10) and oil transfer pump (not drawing among the figure) work through tappet body component (3) and piston spring (4).Can provide to common rail pipe during pump oil parts (10) work and reach the 160MPa or the high pressure fuel of high pressure more.
Shown in Figure 2 is the structure of pump oil parts (10) in the present embodiment.Wherein pump oil parts (10) are by plunger bushing (11) and plunger (12) that slides in the plunger bushing endoporus and orifice plate (13), valve seat (14), positioning ring (15), solenoid valve (16), tight cap (17), armature (18), seal ring (19) and outlet valve assembly compositions such as (20).In solenoid valve (16), comprise iron core (16A).This pump oil parts are characterised in that: wherein the periphery of valve seat (14) is processed with screw thread, and valve seat (14) is fixed in the screw of plunger bushing (11) with screw thread, and the finish facing on the orifice plate (13) can be pressed on the seal face of plunger bushing (11).
Also directly utilize valve seat (14) that oil-feed orifice plate (13) is pressed on the seal face of plunger bushing (11) for the ease of assembling valve seat (14), as shown in Figure 4, on the flanged surface of valve seat (14), have a plurality of circular holes that are used to install and remove valve seat (14).The quantity of circular hole is 2 to 8, and the diameter d of circular hole equals the 4-6 millimeter.Valve seat (14) in a kind of preferred embodiment is arranged, adopt 4 circular holes that are uniformly distributed along the circumference (14-1), the diameter d in hole equals 4.2 millimeters.
Shown in Figure 3 is a kind of pump oil parts of the prior art oil feed pump that is used for contrasting.Tight cap (17) shown in the figure adopts sizable moment of torsion, relies on screw thread, successively with solenoid valve iron core (16A), and positioning ring (15), (13) 4 kinds of parts of valve seat (14) and orifice plate are pressed on the seal face of plunger bushing (11) together.Therefore the cumulative function that machining error caused of part produces harmful effect to assembly quality and sealing, leakage of oil easily.And solenoid valve iron core (16A) also can stress deformation, thereby influences the performance and the reliability of solenoid valve.In Fig. 3, seal ring (19) is positioned at the bottom of tight cap (17), is contained in the groove on the plunger bushing (11).Assemble very inconveniently, deflection and leakage of oil take place easily.
As shown in Figure 2, has a circular groove that is used to install seal ring (19) on the tight cap (17) in pump oil parts (10).Have screw thread on the periphery of above-mentioned tight cap (17), tight cap (17) is fixed in the screw of plunger bushing (11) with screw thread, and solenoid valve (16) and positioning ring (15) can be pressed on the end face of flange of valve seat (14).The tight cap (17) in assembling back is mutually concordant with the lower end surface of solenoid valve iron core (16A), easily guarantees the perpendicularity of lower end surface and tight cap thread.Because in the utility model, tight cap (17) is not born the high pressure sealing effect, assembling moment of torsion required when therefore tightening tight cap (17) is less, can not make solenoid valve iron core (16A) produce bad distortion.In addition, in the utility model, seal ring (19) is positioned at the middle part of tight cap (17), is contained in the circular groove on the tight cap (17).So processing and installation are all very convenient, can leakage of oil.
As shown in the figure, in oil feed pump pump oil parts (10), be shaped on the concavo-convex profile of tooth that can be used for installing and removing tight cap (17) on the above-mentioned threaded outer surface in tight cap (17) top.The shape of these teeth sees that the B of tight cap among Fig. 5 is to view (direction of arrow B as shown in Figure 2).
In the oil parts of the oil feed pump pump shown in the present embodiment (10), the screw and two screws that are used for fixing tight cap (17) that are used for fixing valve seat (14) on the above-mentioned plunger bushing (11), be actually the different piece of same screw, just thread center's line of two screws is identical, and the equal diameters of screw thread, pitch equates.In the present embodiment, this screw adopts the standard fine thread.
Claims (7)
1, a kind of oil feed pump of internal-combustion engine co-rail oil injection system, it comprises the pump housing (1), camshaft (2), tappet parts (3), piston spring (4), oil transfer pump (not drawing among the figure) and pump oil parts (10); Wherein said pump oil parts (10) are by plunger bushing (11) and plunger (12) that slides in the plunger bushing endoporus and orifice plate (13), valve seat (14), positioning ring (15), solenoid valve (16, wherein contain iron core 16A), tight cap (17), armature (18), seal ring (19) and outlet valve assembly compositions such as (20) is characterized in that:
Have screw thread on the periphery of wherein said valve seat (14), valve seat (14) is fixed in the screw of plunger bushing (11) with screw thread, and orifice plate (13) can be pressed on the seal face of plunger bushing (11).
2, oil feed pump according to claim 1 is characterized in that: have a plurality of circular holes (14-1) that are used to install and remove valve seat (14) on the flanged surface of the valve seat (14) described in the pump oil parts (10).
3, oil feed pump according to claim 2, it is characterized in that: the quantity that being used to of being had on the flanged surface of the valve seat (14) described in the pump oil parts (10) installed and removed the circular hole of valve seat (14) is 2 to 8, and the diameter d of circular hole (14-1) equals 4～6 millimeters.
4, oil feed pump according to claim 1 is characterized in that: on the tight cap (17) described in the pump oil parts (10) circular groove that is used to install seal ring (19) is arranged.
5, oil feed pump according to claim 1, it is characterized in that: on the periphery of the tight cap (17) described in the pump oil parts (10), have screw thread, tight cap (17) is fixed in the screw of plunger bushing (11) with screw thread, and solenoid valve (16) and positioning ring (15) can be pressed on the end face of flange of valve seat (14).
6, oil feed pump according to claim 1 is characterized in that: the outer surface that is provided with screw thread on the tight cap (17) described in the pump oil parts (10) is shaped on the concavo-convex profile of tooth that can be used for installing and removing tight cap.
7, oil feed pump according to claim 1, it is characterized in that: two screws that are used for fixing the screw of valve seat (14) and are used for fixing tight cap (17) on the plunger bushing (11) described in the pump oil parts (10) are actually the different piece of same screw, just thread center's line of two screws is identical, screw thread measure-alike.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100686248A CN100351513C (en) | 2005-04-26 | 2005-04-26 | Common-rail fuel injection system fuel supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100686248A CN100351513C (en) | 2005-04-26 | 2005-04-26 | Common-rail fuel injection system fuel supply pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1773099A true CN1773099A (en) | 2006-05-17 |
| CN100351513C CN100351513C (en) | 2007-11-28 |
Family
ID=36760208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100686248A Expired - Lifetime CN100351513C (en) | 2005-04-26 | 2005-04-26 | Common-rail fuel injection system fuel supply pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100351513C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387276B (en) * | 2008-10-24 | 2010-06-16 | 福建省莆田市中涵机动力有限公司 | Axial piston high pressure common rail pump |
| CN101498292B (en) * | 2008-01-29 | 2011-03-23 | 株式会社电装 | Pump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588795B (en) * | 2014-10-24 | 2018-07-27 | 无锡南方声学工程有限公司 | A kind of assembling and disassembling filter element device |
| CN105588793A (en) * | 2014-10-24 | 2016-05-18 | 无锡南方声学工程有限公司 | Gas path system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS637276U (en) * | 1986-07-01 | 1988-01-18 | ||
| JPH0742644A (en) * | 1992-10-29 | 1995-02-10 | Nippon Soken Inc | Solenoid valve |
| US5749717A (en) * | 1995-09-12 | 1998-05-12 | Deisel Technology Company | Electromagnetic fuel pump for a common rail fuel injection system |
| CN2588069Y (en) * | 2002-08-19 | 2003-11-26 | 李乐凯 | Electric controlled multi-cylinder straight-arranged fuel-enjection pump |
| CN2804416Y (en) * | 2005-04-26 | 2006-08-09 | 无锡油泵油嘴研究所 | Feed pump of co-rail oil injection system |
-
2005
- 2005-04-26 CN CNB2005100686248A patent/CN100351513C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498292B (en) * | 2008-01-29 | 2011-03-23 | 株式会社电装 | Pump |
| CN101387276B (en) * | 2008-10-24 | 2010-06-16 | 福建省莆田市中涵机动力有限公司 | Axial piston high pressure common rail pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100351513C (en) | 2007-11-28 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CI01 | Publication of corrected invention patent application |
Correction item: Second inventor Correct: Hu Linfeng False: Hu Senfeng Number: 20 Volume: 22 |
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| CI02 | Correction of invention patent application |
Correction item: Inventor second Correct: Hu Linfeng False: Hu Senfeng Number: 2O Page: The title page Volume: 22 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR NO. 2; FROM: HU SENFENG TO: HU LINFENG |
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| ERR | Gazette correction |
Free format text: CORRECT: NO. 2 INVENTOR; FROM: HU SENFENG TO: HU LINFENG |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: NINGBO SHUNTIAN LIANGYUAN FUEL INJECTION EQUIPMENT Co.,Ltd. Assignor: Wuxi Fuel Injection Equipment Research Institute Contract record no.: 2011330000629 Denomination of invention: Common-rail fuel injection system fuel supply pump Granted publication date: 20071128 License type: Exclusive License Open date: 20060517 Record date: 20110530 |
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| ASS | Succession or assignment of patent right |
Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: WUXI INST. OF OIL PUMP INJECTOR Effective date: 20120221 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214063 WUXI, JIANGSU PROVINCE TO: 130011 CHANGCHUN, JILIN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120221 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Patentee after: China Faw Co.,Ltd. Address before: 214063 Jiangsu city of Wuxi province Qian Rong Lu No. 15 Patentee before: Wuxi Fuel Injection Equipment Research Institute |
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| CX01 | Expiry of patent term |
Granted publication date: 20071128 |
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| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Dong Hewei Document name: Notice of Termination of Patent Rights |
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| DD01 | Delivery of document by public notice |