CN104024635B - The high pressure fuel pump of fuel injection system - Google Patents
The high pressure fuel pump of fuel injection system Download PDFInfo
- Publication number
- CN104024635B CN104024635B CN201280062345.9A CN201280062345A CN104024635B CN 104024635 B CN104024635 B CN 104024635B CN 201280062345 A CN201280062345 A CN 201280062345A CN 104024635 B CN104024635 B CN 104024635B
- Authority
- CN
- China
- Prior art keywords
- pressure fuel
- seal
- pump
- hollow cylinder
- fuel pump
- 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.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 47
- 238000002347 injection Methods 0.000 title claims abstract description 6
- 239000007924 injection Substances 0.000 title claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000002788 crimping Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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 present invention relates to the high pressure fuel pump of a kind of fuel injection system, especially plug-in pump, in the combustion chamber injecting fuel into internal combustion engine, including the pump piston (1) that can perform straight reciprocating motion, and the first end (1.1) of described pump piston is directed in hollow cylinder (2), the second end (1.2) of described pump piston is supported on camshaft or eccentric shaft (4) indirectly via cup member (3).Described high pressure fuel pump also includes seal (5), described seal is preferably designed for bellows, and one end is fixed on described pump piston (1), the other end is fixed on hollow cylinder (2), is consequently formed annular space (6).According to the present invention, in order to seal described annular space (6), the guiding clearance (7) being formed between described pump piston (1) and hollow cylinder (2) is designed as annular gap and seals structure.And, described guiding clearance (7) is led in cannelure (8), described cannelure is formed in hollow cylinder (2), and described cannelure (8) is connected to leakage line (9) to lead back leaked out fuel.
Description
Technical field
The invention particularly relates to the high-pressure fuel pump of a kind of fuel injection system, described high-pressure fuel pump
It is configured to plug-in pump, in the combustion chamber injecting fuel into internal combustion engine.
Background technology
The high-pressure fuel pump of a kind of internal combustion engine is such as known from document DE 10 2,008 002 195 A1,
It is formed into plug-in pump.Described high-pressure fuel pump includes piston, and an end of described piston surpasses
Go out hollow cylinder, and reciprocated to the drive shaft being positioned in hollow cylinder by compression spring
Radial protrusion portion on, wherein this drive shaft is orientated around an axis.For separately fuel
And lubricating oil, especially for stoping fuel to penetrate in the fuel feeding inner chamber of internal combustion engine, this part of document carries
The end beyond hollow cylinder and the described hollow cylinder that go out described piston pass through bellows with liquid
The mode sealed connects, and 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 passed directly to described ring
In shape space.
The sylphon seal of the above-mentioned type belongs to the encapsulating method of contactless type.It has the drawback that leads
Cause internal combustion engine to stop rapidly.
Additionally, contact seal method known such as rod seal and metal sealing, constitute and leakage is had side
The annular gap helped.Along with Abgasgesetz day by day severe of motor-vehicle tail-gas, this leakage no longer can
Enough it is tolerated.
Summary of the invention
Thus departing from the foregoing prior art, the task of the present invention is to illustrate a kind of high-pressure fuel pump, especially
It is plug-in pump, ensures that reliable and stable fuel separates by it.
This is solved by a kind of high-pressure fuel pump with feature of present invention.
The high-pressure fuel pump of the fuel injection system that the present invention proposes, especially plug-in pump, it is used for
Inject fuel in the combustion chamber of internal combustion engine, including reciprocating pump piston, described pump piston
First end be directed in hollow cylinder, and the second end of described pump piston indirectly by
Cup member is supported on camshaft or eccentric shaft.Described high-pressure pump also includes being preferably configured as ripple
The seal of pipe, described is fixed on pump piston in side by the seal being preferably configured as bellows,
Then it is fixed on hollow cylinder at opposite side, thus constitutes annular space.In the present invention, in order to
Sealing described annular space, the guiding clearance constituted between described pump piston and hollow cylinder is by structure
Make and seal structure for annular gap.It is further proposed that described guiding clearance is led in cannelure, its
Described in cannelure be formed in described hollow cylinder, and be connected to leakage line with backflow let out
The fuel of leakage.The high-pressure pump of the present invention not only applies the encapsulating method of contactless type, also applies and connects
The encapsulating method of touch.The combination of both encapsulating methods is hereby it is ensured that particularly reliable medium separates.
Meanwhile, at encapsulating method, the feelings broken down especially with the contactless type encapsulating method of bellows
Under shape, because the sealing sealed by described annular gap is still guaranteed, internal combustion engine remains able to fortune
OK.Additionally, by the combination of two kinds of encapsulating methods, described it is preferably configured as the seal of bellows
Load also be able to reduce, thus seldom consider to break down.Because described annular gap seals and makes institute
Stating leakage line to depart from from described annular space, described annular space is by being preferably configured as the close of bellows
Sealing around, thus described annular space makes the pressure oscillation of described seal heavy load reduce.
Preferably, constituting another guiding clearance between described pump piston and hollow cylinder, this is led
It is configured to annular gap to gap and seals structure, and lead in described cannelure.Described another is led
Separated by the cannelure constituted in described hollow cylinder with described first guiding clearance to gap.
Thereby guarantee that the leakage flow flowed in described cannelure by another guiding clearance described passes through blow-by tube
Line is discharged, and do not arrive described by by be preferably configured as the seal of bellows institute around annular sky
Between, wherein said leakage line is connected in described cannelure.Avoid described annular empty by this way
Pressure oscillation between.The required length of two guiding clearances being configured to annular-gap seal
Degree l1And l2Can be determined by simulation.Preferably, length l of another guiding clearance described2It is chosen
For length l more than described first guiding clearance1。
According to a preferred embodiment of the invention, the seal being preferably constructed in bellows described in is fixed on
On the outer peripheral face of described pump piston.Make by this way by described seal around annular space
Volume minimizes.It is further preferred that utilize crimping ring to make described seal be fixed on pump piston.Institute
Stating crimping ring can make described seal be connected air-tightly on described pump piston.Alternatively or additionally,
Other fixture can be set.
The seal being preferably configured as bellows described in it is further proposed that is fixed on described hollow cylinder
On the outer peripheral face of body.It is particularly preferred that described fixing also utilizes crimping ring to realize, in order to draw simultaneously
Rise and be tightly connected.
According to the improvement project of the present invention, described in be preferably configured as the seal of bellows and be fixed on described
On the outer peripheral face of hollow cylinder, this outer peripheral 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 is positioned at pump piston
And between hollow cylinder, be configured to annular gap seal structure guiding clearance be extended.Excellent
Choosing is configured to the seal of bellows and is positioned near described pump piston by this way, thus described by
Described seal around the volume of annular space reduce further.The described bellows of being preferably configured as
Each fold of seal is also avoided by with direct contact of described pump piston, to improve described seal
Service life.The length of the described seal being preferably configured as bellows thus be chosen so that each
The open-angle of ripple is the least when pump piston moves back and forth.
In order to be preferably configured as the durability of the seal of bellows described in improving, and then improve it and use
In the life-span, it is the material using resistance that the present invention also proposes described seal, and especially plastics are made, wherein
Described plastics e.g. polytetrafluoroethylene (PTFE).
Accompanying drawing explanation
Below with reference to the accompanying drawings, the preferred embodiments of the present invention are described in detail, wherein:
Fig. 1 is the longitudinal sectional view of the high-pressure fuel pump being implemented as 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 in the region that bellows seal is fixed on hollow cylinder in Fig. 1；
Fig. 4 is the stereogram of bellows seal.
Detailed description of the invention
The plug-in pump that Fig. 1 shows includes pump piston 1, and the first end 1.1 of pump piston 1 is contained in
In the hollow cylinder 2 of cylinder cover, its second end 1.2 is supported on indirectly by cup member 3
On camshaft 4.The second end 1.2 constitutes piston base 17, and spring base 16 is positioned at piston base 17
On, wherein spring base 16 is used for accommodating spring 15.The spring force of spring 15 keeps cup member 3 He
Pump piston 1 contacts with camshaft 4.Spring 15 and cup member 3 are around hollow cylinder 2.
For sealing guiding clearance 7,10, pump piston 1 and hollow cylinder 2 are by being configured to ripple
The seal 5 of pipe connects.Seal 5 is fixed on the outer peripheral face 11 of pump piston 1 in side, separately
Side is fixed on the outer peripheral face 13 of neck ring 14, and wherein neck ring 14 is placed on hollow cylinder 2.This
A little fixing utilizes crimping ring 12 to carry out, and it is alive that crimping ring 12 makes seal 5 be connected air-tightly to pump
On plug 1 and hollow cylinder 2.The seal 5 being configured to bellows surrounds annular space 6, guides
Gap 7 is led in annular space 6.Guiding clearance 7 terminates in cannelure 8, and its intermediate annular groove 8 constructs
In hollow cylinder 2, and be connected in leakage line 9 so that by another guiding clearance 10 from
The leaked fuel backflow opened.Thereby guarantee that described leaked fuel does not arrive and annular space 6 causes pressure
Fluctuation, and then increase the weight of the load of seal 5.
As from shown in the section shown in Fig. 2, length l1And l2It is chosen to be l1<l2.Can be found out by simulation
Optimum length, optimum length here refers to ensure enough to seal so that medium separates.
The section of Fig. 3 shows that the seal 5 being configured to bellows utilizes crimping ring 12 to be fixed to sky
In the neck ring 14 of heart cylinder 12.In order to receive crimping ring 12, constitute axle at the two ends of seal 5
Ring 18 (seeing Fig. 4), axle ring 18 can install crimping ring 12.Axle ring 18 can also make seal 5
It is simply mounted on the outer peripheral face 11 of pump piston 1 and is placed on the neck ring on hollow cylinder 2
On the outer peripheral face 13 of 14.The position of axle ring 18 is here chosen to be so that the fold of described bellows
Keep spaced apart relative to pump piston 1.Meanwhile, the volume of annular space 6 is also reduced to minimum, with
Make undesirable volume of pumping minimize simultaneously.
Addedly pointing out, in addition to the bellows seal shown in Fig. 1-4, seal 5 also is able to realize
Membrane seal for other.
Claims (15)
1. a high-pressure fuel pump for fuel injection system, for injecting fuel into the combustion of internal combustion engine
Burn in room, including reciprocating pump piston (1), the first end (1.1) of described pump piston (1)
Being directed in hollow cylinder, its second end (1.2) is indirectly by cup-shape member (3)
Support is on camshaft or eccentric shaft (4), and described high-pressure fuel pump also includes a seal (5), institute
State seal (5) in the case of constituting annular space (6), be fixed on described pump piston (1) in side
Above and it is fixed on hollow cylinder (2) at opposite side, it is characterised in that
In order to seal described annular space (6), at described pump piston (1) and hollow cylinder (2)
Between the guiding clearance (7) that constitutes be embodied as annular gap and seal structure, and described guiding clearance (7)
Leading in cannelure (8), wherein said cannelure (8) constructs in described hollow cylinder (2)
And be connected to leakage line (9) so that leakage fuel return.
High-pressure fuel pump the most according to claim 1, it is characterised in that in described pump piston (1)
And constitute between hollow cylinder (2) and lead to another guiding clearance in described cannelure (8)
(10) it is embodied as annular gap and seals structure.
High-pressure fuel pump the most according to claim 1 and 2, it is characterised in that described seal
(5) it is fixed on the outer peripheral face (11) of described pump piston (1).
High-pressure fuel pump the most according to claim 1 and 2, it is characterised in that described seal
(5) it is fixed on the outer peripheral face (13) of described hollow cylinder (2).
High-pressure fuel pump the most according to claim 4, it is characterised in that described outer peripheral face (13)
Structure is in neck ring (14), and wherein said neck ring (14) is placed on described hollow cylinder (2).
High-pressure fuel pump the most according to claim 1 and 2, it is characterised in that described seal
(5) make with the material of resistance.
High-pressure fuel pump the most according to claim 1, it is characterised in that described high-pressure fuel pump
It it is plug-in pump.
High-pressure fuel pump the most according to claim 1, it is characterised in that described seal (5)
It is configured to bellows.
High-pressure fuel pump the most according to claim 3, it is characterised in that described seal (5)
It is configured to bellows.
High-pressure fuel pump the most according to claim 3, it is characterised in that described fixing utilization
Crimping ring (12) realizes.
11. high-pressure fuel pumps according to claim 4, it is characterised in that described seal (5)
It is configured to bellows.
12. high-pressure fuel pumps according to claim 4, it is characterised in that described fixing utilization
Crimping ring (12) realizes.
13. high-pressure fuel pumps according to claim 6, it is characterised in that described seal (5)
It is configured to bellows.
14. high-pressure fuel pumps according to claim 6, it is characterised in that the material of described resistance
Material is plastics.
15. high-pressure fuel pumps according to claim 14, it is characterised in that described plastics are poly-
Tetrafluoroethene.
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 CN104024635A (en) | 2014-09-03 |
| CN104024635B true 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) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013216983A1 (en) | 2013-08-27 | 2015-03-05 | Robert Bosch Gmbh | pump |
| IN2013DE03058A (en) | 2013-10-14 | 2015-04-17 | Continental Automotive Gmbh | |
| 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 |
| DE102014202340A1 (en) | 2014-02-10 | 2015-08-13 | Robert Bosch Gmbh | Pump for conveying a fluid |
| DE102014202338A1 (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 |
| DE102018204556B3 (en) * | 2018-03-26 | 2019-05-16 | Continental Automotive Gmbh | High-pressure fuel pump for a fuel injection system |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
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 CN CN201280062345.9A patent/CN104024635B/en not_active Expired - Fee Related
- 2012-12-27 WO PCT/EP2012/076918 patent/WO2013098301A1/en active Application Filing
- 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013098301A1 (en) | 2013-07-04 |
| IN2014DN03227A (en) | 2015-05-22 |
| EP2798210B1 (en) | 2017-05-24 |
| DE102011089967A1 (en) | 2013-06-27 |
| CN104024635A (en) | 2014-09-03 |
| EP2798210A1 (en) | 2014-11-05 |
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| 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 |