CN104024635A - High-Pressure Fuel Pump For A Fuel Injection System - Google Patents
High-Pressure Fuel Pump For A Fuel Injection System Download PDFInfo
- Publication number
- CN104024635A CN104024635A CN201280062345.9A CN201280062345A CN104024635A CN 104024635 A CN104024635 A CN 104024635A CN 201280062345 A CN201280062345 A CN 201280062345A CN 104024635 A CN104024635 A CN 104024635A
- Authority
- CN
- China
- Prior art keywords
- hollow cylinder
- sealing
- pump
- pressure fuel
- bellows
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—Pistons
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0443—Draining of the housing; Arrangements for handling leaked fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a high-pressure fuel pump, in particular a plug-in pump, for a fuel injection system for injecting fuel into the combustion chamber of an internal combustion engine, comprising a pump piston (1) which can carry out a stroke movement and the first end (1.1) of which is guided in a hollow cylinder (2) and the second end (1.2) is indirectly supported on a camshaft or eccentric shaft (4) via a cup-shaped component (3). The high-pressure fuel pump further comprises a seal (5) which is preferably designed as a bellows and which is fixed to the pump piston (1) at one end and to the hollow cylinder (2) at the other end, thereby forming an annular space (6). According to the invention, a guide gap (7) which is formed between the pump piston (1) and the hollow cylinder (2) is designed as an annular gap seal in order to seal the annular space (6). Furthermore, the guide gap (7) opens into an annular groove (8) which is formed in the hollow cylinder (2) and which is connected to a leakage line (9) in order to recirculate a leakage quantity.
Description
Technical field
The invention particularly relates to the high-pressure fuel pump that a kind of fuel injection system is used, it has the feature of claim 1 preamble, and described high-pressure fuel pump is constructed to plug-in pump, for injecting fuel into the firing chamber of internal-combustion engine.
Background technique
For example know from document DE 10 2,008 002 195 A1 the high-pressure fuel pump that a kind of internal-combustion engine is used, it is formed into plug-in pump.Described high-pressure fuel pump comprises piston, and an end of described piston exceeds hollow cylinder, and reciprocates to by Compress Spring in the radial protrusion portion of the live axle that is arranged in hollow cylinder, and wherein this live axle is orientated around an axis.In order to separate fuel and lubricant oil, especially in order to stop fuel to penetrate in the fuel feeding inner chamber of internal-combustion engine, the end that exceeds hollow cylinder that this part of document proposes described piston is connected in the mode of hydraulic seal by bellows with described hollow cylinder, described bellows, hollow cylinder and pump piston surround an annular space, this annular space is connected in a leakage line, and wherein said leakage line is directly led in described annular space.
The sylphon seal of the above-mentioned type belongs to the encapsulating method of contactless.The shortcoming that it exists is to cause internal-combustion engine to stop rapidly.
In addition, the known for example rod seal of contact seal method and metal sealing, form leaking helpful annular space.Day by day severe along with the Abgasgesetz of motor-vehicle tail-gas, this leakage no longer can be tolerated.
Summary of the invention
Thereby departing from the foregoing prior art, task of the present invention is to illustrate a kind of high-pressure fuel pump, especially plug-in pump, ensures that by it reliable and stable fuel separates.
This high-pressure fuel pump by a kind of feature with claim 1 solves.Favourable improvement project of the present invention provides in the dependent claims.
The high-pressure fuel pump that the fuel injection system that the present invention proposes is used, especially plug-in pump, for injecting fuel into the firing chamber of internal-combustion engine, comprise reciprocating pump piston, the first end of described pump piston is directed in hollow cylinder, and the second end of described pump piston is supported on camshaft or eccentric shaft by cup-shaped parts indirectly.The Sealing that it is bellows that described high-pressure service pump also comprises by preferable configuration, the described Sealing that is bellows by preferable configuration is fixed on pump piston in a side, is fixed on hollow cylinder, thus looping space at opposite side.In the present invention, in order to seal described annular space, the guiding clearance forming between described pump piston and hollow cylinder is constructed to annular space sealing configuration.The present invention also proposes, and described guiding clearance is led in circular groove, and wherein said circular groove is formed in described hollow cylinder, and is connected to the fuel of leakage line to reflux and to be leaked.High-pressure service pump of the present invention has not only been applied the encapsulating method of contactless, has also applied the encapsulating method of contact-type.The combination of these two kinds of encapsulating methods thereby ensured that especially medium separates reliably., at encapsulating method, especially utilize under the situation that the contactless encapsulating method of bellows breaks down, because the sealing sealing by described annular space is still guaranteed, internal-combustion engine still can move meanwhile.In addition, by the combination of two kinds of encapsulating methods, the load of the described Sealing that is bellows by preferable configuration also can reduce, thereby seldom considers to break down.Because the sealing of described annular space makes described leakage line depart from from described annular space, the Sealing that described annular space is bellows by preferable configuration around, thereby in described annular space, make described Sealing add the pressure surge reduction of heavy load.
Preferably, form another guiding clearance between described pump piston and hollow cylinder, this guiding clearance is constructed to annular space sealing configuration, and leads in described circular groove.Described another guiding clearance separates by the circular groove forming in described hollow cylinder with described the first guiding clearance.Ensure that thus the leakage flow flowing in described circular groove by described another guiding clearance discharges by leakage line, and do not arrive described by the Sealing that is bellows by preferable configuration around annular space, wherein said leakage line is connected in described circular groove.Avoid by this way the pressure surge in described annular space.Two are constructed to the needed length l of the guiding clearance of annular-gap seal
1and l
2can determine by simulating.Preferably, the length l of described another guiding clearance
2be selected as being greater than the length l of described the first guiding clearance
1.
According to a preferred embodiment of the invention, the described Sealing that is preferably constructed to bellows is fixed on the outer circumferential face of described pump piston.Make by this way by described Sealing around the volume of annular space reach minimum.Also preferably, utilize crimping ring that described Sealing is fixed on pump piston.Described crimping ring can make described Sealing be connected to airtightly on described pump piston.Alternatively or addedly, other fixed block can be set.
The present invention also proposes, and the Sealing that described preferable configuration is bellows is fixed on the outer circumferential face of described hollow cylinder.Particularly preferably, described fixing also utilizes crimping ring to realize, to cause and be tightly connected simultaneously.
According to improvement project of the present invention, the Sealing that described preferable configuration is bellows is fixed on the outer circumferential face of described hollow cylinder, and this outer circumferential face is formed in the neck ring being placed on hollow cylinder.Advantageously, described neck ring is radially inwardly placed on described hollow cylinder, and guiding clearance between pump piston and hollow cylinder, that be constructed to annular space sealing configuration is extended.The Sealing that is preferably constructed to bellows is positioned near described pump piston by this way, thus described by described Sealing around the volume of annular space further reduce.Described preferable configuration is that each fold of Sealing and direct the contact also of described pump piston of bellows avoided, to improve the working life of described Sealing.Described preferable configuration be bellows Sealing length thereby be chosen to be and make the open-angle of each ripple as far as possible little in the time of pump piston to-and-fro motion.
In order to improve the serviceability that described preferable configuration is the Sealing of bellows, and then improve its working life, it is that especially plastics are made with resistance to anti-material that the present invention also proposes described Sealing, and wherein said plastics are for example teflon.
Brief description of the drawings
Below with reference to the accompanying drawings, describe the preferred embodiments of the present invention in detail, wherein:
Fig. 1 is the longitudinal sectional view that is implemented as the high-pressure fuel pump of plug-in pump according to the present invention;
Fig. 2 is the sectional view of pump piston guiding area in Fig. 1;
Fig. 3 is the sectional view that in Fig. 1, bellows seal is fixed on the region on hollow cylinder;
Fig. 4 is the stereogram of bellows seal.
Embodiment
The plug-in pump that Fig. 1 shows comprises pump piston 1, and the first end 1.1 of pump piston 1 is contained in the hollow cylinder 2 of cylinder head, and its second end 1.2 is supported on camshaft 4 indirectly by cup-shaped parts 3.The second end 1.2 forms piston base 17, and spring seat 16 is positioned in piston base 17, and wherein spring seat 16 is for holding spring 15.The spring force of spring 15 keeps cup-shaped parts 3 and pump piston 1 to contact with camshaft 4.Spring 15 and cup-shaped parts 3 are around hollow cylinder 2.
For sealing guiding clearance 7,10, pump piston 1 is connected by the Sealing 5 that is constructed to bellows with hollow cylinder 2.Sealing 5 is fixed in a side on the outer circumferential face 11 of pump piston 1, is fixed on the outer circumferential face 13 of neck ring 14 at opposite side, and wherein neck ring 14 is placed on hollow cylinder 2.These fixedly utilize crimping ring 12 to carry out, and crimping ring 12 is connected on pump piston 1 and hollow cylinder 2 Sealing 5 airtightly.The Sealing 5 that is constructed to bellows surrounds annular space 6, and guiding clearance 7 is led in annular space 6.Guiding clearance 7 terminates in circular groove 8, and wherein circular groove 8 is configured in hollow cylinder 2, and is connected in leakage line 9 so that the leaked fuel of leaving by another guiding clearance 10 backflow.Ensure that thus described leaked fuel does not arrive in annular space 6 and causes pressure surge, and then increase the weight of the load of Sealing 5.
Shown in section as shown in from Fig. 2, length l
1and l
2be chosen to be l
1<l
2.Can find out optimum length by simulation, the optimum length here refers to and ensures enough sealings so that medium separates.
The section of Fig. 3 shows the Sealing 5 that is constructed to bellows and utilizes crimping ring 12 to be fixed in the neck ring 14 of hollow cylinder 12.In order to receive crimping ring 12, form the axle collar 18 (referring to Fig. 4) at the two ends of Sealing 5, the axle collar 18 can be installed crimping ring 12.The axle collar 18 can also make Sealing 5 be arranged on simply on the outer circumferential face 11 of pump piston 1 and be placed on the outer circumferential face 13 of the neck ring 14 on hollow cylinder 2.The position of the axle collar 18 is here chosen to be, and makes the fold of described bellows keep spaced apart with respect to pump piston 1.Meanwhile, the volume of annular space 6 is also reduced to minimum, pumps volume reach minimum simultaneously so that undesirable.
Addedly point out, except the bellows seal shown in Fig. 1-4, Sealing 5 also can be embodied as other membrane seal.
Claims (6)
1. the high-pressure fuel pump that fuel injection system is used, especially plug-in pump, for injecting fuel into the firing chamber of internal-combustion engine, comprise reciprocating pump piston (1), the first end (1.1) of described pump piston (1) is directed in hollow cylinder, its the second end (1.2) is supported on camshaft or eccentric shaft (4) by cup-shape member (3) indirectly, described high-pressure fuel pump also comprises the Sealing that a preferable configuration is bellows (5), described preferable configuration is that the Sealing (5) of bellows is fixed on described pump piston (1) above and is fixed on hollow cylinder (2) at opposite side in a side looping space (6) in the situation that, it is characterized in that,
In order to seal described annular space (6), the guiding clearance (7) forming between described pump piston (1) and hollow cylinder (2) is embodied as annular space sealing configuration, and described guiding clearance (7) are led in circular groove (8), wherein said circular groove (8) is configured in described hollow cylinder (2) and is connected to leakage line (9) so that the fuel return leaking.
2. high-pressure fuel pump according to claim 1, it is characterized in that, between described pump piston (1) and hollow cylinder (2), form and the guiding clearance (10) led in described circular groove (8) is embodied as annular space sealing configuration.
3. high-pressure fuel pump according to claim 1 and 2, it is characterized in that, described preferable configuration is that the Sealing (5) of bellows is fixed on the outer circumferential face (11) of described pump piston (1), and the wherein said fixing crimping ring (12) that preferably utilizes is realized.
4. according to high-pressure fuel pump in any one of the preceding claims wherein, it is characterized in that, described preferable configuration is that the Sealing (5) of bellows is fixed on the outer circumferential face (13) of described hollow cylinder (2), and the wherein said fixing crimping ring (12) that preferably utilizes is realized.
5. high-pressure fuel pump according to claim 4, is characterized in that, it is upper that described outer circumferential face (13) is configured in neck ring (14), and wherein said neck ring (14) is placed on described hollow cylinder (2).
6. according to high-pressure fuel pump in any one of the preceding claims wherein, it is characterized in that, the Sealing (5) that described preferable configuration is bellows is that especially plastics are made with resistance to anti-material, and described plastics are for example teflon.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011089967.7 | 2011-12-27 | ||
| DE102011089967A DE102011089967A1 (en) | 2011-12-27 | 2011-12-27 | High-pressure fuel pump for a fuel injection system |
| PCT/EP2012/076918 WO2013098301A1 (en) | 2011-12-27 | 2012-12-27 | High-pressure fuel pump for a fuel injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104024635A true CN104024635A (en) | 2014-09-03 |
| CN104024635B CN104024635B (en) | 2016-09-07 |
Family
ID=47603563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280062345.9A Expired - Fee Related CN104024635B (en) | 2011-12-27 | 2012-12-27 | The high pressure fuel pump of fuel injection system |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2798210B1 (en) |
| CN (1) | CN104024635B (en) |
| DE (1) | DE102011089967A1 (en) |
| IN (1) | IN2014DN03227A (en) |
| WO (1) | WO2013098301A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360039A (en) * | 2018-03-26 | 2019-10-22 | 世倍特集团有限责任公司 | High pressure fuel pump for fuel injection system |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013216983A1 (en) | 2013-08-27 | 2015-03-05 | Robert Bosch Gmbh | pump |
| EP2923070B1 (en) * | 2013-10-14 | 2017-07-05 | Continental Automotive GmbH | High pressure pump |
| DE102013224882A1 (en) | 2013-12-04 | 2015-06-11 | Robert Bosch Gmbh | Pump for conveying a fluid |
| CN104728008A (en) * | 2013-12-23 | 2015-06-24 | 博世有限公司 | Fuel injection pump |
| DE102014201849A1 (en) | 2014-02-03 | 2015-08-06 | Robert Bosch Gmbh | Pump for conveying a fluid |
| DE102014202338A1 (en) | 2014-02-10 | 2015-08-13 | Robert Bosch Gmbh | Pump for conveying a fluid |
| DE102014202340A1 (en) | 2014-02-10 | 2015-08-13 | Robert Bosch Gmbh | Pump for conveying a fluid |
| DE102014202571A1 (en) | 2014-02-12 | 2015-08-13 | Robert Bosch Gmbh | Pump for conveying a fluid |
| WO2016055250A1 (en) * | 2014-10-09 | 2016-04-14 | Robert Bosch Gmbh | Pump for supplying fuel at high pressure to an internal combustion engine |
| GB201522211D0 (en) | 2015-12-16 | 2016-01-27 | Delphi Internat Operations Luxembourg S À R L | High pressure pump with pump spring sealing sleeve |
| DE102016105209A1 (en) | 2016-02-02 | 2017-08-03 | Darius Loba | High-pressure fuel pump with a weight-reduced piston |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2630123A1 (en) * | 1976-07-05 | 1978-01-12 | Messer Griesheim Gmbh | DEVICE FOR PROTECTING THE PISTON RODS OF PISTON PUMPS |
| DE102004035188A1 (en) * | 2004-07-21 | 2006-02-16 | Bosch Rexroth Aktiengesellschaft | pump |
| CN101000026A (en) * | 2006-01-13 | 2007-07-18 | 通用汽车环球科技运作公司 | Statically sealed high pressure fuel pump and method |
| DE102008002088A1 (en) * | 2008-05-30 | 2009-12-03 | Robert Bosch Gmbh | High-pressure fuel pump |
| DE102008002195A1 (en) * | 2008-06-04 | 2009-12-10 | Robert Bosch Gmbh | Plug-in pump for internal combustion engine, has hollow cylinder and piston end connected with each other in fluid-tight manner by bellows, where annular space enclosing piston is attached to leakage line |
| DE102010030342A1 (en) * | 2010-06-22 | 2011-12-22 | Robert Bosch Gmbh | piston pump |
-
2011
- 2011-12-27 DE DE102011089967A patent/DE102011089967A1/en not_active Withdrawn
-
2012
- 2012-12-27 WO PCT/EP2012/076918 patent/WO2013098301A1/en active Application Filing
- 2012-12-27 CN CN201280062345.9A patent/CN104024635B/en not_active Expired - Fee Related
- 2012-12-27 EP EP12818522.0A patent/EP2798210B1/en not_active Not-in-force
-
2014
- 2014-04-22 IN IN3227DEN2014 patent/IN2014DN03227A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2630123A1 (en) * | 1976-07-05 | 1978-01-12 | Messer Griesheim Gmbh | DEVICE FOR PROTECTING THE PISTON RODS OF PISTON PUMPS |
| DE102004035188A1 (en) * | 2004-07-21 | 2006-02-16 | Bosch Rexroth Aktiengesellschaft | pump |
| CN101000026A (en) * | 2006-01-13 | 2007-07-18 | 通用汽车环球科技运作公司 | Statically sealed high pressure fuel pump and method |
| DE102008002088A1 (en) * | 2008-05-30 | 2009-12-03 | Robert Bosch Gmbh | High-pressure fuel pump |
| DE102008002195A1 (en) * | 2008-06-04 | 2009-12-10 | Robert Bosch Gmbh | Plug-in pump for internal combustion engine, has hollow cylinder and piston end connected with each other in fluid-tight manner by bellows, where annular space enclosing piston is attached to leakage line |
| DE102010030342A1 (en) * | 2010-06-22 | 2011-12-22 | Robert Bosch Gmbh | piston pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360039A (en) * | 2018-03-26 | 2019-10-22 | 世倍特集团有限责任公司 | High pressure fuel pump for fuel injection system |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
Also Published As
| Publication number | Publication date |
|---|---|
| IN2014DN03227A (en) | 2015-05-22 |
| EP2798210A1 (en) | 2014-11-05 |
| EP2798210B1 (en) | 2017-05-24 |
| WO2013098301A1 (en) | 2013-07-04 |
| DE102011089967A1 (en) | 2013-06-27 |
| CN104024635B (en) | 2016-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20160907 Termination date: 20211227 |