CN105909438A - Fuel filter in a fuel injection system - Google Patents
Fuel filter in a fuel injection system Download PDFInfo
- Publication number
- CN105909438A CN105909438A CN201610216269.2A CN201610216269A CN105909438A CN 105909438 A CN105909438 A CN 105909438A CN 201610216269 A CN201610216269 A CN 201610216269A CN 105909438 A CN105909438 A CN 105909438A
- Authority
- CN
- China
- Prior art keywords
- fuel
- filter
- fuel filter
- passage
- injection system
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 110
- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- 239000002828 fuel tank Substances 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 208000003351 Melanosis Diseases 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
Classifications
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- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/54—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by air purging means
Abstract
The invention provides a fuel filter in a fuel injection system. The fuel filter (200) is positioned downstream of a fuel tank (100) and upstream of a high pressure pump (104). The fuel filter comprises at least one dirt side (201) and a clean side (203) and has a vent hole (202) which is fluidically connected to the dirt side (201). The vent hole (202) restores a path for the flow of air and fuel from the dirty side (201) of the fuel filter to the fuel tank (100).
Description
Technical field
The present invention relates to the field of fuel filter in fuel injection system.
Background technology
In order to realize effective work of fuel injection system, need to receive the track energy of fuel under high pressure from high-pressure pump
Enough not by air impact.In fuel, the existence of air can cause pressure oscillation thus and then affect the combustion of fuel
Burn.In existing current fuel injection system, at air present in fuel by being present in high-pressure pump
Reflux inlet discharge.Due to high-pressure pump oil lubrication, it is therefore possible to oil can be produced along with air stream
Move and return in case.This can cause fuel " melanism ".Additionally, when the sky being present in fuel injection system
When the volume of gas is the highest, especially when vehicle starts for the first time in the factory, stood reflux inlet
Load will be the highest, and this can make fully to remove air from fuel injection system and become difficulty.Therefore,
The air that will be present in before fuel arrives the entrance of high-pressure pump in fuel-air mixing is needed to discharge, so that
The pressure oscillation in common rail must be avoided.
Prior art patent application WO-1990011444 discloses a kind of fuel supply for diesel engine and returns
The breather on road, its objective is the air in fuel supply loop to remove without loosening air relief cock.
Breather includes that fuel filter, strainer cover, pipe jointing part and breather, described fuel filter set
Put more higher position than fuel-injection pump；Described strainer cover be arranged on fuel filter upper part and
There is the ventilation holes connected with fuel outlet；Described pipe jointing part can be at strainer cover and ventilation holes
Threaded and to have diameter little to the aperture of fuel injection amount being not enough to hinder fuel-injection pump；Described
Breather is connected at one end to pipe jointing part and connects with fuel tank at the other end.
Accompanying drawing explanation
Disclose in detail the different models of the present invention in the de-scription, and explaination be in the accompanying drawings:
Fig. 1 illustrates fuel injection system；
Fig. 2 illustrates the fuel filter in fuel injection system.
Detailed description of the invention
Fig. 1 illustrates fuel injection system.Fuel injection system includes the fuel with electronic supply pump 102
Case 100, fuel filter 200, high-pressure pump 104, common rail 106 and ejector 108.A series of supply pipes
Line is connected to all parts of fuel injection system to realize the efficient conveying of fuel.From fuel tank 100
Fuel passes fuel filter 200 and arrives the entrance of high-pressure pump 104, pressurized at fuel herein.Pressurization
After fuel be sent to common rail 106 from high-pressure pump 104 with for being sprayed by ejector.Fuel injection systems
The parts of system are controlled by electronic control unit (ECU).Fuel injection system includes low tension loop and high pressure
Loop.The loop part in high-pressure pump 104 downstream is high tension loop, and loop is in the portion of high-pressure pump 104 upstream
Dividing is low tension loop.Low tension loop including the fuel filter 200 proposed now will the most specifically
Bright.
Low tension loop includes having the fuel tank 100 of electronic supply pump 102, have passage (vent hole)
202 and return to the fuel filter 200 of return line 103 and the high-pressure pump 104 of fuel tank 100.
Fuel filter 200 receives the fuel from fuel tank 100.Fuel filter 200 has passage 202,
It is in fluid communication with dirt side (dirt side) 201, establishes and makes air and fuel stream from fuel filter 200
Dirt side 201 return to the path of fuel tank.Fuel filter 200 can include air, and needs logical
Cross passage 202 to discharge it from fuel filter 200 to stop air flow along with fuel and arrive
In high-pressure pump 104.When fill it up with start vehicle after empty fuel tank 100 time or in the factory first
During secondary startup, air is normally present.Fuel filter 200 including the passage 202 proposed is existing
Will be explained in further detail.
Fig. 2 illustrates the fuel filter 200 in fuel injection system.Fuel filter 200 is positioned at fuel
The downstream of case 100 and the upstream of high-pressure pump 104.Fuel filter 200 at least includes dirt side 201 He
Clean side (clean side) 203, also has and the passage 202 of dirt side 201 fluid communication.Passage
202 foundation make air and fuel stream return to the road of fuel tank 100 from the dirt side 201 of fuel filter 200
Footpath.Passage 202 has cross section, and this cross section is to take turns selected from least one included in the group with lower opening profile
Wide: such as taper, cylindricality, square, rectangle, triangle, tetragon, trapezoidal etc..A reality
Executing in example, hole can have the profile of the diameter so that the different piece in hole with change.There is diameter change
Main purpose is the throttling function guaranteeing air and fuel by producing the limiting channel of fuel and air stream.
The dirt side 201 of fuel filter 200 has entrance 204, and it receives from fuel tank 100 not
The fuel filtered.In fuel injection system, enter the fuel not filtered in fuel tank 100 permissible
Use following flow path.First, fuel can be filtered by filter cell, and the fuel after filtration leads to
Cross clean side 203 and lead to the outlet 206 of fuel filter 200 to reach high-pressure pump 104.At fuel filter
200 or guide the air that is acquired in the flowline of fuel filter 200 and can flow through now setting
Passage 202 on dirt side 201, returns it to fuel tank 100.By this layout, now may be used
The air in fuel injection system can be eliminated before fuel reaches high-pressure pump 104.Owing to arriving high-pressure pump
The fuel of 104 does not contains any air, therefore returns the reflux inlet of fuel tank 100 from high-pressure pump 104 and the most just may be used
To eliminate.
When the metering units supplying fuel to high-pressure pump 104 need not any additional fuel quantity to arrive high pressure
During pump 104, fuel flows through second flow path.The fuel requirement of currently available any excess can
It is sent back in fuel tank 100.This process is realized by zero delivery choke valve.It is arranged on fuel filter
Passage 202 on device 200 can act as a throttle valve now, with will be from fuel filter 200
The excess of fuel of self is removed.In one embodiment, passage 202 is provided with the lid with opening.If
Put the opening covering to align with passage.In one embodiment, lid can have different geometries,
Opening has the cross section of standard simultaneously.In another embodiment, it is positioned at the opening covered and also can have difference
Geometric cross section.
The above-mentioned structure that passage 202 introduces fuel filter 200 enables to fuel filter 200
Also perform the following functions in addition to fuel is filtered: a) air from fuel filter 200 and is led
Discharge in the feed-line of fuel filter 200, b) be used as zero delivery choke valve to stop excess of fuel to reach
To high-pressure pump 104.Above-mentioned fuel filter 200 can be also used in fuel lubricated pump.Feelings at fuel lubricated pump
In shape, control is used for the fuel flowing of the lubrication of high pressure pump assembly by the choke valve at high pressure pump inlet.
It should be understood that the type of the passage being just arranged on fuel filter and profile and at fuel
For the position of the passage on filter, the embodiment explained in the foregoing description is only schematically,
And the scope of the present invention can not be limited.Repairing of many such embodiments and the embodiment explained in the de-scription
Change and change is predictable.The scope of the present invention is only limited by the scope of claim.
Claims (5)
1. the fuel filter (200) in a fuel injection system,
Described fuel filter (200) is positioned at the downstream of fuel tank (100) and the upper of high-pressure pump (104)
Trip, described fuel filter at least includes dirt side (201) and clean side (203), it is characterised in that
Described fuel filter (200) has the passage (202) being in fluid communication with described dirt side (201),
Described passage (202) is set up and is made air and the fuel stream described dirt side (201) from described fuel filter
Return to the path of described fuel tank (100).
2. fuel filter (200) as claimed in claim 1, wherein, described passage (202) has
Having is the cross section profile selected from least one profile included in the group with lower opening profile: such as taper, cylindricality,
Square, rectangle, triangle, tetragon, trapezoidal etc..
3. fuel filter (200) as claimed in claim 2, wherein, described hole has so that described hole
Different piece there is the profile of diameter of change.
4. fuel filter (200) as claimed in claim 1, wherein, described passage (202) sets
It is equipped with the lid with opening.
5. a low tension loop for fuel injection system, described low tension loop includes:
There is the fuel tank (100) of electronic supply pump；
There is passage (202) and return to the fuel of return line (103) of described fuel tank (100)
Filter (200)；With
High-pressure pump (104),
Described fuel filter has the passage (202) being in fluid communication with described dirt side (201), described
Passage (202) is set up and is made air and fuel stream return from the described dirt side (201) of described fuel filter
Return to the path of described fuel tank (100).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN291CH2015 | 2015-01-20 | ||
| IN291/CHE/2015 | 2015-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105909438A true CN105909438A (en) | 2016-08-31 |
Family
ID=56744796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610216269.2A Pending CN105909438A (en) | 2015-01-20 | 2016-01-19 | Fuel filter in a fuel injection system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105909438A (en) |
| DE (1) | DE102016200421A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990011444A1 (en) | 1989-03-29 | 1990-10-04 | Kabushiki Kaisha Komatsu Seisakusho | Air vent apparatus for a fuel supply circuit |
-
2016
- 2016-01-15 DE DE102016200421.2A patent/DE102016200421A1/en active Pending
- 2016-01-19 CN CN201610216269.2A patent/CN105909438A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016200421A1 (en) | 2016-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160831 |