CN1867764A - Pressure control valve comprising a backflow restrictor - Google Patents
Pressure control valve comprising a backflow restrictor Download PDFInfo
- Publication number
- CN1867764A CN1867764A CNA2004800303460A CN200480030346A CN1867764A CN 1867764 A CN1867764 A CN 1867764A CN A2004800303460 A CNA2004800303460 A CN A2004800303460A CN 200480030346 A CN200480030346 A CN 200480030346A CN 1867764 A CN1867764 A CN 1867764A
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- China
- Prior art keywords
- valve
- groove
- closing element
- nozzle
- flush mounting
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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
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a pressure control valve (1) comprising a backflow restrictor for installation in a transport line (9) between a pump working chamber (21) of a fuel-injection pump and an injection nozzle (10) of a compression-ignition internal combustion engine. Said valve comprises: a valve housing (2) in the form of a port with a graduated axial through-bore (3); an insert, positioned on the side of the pump working chamber and containing an axial passage (12; 12, 33, 34, 35, 36), the end of said insert on the nozzle side having a first valve seat (13) that surrounds the axial passage; a valve plate comprising a cavity (15), which forms an elastically deformable, tongue-shaped constriction (16) with a first valve closing member that can be raised from its seal seat by means of a fuel pressure on the side of the pump working chamber, causing an elastic deformation of the tongue-shaped constriction; and a restrictor bore that is configured in the first valve closing member (17).
Description
The present invention relates to a kind of pressure valve that has the backflow flow controller by its classification, be used for being installed in a self-igniting internal combustion engine at the pump work chamber of its fuel-injection pump and the fuel-supply pipe between its nozzle.
In a kind of known pressure valve between being installed in pump work chamber in the pressure tube and spraying into a little, the discharge pressure by fuel lifts the valve closing element from its valve seat, so the pressure valve spring force that overcomes valve spring is opened can flow to fuel and sprayed into a little.After the conveying of high pressure finished, the valve closing element returned on its valve seat again; Also close simultaneously and spray into a little.
Importantly, exist undelayed as far as possible fast pressure to raise at the nozzle place here.Yet the prerequisite of this situation is as far as possible little with the volume of fuel filling, so that make the time lag that causes because of fuel filling can keep shortly as far as possible.Yet, because of cavity that is so-called clearance space that structural design causes almost can not be avoided.
In addition, because the end-stop of high-pressure delivery forms pressure wave in pressure valve and in the volume that comprises between spraying into a little, they are in pressure valve and the propagation back and forth that sprays into point.Perhaps, this pressure wave is had the ability to reopen in undesirable mode and is sprayed into a little pent nozzle, thereby makes fuel leakage current and understand and might form undesirable combustion residue there.
For avoiding pressure wave, knownly a contrary pressure valve through-flow direction is set and permeates the backflow flow controller that passes through, can be after pressure valve is closed the pressure in the pressure tube be reduced to some static pressure of predesignating by the backflow flow controller.
Common this backflow flow controller is located in the independent groove of valve housing through hole of pressure valve.The constituent element of backflow flow controller generally includes one and is contained in and has a design to abut in the valve plate of socket on the annular end face of nozzle one side its socket at the valve seat on the annular end face of nozzle one side, one in the described groove, and it has one with the sealing surface of valve seat mating reaction and be provided with one and feed throttle orifice in the socket lumen and one valve plate is pressed in backflow flow controller spring on its sealing seat.The power that valve plate is overcome backflow flow controller spring by the fuel of carrying during work is lifted and to spraying into a direction motion, being leaned against on the corresponding stop surface until its retaining, so that unhinderedly discharge the stream of fuel from its sealing surface.After carry finishing, the refluxed spring force of flow controller spring of valve plate is pressed onto on its sealing seat again, and by throttle orifice the pressure in the delivery pipe is reduced to a static pressure by the spring force regulation of backflow flow controller spring.
The shortcoming of this known backflow flow controller is, must provide enough spaces for backflow flow controller spring is installed, and with regard to the top problem of once mentioning, this space can be regarded as for being harmful space to spraying into a little quick transfer the fuel.In addition, traditional backflow flow controller is easy to wearing and tearing, because valve plate often impinges upon on its stop surface suddenly and causes wearing and tearing when pump piston is handled suddenly.Also have, the dismounting of traditional backflow flow controller is pretty troublesome.
The objective of the invention is to, overcome the described shortcoming of traditional pressure valve with backflow flow controller, and thereby a kind of novel pressure valve that has the backflow flow controller is provided, it has little clearance space, relatively is not easy wearing and tearing and easier dismounting.
This purpose reaches by the pressure valve with backflow flow controller by claim 1 of the present invention by the present invention.The favourable design of the present invention is by the feature description of dependent claims.
By the pressure valve with backflow flow controller of the present invention, comprise that one is the valve housing that the pipe joint of a stepped axial hole is arranged in form, this through hole towards the direction in pump work chamber expand as the groove of first hollow cylinder and with it in abutting connection with expand as the groove of second hollow cylinder, wherein, the groove of first hollow cylinder has the cross-sectional diameter bigger than the groove of second hollow cylinder.Therefore the direction towards the pump work chamber at first expands to first groove, and expands to second groove with directly being attached thereto, so this through hole has three segmentations of passing through a mutual transition of step respectively.When through hole expanded to first groove, the coverage rate in nozzle one side that the groove of first hollow cylinder is reserved by the through hole outlet formed a step, first stop surface of its looping.When first groove expanded to second groove, the coverage rate in nozzle one side that the groove of second hollow cylinder is reserved by the outlet of first groove formed a step, second stop surface of its looping at through hole.
Also comprise a flush mounting in pump work chamber one side is packed the second hollow cylinder groove of valve housing into by pressure valve of the present invention.Can be designed to one or manifold flush mounting and be provided with an axial penetrating via, in addition, flush mounting has first valve seat around this axial penetrating via in the end of nozzle one side.
In addition, comprise a valve plate by pressure valve of the present invention, it is embedded into device and is pressed against on second stop surface of the second grooved ring shape in the end of nozzle one side.Here importantly, valve plate is provided with a perforation, constitutes the ligule constriction district and first a valve closing element that is connected with ligule constriction district of an elastically deformable by it.In other words, cut out a ligule constriction district and first a valve closing element that is connected with ligule constriction district by perforation from valve plate, wherein ligule constriction district keeps being connected with all the other valve plates.The first valve closing element energy resiliently deformable that ligule constriction district is sized to guarantee ligule constriction district or is hanging.In other words, by means of the elastic deformability in ligule constriction district, the first valve closing element can go out from the deflection of valve plate plane.
According to a favorable characteristics of the present invention, the first valve closing size of component is designed to, the outlet that makes its one side can cover the axial penetrating via of described flush mounting, the first valve closing element is positioned at the axially-extending intersegmental part of second stop surface of annular on the other hand, so can enter in first groove when the rotation motion that has the elastic deformability owing to ligule constriction district thereby may implement.In addition, the first valve closing element is provided with a primary sealing area with the first valve seat mating reaction of flush mounting.
The first valve closing element can be caused the fuel pressure of pump work chamber one side of described ligule constriction district resiliently deformable to lift from its sealing seat by the present invention, and the first valve closing element is entering in first groove of valve housing when ligule constriction district carries out above-mentioned rotation motion.In addition, it is designed and sized to the first valve closing element at the axial height of hollow cylinder first groove, and it is rested on first stop surface of first groove when abundant revolution.
In order to play the backflow flow controller, the first valve closing element has the throttle orifice of a design at the axially-extending intersegmental part of the outlet of flush mounting axial hole by the present invention.In order to reach restriction effect, the diameter of throttle orifice is less than the diameter of flush mounting axial hole outlet.
By in first kind of preferred form of implementation of pressure valve of the present invention, be that a flush mounting that is provided with the tubular valve body of axial hole is designed to integral type in form.Therefore this pressure valve is only by forming with the backflow flow controller that pressure is connected and is pressed between them between the valve body at valve housing.The backflow flow controller not only satisfies the throttling function that suppresses delivery pipe internal pressure ripple in this form of implementation, but also satisfies the original function of pressure valve, that is opens or closes delivery pipe according to the fuel pressure of pump work chamber one side.A kind of like this pressure valve of greatly simplifying than traditional pressure valve structure with backflow flow controller with backflow flow controller, clearance space significantly reduces, because except that the through hole of the through hole of valve body and valve housing, only need a regulation that the through hole of valve housing is expanded as one first groove and one second groove.
In the another kind of preferred form of implementation by the pressure valve with backflow flow controller of the present invention, the valve body with design axial hole therein has a ring surface that constitutes second valve seat.Therefore this pressure valve also is equipped with the second valve closing element, it overcomes a spring force that is contained in the valve spring in valve housing second groove and can be guided with moving axially in the axial hole of valve body, and a secondary sealing area with the second valve seat mating reaction of valve body is arranged.
In the another kind of preferred form of implementation by the pressure valve with backflow flow controller of the present invention, flush mounting is designed to manifold and comprises that a tubular valve body that is provided with axial hole, one abut in valve body with its annular end face in pump work chamber one side and the socket on the annular end face of nozzle one side and one its annular end face in pump work chamber one side abutted in the inner sleeve of socket on the annular end face of nozzle one side.Here, valve body constitutes second valve seat by its annular end face in nozzle one side.In addition, this pressure valve also comprises one second valve closing element, it overcomes a spring force that is contained in the valve spring in the valve housing second groove spring chamber and can be guided with moving axially in the axial hole of valve body, and a secondary sealing area with the second valve seat mating reaction of valve body is arranged.
With reference to the accompanying drawings by two explanations as the form of implementation of example of the present invention are elaborated the present invention, in the accompanying drawing:
Fig. 1 represents to have the example of a kind of preferred form of implementation of the present invention of integral type flush mounting;
Fig. 2 represents to have the example of a kind of preferred form of implementation of the present invention of the flush mounting that many parts form.
Fig. 1 represent to have the one of being designed to flush mounting by the present invention the example of the pressure valve of backflow flow controller is arranged.This pressure valve 1 comprises that one is the valve housing 2 with pipe joint of a stepped axial hole 3 in form.Through hole 3 is expanded as the groove 4 of one first hollow cylinder and the groove 5 of one second hollow cylinder towards the direction in pump work chamber.Here the groove 5 of second hollow cylinder has the big cross-sectional diameter of groove 4 of ratio first hollow cylinder.The groove 4 of first hollow cylinder has first stop surface 6 of an annular towards the nozzle direction, and the groove 5 of second hollow cylinder has second stop surface 7 of an annular towards the nozzle direction.Through hole 3 feeds in the taper mouth 8 in nozzle side, and it is used for, and 10 delivery pipe 9 is connected with fuel supply being sprayed into a little.
In the groove 5 of second hollow cylinder of pump work chamber one side valve door shell 2, pack into and be the flush mounting of integral type valve body 11 in form.Valve body 11 is provided with an axial penetrating via 12.Valve body 11 has first valve seat 13 around axial penetrating via 12 in the end of nozzle side.Valve body 11 axial penetrating vias 12 are located in the axially-extending line of valve housing 2 through holes 3.Valve housing 2 and valve body 11 screw (not shown) each other by traditional mode.Valve body 11 in the end of pump work chamber one side by a Sealing 20 fluid-tight be fixed on of pump element and constitute on the cylindrical shell 22 in pump work chamber 21.
Between second stop surface 7 of the end of valve body 11 nozzles one side and second groove, 5 annulars, clamp a valve plate 14 (seeing the enlarged view of Fig. 1 upper right valve plate 14) with steel plate system.By the enlarged view of valve plate 14 as can be seen, valve plate 14 is shaped in form the perforation 15 for the part ring.Constitute the ligule constriction district 16 and first a valve closing element 17 that is connected with ligule constriction district of an elastically deformable by perforation 15.The first valve closing element 17 is sized to make it to cover the mouth 18 of valve body 11 axial penetrating vias 12 on the one hand, and elongation line is contained in second stop surface, 7 inside of second groove, 5 annulars vertically on the other hand.In addition, the first valve closing element 17 is provided with a primary sealing area 18 with first valve seat, 13 mating reactions of valve body 11 sealed sides end faces.The first valve closing element 17 can shift out from valve plate 14 planes by the revolution around the ligule constriction district 16 of elastically deformable.
The first valve closing element 17 can be caused the fuel pressure of pump work chamber one side of ligule constriction district 16 resiliently deformables to lift from its sealing seat 13 by the revolution around the ligule constriction district 16 of elastically deformable, and the first valve closing element 17 entered in first groove 4 of valve housing 2 and rested on first stop surface 6 of first groove 4 this moment.
In addition, the first valve closing element 14 has a throttle orifice 19 in the axially-extending section of the outlet 18 of valve body 11 axial holes 12.In order to reach restriction effect, throttle orifice 19 has one than the little diameter of valve body 11 axial holes 12.For example, the diameter of throttle orifice is 0.5-1.0mm.As seen from Figure 1, the throttle orifice 19 of the through hole 12 of the through hole 3 of valve housing 2, valve body 11 and the first valve closing element 17 is arranged vertically with being in alignment with each other.
The working method of form of implementation is as follows as shown in Figure 1 by pressure valve of the present invention: by the fuel of being carried by pump element that is in high pressure conditions, the power that makes the first valve closing element 17 overcome ligule constriction district dielasticity metamorphosis is lifted from its sealing seat 13, thereby makes the first valve closing element 17 enter in first groove 4 of valve housing 2 and finally rest on first stop surface 6 of first groove 4.Now fuel can be unhinderedly flows to from the pump work chamber 21 of the cylindrical shell 22 of pump element and sprays into a little 10.Owing to stop suddenly carrying, the first valve closing element 17 is transferred " overvoltage " in the pipe and is pressed in its sealing surface 18 on the sealing seat 13 and closes and go to the delivery pipe that sprays into a direction.Suppressed at the first valve closing element 17 and sprayed into a little contingent pressure wave between 10 by throttle orifice 19, until in delivery pipe, forming a static pressure by the required power defined of ligule constriction district resiliently deformable.
Fig. 2 represent to have be designed to manifold flush mounting the pressure valve that the backflow flow controller is arranged by the present invention for example.Press in the pressure valve form of implementation of the present invention similarly partly with identical symbolic representation with shown in Figure 1.For avoiding unnecessary repetition, for the pressure valve of representing among Fig. 2 by form of implementation of the present invention only illustrate its structurally with the difference of pressure valve shown in Figure 1.
The flush mounting of pressure valve 1 shown in Figure 2 comprises that a tubular valve body that is provided with axial hole 12 11, one abut in inner sleeve 28 on the annular end face 27 that valve body 11 abuts in its annular end face 26 in pump work chamber one side the socket 23 on the annular end face 25 of nozzle one side and socket 23 nozzles one side with its annular end face 24 in pump work chamber one side.Inner sleeve 28 is provided with a through hole 36.Valve body 11 constitutes second valve seat 29 by its annular end face 25 in nozzle side.
This pressure valve 1 also comprises one second valve closing element 30, and it overcomes a valve spring 31 in the spring chamber 35 that is contained in valve housing 2 second grooves 5 in the axial hole 12 of valve body 11 spring force can be guided with moving axially.In addition, the second valve closing element 30 has a secondary sealing area 32 with second valve seat, 29 mating reactions of valve body 11.In order to connect the through hole 12 of second groove 5 and valve body 11, adopt a groove 33 that is located in the second valve closing element, 30 circumferential surfacies, its one of feeding is located in the annular groove 34 of secondary sealing area 32 upstreams.Valve housing 2 screws (not shown) with valve body 11 each other by traditional mode, and in this case, socket 23, inner sleeve 28 and valve plate 14 are compressed mutually.The axial penetrating via of flush mounting is made of the through hole 36 of through hole 12, groove 33, annular groove 34, spring chamber 35 and inner sleeve 28 in the form of implementation shown in Figure 1.
The working method of form of implementation is as follows as shown in Figure 2 by pressure valve of the present invention: by the fuel of being carried by pump element that is in high pressure conditions, the power that makes the second valve closing element 30 overcome threshold gate spring 31 is lifted from its sealing seat 29, and pressure valve 1 carries out the transition to open position from its closed position, under this position, annular groove 34 feeds in the spring chamber 35 of threshold gate spring 31.In addition, by high fuel pressure the first valve closing element 17 being overcome stops the power of ligule constriction district's 16 resiliently deformable effects to be lifted from its sealing seat 13, at this moment, make the first valve closing element 17 enter in first groove 4 of valve housing 2 and finally rest on first stop surface 6 of annular of first groove 4.Now fuel can be unhinderedly flows to from the pump work chamber 21 of the cylindrical shell 22 of pump element and sprays into a little 10.Owing to stop suddenly carrying, the second valve closing element 30 by the spring force pressure of valve spring 31 on its sealing seat 29 and pressure valve 1 carry out the transition to closed position from its open position.Meanwhile the first valve closing element 17 be transferred the pipe in " overvoltage " its sealing surface 18 is pressed on the sealing seat 13.Suppressed at the first valve closing element 17 and sprayed into a little contingent pressure wave between 10 by throttle orifice 19, until in delivery pipe, forming a static pressure by the required power defined of ligule constriction district resiliently deformable.
Claims (8)
1. a pressure valve (1) that has the backflow flow controller is used for being installed in the pump work chamber (21) that is positioned at its fuel-injection pump of a self-igniting internal combustion engine and the fuel-supply pipe (9) between its nozzle (10), comprises
-one is the valve housing (2) that has the pipe joint of a stepped axial hole (3) in form, this through hole (3) towards the direction of pump work chamber (21) expand as one first hollow cylinder groove (4) and with the groove (4) of this first hollow cylinder in abutting connection with expand as the groove (5) of one second hollow cylinder, wherein, the groove of second hollow cylinder (5) has the bigger cross-sectional diameter of groove (4) than first hollow cylinder, the groove of first hollow cylinder (4) has first stop surface (6) of an annular towards the nozzle direction, and the groove of second hollow cylinder (5) has second stop surface (7) of an annular towards the nozzle direction
-one has an axial penetrating via (12 in pump work chamber one side is packed the groove (5) of valve housing (2) second hollow cylinders into; 12, flush mounting 33,34,35,36), wherein, flush mounting has first valve seat (13) around this axial penetrating via in the end of nozzle one side,
Valve plate (14) on-second stop surface (7) that is pressed against second groove (5) annular by flush mounting in the end of nozzle one side, this valve plate is provided with a perforation (15), constitute the ligule constriction district (16) and first a valve closing element (17) that is connected with ligule constriction district of an elastically deformable by it, this first valve closing element (17) covers the axial penetrating via (12 of described flush mounting; 12,33,34,35,36) outlet (18) and being contained in the axially-extending section of second stop surface (7) of annular, and be equipped with a primary sealing area (18) with first valve seat (13) mating reaction of flush mounting, wherein, the first valve closing element (17) can be caused the fuel pressure of pump work chamber one side of described ligule constriction district resiliently deformable to lift from its sealing seat, thereby make the first valve closing element (17) enter in first groove (4) of valve housing (2) and rest on first stop surface (6) of first groove (4)
-one axial penetrating via (12 that in the first valve closing element (17), designs at described flush mounting; The throttle orifice (19) of outlet (18) lengthening section inside vertically 12,33,34,35,36), it has the axial penetrating via (12 than described flush mounting; 12, the littler diameter of outlet (18) 33,34,35,36).
2. according to the described pressure valve of claim 1, it is characterized by, described valve plate (14) has the shape of disk.
3. according to claim 1 or 2 described pressure valve, it is characterized by, described perforation (15) is designed to the part annular.
4. according to the described pressure valve of one of claim 1 to 3, it is characterized by, described valve plate (14) is made with steel plate.
5. according to the described pressure valve of one of claim 1 to 4, it is characterized by, the diameter of described throttle orifice (19) is in the 0.5-1.0mm scope.
6. according to the described pressure valve of one of claim 1 to 5, it is characterized by, described flush mounting is a tubular valve body (11) that is provided with an axial hole (12).
7. according to the described pressure valve of claim 6, wherein, described valve body has a ring surface that constitutes one second valve seat, and this pressure valve also comprises one second valve closing element, this second valve closing element overcomes a spring force that is contained in the valve spring in valve housing second groove and can be guided with moving axially in the axial hole of described valve body, and a secondary sealing area with the second valve seat mating reaction of described valve body is arranged.
8. according to the described pressure valve of one of claim 1 to 5, wherein, described flush mounting comprises a tubular valve body (11) that is provided with an axial hole (12), one abuts in described valve body with its annular end face in pump work chamber one side (24) and its annular end face in pump work chamber one side (26) is abutted in inner sleeve (28) on the annular end face (27) of socket (23) in nozzle one side the socket (23) on the annular end face (25) of nozzle one side and one, wherein, described valve body (11) constitutes one second valve seat (29) by its annular end face in nozzle one side (25), and, this pressure valve (1) also comprises one second valve closing element (30), it overcomes a valve spring (31) in the spring chamber (35) that is contained in valve housing (2) second grooves (5) in the axial hole (12) of valve body (11) spring force can be guided with moving axially, and a secondary sealing area (32) with second valve seat (29) mating reaction of valve body (11) is arranged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20317003.2 | 2003-11-05 | ||
| DE20317003U DE20317003U1 (en) | 2003-11-05 | 2003-11-05 | Pressure valve with backflow throttle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1867764A true CN1867764A (en) | 2006-11-22 |
Family
ID=30129106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800303460A Pending CN1867764A (en) | 2003-11-05 | 2004-10-27 | Pressure control valve comprising a backflow restrictor |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1680594A1 (en) |
| JP (1) | JP2007510098A (en) |
| CN (1) | CN1867764A (en) |
| BR (1) | BRPI0416271A (en) |
| DE (1) | DE20317003U1 (en) |
| WO (1) | WO2005045230A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH212495A (en) * | 1938-08-16 | 1940-11-30 | Messerschmitt Boelkow Blohm | Spring plate valve. |
| DE4240302A1 (en) * | 1992-12-01 | 1994-06-09 | Bosch Gmbh Robert | Pressure valve for IC engine - with throttle located in area of reduced cross=section of passage channel |
| JP3471587B2 (en) * | 1997-10-27 | 2003-12-02 | 三菱電機株式会社 | High pressure fuel pump for in-cylinder injection |
-
2003
- 2003-11-05 DE DE20317003U patent/DE20317003U1/en not_active Expired - Lifetime
-
2004
- 2004-10-27 JP JP2006538699A patent/JP2007510098A/en active Pending
- 2004-10-27 BR BRPI0416271-4A patent/BRPI0416271A/en not_active Application Discontinuation
- 2004-10-27 CN CNA2004800303460A patent/CN1867764A/en active Pending
- 2004-10-27 WO PCT/EP2004/012148 patent/WO2005045230A1/en active Search and Examination
- 2004-10-27 EP EP04818114A patent/EP1680594A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0416271A (en) | 2007-01-09 |
| JP2007510098A (en) | 2007-04-19 |
| DE20317003U1 (en) | 2004-01-08 |
| WO2005045230A1 (en) | 2005-05-19 |
| EP1680594A1 (en) | 2006-07-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |