CN1377444A - Injection valve, in particular for a common rail injection system - Google Patents
Injection valve, in particular for a common rail injection system Download PDFInfo
- Publication number
- CN1377444A CN1377444A CN 00813855 CN00813855A CN1377444A CN 1377444 A CN1377444 A CN 1377444A CN 00813855 CN00813855 CN 00813855 CN 00813855 A CN00813855 A CN 00813855A CN 1377444 A CN1377444 A CN 1377444A
- Authority
- CN
- China
- Prior art keywords
- control
- oil nozzle
- executive component
- control valve
- valve
- 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
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/003—Valve inserts containing control chamber and valve piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to an injection valve, in particular for a common rail injection system comprising a control cylinder directly connected to a nozzle needle which can be moved in the longitudinal direction. A control chamber is encompassed thereby. Said chamber is connected via an inlet throttle to a fuel high pressure source and is connected to a low pressure chamber via an outlet throttle, whereby the outlet throttle is connected to an outlet control valve.
Description
The present invention relates to a kind of oil nozzle, be particularly useful for the oil nozzle of diesel injection system, it has a control piston that directly links to each other with valve needle, this piston is located in the control cylinder with longitudinal movement and forms a control room with it, this control room links to each other with a fuel high pressure source by an inflow throttle valve and links to each other with a low pressure chamber by an outflow throttle valve, at this, flowing out throttle valve can open and close by an outflow control valve, this outflow control valve links to each other with an actuator, and this actuator links to each other with a control unit.
The valve that starts described form is with 1300par or higher fuel pressure (under diesel engine mode situation) work.Emitted dose records by a hydraulic controller according to motor parameter.At this, the control of system realizes by executive component quick electromagnetic or piezoelectric constant.
The state of the art of present hydraulic controller and shortcoming be with reference to Fig. 6, i.e. the longitudinal section explanation of the diesel systems oil nozzle of a routine.
Pass through inlet 2 to this oil nozzle body 1 transfer the fuel with high pressure.This fuel pressure is sent to nozzle 4 by conveyance conduit 3 on the one hand, and delivers to control room 6 by entrance throttle 5 on the other hand.Valve needle 8 in control piston 7 and the nozzle 4 directly contacts.
Because control piston 7 is bigger with respect to the area of the pressure shoulder of valve needle 8, nozzle 4 keeps closing, and sprays and does not take place.
For beginning to spray, control valve 10 is by being opened in this electricity (magnetic or piezoelectric constant) system by pin 9 representatives and therefore making control room 6 unloadings by flowing out throttle valve 11.Therefore, the high fuel pressure itself that acts on the pressure shoulder of valve needle 8 rises, and injection begins thus.Injection is performed until electric system or spring force cuts out control valve 10, and the fuel that flows through entrance throttle 5 raises pressure in the control room 6 again and valve needle 8 is closed.The end that reaches course of injection thus of closing of valve needle 8 just is subjected to hydraulic coupling support.
What this had shortcoming be, after speed control muffler 11 was opened, promptly in course of injection, entrance throttle 5 kept opening fully, and therefore, fuel under high pressure flows into control room 6 subsequently along with the unloading in control room 6.This overslaugh system rapid response and therefore caused sizable energy loss.Only because the hydraulic control that this inexact working method causes loss just accounts for 15% of total losses power.
The someone proposed to eliminate the oil nozzle structure of above-mentioned shortcoming.
Structure as German patent DE 179 16 220 proposes has the double seated valve of traverse, and except that the manufacturing expense height, control system is also complicated.
Other, in DE 44 17 950 disclosed situations, control valve is located at outside the real oil nozzle, and valve needle forms by one together with other member, is not suitable for quick injection.
Other disclosed form also has complicated control system.
The oil nozzle requirement of diesel systems is big.Therefore, it must technology reliably be made with being convenient to.
The objective of the invention is, under situation simple in structure, improve hydraulic control system,, can finish accurately and control procedure fast so that especially in the future more in the course of injection (many fluidic systems) of segmentation.
According to the present invention, above-mentioned purpose will reach in the following manner, and an inlet control valve promptly is set, and whereby, entrance throttle can close on the contrary and open with discharge control valve.
The preferred embodiment of the present invention has dependent claims 2 to 9 described features.
To the present invention be described with three embodiments below.
The longitudinal section of Fig. 1 oil nozzle, wherein, control is preferably passed through an electromagnetic element and is realized,
Cross section, top when not spraying among Fig. 2 Fig. 1,
Same cross-sectional when Fig. 3 sprays,
The same cross-sectional of Fig. 4 when sparger is controlled by electrode contact for piezoceramic actuator,
Fig. 5 is similar to the cross section, top of Fig. 2 and 3, but enters the mouth control valve change location difference,
The longitudinal section of the conventional oil nozzle of Fig. 6.
In first embodiment, Fig. 1 shows oil nozzle body 1, and a cylinder 12 is equipped with in portion within it.In cylinder 12, be provided with a control piston 7 and the speed control muffler 11 that has discharge control valve 10.Control piston 7 valve needles 8 direct and in the nozzle 4 link to each other.
According to the present invention, entrance throttle is provided with a control valve equally, and control valve 13 promptly enters the mouth.Special control pin 14 that be provided with, that play the executive component effect is handled two valves simultaneously.At this, discharge control valve 10 is directly controlled and inlet control valve 13 is handled control by a pressure pin 15 by a control limit stupefied 16 that is positioned on the control pin 14.Therefore, control pin 14 is with two control valves of plain mode control.
Fig. 2 to 4 shows the amplification top sectional view of oil nozzle.Fuel under high pressure is sent to the valve chamber 17 of inlet control valve 13 on the other hand through entering the mouth 2 and send to nozzle 4 on the one hand by transfer passage 3.Under situation shown in Figure 2, should not spray.Therefore, execute the control pin 14 that carries by spring and make discharge control valve 10 keep closing, and control limit stupefied 16 stays open by pressure pin 15 inlet control valves 13.Therefore, high hydraulic pressure passes in the control room 6 by passage 18, and control piston 7 keeps nozzle 4 to close.
As shown in Figure 3, when an electromagnetic element will be controlled pin 14 rises, discharge control valve 10 was opened, and control room 6 and passage 18 are relaxed.Simultaneously, control limit stupefied 16 is unclamped pressure pin 15, and impact type is closed because control room 6 internal pressures descend by inlet control valve 13 that first stage clip supports.Therefore fuel under high pressure can not flow in the control room 6 again, so control room 6 is by fast pressure relief.The hydraulic controller of system therefore work is more accurate, and the hydraulic slip controlled quentity controlled variable obviously reduces.6 fuel that flow out arrive a low pressure chamber by outlet 20 (or a plurality of outlets) from the control room, and the fuel that spills from nozzle 4 and control piston 7/ cylinder 12 junctions also flows back in the low pressure chamber by the return flow line.
For end injection, control pin 14 is moved to the next of it.It closes discharge control valve, simultaneously, opens inlet control valve 13 by its control limit stupefied 16 and pressure pin 15.High hydraulic pressure is executed control piston 17 by passage 18 impact type again ground and is carried, when nozzle 4 resembles end injection desired by quick closedown.
Fig. 4 shows second embodiment, and wherein, the employing piezo ceramic element is a control unit.At this, discharge control valve 10 constitutes the valve of inwardly opening, and this is opposite with Fig. 2.Stage clip 22 is opened by a push rod 23.Piezo ceramic element 24 is eccentric arrangement with respect to the center of oil nozzle body 1.Between the push rod 26 that plays the executive component effect and control valve 10 and 13, inject a double armed lever, preferably constitute a kind of elbow and shoulder bar, make and alternately to handle these two valves with aforesaid spirit.Under spray regime not, discharge control valve 10 cuts out, and inlet control valve 13 is opened, and the working pressure of high hydraulic pressure passes in the control room 6 by passage 18.Under spray regime, executive component push rod 26 is handled elbows like this and is shouldered bar 25, has promptly strengthened by the off-centre of executive component, and discharge control valve 10 control valve 13 that is opened and enters the mouth is closed.When spraying end, executive component push rod 26 is shouldered bar 25 with elbow and is unclamped, and valve 10 is closed, and valve 13 is opened.At this, the spring of unshowned arbitrary structures form impels elbow to shoulder bar 25 to retract among Fig. 4.
In Fig. 5, change the position of inlet control valve 13, enable to do the head of oil nozzle longer and narrowlyer.This has especially at installing space is favourable in limited time.At this, pressure pin 15 and inlet control valve 13 and the 14 parallel arrangements of control pin, fuel under high pressure is led to valve chamber 17 at this corner end by transfer passage 3.Passage 18 is made up of two holes that are mutually the acute angle traveling.Process shown in working method and Fig. 2 and 3 is suitable.Spring force keeps discharge control valve 10 to cut out by control pin 14.Simultaneously, by bridge plate 27 pressure pin 15 being squeezed in it also keeps inlet control valve 13 to open in stop position down.Therefore, inlet control valve 13 and passage 18 that high hydraulic pressure is opened from transfer passage 3 processes pass in the control room 6 and keep valve needle to close.When control pin 14 was risen by electromagnet, outlet valve 10 was opened, and the control valve 13 that enters the mouth is closed.Fuel under high pressure can not flow in the control room 6, and control room 6 is by very fast unloading.Injection is performed until control pin 14 and outlet valve 10 cuts out and opens the inlet control valve by pressure pin 15 simultaneously.Therefore the fuel of being exerted pressure by impact type can flow in the control room 6 and quick end injection.
Bridge limit 27 is embodied as has certain elasticity.When inlet control valve 13 was opened, the stop 28 of pressure pin 15 can form the sealing of pressure pin simultaneously.
Symbol table
1 atomizer body
2 inflow entrances
3 transfer passages
4 nozzles
5 entrance throttles
6 control rooms
7 control pistons
8 valve needles
9 bolts
10 discharge control valves
11 speed control mufflers
12 cylinders
13 inlet control valves
14 control pins
15 pressure pins
16 control limits are stupefied
17 valve chambers
18 passages
19 first stage clips
20 tap holes
21 return flow lines
22 second stage clips
23 push rods
24 executive components
25 elbows are shouldered bar
26 executive component push rods
27 bridge sheets
28 stops
Claims (9)
1. oil nozzle, especially the oil nozzle of diesel injection system, it has a control piston that directly links to each other with valve needle, this control piston is arranged in the control cylinder with longitudinal movement and forms a control room with it, it links to each other with a fuel high pressure source by an entrance throttle and links to each other with a low pressure chamber by a speed control muffler, wherein, speed control muffler can be opened and closed by a discharge control valve, this discharge control valve links to each other with an executive component that links to each other with control unit, it is characterized in that, be provided with an inlet control valve (13), whereby, entrance throttle (5) is closed on the contrary and is opened with discharge control valve (10).
2. according to the described oil nozzle of claim 1, it is characterized in that executive component (14,26) exists the effect in the control related with inlet control valve (13) simultaneously.
3. according to the described oil nozzle of claim 1, it is characterized in that, related in one second executive component (15) and inlet control valve (13) control.
4. according to the described oil nozzle of one of claim 1 to 3, it is characterized in that, inlet control valve (13) can directly or by an elbow that is connected on two arms on the executive component (26) be shouldered bar (25) manipulation by executive component (14,26) and by a control limit stupefied (16) or a bridge limit (27) that is positioned on the executive component (14).
5. according to each described oil nozzle of claim 1 to 4, it is characterized in that, executive component is formed in the first control cylinder as first piston (14), in the latter's cylinder chamber, stretch out a discharge orifice (20) on the one hand, and on the other hand, have with second and control being connected of cylinder, described connection can be opened or closed by executive component, be provided with one second control piston (15) in second control in the cylinder, it with control valve (13) control that enters the mouth on related.
6. according to each described oil nozzle of claim 1 to 5, it is characterized in that inlet control valve (13) is inserted in to cylinder (12) in the path of the transfer passage (3) that extends and towards between the path of the passage (18) in control room (6).
7. according to each described oil nozzle of claim 1 to 6, it is characterized in that, as control unit, employing be electrode contact for piezoceramic actuator (24).
8. according to each described oil nozzle of claim 3,6 or 7, it is characterized in that second executive component (15) links to each other with second control unit that constitutes second electrode contact for piezoceramic actuator.
9. according to the described oil nozzle of claim 7, it is characterized in that the axis of executive component (24) is arranged prejudicially with respect to the system centre of oil nozzle body (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999147772 DE19947772A1 (en) | 1999-10-05 | 1999-10-05 | Injector, especially for common rail injection systems |
| DE19947772.8 | 1999-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1377444A true CN1377444A (en) | 2002-10-30 |
Family
ID=7924451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00813855 Pending CN1377444A (en) | 1999-10-05 | 2000-10-04 | Injection valve, in particular for a common rail injection system |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1218630A2 (en) |
| CN (1) | CN1377444A (en) |
| AU (1) | AU1381101A (en) |
| CZ (1) | CZ20021171A3 (en) |
| DE (1) | DE19947772A1 (en) |
| WO (1) | WO2001025608A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040115B (en) * | 2004-10-09 | 2010-06-16 | 罗伯特·博世有限公司 | Fuel injector with punch-formed valve seat for reducing armature stroke drift |
| CN101331312B (en) * | 2005-12-12 | 2011-05-25 | 罗伯特·博世有限公司 | Fuel injector having a directly actuable injection valve element |
| CN102108927A (en) * | 2009-12-24 | 2011-06-29 | 株式会社电装 | Fuel injection device |
| CN105074171A (en) * | 2013-03-11 | 2015-11-18 | 斯坦蒂内有限责任公司 | Anti-cavitation throttle for injector control valve |
| CN105658945A (en) * | 2013-10-11 | 2016-06-08 | 大陆汽车有限公司 | Plunger/fluid-line arrangement, in particular control-plunger/control-bore arrangement |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10304240A1 (en) | 2003-02-03 | 2004-10-28 | Volkswagen Mechatronic Gmbh & Co. Kg | Device for transmitting a deflection of an actuator |
| DE102006003040A1 (en) * | 2006-01-23 | 2007-07-26 | Robert Bosch Gmbh | fuel injector |
| DE102011089905A1 (en) * | 2011-12-27 | 2013-06-27 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
| DE102016216871A1 (en) | 2016-09-06 | 2018-03-08 | Continental Automotive Gmbh | Fluid injector for a motor vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4022166A (en) * | 1975-04-03 | 1977-05-10 | Teledyne Industries, Inc. | Piezoelectric fuel injector valve |
| DE4302668A1 (en) * | 1993-01-30 | 1994-08-04 | Bosch Gmbh Robert | Fuel injection device for internal combustion engines |
| DE4417950C1 (en) * | 1994-05-21 | 1995-05-11 | Mtu Friedrichshafen Gmbh | Injection system |
| DE19540155C2 (en) * | 1995-10-27 | 2000-07-13 | Daimler Chrysler Ag | Servo valve for an injection nozzle |
| DE19716220B4 (en) * | 1997-04-18 | 2007-08-23 | Robert Bosch Gmbh | Fuel injection unit for internal combustion engines |
| DE29708369U1 (en) * | 1997-05-09 | 1997-07-10 | Fev Motorentech Gmbh & Co Kg | Controllable injection valve for fuel injection on internal combustion engines |
| DE19744235A1 (en) * | 1997-10-07 | 1999-04-08 | Fev Motorentech Gmbh & Co Kg | Fuel injection nozzle for IC engine |
-
1999
- 1999-10-05 DE DE1999147772 patent/DE19947772A1/en not_active Ceased
-
2000
- 2000-10-04 WO PCT/DE2000/003480 patent/WO2001025608A2/en not_active Application Discontinuation
- 2000-10-04 CN CN 00813855 patent/CN1377444A/en active Pending
- 2000-10-04 AU AU13811/01A patent/AU1381101A/en not_active Abandoned
- 2000-10-04 EP EP00975823A patent/EP1218630A2/en not_active Withdrawn
- 2000-10-04 CZ CZ20021171A patent/CZ20021171A3/en unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040115B (en) * | 2004-10-09 | 2010-06-16 | 罗伯特·博世有限公司 | Fuel injector with punch-formed valve seat for reducing armature stroke drift |
| CN101331312B (en) * | 2005-12-12 | 2011-05-25 | 罗伯特·博世有限公司 | Fuel injector having a directly actuable injection valve element |
| CN102108927A (en) * | 2009-12-24 | 2011-06-29 | 株式会社电装 | Fuel injection device |
| CN102108927B (en) * | 2009-12-24 | 2013-01-16 | 株式会社电装 | Fuel injection device |
| CN105074171A (en) * | 2013-03-11 | 2015-11-18 | 斯坦蒂内有限责任公司 | Anti-cavitation throttle for injector control valve |
| CN105658945A (en) * | 2013-10-11 | 2016-06-08 | 大陆汽车有限公司 | Plunger/fluid-line arrangement, in particular control-plunger/control-bore arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1218630A2 (en) | 2002-07-03 |
| WO2001025608A3 (en) | 2001-11-29 |
| CZ20021171A3 (en) | 2003-10-15 |
| WO2001025608A2 (en) | 2001-04-12 |
| AU1381101A (en) | 2001-05-10 |
| DE19947772A1 (en) | 2001-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |