CN108979924A - High pressure fuel pump, high potential assembly and its plunger bushing - Google Patents
High pressure fuel pump, high potential assembly and its plunger bushing Download PDFInfo
- Publication number
- CN108979924A CN108979924A CN201710398172.2A CN201710398172A CN108979924A CN 108979924 A CN108979924 A CN 108979924A CN 201710398172 A CN201710398172 A CN 201710398172A CN 108979924 A CN108979924 A CN 108979924A
- Authority
- CN
- China
- Prior art keywords
- oil
- plunger
- valve
- container
- plunger bushing
- 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.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims description 35
- 239000003921 oil Substances 0.000 claims abstract description 64
- 239000000295 fuel oil Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000002828 fuel tank Substances 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A kind of high potential assembly of the present invention, including plunger bushing, plunger, inlet valve, and sealing ring, there is plunger cavity and valve chamber in the plunger bushing, the inlet valve is set in the valve chamber, there is oil suction chamber between the end of the inlet valve and the valve chamber, the plunger is set in the plunger cavity, the plunger bushing is recessed inwardly to form container in plunger cavity position, sealing ring is provided in the container, wherein the oil inlet passage that fuel oil is inputted to the oil suction chamber is offered on the plunger bushing, it is connected to an Oil Guide channel of the oil suction chamber and the container, and fuel oil is exported to the drain path of the container.Using high potential assembly of the present invention, can effectively cool down to receiving slot part.
Description
Technical field
The application especially uses sealing ring in relation to a kind of in relation to a kind of high pressure fuel pump, high potential assembly and its plunger bushing
High pressure fuel pump, high potential assembly and its plunger bushing.
Background technique
High pressure fuel pump is widely used in fuel supply field, and high pressure fuel pump generally comprises pump case, is set to pump case
Low pressure components and high potential assembly.Fuel oil is inputted high potential assembly from fuel tank by low pressure components, and high potential assembly exports after fuel oil pressurizes.
High potential assembly generally comprises plunger bushing, and the plunger being set in the plunger cavity of plunger bushing is set to the valve of plunger bushing
Intracavitary inlet valve and it is set to valve holder of the inlet valve top to fixed inlet valve.Have on valve holder
Hydraulic fluid port exports high pressure fuel.Plunger moves back and forth in plunger bushing, so that fuel oil be pressurizeed.However in the mistake of reciprocating motion
Cheng Zhong is easy to make gap of the fuel oil in upper end between plunger and plunger bushing to move down, into being set to plunger
The lubricant reservoir of lower part is covered, to cause the lubricating oil dilution in lubricant reservoir, reduces lubricating ability.In addition, lubricating oil also has
It may move upwards in gap of the self-lubricating oil pocket equally between plunger and plunger bushing in the long-term use process, cause fuel oil
In be mixed into lubricating oil, high pressure fuel pump can be damaged.
For this purpose, offering container in plunger cavity, and sealing ring is set, fuel oil and lubricating oil is isolated.But this
Sealing ring is caused to generate the situation of overheat during rubbing for a long time with plunger.New structure setting is needed to improve high pressure fuel
Pump.
Summary of the invention
The purpose of the present invention is to provide a kind of high pressure fuel pump, high potential assembly and its plunger bushings, to solve sealing ring
With problems of excessive heat caused by plunger friction.
The present invention provides a kind of high potential assembly, including plunger bushing, plunger, inlet valve and sealing ring, tool in the plunger bushing
There are plunger cavity and valve chamber, the inlet valve is set in the valve chamber, is had between the end of the inlet valve and the valve chamber
Oil suction chamber, the plunger are set in the plunger cavity, and the plunger bushing is recessed inwardly to form container in plunger cavity position, institute
It states and is provided with sealing ring in container, wherein the oil inlet passage that fuel oil is inputted to the oil suction chamber is offered on the plunger bushing,
It is connected to an Oil Guide channel of the oil suction chamber and the container, and fuel oil is exported to the drain path of the container.
The present invention also provides a kind of high pressure fuel pumps, wherein accommodating chamber is provided on the pump case of the high pressure fuel pump, institute
It states and is provided with high potential assembly as described above on accommodating chamber.
The present invention additionally provides a kind of plunger bushings, wherein being provided with plunger cavity and valve chamber in the plunger bushing, and described
Offer container fuel oil inputted in the oil inlet passage, the connection valve chamber and the plunger cavity of the valve chamber in plunger bushing
Oil Guide channel, and fuel oil is exported to a drain path 4 of the container.
Oil Guide channel is provided in plunger bushing of the invention, so that the fuel oil of low temperature enters in container, it can be to sealing
Loop section cools down.
Detailed description of the invention
Exemplary embodiment of the present invention is described in detail below with reference to the accompanying drawings, it should be understood that described below
The examples are only for explaining the invention, without being restricted to the scope of the present invention, appended attached drawing wherein:
Fig. 1 is the topology view of one embodiment of high potential assembly of the present invention.
Fig. 2 is the topology view of one embodiment of plunger bushing of the present invention.
Fig. 3 is the topology view of one embodiment of high pressure fuel pump of the present invention.
Fig. 4 is high pressure fuel pump of the invention using block diagram, to show that high pressure fuel pump work in use is former
Reason.
Specific embodiment
In different drawings, the same or similar component is presented with like reference characters.
It should be appreciated that attached drawing is only used for, the present invention will be described, wherein the size, proportionate relationship of component and component
Number is not as limitation of the present invention.
As shown in Figs.1 and 2, for high potential assembly 100 and plunger bushing 10 of the invention one embodiment knot
Structure view.High potential assembly 100 includes plunger bushing 10, and interconnected plunger cavity 12 and valve chamber 13 are offered in plunger bushing 10.
Plunger 20 is provided in plunger cavity 12, plunger 20 can move back and forth in plunger cavity 12.Inlet valve 30 and valve holder 40
Be all set in valve chamber 13, and valve holder 40 is set on inlet valve 30, valve holder 40 carried out with plunger bushing 10 it is affixed,
In the present embodiment, both sides pass through screw connection.Valve holder 40 is pressed on inlet valve 30, so that inlet valve 30 is in valve chamber 13
Position is fixed.In the present embodiment, valve holder 40 integrates delivery valve function, and certainly in other embodiments, delivery valve can
To be separately provided.Oil outlet 41 is offered on valve holder 40, to export high pressure fuel.The peripheral part of inlet valve 30 to
Sunken inside, to form oil suction chamber 31 between inlet valve 30 and valve chamber 13.Low-voltage fuel enters in oil suction chamber 31 from extraneous.
It is recessed inwardly to form container 102 in 12 inner part of plunger cavity on plunger bushing 10, can be set in container 102 close
Seal ring 50, in plunger 20 when moving back and forth in plunger cavity 12, which can provide sealing, prevent the fuel oil from top
It is mixed with the lubricating oil from lower section.Oil inlet passage 101 is offered on plunger bushing 10, the oil inlet passage 101 and 31 phase of oil suction chamber
Even, it is imported to low-voltage fuel.One Oil Guide channel 103 is set between oil suction chamber 31 and container 102, and one end is connected to valve chamber
13 bottom end face, the other end are connected to the top of container 102, accommodate so as to import low-voltage fuel from oil suction chamber 31
In slot 102, cool down to 102 position of container, sealing ring 50 and plunger 20.There is Oil Guide valve opening on the Oil Guide channel 103
105, the sectional area of the Oil Guide valve opening 105 is less than the sectional area of 103 other parts of Oil Guide channel, passes through setting for Oil Guide valve opening 105
It sets and can control the oil mass for importing and cooling down in container 102.It is also provided with drain path 104 on plunger bushing 10, connects
The container 102 is passed through, so that the fuel oil for being transmitted to 102 position of container from Oil Guide channel 103 be exported.
It please refers to shown in Fig. 3, is the topology view of one embodiment of high pressure fuel pump 1 of the present invention.High pressure fuel pump 1
With pump case 2, accommodating chamber 3 is offered on pump case 2, high potential assembly 100 above-mentioned is set in pump case 2 from the accommodating chamber 3.
Oil inlet 4 is provided on pump case 2, for connecting the oil inlet passage 101 and an oil feed pump 6, the oil feed pump provides low
Compression ignition oil is to high potential assembly.And drain tap 5 is provided on pump case 2 to be connected to the drain path 104 and a fuel tank 7, from
And the fuel oil for completing temperature-fall period is returned into fuel tank.
It is the working principle diagram of one embodiment of high pressure fuel pump 1 of the present invention please refer to shown in Fig. 3 and Fig. 4.
In the present embodiment, high pressure fuel pump 1 includes oil feed pump 6 and high potential assembly 100.Oil feed pump 6, will from pumps fuel in fuel tank 7
The oil inlet passage 101 that high potential assembly 100 is fed from the oil inlet 4 of pump case 2, therefore oil suction chamber 31 is full of fuel oil, and have
Certain pressure.Fuel oil part at oil suction chamber 31 is pressurizeed by inlet valve 30, forms high pressure fuel, and another part passes through Oil Guide
Channel 103 imports container 102, cools down to sealing ring 50 and plunger 20.After being cooled down, the part fuel oil,
Enter drain tap through drain path 104 including entering the fuel oil in container 102 from the gap between plunger 20 and plunger cavity 12
5, and fuel tank 7 is eventually entered into, carry out next circulation.In other embodiments, it can be led from the fuel oil that drain tap 5 leaks out
Enter other parts, such as the front end of oil feed pump etc..By the setting of Oil Guide valve opening 105, the stream into container 102 can be can control
Amount.In addition, in traditional high pressure fuel pump, though after fuel metering unit stops working, still suffer from the fuel oil of part into
Enter high potential assembly.To solve this problem it is necessary to be arranged on fuel gallery individual valve carry out this part is undesirable
Fuel oil export, makes that structure is complicated.Using plunger bushing of the invention, high potential assembly and high pressure fuel pump because Oil Guide channel 103 and
The presence of Oil Guide valve opening 105, the valve being separately provided no longer need.
Only in conjunction with the most practical preferred embodiment being presently considered, present invention is described above, it is to be understood that
The above description is not a limitation of the present invention, and the present invention is also not limited to the example above, the ordinary skill people of the art
The variations, modifications, additions or substitutions that member is made within the essential scope of the present invention, also should belong to protection scope of the present invention.
Claims (10)
1. a kind of high potential assembly (100), including plunger bushing (10), plunger (20), inlet valve (30) and sealing ring (50), described
There is plunger cavity (12) and valve chamber (13), the inlet valve (30) is set in the valve chamber (13), described in plunger bushing (10)
There are oil suction chamber (31) between the end and the valve chamber (13) of inlet valve (30), the plunger (20) is set to the plunger cavity
(12) in, the plunger bushing (10) is recessed inwardly to be formed container (102) in plunger cavity (12) position, the container (102)
Inside it is provided with sealing ring (50), it is characterised in that: offer on the plunger bushing (10) and fuel oil is inputted into the oil suction chamber (31)
Oil inlet passage (101), be connected to an Oil Guide channel (103) of the oil suction chamber (31) and the container (102), and by fuel oil
Export the drain path (104) of the container (102).
2. high potential assembly (100) as described in claim 1, which is characterized in that the Oil Guide channel (103) is provided with sectional area
Less than the Oil Guide valve opening (105) of Oil Guide channel (103) other parts.
3. high potential assembly (100) as claimed in claim 1 or 2, which is characterized in that the Oil Guide channel (103) is connected to institute
State the top of container (102).
4. high potential assembly (100) as claimed in claim 1 or 2, which is characterized in that the high potential assembly (100) is further wrapped
It includes valve holder (40), the valve holder (40) is set in the valve chamber (13), is fixedly connected on the valve chamber (13) simultaneously
It presses on the inlet valve (30), and is provided with oil outlet (41) to high pressure fuel is defeated on the valve holder (40)
Out.
5. a kind of high pressure fuel pump (1), which is characterized in that be provided with accommodating chamber on the pump case (2) of the high pressure fuel pump (1)
(3), it is arranged on the accommodating chamber (3) just like the described in any item high potential assemblies of Claims 1-4 (100).
6. high pressure fuel pump (1) as claimed in claim 5, which is characterized in that be provided with oil inlet (4) on the pump case (2)
For connecting the oil inlet passage (101) and an oil feed pump (6).
7. high pressure fuel pump (1) as claimed in claim 5, which is characterized in that be provided with drain tap (5) on the pump case (2)
To be connected to the drain path (104) and a fuel tank (7).
8. a kind of plunger bushing (10), which is characterized in that it is provided with plunger cavity (12) and valve chamber (13) in the plunger bushing (10), and
Oil inlet passage (101), the connection valve chamber that fuel oil is inputted to the valve chamber (13) are offered in the plunger bushing (10)
(13) the Oil Guide channel (103) of the container (102) and in the plunger cavity (12), and fuel oil is exported into the container
(102) a drain path (104).
9. plunger bushing (10) as claimed in claim 8, which is characterized in that it is small that the Oil Guide channel (103) is provided with sectional area
In the Oil Guide valve opening (105) of Oil Guide channel (103) other parts.
10. plunger bushing (10) as claimed in claim 8 or 9, which is characterized in that described Oil Guide channel (103) one end is connected to
Valve chamber (13) the bottom end side, the other end are connected to the container (102) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398172.2A CN108979924A (en) | 2017-05-31 | 2017-05-31 | High pressure fuel pump, high potential assembly and its plunger bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710398172.2A CN108979924A (en) | 2017-05-31 | 2017-05-31 | High pressure fuel pump, high potential assembly and its plunger bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108979924A true CN108979924A (en) | 2018-12-11 |
Family
ID=64501528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710398172.2A Withdrawn CN108979924A (en) | 2017-05-31 | 2017-05-31 | High pressure fuel pump, high potential assembly and its plunger bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108979924A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553059A (en) * | 1983-11-10 | 1985-11-12 | Nippon Soken, Inc. | Piezoelectric actuator and a piezoelectric pump injector incorporating the same |
| JPH08218975A (en) * | 1995-02-09 | 1996-08-27 | Toyota Motor Corp | Fuel supply device for diesel engine |
| CN102341592A (en) * | 2009-03-05 | 2012-02-01 | 康明斯知识产权有限公司 | High pressure fuel pump with parallel cooling fuel flow |
| CN203548177U (en) * | 2013-07-18 | 2014-04-16 | 佛山市科达液压机械有限公司 | Novel hydraulic pump cooling structure |
| DE102013219284A1 (en) * | 2013-09-25 | 2015-03-26 | Robert Bosch Gmbh | Pump, in particular high-pressure fuel pump for a fuel injection device of an internal combustion engine |
-
2017
- 2017-05-31 CN CN201710398172.2A patent/CN108979924A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553059A (en) * | 1983-11-10 | 1985-11-12 | Nippon Soken, Inc. | Piezoelectric actuator and a piezoelectric pump injector incorporating the same |
| JPH08218975A (en) * | 1995-02-09 | 1996-08-27 | Toyota Motor Corp | Fuel supply device for diesel engine |
| CN102341592A (en) * | 2009-03-05 | 2012-02-01 | 康明斯知识产权有限公司 | High pressure fuel pump with parallel cooling fuel flow |
| CN203548177U (en) * | 2013-07-18 | 2014-04-16 | 佛山市科达液压机械有限公司 | Novel hydraulic pump cooling structure |
| DE102013219284A1 (en) * | 2013-09-25 | 2015-03-26 | Robert Bosch Gmbh | Pump, in particular high-pressure fuel pump for a fuel injection device of an internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181211 |