CN105863862A - Oil injector, common-rail oil injection system and oil injection method - Google Patents
Oil injector, common-rail oil injection system and oil injection method Download PDFInfo
- Publication number
- CN105863862A CN105863862A CN201610257719.2A CN201610257719A CN105863862A CN 105863862 A CN105863862 A CN 105863862A CN 201610257719 A CN201610257719 A CN 201610257719A CN 105863862 A CN105863862 A CN 105863862A
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- China
- Prior art keywords
- oil
- switch valve
- signal
- judge module
- injection
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the technical field of engine oil injection and provides an oil injector, a common-rail oil injection system and an oil injection method. The oil injector comprises a first oil way passage and a second oil way passage connected in parallel; a first common end of the first oil way passage and the second oil way passage is connected with a common-rail pipe, and a second common end of the first oil way passage and the second oil way passage is connected with an oil injection port; a first switch valve is arranged on the first oil way passage; a pressure reduction valve and a second switch valve are arranged on the second oil way passage; and the first switch valve and the second switch valve are both connected with a controller. According to the scheme, by designing the two oil way passages, oil injection pressure is regulated. When rear injection is adopted, the second oil way passage is used for oil injection, the pressure reduction valve on the second oil way passage is used for reducing the oil injection pressure, it is avoided that high-injection-pressure diesel oil scours the cylinder wall and a lubricating oil membrane is taken away, and therefore an engine is effectively protected and the cylinder pulling risk is reduced. Besides, the oil injector can also control the oil injection pressure of pre-injection, and therefore the oil injection rule changes, the combustion efficiency is improved, and oil consumption is reduced.
Description
Technical field
The present invention relates to electromotor oil spout technical field, particularly relate to a kind of fuel injector, common rail spray
Oil system and fuel injecting method.
Background technology
Electromotor faces the challenge that Abgasgesetz constantly adds sternly and emission limit constantly reduces.Along with
Adding of Abgasgesetz is tight, needs to use grain catcher to reduce granular material discharged further.
As a example by diesel engine, spirt row grain catcher Regeneration control after employing, due to fuel injector
It is fixing in a certain operating point rail pressure, namely after fuel injector, sprays the pressure one of power and main jet
Sample.The problem thus brought is, high injection pressure diesel oil during rear spray is sprayed onto on casing wall, can make
Become oil dilution.Easily cause oil dilution.And machine oil can destroy machine oil and use after diluting
Performance, reduces kinematic viscosity, diesel-vessel breakdovvn；Also result in engine oil pressure time serious to decline,
Parts afunction, engine reliability declines.
Summary of the invention
(1) to solve the technical problem that
The technical problem to be solved in the present invention is just to provide a kind of adjustable oil spout of injection pressure
Device and co-rail oil injection system.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of fuel injector, including parallel connection
First asphalt channel and the second asphalt channel, and controller；Described first asphalt channel and institute
The first common port stating the second asphalt channel connects common rail pipe, and the second common port connects jet；
It is provided with the first switch valve on described first asphalt channel, described second asphalt channel is provided with
Air relief valve and second switch valve, described first switch valve, second switch valve all with described controller
Connect；Described controller includes the first judge module, the second judge module and signal transmitting module；
Described first judge module is for judging the operating mode of grain catcher, and described second judge module is used
In judging oil spout opportunity, and described first judge module, described second judge module all will determine that
Data are sent to described signal transmitting module；Described signal transmitting module is according to described judgement data
Control signal is sent to described first switch valve and second switch valve.
Preferably, described controller is automobile specified microcomputerized controller.
Preferably, described first switch valve is high-pressure solenoid valve, and described second switch valve is low pressure
Electromagnetic valve.
The present invention also provides for a kind of co-rail oil injection system, including above-mentioned fuel injector.
The present invention also provides for the fuel injecting method of a kind of co-rail oil injection system, comprises the following steps:
S1, judged the operating mode of grain catcher by the first judge module, when it is in regeneration work
Enter S2 during condition, otherwise enter S3；
S2, judged oil spout opportunity by the second judge module:
During main jet, signal transmitting module sends to the first switch valve and opens signal, to second switch
Valve sends shutdown signal；
During rear spray, signal transmitting module sends shutdown signal to the first switch valve, to second switch
Valve sends opens signal；
S3, judged oil spout opportunity by the second judge module:
During main jet, signal transmitting module sends to the first switch valve and opens signal, to second switch
Valve sends shutdown signal；
When spraying in advance, signal transmitting module sends shutdown signal to the first switch valve, to second switch
Valve sends opens signal.
(3) beneficial effect
Technical scheme has the advantages that the fuel injector of the present invention, including also
First asphalt channel of connection and the second asphalt channel；Described first asphalt channel and the second oil circuit lead to
First common port in road connects common rail pipe, and the second common port connects jet；Described first oil circuit
It is provided with the first switch valve on passage, described second asphalt channel is provided with air relief valve and second
Switch valve, described first switch valve, second switch valve are all connected with controller；Described controller
Including the first judge module, the second judge module and signal transmitting module；Described first judges mould
Block is for judging the operating mode of grain catcher, when described second judge module is used for judging oil spout
Machine, and described first judge module, described second judge module all will determine that data are sent to institute
State signal transmitting module；Described signal transmitting module is opened to described first according to described judgement data
Close valve and second switch valve sends control signal.The program is come real by design two-way asphalt channel
The regulation of existing injection pressure.When spray after using, by the second asphalt channel oil spout, and pass through
Air relief valve on this asphalt channel reduces injection pressure, it is to avoid high injection pressure diesel oil washes away cylinder
Cornice walks lubricating oil film, thus is effectively protected electromotor and reduces the risk of scuffing of cylinder bore.Additionally,
This fuel injector can also control the injection pressure sprayed in advance, thus realizes fuel injection characteristic change, improves
Efficiency of combustion reduces oil consumption.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, under
The accompanying drawing used required in embodiment or description of the prior art will be briefly described by face,
It should be evident that the accompanying drawing in describing below is only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the fuel injector of the application；
Fig. 2 is the operation principle schematic flow sheet of the fuel injector of the application；
In figure: 1, the first asphalt channel；2, the second asphalt channel；3, the first switch valve；4、
Second switch valve；5, air relief valve.
Detailed description of the invention
Make to retouch the most in detail to embodiments of the present invention with embodiment below in conjunction with the accompanying drawings
State.Following example are used for illustrating the present invention, but can not be used for limiting the scope of the present invention.
In describing the invention, " " center ", " longitudinally ", " horizontal it should be noted that term
To ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ",
Orientation or the position relationship of the instruction such as " end ", " interior ", " outward " are based on orientation shown in the drawings
Or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
Show that device or the element of indication must have specific orientation, with specific azimuth configuration and behaviour
Make, be therefore not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited,
Term " is connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is possible to
Being to removably connect, or it is integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；
Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
Referring to Fig. 1, the fuel injector of the present embodiment, including the first in parallel asphalt channel 1 and the
Two asphalt channels 2, and controller.Wherein, described first asphalt channel 1 and the second oil circuit lead to
First common port in road 2 connects common rail pipe, and accesses hydraulic oil from common rail pipe.First oil circuit
Second common port of passage 1 and the second asphalt channel 2 connects jet, and ejects from jet
Oil.
Wherein, the first asphalt channel 1 and the second asphalt channel 2 can also connect an oil spout respectively
Mouthful, thus need to arrange multiple jet on fuel injector.
In the present embodiment, in order to control the oil pressure ejected from jet, at the first asphalt channel
It is provided with the first switch valve 3 on 1, the second asphalt channel 2 is provided with air relief valve 5 and second switch
Valve 4.Wherein, the first switch valve 3, second switch valve 4 are all connected with controller mentioned above.
Obviously, what the first asphalt channel 1 passed through is the hydraulic oil being directly accessed from common rail pipe,
Therefore it is high-pressure oil passage.And owing to being provided with air relief valve 5 on the second asphalt channel 2, from common rail
The hydraulic oil that pipe accesses becomes low pressure oil after this air relief valve 5, therefore the second asphalt channel 2
For low pressure oil way.On this basis, the first switch valve 3 and second switch is controlled by controller
The break-make of valve 4, and then realize control while fuel injector internal high pressure and low pressure fuel injector.
Wherein, controller includes the first judge module, the second judge module and signal transmitting module.
Described first judge module is for judging the operating mode of grain catcher, and described second judge module is used
In judging oil spout opportunity, and described first judge module, described second judge module all will determine that
Data are sent to signal transmitting module.Comprehensive first judge module of signal transmitting module and second is sentenced
The judgement data of disconnected module, and send control letter to described first switch valve 3 and second switch valve 4
Number.
The program realizes the regulation of injection pressure by design two-way asphalt channel.After using
During spray, by the second asphalt channel 2 oil spout, and reduced by the air relief valve 5 on this asphalt channel
Injection pressure, it is to avoid high injection pressure diesel oil washes away cylinder wall and takes away lubricating oil film, thus effectively
Protection electromotor and reduce the risk of scuffing of cylinder bore.Additionally, what this fuel injector can also control to spray in advance
Injection pressure, thus realize fuel injection characteristic change, improve efficiency of combustion and reduce oil consumption.
In the present embodiment, controller preferably employs automobile specified microcomputerized controller.
Additionally, the first switch valve 3 is preferably high-pressure solenoid valve, second switch valve 4 is preferably low pressure
Electromagnetic valve.Certainly, the first switch valve 3 and second switch valve 4 are not limited in the present embodiment enumerate
Situation, it can also use the kind of the switch valve disclosed in any technology, as long as can be real
The break-make of existing asphalt channel.
The present embodiment also provides for a kind of co-rail oil injection system, including above-mentioned fuel injector.
Use above-mentioned co-rail oil injection system to carry out oil spout, refer to Fig. 2, comprise the following steps:
S1, judged the operating mode of grain catcher by the first judge module, when it is in regeneration work
Enter S2 during condition, otherwise enter S3；
S2, judged oil spout opportunity by the second judge module:
During main jet, signal transmitting module sends to the first switch valve 3 and opens signal, opens to second
Close valve 4 and send shutdown signal；
During rear spray, signal transmitting module sends shutdown signal to the first switch valve 3, opens to second
Close valve 4 and send unlatching signal；
S3, judged oil spout opportunity by the second judge module:
During main jet, signal transmitting module sends to the first switch valve 3 and opens signal, opens to second
Close valve 4 and send shutdown signal；
When spraying in advance, signal transmitting module sends shutdown signal to the first switch valve 3, opens to second
Close valve 4 and send unlatching signal.
Wherein, the first judge module judges the operating mode of grain catcher.When grain catcher is in
During regeneration regime, spirt row grain catcher regeneration after needing periodically to use.Now, adopt
Judge oil spout opportunity, generally namely according in cylinder to live with the second judge module
Plug stroke judge be currently at main jet or after spray period.Main jet and rear spray to realize different combustions
Oil pressure controls, and needs to disconnect the break-make with second switch valve 4 by the first switch valve 3 and comes real
Existing.Specifically:
During main jet, controlling the first switch valve 3 and turn on, second switch valve 4 disconnects, high rail pressure fuel oil
Entered in cylinder by the first asphalt channel 1；
During rear spray, controlling the first switch valve 3 and disconnect, second switch valve 4 turns on, high rail pressure fuel oil
Entered in cylinder by the second asphalt channel 2.The second oil circuit is entered at high rail pressure fuel oil
During passage 2, fuel oil reduces through air relief valve 5 pressure.Thus, during rear spray, fuel injector uses relatively low
Injection pressure, high injection pressure fuel oil can be avoided to wash away cylinder wall and to cause fuel dilution.
When grain catcher is in non-renewable operating mode, spray oil spout after being now made without, only
Need to carry out main jet oil spout, or main jet and spray joint in advance.Wherein, the second judge module is sentenced
Disconnected oil spout opportunity.Now, the second judge module first has to judge the load of electromotor:
If load is relatively low, then need to combine spray in advance and main jet；Otherwise, it is only necessary to carry out main jet i.e.
Can.When needs are by when spray and main jet combine in advance, and now the second judge module is further according to starting
Machine piston stroke judges to be currently at pre-spray or main jet period.Equally, main jet is with pre-
Spray to realize different fuel pressures and control, and needs to be disconnected by the first switch valve 3 to open with second
The break-make closing valve 4 realizes.Specifically:
During main jet, controlling the first switch valve 3 and turn on, second switch valve 4 disconnects, so that high
Rail pressure fuel oil is entered in cylinder by the first asphalt channel 1；
When spraying in advance, as above-mentioned, controlling the first switch valve 3 and disconnect, second switch valve 4 turns on,
So that high rail pressure fuel oil enters the second asphalt channel 2, reduce fuel oil pressure through air relief valve 5
Power.Wherein, use relatively low fuel pressure can realize fuel injection characteristic change during pre-spray, improve
Efficiency of combustion reduces oil consumption.
Embodiment of above is merely to illustrate the present invention, rather than limitation of the present invention.Although
Being described in detail the present invention with reference to embodiment, those of ordinary skill in the art should
Understand, technical scheme is carried out various combination, amendment or equivalent, all
Without departing from the spirit and scope of technical solution of the present invention, the right in the present invention all should be contained and want
Ask in the middle of scope.
Claims (5)
1. a fuel injector, it is characterised in that include first asphalt channel and second of parallel connection
Asphalt channel, and controller；Described first asphalt channel and the of described second asphalt channel
One common port connects common rail pipe, and the second common port connects jet；On described first asphalt channel
It is provided with the first switch valve, described second asphalt channel is provided with air relief valve and second switch
Valve, described first switch valve, second switch valve are all connected with described controller；Described controller
Including the first judge module, the second judge module and signal transmitting module；Described first judges mould
Block is for judging the operating mode of grain catcher, when described second judge module is used for judging oil spout
Machine, and described first judge module, described second judge module all will determine that data are sent to institute
State signal transmitting module；Described signal transmitting module is opened to described first according to described judgement data
Close valve and second switch valve sends control signal.
Fuel injector the most according to claim 1, it is characterised in that described controller is
Automobile specified microcomputerized controller.
Fuel injector the most according to claim 1, it is characterised in that described first switch
Valve is high-pressure solenoid valve, and described second switch valve is low-voltage solenoid valve.
4. a co-rail oil injection system, it is characterised in that include that claims 1 to 3 is any
The fuel injector of one.
Co-rail oil injection system the most according to claim 4 carries out the method for oil spout, and it is special
Levy and be, comprise the following steps:
S1, judged the operating mode of grain catcher by the first judge module, when it is in regeneration work
Enter S2 during condition, otherwise enter S3；
S2, judged oil spout opportunity by the second judge module:
During main jet, signal transmitting module sends to the first switch valve and opens signal, to second switch
Valve sends shutdown signal；
During rear spray, signal transmitting module sends shutdown signal to the first switch valve, to second switch
Valve sends opens signal；
S3, judged oil spout opportunity by the second judge module:
During main jet, signal transmitting module sends to the first switch valve and opens signal, to second switch
Valve sends shutdown signal；
When spraying in advance, signal transmitting module sends shutdown signal to the first switch valve, to second switch
Valve sends opens signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610257719.2A CN105863862B (en) | 2016-04-22 | 2016-04-22 | A kind of fuel injector, co-rail oil injection system and fuel injecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610257719.2A CN105863862B (en) | 2016-04-22 | 2016-04-22 | A kind of fuel injector, co-rail oil injection system and fuel injecting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863862A true CN105863862A (en) | 2016-08-17 |
| CN105863862B CN105863862B (en) | 2018-08-31 |
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ID=56633889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610257719.2A Active CN105863862B (en) | 2016-04-22 | 2016-04-22 | A kind of fuel injector, co-rail oil injection system and fuel injecting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863862B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159559A (en) * | 1980-05-09 | 1981-12-08 | Nissan Motor Co Ltd | Fuel injection device |
| US5860597A (en) * | 1997-03-24 | 1999-01-19 | Cummins Engine Company, Inc. | Injection rate shaping nozzle assembly for a fuel injector |
| CN102470750A (en) * | 2009-07-21 | 2012-05-23 | 丰田自动车株式会社 | Fuel system and vehicle |
| CN102644510A (en) * | 2011-02-18 | 2012-08-22 | 株式会社电装 | Fuel injection system for internal combustion engine |
| US20150136073A1 (en) * | 2011-05-11 | 2015-05-21 | Caterpillar Inc. | Dual Fuel Injector and Engine Using Same |
-
2016
- 2016-04-22 CN CN201610257719.2A patent/CN105863862B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159559A (en) * | 1980-05-09 | 1981-12-08 | Nissan Motor Co Ltd | Fuel injection device |
| US5860597A (en) * | 1997-03-24 | 1999-01-19 | Cummins Engine Company, Inc. | Injection rate shaping nozzle assembly for a fuel injector |
| CN102470750A (en) * | 2009-07-21 | 2012-05-23 | 丰田自动车株式会社 | Fuel system and vehicle |
| CN102644510A (en) * | 2011-02-18 | 2012-08-22 | 株式会社电装 | Fuel injection system for internal combustion engine |
| US20150136073A1 (en) * | 2011-05-11 | 2015-05-21 | Caterpillar Inc. | Dual Fuel Injector and Engine Using Same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863862B (en) | 2018-08-31 |
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