CN1288105A - Common rail type electrically controlled injector - Google Patents
Common rail type electrically controlled injector Download PDFInfo
- Publication number
- CN1288105A CN1288105A CN 99119600 CN99119600A CN1288105A CN 1288105 A CN1288105 A CN 1288105A CN 99119600 CN99119600 CN 99119600 CN 99119600 A CN99119600 A CN 99119600A CN 1288105 A CN1288105 A CN 1288105A
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- Prior art keywords
- valve
- needle
- armature
- common rail
- electronic control
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- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000000446 fuel Substances 0.000 claims abstract description 18
- 230000011664 signaling Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 9
- 230000004044 response Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
A co-track type electrically controlled injector for injecting liquid or gas fuel in cylinder of IC engine is composed of electromognet for controlling needle valve, needle valve for controlling injection procedure, armature rigidly linded to needle valve, and throttle mechanism generating a force in direction of closing needle valve and acting on needle valve in injection procedure. Its advantages are simple structure, high response speed, utilization rate of energy and reliability, and precise control of injection.
Description
The present invention relates to internal-combustion engine common rail electric-controlling fuel injector technical field.
Day by day Ke Ke Abgasgesetz makes that reducing discharge of harmful matter of internal combustion engine has become the focus of paying close attention in internal-combustion engine technology research and the product development process.In order to realize the combustion process of high-efficiency low-pollution, desirable fuel injection process should be that jet pressure, injection timing and jet law can be done to adjust flexibly according to the different operating modes of motor.For diesel engine, also require to have higher jet pressure.Common rail electric-controlling injection system is having bigger flexibility aspect jet pressure, injection timing and the jet law adjustment, thereby the target that has become current external internal-combustion engine manufacturing merchant competitively to develop.Up to the present, exemplary systems has: the ECD-U2 system of (1) Japan electric coating company, and the working principle of its oil sprayer is: with a two-position three way magnetic valve, the motion of control fluid power piston, and then the control needle-valve, realize the control (drawing) of course of injection from SAE Paper 980806; (2) common rail electric-controlling injection system of German BOSCH company, used oil sprayer and the difference of ECD-U2 are: replace two-position three way magnetic valve (drawing from SAE Paper 960871) with two-position two-way solenoid valve; (3) the LDCR system of Britain LUCAS company is to have cancelled the fluid power piston with the difference of BOSCH, directly uses electromagnetic valve needle valve movement (drawing from SAE Paper 980803).Also have the Stanadyne company of Italian Fiat, the U.S., Japanese Toyota Company in addition, all develop the common rail electric-controlling injection system that differs from one another in succession.From present disclosed data, the sparger that existing common rail electric-controlling injection system is used, its basic principle is all nothing more than three kinds of above-mentioned forms, its common feature is: electromagnetic force elder generation control electromagnetic valve, control needle valve movement directly or indirectly by solenoid valve again, realize course of injection control, thereby compare with the present invention, have common shortcoming: (1) complex structure, technological requirement and cost are higher; (2) transmission link is many, low-response, injection timing and emitted dose poor repeatability, poor reliability; (3) the leakage link is many, and the system capacity utilization ratio is low, and jet pressure is difficult to further raising.Above-mentioned shortcoming has become the obstacle in the popularization of common rail electric-controlling spraying technique, many internal-combustion engine manufacturing merchants still embrace very prudent attitude to selecting for use of this system so far, for example, the new product car that germany volkswagen company fuel consumption per hundred kilometers is three liters, what TDI diesel engine was wherein selected for use is exactly the electrically-controlled pump nozzle fuel injection system, rather than common rail electric-controlling injection system.
The objective of the invention is, propose a kind of novel common rail electronic control jet apparatus, be mainly used in the injection of interior liquid of internal combustion (IC) engine cylinder or gaseous fuel.It can demonstrate fully the flexibility of joint-track type ejecting system aspect jet pressure, injection timing, jet law control, and can overcome the above-mentioned shortcoming of prior art.
The present invention has abandoned prior art electromagnetic valve needle valve movement, realizes the method for course of injection control.The present invention includes the electromagnet of a control needle valve movement and the needle-valve of control course of injection, armature and needle-valve are one near linking rigidly, and the electromagnetic force that acts on the armature can directly be passed to needle-valve, realizes course of injection control.Adopt a throttle mechanism, in course of injection, produce the power consistent, act on the needle-valve with the needle-valve closing direction.
As a further improvement on the present invention, this sparger is provided with needle lift and seat surface sealing state sensing mechanism, be made up of needle-valve, valve seat, armature, iron core, signaling line, with the insulation guide layer, signaling line and needle-valve and armature keep electric conducting state on the needle-valve guide surface.
The present invention can be divided into dual mode:
Mode one: fuel inlet communicates with armature chamber and main chamber.Described throttle mechanism, it can be made of the throttling dish that is located on the pull bar, also can be made of armature that has throttle orifice or throttling groove or needle-valve self.
Mode two: armature chamber communicates with the leaked fuel outlet, and fuel inlet communicates with the main chamber, requires sealing between main chamber and the armature chamber.One pressure balance piston is arranged between armature and the needle-valve, and the diameter of pressure balance piston and needle-valve equate with the seal band diameter that valve seat cooperates or are close.One piston sleeve is arranged, and every an electric insulation layer, the pressure balance piston can move up and down therein between it and the injector body, and keeps motive sealing to cooperate and electric conducting state with piston sleeve.An end and the piston sleeve of signaling line in injector body joins.Described throttle mechanism, it can be made of the throttling dish that is located on the pull bar, also can self be made of the needle-valve that has throttle orifice or throttling groove.
The present invention compared with prior art has following advantage: owing to cancelled solenoid valve, emitter construction is simple, and manufacturability is improved, and has reduced manufacture cost; Owing to simplified transmission link, the speed of response of sparger and precision and reliability all are improved; Owing to reduced the leakage link, improved the system capacity utilization ratio, also improved the jet pressure of system simultaneously.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 is the example of implementing by mode one.
Fig. 2 is the sectional view along A-A line among Fig. 1.
Fig. 3 is the partial enlarged drawing of I part among Fig. 1.
Fig. 4 is the example of implementing by mode two.
Fig. 5 is the sectional view along A-A line among Fig. 4.
Fig. 6 is the partial enlarged drawing of I part among Fig. 4.
Fig. 7 is the schematic diagram that throttle mechanism is arranged on pull bar.
Fig. 8 is the sectional view along A-A line among Fig. 7.
Fig. 9 is needle lift signal occurring principle figure.
Figure 10 is pintle valve seat face seal state signal occurring principle figure.
Fig. 1, Fig. 2, Fig. 3 are the examples that method one is implemented.Coil 3, iron core 2, armature 4 constitute electromagnet component.Armature 4, guide rod 5, pull bar 7, needle-valve 13 link successively for whole.Armature chamber 19 communicates with fuel inlet 20, and communicates with main chamber 15 by intercommunicating pore 16.One armature spring 18 is arranged below the armature 4, make armature be subjected to a power F who makes progress
S1, its objective is to make pull bar 7 be in tensioning state, have throttling groove 12 on the guide surface of needle-valve 13.
When needle-valve 13 is in closed condition, there is following relationship: P1=P2, P3=P
a, P wherein
aFor spraying back pressure, needle-valve 13 acts on the power F1=0.25 π d on the valve seat 9
2 2(P1-P
a)+F
S2-F
S1, F wherein
S2Be the elastic force of needle valve spring 14, d
2Be the diameter of needle-valve 13 with valve seat 9 seal bands.
After the electromagnet energising, armature 4 is subjected to an electromagnetic attraction F2 who makes progress, and as F2 during greater than F1, needle-valve 13 is opened, and injection beginning, fuel are through fuel inlet 20, armature chamber 19, intercommunicating pore 16, main chamber 15, throttling groove 12, at last from spray orifice 10 ejections.After needle-valve 13 was opened fully, approximate had: P2=P3, owing to there is throttling groove 12, P1 keeps needle-valve 13 to open required minimum electromagnetic attraction F2 greater than P2 this moment
Min=0.25 π d
1 2(P1-P2)+F
S2-F
S1
After electromagnet outage, F2 descends, when F2 less than F2
MinThe time, needle-valve 13 is closed, and course of injection finishes.
In order to make sparger energy output needle valve stroke and pintle valve seat face seal state signal, this sparger is provided with needle lift and pintle valve seat face seal state sensing mechanism, its design feature is: a guide pin bushing 6 is arranged, between it and the injector body 8 every an electric insulation layer 17, guide rod 5 can move up and down therein, and keeps electric conducting state with guide pin bushing 6.An end and the guide pin bushing 6 of signaling line 1 in sparger joins.The needle-valve guide surface is an insulation guide layer 11.The occurring principle of signal is seen the explanation of Fig. 9, Figure 10.
The design's throttle mechanism is made of the needle-valve that has throttling groove, and throttling groove also can change throttle orifice into, and throttle mechanism can also be made of the armature that has throttling groove or throttle orifice, or as Fig. 7, shown in Figure 8ly constitute at the throttling dish 24 of pull bar 7 by design.
Fig. 4, Fig. 5, Fig. 6 are the examples of implementing by mode two, compare with the structure of mode one, difference is: pressure balance piston 21 and piston sleeve 22 have replaced the guide rod 5 and guide pin bushing 6 of mode one, pressure balance piston 21 can move up and down in piston sleeve 22, and keeps motive sealing to cooperate and electric conducting state with piston sleeve 22.Fuel inlet 20 communicates with main chamber 15, has a motive sealing to cooperate link between main chamber 15 and the armature chamber 19.15 fuel that leak into armature chamber 19 from the main chamber are discharged by leaked fuel outlet 23.
When needle-valve 13 is in closed condition, there is following relationship: P1=P2, P3=P
a, P wherein
aFor spraying back pressure, needle-valve 13 acts on the power F1=0.25 π (d on the valve seat 9
2 2-d
3 2) P1-0.25 π d
2 2P
a+ F
s, F in the formula
sBe needle valve spring power, d
2Be the diameter of needle-valve 13 with valve seat 9 seal bands, d
3Selection principle be to equal or near d
2, work as d
3=d
2The time, F1=F
s-0.25 π d
2 2P
a, promptly F1 and jet pressure are irrelevant.
After the electromagnet energising, armature 4 is subjected to electromagnetic attraction F2 upwards, and as F2 during greater than F1, needle-valve 13 is opened injection beginning.After needle-valve 13 was opened fully, approximate had P3=P2, owing to there is throttling groove 12, P1 keeps needle-valve to open required minimum electromagnetic attraction F2 greater than P2 this moment
Min=0.25 π (d
1 2-d
3 2) P1-0.25 π d
1 2P2+F
s
After electromagnet outage, F2 descends, when F2 less than F2
MinThe time, needle-valve 13 is closed, and course of injection finishes.
Needle lift and pintle valve seat face seal state sensing mechanism on forming with the difference of mode one are: pressure balance piston 21, piston sleeve 22 have replaced guide rod 5, the guide pin bushing 6 in the mode one respectively, and its working principle is identical.
The design's throttle mechanism is made of the needle-valve 13 that has throttling groove 12, and throttling groove also can change throttle orifice into, and throttle mechanism can also be as Fig. 7, shown in Figure 8ly be made of the throttling dish 24 of design on pull bar 7.
Fig. 7, Fig. 8 are the schematic diagrams that throttle mechanism is arranged on pull bar.Throttling dish 24 is fixed on the pull bar 7, on have throttling 25, throttle orifice is unique passage of going up between chamber 26 and the following chamber 27, throttling dish 24 can slide up and down in injector body 8.The material of throttling dish 24 is non-conductive material such as heatproof plastics, pottery.Have the post groove 28 of up/down perforation on the needle-valve 13.The similar Fig. 1 to Fig. 6 of the working principle of throttle mechanism.
Fig. 9 is needle lift signal occurring principle figure, and this function is finished jointly by following several sections: needle lift in (1) sparger and pintle valve seat face seal state sensing mechanism, form by needle-valve 13, valve seat 9, armature, iron core 2, signaling line 1; (2) external circuits, promptly the lift signal generator 29.Keep electric normal open state between needle-valve 13, armature 4 and the signaling line 1.Iron core 2, valve seat 9 and injector body 8 normal opens and ground connection.Lift signal generator 29 also has grounding end.
Working principle and process are as follows: two pairs of electric contacts in needle-valve 13 and valve seat 9, armature 4 and iron core 2 forming circuits, when needle-valve 13 is opened and not adhesive to terminal time of armature 4, armature 4 does not contact with iron core 2, between signaling line 1 and the injector body 8 is electrical insulation, and the pull-up circuit in the lift signal generator 29 makes signaling line 1 keep high level.When needle-valve 13 is taken a seat or armature adhesive to terminal the time, needle-valve 13 and valve seat 9, or armature 4 contacts with iron core 2, and signaling line 1 is pulled down to low level.The signal of 29 pairs of signaling lines of lift signal generator 1 input carries out filtering and amplifies after shaping handles, from lift signaling line 30 output pulse signals, the rising edge of this signal corresponding with trailing edge needle-valve open beginning and finish, or close the moment of beginning and end.
Figure 10 is pintle valve seat face seal state signal occurring principle figure.This function is finished jointly by following several sections: needle lift in (1) sparger and seat surface sealing state sensing mechanism (see figure 9); (2) external circuits, promptly resistance detector 31.
Working principle and process are as follows: when needle-valve is in closed condition, have contact resistance R between needle-valve 13 and the valve seat 9, if the situation that seat surface adheres to poor sealings such as booty or seat surface damage takes place, R increases.Resistance detector 31 detects the R value and compares with reference value, and when R overgauge value, sealing state signaling line 32 output level jump signals show seat surface poor sealing.
Claims (8)
1. common rail electronic control jet apparatus, it comprises the electromagnet of a control needle valve movement and the needle-valve of control course of injection, it is characterized in that: armature (4) is one with needle-valve (13) near linking rigidly;
One throttle mechanism is arranged, in course of injection, produce and the consistent power of needle-valve (13) closing direction, act on the needle-valve (13).
2. by the described common rail electronic control jet apparatus of claim 1, it is characterized in that: be provided with needle lift and pintle valve seat face seal state sensing mechanism, form with iron core (2), signaling line (1) by described needle-valve (13) and valve seat (9), described armature (4), have an insulation guide layer (11) on the guide surface of described needle-valve (13); Described signaling line (1) keeps electric conducting state with described needle-valve (13) and described armature (4).
3. by claim 1 or 2 described common rail electronic control jet apparatus, it is characterized in that: fuel inlet (20) communicates with armature chamber (19) and main chamber (15).
4. by the described common rail electronic control jet apparatus of claim 3, it is characterized in that: described throttle mechanism, it can be made of the throttling dish (24) that is located on the pull bar (7); Also can constitute by armature that has throttle orifice or throttling groove (4) or needle-valve (13).
5. by the described common rail electronic control jet apparatus of claim 4, it is characterized in that: also include a guide rod (5) and a guide pin bushing (6), it is one that described armature (4), guide rod (5), pull bar (7), needle-valve (13) link successively; Every an electric insulation layer (17), described guide rod (5) can move up and down therein between described guide pin bushing (6) and the injector body (8), and keeps electric conducting state with described guide pin bushing (6); An end and the described guide pin bushing (6) of described signaling line (1) in sparger joins.
6. by claim 1 or 2 described common rail electronic control jet apparatus, it is characterized in that: a pressure balance piston (21) is arranged between armature (4) and the needle-valve (13), the diameter of pressure balance piston (21), and the seal band diameter that cooperates of needle-valve (13) and valve seat (9) equates or close; Armature chamber (19) and leaked fuel outlet (23) communicates, and fuel inlet (20) communicates with main chamber (15), has a motive sealing to cooperate link between main chamber (15) and the armature chamber (19).
7. by the described common rail electronic control jet apparatus of claim 6, it is characterized in that: described throttle mechanism, it can be made of the throttling dish (24) that is located on the pull bar (7); Also can constitute by the needle-valve that has throttle orifice or throttling groove (13).
8. by the described common rail electronic control jet apparatus of claim 7, it is characterized in that: it is one that described armature (4), pressure balance piston (21), pull bar (7), needle-valve (13) link successively; One piston sleeve (22) is arranged, and every an electric insulation layer (17), described pressure balance piston (21) can move up and down in piston sleeve (22) between it and the injector body, and keeps motive sealing to cooperate and electric conducting state with piston sleeve (22); An end and the piston sleeve (22) of described signaling line (1) in injector body joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99119600 CN1288105A (en) | 1999-09-09 | 1999-09-09 | Common rail type electrically controlled injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99119600 CN1288105A (en) | 1999-09-09 | 1999-09-09 | Common rail type electrically controlled injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1288105A true CN1288105A (en) | 2001-03-21 |
Family
ID=5280980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99119600 Pending CN1288105A (en) | 1999-09-09 | 1999-09-09 | Common rail type electrically controlled injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1288105A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010060330A1 (en) * | 2008-11-03 | 2010-06-03 | Qin Caidong | Mixed fuel containing combustible solid powder and an engine using thereof |
| CN102305162A (en) * | 2011-08-19 | 2012-01-04 | 中国兵器工业集团第七○研究所 | Oil nozzle assembly of diesel engine |
| WO2017021288A1 (en) * | 2015-08-03 | 2017-02-09 | Delphi International Operations Luxembourg S.À R.L. | Injection nozzle |
-
1999
- 1999-09-09 CN CN 99119600 patent/CN1288105A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010060330A1 (en) * | 2008-11-03 | 2010-06-03 | Qin Caidong | Mixed fuel containing combustible solid powder and an engine using thereof |
| GB2476766A (en) * | 2008-11-03 | 2011-07-06 | Caidong Qin | Mixed fuel containing combustible solid powder and an engine using thereof |
| CN102305162A (en) * | 2011-08-19 | 2012-01-04 | 中国兵器工业集团第七○研究所 | Oil nozzle assembly of diesel engine |
| WO2017021288A1 (en) * | 2015-08-03 | 2017-02-09 | Delphi International Operations Luxembourg S.À R.L. | Injection nozzle |
| JP2018523785A (en) * | 2015-08-03 | 2018-08-23 | デルフィ・テクノロジーズ・アイピー・リミテッド | Injection nozzle |
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