CN103237981A - Check valve for high-pressure fuel injector - Google Patents
Check valve for high-pressure fuel injector Download PDFInfo
- Publication number
- CN103237981A CN103237981A CN2011800580707A CN201180058070A CN103237981A CN 103237981 A CN103237981 A CN 103237981A CN 2011800580707 A CN2011800580707 A CN 2011800580707A CN 201180058070 A CN201180058070 A CN 201180058070A CN 103237981 A CN103237981 A CN 103237981A
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- Prior art keywords
- fluid
- chamber
- check
- valve
- communicated
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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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
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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
- 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
- F02M59/46—Valves
- F02M59/462—Delivery valves
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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
- 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
- F02M59/46—Valves
- F02M59/464—Inlet valves of the check valve type
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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
A fuel injector comprises a pressurization section defining a variable-volume pressurization chamber. A nozzle section has a longitudinal bore, a nozzle chamber, an orifice and a nozzle valve. The nozzle valve is slides in the longitudinal bore between a first position that blocks fluid communication between the nozzle chamber and the orifice, and a second position that opens fluid communication between the nozzle chamber and the orifice. A check valve is between the pressurization chamber and the nozzle chamber. The check valve comprises a housing comprising an upper portion, a lower portion and a middle portion. The housing defines a check valve chamber. A valve member in the check valve chamber hydro-pneumatically moves between an open position that allows fluid communication from the pressurization chamber to the nozzle chamber and a closed position that prevents fluid communication from the nozzle chamber to the pressurization chamber.
Description
Related application
The application with reference to and require preference and the rights and interests of the U.S. Provisional Patent Application that is entitled as " geometrical shapes in the high-pressure diesel fuel injector (Structural Geometry In A High-pressure Diesel Fuel Injector) " of No. the 61/419th, 585, the serial number submitted on December 3rd, 2010.Above-mentioned temporary patent application be disclosed in this its whole content with referring to mode include this paper in.
Background technique
Usually use hydraulic actuating, electronically controlled high voltage unit formula fuel injector system in the diesel engine.In this system, fluid is supplied to a series of fuel injectors unit in the cylinder cap by sharing the oil storage manifold with high pressure.Each sparger comprises electronic control valve, its control high-pressure liquid apply to provide the power that fuels injection into cylinder.
Each high-pressure fuel injectors has the actuating fluid control valve, and this actuating fluid control valve is flowed into timing and the emitted dose of sparger with the control actuating fluid by electronic control.This actuating fluid control valve starts and the termination course of injection.Representational high-pressure fuel injectors has plunger, when the electronic control valve in the sparger when opening from the signal of engine controller, this plunger is indoor by the fluid displacement from the oil storage manifold in internal pressurization.Fluid is via the plunger effect, and so that the fuel pressure in the pressurized chamber is amplified to following magnitude, this magnitude is enough to force at the valve of closing usually in the outlet port of fuel injector to be opened.When back one valve was opened, the fuel pressure of amplification forced fuel by outlet and enters the firing chamber.The control signal that is terminated to electronic control valve has just stopped injection.When this took place, the valve in the fuel injector outlet port turned back to normal closed condition, and fluid stream from the oil storage manifold to refill the pressurized chamber, force plunger in this process, to be withdrawn.
High-pressure fuel injectors generally includes safety check, and this safety check is on the fuel path between eductor pump element and the injector nozzle element.This check valve design becomes to prevent that fuel from passing back into pump element after finishing the sending of fuel.This safety check prevents that also combustion gas from entering pump element in this gas passes the situation of the valve relevant with nozzle member.
Summary of the invention
A kind of high-pressure fuel injectors comprises the pressures partially that limits the variable volume pressurized chamber at least in part.Nozzle segment has vertical hole, nozzle box, aperture and nozzle group valve.Be arranged in slidably in vertical hole between the primary importance that is communicated with of fluid and the second place that the fluid of opening between nozzle box and the aperture is communicated with that this nozzle group valve can be between block nozzle chamber and aperture.Safety check is between this pressurized chamber and nozzle box, and the fluid that is used for controlling between them is communicated with.Safety check comprises shell, and this shell comprises top, bottom and the intermediate portion between the upper and lower part.This shell limits check-valve chamber.Valve member is positioned in the check-valve chamber, and can move on hydropneumatic ground between open position and closed position, and this open position allows the fluid from the pressurized chamber to the nozzle box to be communicated with, and this closed position prevents that the fluid from the nozzle box to the pressurized chamber is communicated with.
Description of drawings
Fig. 1 is the sectional view of high-pressure fuel injectors.
Fig. 2 is the amplification view of check valve assembly that the fuel injector of Fig. 1 further is shown.
Fig. 3 is the exploded perspective view from the check valve assembly of the fuel injector valve of Fig. 1.
Fig. 4 is the sectional view of the check valve assembly of Fig. 2.
Embodiment
With reference to the accompanying drawings, high-pressure fuel injectors 10 generally includes pressures partially 12 and nozzle segment 14.Pressures partially 12 comprises the booster body 16 with vertical hole 18.Plunger 20 is slidably mounted in vertical hole 18.Pressures partially 12 limits variable volume pressurized chamber 22 at least in part.Particularly, vertically the volume of hole below plunger 20 limits pressurized chamber 22.This volume is along with plunger 20 moving up and down and change in vertical hole 18.
The helical springs of installing with one heart around plunger 20 24 usually longitudinally hole 18 to upper offset plunger 20.Piston 26 is positioned in vertical hole 18 above plunger 20.The control valve body 28 that is installed on the upper end of booster body 16 is fixed on piston 26, plunger 20 and spring 24 in vertical hole 18.Control valve body 28 comprises fluid input 30, and fluid input 30 is connected to the external high pressure fluid source such as the high-pressure manifold (not shown).Valve body 28 carrying electric actuation control valves 32 such as servovalve, are used for control and apply high-pressure liquid to piston 26.This control valve 32 can move between first (closing) position and second (opening) position in response to control signal, and in this primary importance, fluid is blocked to the mobile of piston 26, and in this second place, high-pressure liquid is applied to piston.When control valve 32 is closed, helical spring 24 in vertical hole 18 to upper offset plunger 20.When control valve 32 was opened, high-pressure liquid was applied to piston 26, caused plunger 20 vertically moving down in the hole 18.
Nozzle segment 14 comprises spring retainer 40 and nozzle body 41.Though spring retainer 40 and nozzle body 41 are shown as separate part, their unit that also can form as one.Spring retainer 40 and nozzle body 41 limit vertical hole 42, and this vertical hole 42 ends at nozzle orifice 44.Nozzle group valve 46 is arranged in vertical hole 42 slidably with mobile between first (cutting out) position and second (opening) position, fluid between this first (closing) position block nozzle chamber 48 and the aperture 44 is communicated with, and the fluid that open between nozzle box 48 and the aperture 44 this second (opening) position is communicated with.Helical spring 50 is positioned in the spring retainer 40, above nozzle group valve 46, is used for usually nozzle group valve being biased to its first (closing) position.
The valve member 70 that is positioned in the check-valve chamber 62 can move on hydropneumatic ground between first (opening) position and second (closing) position, first (opening) position allow from the pressurized chamber 22 to the nozzle box 48 fluid is communicated with, second (closing) position prevent from the nozzle box 48 to the pressurized chamber 22 fluid is communicated with.Among the shown embodiment, valve member 70 comprises baffle plate 72.A plurality of fluid passages 78 that baffle plate 72 is roughly dish type and comprises upper surface 74, lower surface 76 and extend between surface 74 and the lower surface 76 thereon.Among the shown embodiment, fluid passage 78 is included in the fan-shaped otch in the outward edge of baffle plate.Multiple other structure can be taked in fluid passage 78, includes but not limited to U.S. Patent No. 5,797, the type described in 427, the integral body of the disclosure with referring to mode include this paper in.Baffle plate 72 can comprise that outfall 77 passes, for example oozes out baffle plate 72 lentamente to allow fluid, with the pressure at balance baffle plate two ends.
Shell upper divides 56 to limit fluid passage 80, and fluid passage 80 allows the fluid between pressurized chamber 22 and the check-valve chamber 62 to be communicated with.Extend between the upper wall 64 of the upper surface 82 on shell top 56 and check-valve chamber 62 fluid passage 80.The upper end of fluid passage 80 is opened to pressurized chamber 22 and is communicated with pressurized chamber's 22 fluids.
Outer casing underpart divides 58 to limit fluid passage 86, and fluid passage 86 allows the fluid between check-valve chamber 62 and the nozzle box 48 to be communicated with.Fluid passage 86 is divided at the lower wall 66 of check-valve chamber 62 and outer casing underpart between 58 the lower surface 88 and is extended.The lower end of fluid passage 86 by fluid passage 90 fluids that limited by spring retainer 40 and nozzle body 41 be connected to nozzle box 48.
Tapered cup nut 92 is screwed on the lower end of booster body 16.When being installed in fuel injector 10 in the motor (not shown), tapered cup nut 92 passes engine wall and extends to firing chamber (not shown) from booster body 16, and booster body 16 is at the place, outside of motor.Tapered cup nut 92 holds check valve assembly 52 and jet element, for example spring retainer 40, nozzle body 41, nozzle group valve 46 and helical spring 50.When tapered cup nut 92 was screwed on the booster body 16, check valve assembly 52 and jet element were clamped into the position with the stacked relation between tapered cup nut 92 and booster body 16.
High-pressure fuel injectors 10 comprises service duct 94, and service duct 94 is connected pressurized chamber 22 with external fuel source fluid such as the fuel manifold (not shown).In this, tapered cup nut 92 comprises a plurality of fluid ports 96.When sparger 10 was installed in the motor, port 96 was aimed at fuel manifold.Port 96 permits fuel to flow into the low-pressure fuel chamber 98 that is limited by the gap between tapered cup nut 92, check valve assembly 52 and the spring retainer 40.As seeing from Fig. 1, check valve assembly 52 is between low-pressure fuel chamber 98 and pressurized chamber 22.Check valve assembly 52 is included in the fluid passage 100 of extending between low-pressure fuel chamber 98 and the pressurized chamber 22.Second safety check, 102 longshore current body channel location.Second safety check 102 comprises the valve member 104 of formula spherical in shape.This valve member 104 can move on hydropneumatic ground between first (opening) position and second (closing) position, this first (opening) position allows to be communicated with from the fluid of low-pressure fuel chamber 98 to pressurized chamber 22, and this second (closing) position prevents that 22 fluids to low-pressure fuel chamber 98 are communicated with from the pressurized chamber.The fluid passage can comprise that edge filter device 101(sees Fig. 3), be used for filtering the chip from the fuel that flows through path 10 0.Among the shown embodiment, the edge filter device is formed on outer casing underpart and divides in 58 the upper surface.Perhaps, the edge filter device can be formed in the lower surface of shell intermediate portion 60, or with the combination of the opposing side of shell intermediate portion 58 and bottom 60.
The operation of fuel injector 10 be controlled so as in response to come the self-controller (not shown), such as the control signal of engine controller.Particularly, this controller is sent the signal of the operation of control control valve 32, flows to timing and the flow of the actuating fluid of fuel injector 10 with adjusting.This control valve 32 starts and the termination course of injection.When control valve 32 was opened, fluid flow through this valve and be applied to piston 26 with the piston 20 that is shifted downwards in pressurized chamber 22.
When piston 20 descended, fuel 22 escaped and enter check-valve chamber 62 by passage 80 from the pressurized chamber.The gravity of high-pressure liquid and/or downward power are biased to its seating position with second valve member 104, to prevent the fluid from pressurized chamber 22 and low-pressure fuel chamber 98.The fuel under high pressure that flows through passage 80 impinges upon on the upper surface 74 of baffle plate 72, causes baffle plate 72 to be lifted off a seat from the upper wall 64 of check-valve chamber 62.The load of opening that is provided by the jet pressure on the upper surface 74 that acts on baffle plate 72 has overcome residual pressure on the lower surface that acts on plate 72, to come retaining plate 72 against upper wall 64.In case sealing is broken, then pass delivery of fuel and open the fuel under high pressure of passage 80 baffle plate 72 is moved down, up to plate 72 in the check-valve chamber 62 the hoop projection and be located in the valve open position.When baffle plate 72 was in its open position, fuel was passed down through passage 80 above the upper surface 74 of baffle plate 72 to the fluid passage 78, passed fluid passage 78 and flowed out outer casing underpart and divide fluid passage 86 in 60.
Then, fuel flows through sending passage 90 and entering nozzle box 48 in spring retainer 40 and the nozzle body 41.Fuel pressure in the chamber 48 is resisted the power of nozzle group valve 46 effects and opposing helical spring 50 and is forced nozzle group valve upwards.Usually, first pressure wave is enough to make nozzle group valve 46 to be lifted off a seat and begins the fuel injection.If pressure wave is not enough to promote nozzle group valve 46, then the pressure of followed formation will be done like this.When nozzle group valve 46 from the aperture 44 when lifting off a seat, fuel passes this aperture and is delivered to relevant engine chamber.
The control signal that is terminated to control valve 32 has just stopped injection.When this took place, helical spring 24 made plunger 20 upwards withdrawal in pressurized chamber 22, and the pressure in the chamber 22 reduces rapidly.Along with these situations take place, the pressure in the nozzle box 48 also descends rapidly and nozzle group valve 46 cuts out.When the pressure in the nozzle box 48 drops to the closing pressure of nozzle group valve 48, the fuel injection end, this closing pressure is for example set by helical spring 50.Residual pressure in the check-valve chamber 62 with baffle plate 72 upwards against the chamber 62 upper wall 64 enter the room 22 and keep the barrier that combusted cylinder gas is invaded injector channels 80 and pressurized chamber 22 to prevent the fuel reverse flow.
In addition, when plunger 20 withdrawals, fuel is drawn into the chamber by inlet channel 100.Valve member 104 lifts off a seat to allow fuel 98 to flow and enter pressurized chamber 22 from the low-pressure fuel chamber.
Claims (10)
1. high-pressure fuel injectors comprises:
Pressures partially, described pressures partially limits the variable volume pressurized chamber at least in part;
Be slidably arranged in described vertical hole between the primary importance that nozzle segment with vertical hole, nozzle box, aperture and nozzle group valve, described nozzle group valve can the fluid between blocking-up described nozzle box and described aperture be communicated with and the second place that the fluid of opening between described nozzle box and the described aperture is communicated with;
Safety check, described safety check are between described pressurized chamber and described nozzle box, and the fluid that is used for controlling between them is communicated with, and described safety check comprises:
Shell, described shell comprise top, bottom and the intermediate portion between the upper and lower part, and described shell limits check-valve chamber; And
Valve member, described valve member is positioned in the described check-valve chamber and can moves on hydropneumatic ground between open position and closed position, described open position allows the fluid from described pressurized chamber to described nozzle box to be communicated with, and described closed position prevents that the fluid from described nozzle box to described pressurized chamber is communicated with.
2. high-pressure fuel injectors as claimed in claim 1 is characterized in that, described valve member comprises baffle plate.
3. high-pressure fuel injectors as claimed in claim 2 is characterized in that, described baffle plate is roughly dish type, and comprises upper surface, lower surface and a plurality of fluid passages of extending between surface and the lower surface thereon.
4. high-pressure fuel injectors as claimed in claim 1, it is characterized in that, described check-valve chamber comprises upper wall, lower wall and sidewall, described upper wall by shell upper divide limits, described lower wall divides by outer casing underpart and limits, described sidewall extends between described upper wall and described lower wall also and is limited by the shell intermediate portion at least in part.
5. high-pressure fuel injectors as claimed in claim 4, it is characterized in that, described shell upper is divided the restriction fluid passage, the fluid passage that this shell upper is divided allows described pressurized chamber to be communicated with fluid between the shell chamber, and wherein, described outer casing underpart divides the restriction fluid passage, and the fluid passage that this outer casing underpart divides allows the fluid between described shell chamber and the described nozzle box to be communicated with.
6. high-pressure fuel injectors as claimed in claim 1 is characterized in that, also comprises the fuel feed passage that described pressurized chamber is connected with the fuel source fluid; And wherein, described safety check inserts and comprise can be at open position that the fluid that allows from the fuel source to the pressurized chamber is communicated with and second valve member that prevents hydropneumatic ground movement between the second place that the fluid of pressurized chamber to fuel chambers is communicated with along described service duct.
7. high-pressure fuel injectors as claimed in claim 1 is characterized in that, each housing parts is dish type basically.
7. high-pressure fuel injectors comprises:
Pressures partially, described pressures partially limits the variable volume pressurized chamber at least in part;
Have vertical hole, nozzle box, aperture, and the nozzle segment of nozzle group valve, be slidably arranged in described vertical hole between the primary importance that described nozzle group valve can the fluid between blocking-up described nozzle box and described aperture be communicated with and the second place that the fluid of opening between described nozzle box and the described aperture is communicated with; And
Safety check, described safety check are between described pressurized chamber and described nozzle box, and the fluid that is used for controlling between them is communicated with, and described safety check comprises:
Shell, described shell comprises top, bottom and the intermediate portion between the upper and lower part, described shell limits check-valve chamber, the sidewall that described check-valve chamber has upper wall, lower wall and extends betwixt, described top limits inlet channel, described inlet channel by the opening in the described upper wall with described pressurized chamber fluid be attached to described check-valve chamber, described bottom limits outlet passage, described outlet passage by the opening in the described lower wall with described safety check fluid coupled described nozzle box extremely; And
Baffle plate, described baffle plate are can be in described check-valve chamber mobile between upper wall and lower wall, and have relative upper surface and lower surface, and described upper surface and lower surface alternately are located in against the upper wall of described check-valve chamber and lower wall respectively;
Wherein, when described baffle plate was located in against the lower wall of described check-valve chamber, the fluid that can take place from described pressurized chamber to described nozzle box was communicated with; And
Wherein, when described baffle plate was located in against the upper wall of described check-valve chamber, the fluid that can block from described nozzle box to described pressurized chamber was communicated with.
8. high-pressure fuel injectors as claimed in claim 7 is characterized in that, described baffle plate is for dish type roughly and be included in a plurality of fluid passages of extending between its upper surface and the lower surface.
9. high-pressure fuel injectors as claimed in claim 7, it is characterized in that, the upper wall of described check-valve chamber is limited by the shell upper branch, and the lower wall of described check-valve chamber is limited by the outer casing underpart branch, and the sidewall of described check-valve chamber is limited by the shell intermediate portion at least in part.
10. high-pressure fuel injectors as claimed in claim 7 is characterized in that, also comprises the fuel feed passage that described pressurized chamber is connected with the fuel source fluid; And wherein, described safety check inserts and comprise can be at second valve member of hydropneumatic ground movement between open position that the fluid that allows from the fuel source to the pressurized chamber is communicated with and the second place that the fluid that prevents from the pressurized chamber to the fuel chambers is communicated with along described service duct.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41958510P | 2010-12-03 | 2010-12-03 | |
| US61/419,585 | 2010-12-03 | ||
| PCT/US2011/063255 WO2012075483A2 (en) | 2010-12-03 | 2011-12-05 | Check valve for high-pressure fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103237981A true CN103237981A (en) | 2013-08-07 |
Family
ID=46172607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800580707A Pending CN103237981A (en) | 2010-12-03 | 2011-12-05 | Check valve for high-pressure fuel injector |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103237981A (en) |
| WO (1) | WO2012075483A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368473A (en) * | 2018-06-19 | 2021-02-12 | 勒克拉布公司 | Ejector device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9856836B2 (en) | 2015-06-25 | 2018-01-02 | Woodward, Inc. | Variable fluid flow apparatus with integrated filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4741478A (en) * | 1986-11-28 | 1988-05-03 | General Motors Corporation | Diesel unit fuel injector with spill assist injection needle valve closure |
| US5181494A (en) * | 1991-10-11 | 1993-01-26 | Caterpillar, Inc. | Hydraulically-actuated electronically-controlled unit injector having stroke-controlled piston and methods of operation |
| US5287838A (en) * | 1993-02-26 | 1994-02-22 | Caterpillar Inc. | Compact reverse flow check valve assembly for a unit fluid pump-injector |
| DE19516565A1 (en) * | 1995-05-05 | 1996-11-21 | Orange Gmbh | Intermittently acting IC engine fuel injection valve |
| CN1174935A (en) * | 1996-07-12 | 1998-03-04 | 贵州红林机械厂 | Mixing type hydraulic electric controlled fuel injector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5947359U (en) * | 1982-09-22 | 1984-03-29 | 株式会社小松製作所 | engine fuel injector |
| JP3357596B2 (en) * | 1998-03-05 | 2002-12-16 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Film deposition apparatus and method for measuring film thickness in-situ in film deposition process |
| US6568602B1 (en) * | 2000-05-23 | 2003-05-27 | Caterpillar Inc | Variable check stop for micrometering in a fuel injector |
| US6363913B1 (en) * | 2000-06-09 | 2002-04-02 | Caterpillar Inc. | Solid state lift for micrometering in a fuel injector |
-
2011
- 2011-12-05 CN CN2011800580707A patent/CN103237981A/en active Pending
- 2011-12-05 WO PCT/US2011/063255 patent/WO2012075483A2/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4741478A (en) * | 1986-11-28 | 1988-05-03 | General Motors Corporation | Diesel unit fuel injector with spill assist injection needle valve closure |
| US5181494A (en) * | 1991-10-11 | 1993-01-26 | Caterpillar, Inc. | Hydraulically-actuated electronically-controlled unit injector having stroke-controlled piston and methods of operation |
| US5287838A (en) * | 1993-02-26 | 1994-02-22 | Caterpillar Inc. | Compact reverse flow check valve assembly for a unit fluid pump-injector |
| DE19516565A1 (en) * | 1995-05-05 | 1996-11-21 | Orange Gmbh | Intermittently acting IC engine fuel injection valve |
| CN1174935A (en) * | 1996-07-12 | 1998-03-04 | 贵州红林机械厂 | Mixing type hydraulic electric controlled fuel injector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368473A (en) * | 2018-06-19 | 2021-02-12 | 勒克拉布公司 | Ejector device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012075483A2 (en) | 2012-06-07 |
| WO2012075483A3 (en) | 2013-04-18 |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130807 |