WO2008026438A1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- WO2008026438A1 WO2008026438A1 PCT/JP2007/065672 JP2007065672W WO2008026438A1 WO 2008026438 A1 WO2008026438 A1 WO 2008026438A1 JP 2007065672 W JP2007065672 W JP 2007065672W WO 2008026438 A1 WO2008026438 A1 WO 2008026438A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle valve
- fuel
- groove
- valve
- tip
- Prior art date
Links
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
- F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/042—The valves being provided with fuel passages
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
- F02M61/163—Means being injection-valves with helically or spirally shaped grooves
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1866—Valve seats or member ends having multiple cones
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
Definitions
- the present invention is applied to a pilot fuel injection device of a gas engine, a fuel injection device of a diesel engine, and the like, and by reciprocating a needle valve slidably fitted to a nozzle tip, the front seat surface of the needle valve And a fuel injection valve configured to inject or shut off injection of fuel supplied into a fuel reservoir from an injection hole into a cylinder of an engine by opening and closing a seat portion between the nozzle tip and the seat surface of the nozzle tip .
- a pilot fuel injection device for a gas engine By opening and closing the seat portion between the tip seat surface of the needle valve and the seat surface of the nozzle tip by reciprocating movement of the needle valve slidably fitted in the needle valve hole of the nozzle tip, The fuel supplied into the fuel reservoir is injected into an engine cylinder from an injection hole formed at the tip end of the nozzle tip or is blocked.
- heavy fuel oil is often used as fuel in large gas engines or diesel engines (in addition, heavy fuel oil engines use heavy fuel oil B or heavy fuel C). .
- Fuel injection valves for engines that use heavy oil A as fuel tend to contain a relatively large amount of contaminants in heavy fuel oil A, so these contaminants penetrate into the reciprocating sliding part around the needle valve. easy.
- dust may get mixed into the fuel during engine maintenance and get stuck in the reciprocating sliding part on the outer periphery of the needle valve.
- Such a stagnation of foreign matter or dust into the reciprocating sliding portion of the needle valve outer periphery may cause malfunction, wear, or seizure of the needle valve.
- heavy fuel oil A produces more combustion residue than light oil, so the fuel injection valve of engines that use heavy fuel oil A also accumulates a large amount of combustion residue near the needle valve seat. The accumulated combustion residue of this material peels off and stagnates into the needle valve seat, which tends to induce poor combustion due to irregular injection.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2 0 2 0-2 9 5 3 4 2
- fuel is injected into the circumferential grooves. Introduced to improve the lubricity of the sliding part between the needle valve outer periphery and the nozzle tip.
- Patent Document 2 Japanese Patent Publication No. 2 0 0 5-5 3 3 2 2 2 2
- a plurality of microphone mouth recesses are engraved in the seat portion of the needle valve tip end with the seat surface of the nozzle tip, The lubricity of the seat portion is improved by the fuel accumulated in the recess of the microphone opening.
- the fuel injection valve of an engine using a fuel containing a relatively large amount of contaminants such as heavy fuel oil A has an outer periphery of a needle valve of garbage mixed in the fuel during the contamination or maintenance. It is easy for stagnation to occur in the reciprocating sliding portion, and since much combustion residue is generated, stagnation of the combustion residue into the needle valve seat portion is also likely to occur.
- Fig. 11 shows an example of measured values for the distribution of contaminants in two types of heavy oil A and light oil.
- the two types of A heavy oil have a distribution amount 10 to 100 times that of light oil.
- the present invention provides a needle valve outer periphery sliding portion and a needle valve tip portion of solid foreign matters such as foreign matters, garbage, and combustion residue even in an engine using a fuel containing a lot of foreign matters.
- the purpose of the present invention is to provide a fuel injection valve that prevents the stagnation of the nozzle tip and the nozzle tip, and the resulting malfunction and seizure of the needle valve, and the occurrence of poor combustion due to irregular injection.
- the present invention achieves such an object, and by reciprocating movement of a needle valve slidably fitted in a needle valve hole of a nozzle tip, a sheet between the tip sheet surface of the needle valve and the sheet surface of the nozzle tip
- the fuel that is configured to inject or block the injection of fuel supplied into the fuel reservoir into the engine cylinder from the nozzle hole formed at the tip of the nozzle tip by opening and closing the part.
- a first groove having upper and lower ends opened to allow introduction of fuel is formed on the outer peripheral surface of the needle valve so that the needle valve is reciprocated in the first groove.
- the needle valve is configured to rotate by the flow of fuel, and a second groove that is twisted or inclined in the same direction as the rotation direction of the needle valve is formed on the seat surface of the nozzle chip.
- a plurality of engraved along the direction, the second groove Characterized by comprising forming an edge portion of dropping can ⁇ the solid the second groove in the fuel by cooperation between the tip seat surface of the needle valve by rotating the Kihariben.
- the first groove formed on the outer peripheral surface of the needle valve has one end opened into the fuel reservoir so that a part of the fuel in the fuel reservoir can be introduced and the other end is disposed. It is configured to open to the outside of the needle valve.
- the first groove is a spiral groove formed in a spiral shape in the axial direction of the needle valve, or an upper end is opened to an upper end surface of the needle valve, and a lower end is opened to a fuel reservoir. It consists of any one of the inclined grooves inclined in the axial direction of the needle valve.
- the second groove is intermittently engraved along the circumferential direction of the nozzle tip. It consists of either one of a plurality of intermittent grooves or an inclined groove that is continuous along the circumferential direction of the nozzle tip and is inclined with respect to the circumferential line of the nozzle chip.
- the fuel is introduced into the first groove in which the upper and lower end portions are opened and the fuel can be introduced into the outer peripheral surface of the needle valve, preferably one end is opened in the fuel reservoir facing the lower portion of the needle valve.
- a part of the fuel in the reservoir can be introduced, and the other end is formed in a spiral shape in the axial direction of the needle valve, that is, a first groove opened to the outside of the needle valve, that is, the upper atmospheric pressure space.
- a spiral groove or an upper end opened to the upper end surface of the needle valve, and a lower end opened to the fuel sump, and an inclined groove inclined in the axial direction of the needle valve is engraved.
- the needle valve is rotated by the flow of fuel in the first groove, and the solid surface in the fuel is twisted or inclined in the same direction as the rotation direction of the needle valve on the seat surface of the nozzle tip.
- a second groove with an edge that scrapes off objects, specifically, the circumference of the nozzle tip Having engraved inclined grooves inclined with respect to the circumferential direction lines along connexion intermittently engraved plurality of intermittent grooves were or nozzle tip circumferentially along connexion continuous to and nozzle tip, the direction,
- the present invention provides a mechanism for opening and closing the seat portion between the tip seat surface of the needle valve and the seat surface of the nozzle tip by reciprocating movement of the needle valve slidably fitted in the needle valve hole of the nozzle tip.
- a fuel injection valve configured to inject fuel supplied into a fuel reservoir into an engine cylinder from an injection hole formed at a tip of the nozzle tip, or to block injection; It is characterized in that a groove into which a part of the fuel can enter is formed on the surface, and shot pinning is performed on the outer peripheral surface.
- the groove includes a plurality of axial grooves extending along the axial direction of the needle valve, or a spiral groove formed in a spiral shape, or an upper end opened to an upper end surface of the needle valve and a lower end of the groove It consists of any one of the inclined grooves opened to the fuel reservoir and inclined in the axial direction of the needle valve.
- a groove into which a part of the fuel can enter the outer peripheral surface of the needle valve that is, a plurality of axial grooves extending along the axial direction of the needle valve, specifically, a spiral shape is formed.
- a spiral groove having an upper end opened to the upper end surface of the needle valve and a lower end opened to the fuel sump, and an inclined groove inclined in the axial direction of the needle valve is engraved, and a shot is made on the outer peripheral surface. Since the peening has been performed, foreign matters in the fuel that are about to enter the outer peripheral surface of the needle valve, solid foreign matters such as combustion residues, etc., flow into the groove, so that they enter the outer peripheral surface of the needle valve.
- Shot peening increases the hardness of the outer peripheral surface of the needle valve and improves the wear resistance of the sliding portion.
- the rotation of the needle valve generated by the flow of fuel in the first groove that communicates the high pressure fuel reservoir and the upper atmospheric pressure space causes the fuel in the fuel reservoir to Part flows through the first groove into the atmospheric pressure space, and by turning the needle valve, Solid foreign matter such as foreign matters and debris in the fuel that is about to enter the outer peripheral surface of the needle valve flows into the first groove and rides on the fuel flow as described above to enter the atmospheric pressure space. Since it is discharged, it is avoided to stagnate into the outer peripheral surface of the needle valve. As a result, it is possible to reliably prevent malfunctions and seizure of the needle valve due to stagnation of foreign matters such as foreign matters in the fuel or solid foreign matters such as combustion residues into the outer peripheral surface of the needle valve.
- a second tip is formed on the seat surface of the nozzle chip so as to twist or incline in the same direction as the direction of rotation of the needle valve so as to scrape off the solid matter in the fuel. Due to the edge of the groove, solid residues such as combustion residues, foreign matter in the fuel, and dust that try to enter the seat between the tip of the needle valve and the nozzle tip are scattered in the second groove. As a result, the stagnation into the sheet portion is avoided, and irregular injection due to the stagnation of the solid foreign matter and the occurrence of poor combustion due to this can be prevented.
- the foreign matter in the fuel that is about to enter the outer peripheral surface of the needle valve, or solid foreign matters such as combustion residue is poured into the groove on the outer periphery of the needle valve. It is possible to avoid stagnation in the outer peripheral surface of the needle valve, and by applying shot peening to a portion other than the groove on the outer peripheral surface of the needle valve, fuel is accumulated in the minute holes of the shot peening, so that the outer peripheral surface of the needle valve The lubricity of the sliding portion between the nozzle tip and the nozzle tip is improved, and the hardness of the outer peripheral surface of the needle valve is increased by the shot peening, and the wear resistance of the sliding portion is improved.
- FIG. 1 is a sectional view taken along the valve axis of a pilot injection fuel injection valve for a gas engine according to first to second embodiments of the present invention.
- FIG. 2 is a partial cross-sectional view of the fuel injection valve, (A) is an enlarged view of a Z portion and an X portion of FIG. 1, and (B) is an enlarged view of a Y portion of FIG.
- FIG. 3 is a partial cross-sectional view around the needle valve sliding portion of the fuel injection valve.
- FIG. 4 shows a first example of the needle valve according to the first embodiment of the present invention, in which (A) is a partial side view of the needle valve, and (B) is a cross-sectional view taken along line AA in (A). .
- FIG. 5 shows a second example of the needle valve according to the first embodiment of the present invention, in which (A) is a partial side view of the needle valve, and (B) is a sectional view taken along line BB in (A). .
- FIG. 6 is an enlarged cross-sectional view of the needle valve tip seat portion according to the first embodiment of the present invention (a cross-sectional view taken along line C-C in FIG. 7 and a cross-sectional view taken along line DD in FIG. 8).
- FIG. 5 is a partial side view showing a first example of the needle valve tip sheet portion according to the first embodiment of the present invention.
- FIG. 8 is a partial side view showing a second example of the needle valve tip seat portion according to the first embodiment of the present invention.
- FIG. 9 shows a second embodiment of the present invention
- (A) is a partial side view showing a first example of a needle valve
- (B) is a sectional view taken along line EE in (A).
- FIG. 10 shows a second embodiment of the present invention
- (A) is a partial side view of a needle valve showing a second example of a needle valve
- (B) is a sectional view taken along line FF in (A). It is.
- FIG. 11 is a table showing an example of measured values of the contaminant distribution in two types of heavy oil A and light oil.
- FIG. 1 is a cross-sectional view along the valve axis of a fuel injection valve for pie-mouth injection of a gas engine according to first to second embodiments of the present invention.
- FIG. 2 is a partial cross-sectional view of the fuel injection valve, in which (A) is an enlarged view of a Z portion and an X portion of FIG. 1, and (B) is an enlarged view of a Y portion of FIG.
- FIG. 3 is a partial cross-sectional view around the needle valve sliding portion of the fuel injection valve.
- 100 is an electromagnetic fuel injection valve driven by a solenoid and is configured as follows.
- nozzle tip 1 is a valve body
- 2 is a nozzle tip
- 6 is a nozzle holder
- the nozzle tip 2 is The nozzle nut 4 is screwed and fixed to the lower part of the nozzle holder 2 so that the tight surface is fluid-tight.
- Reference numerals 18 and 18a denote a lower spacer and an upper spacer, which are screwed and fixed to the lower part of the valve body 1 by a nut 14 so that the tight surface is fluid-tight.
- a needle valve 3 is fitted in a needle valve hole formed at the center of the nozzle tip 2 so as to be slidable back and forth.
- a nozzle hole 2a is drilled at the tip of the nozzle tip 2, and a fuel reservoir 17 communicating with the nozzle hole 2a is formed.
- Reference numeral 4 denotes a nozzle nut, which is screwed to the lower part of the nozzle holder 6 and fastens the nozzle tip 2 to the lower part of the nozzle holder 6 in a fluid-tight manner.
- 5 is a push port connected to the upper part of the needle valve 3
- 7 is a needle valve panel interposed between the push rod 5 and the lower surface of the lower spacer 18 and the needle valve spring. 7 urges the needle valve 3 through the push rod 5 in the valve closing direction.
- a control piston 8 is slidably fitted into the fitting hole of the lower spacer 18 and has a lower end connected to the push rod 5.
- 1 6 is a fuel inlet provided on the side of the valve body 1, and the fuel inlet 16 is drilled in the valve body 1, upper and lower spacers 1 8 a, 1 8, nozzle nut 15, etc.
- the fuel reservoir 17 communicates with the upper fuel passage 15 and the lower fuel passage 13 drilled in the nozzle tip 2.
- 1 2 is a solenoid
- 1 1 is an armature
- 9 is a connecting rod connected to the armature 1
- 10 is a return spring interposed between the connecting rod 9 and the valve body 1.
- the fuel stored between the fuel inlet 16 and the oil sump 17 is injected into the combustion chamber (not shown) from the nozzle hole 2a.
- FIG. 4 shows a first example of the needle valve according to the first embodiment of the present invention, in which (A) is a partial side view of the needle valve, and (B) is a cross-sectional view taken along the line AA in (A).
- FIG. 5 shows a second example of the needle valve according to the first embodiment of the present invention, in which (A) is a partial side view of the needle valve, and (B) is a sectional view taken along line B-B in (A).
- FIG. 6 is an enlarged cross-sectional view of the needle valve tip seat portion according to the first embodiment of the present invention (C-C cross-sectional view of FIG. 7 and DD cross-sectional view of FIG. 8), and FIG. FIG. 8 is a partial side view showing a first example of the needle valve tip seat portion according to the first embodiment of the invention, and FIG. 8 shows a second example of the needle valve tip seat portion according to the first embodiment of the invention. It is a partial side view.
- the needle valve 3 in the first embodiment has one end (lower end) opened to the fuel reservoir 17 (see FIG. 3) on the outer peripheral surface 3a of the needle valve 3 so that the inside of the fuel reservoir 17 A first groove is formed in which a part of the fuel can be introduced and the other end (upper end) is opened in the upper space outside the needle valve 3.
- the first groove is constituted by a spiral groove 20 formed in a spiral shape in the axial direction of the needle valve 3.
- a lower end portion of the spiral groove 20 is opened in the fuel reservoir 17, an upper end portion is opened to an upper space outside the needle valve 3, and the flow of fuel in the spiral groove 20
- the needle valve 3 is configured to rotate.
- the first groove is composed of a plurality of inclined grooves 21 inclined in the axial direction of the needle valve 3, and the inclined grooves 21
- the lower end is opened in the fuel reservoir 17, the upper end is opened in the space above the outside of the needle valve 3, and the needle valve 3 is rotated by the flow of fuel in the inclined groove 21. It is configured.
- the needle valve front end seat portion 2 z in the first embodiment includes a seat surface 3 a at the front end of the needle valve 3, and a rotation direction of the needle valve 3 on the seat surface 2 b of the nozzle tip 2.
- a plurality of first grooves which are gripped or inclined in the same direction and are formed along the circumferential direction of the nozzle tip 2 are configured.
- the second groove is formed in the circumferential direction of the nozzle tip 2.
- a plurality of intermittent grooves 22 that are intermittently engraved along the line are engraved in a plurality of rows (or a single row).
- the second groove is a groove inclined at an angle ⁇ with respect to the circumferential line 2 y in the same direction as the rotation direction of the needle valve 3.
- 2 2 is engraved in multiple rows (or 1 row) along the circumferential direction of the nozzle chip.
- the end of the groove 2 2 (second groove) is co-located with the leading end seat surface 3 y by the rotation of the needle valve 3.
- an edge portion 2 2a having a function of dropping solids in the fuel into the groove 2 2 (second groove) is formed.
- a trapezoidal groove having an outer opening as shown in FIG. 6 is suitable.
- the edge portion 2 2 a is formed, It is also possible to form a circular arc.
- a part of the fuel in the fuel reservoir 17 is introduced to the outer peripheral surface of the needle valve 3 by being opened into the fuel reservoir 17 where one end faces the lower portion of the needle valve 3.
- the edge 2 2 a is formed on the seat surface 2 b of the nozzle tip 2 to twist or incline in the same direction as the rotation direction of the needle valve 3 and scrape off the solid matter in the fuel.
- the second groove specifically, a plurality of intermittent grooves 22 2 intermittently engraved along the circumferential direction of the nozzle tip 2 in the first example shown in FIGS. 6 and 7, or FIGS. Since the groove 2 2, which is inclined in the same direction as the rotation direction of the needle valve 3 in the second example shown in FIG.
- the first groove of the needle valve 3 (the spiral groove 20 or the inclined groove) 2
- the needle valve 3 By turning the needle valve 3 generated by the fuel flow in 1), a part of the fuel in the fuel reservoir 1 7 is evacuated to high pressure in the fuel reservoir 1 7 and the upper atmospheric pressure. Flows to the atmospheric pressure space through a first groove in communication with the door, by the rotation of such a needle valve 3, to try to break into the outer peripheral surface of the needle valve 3 Solid foreign matters such as foreign matters and debris in the fuel or combustion residue flow into the first groove and ride on the fuel flow as described above and are discharged into the atmospheric pressure space. Squeezing into the outer peripheral surface of the needle valve is avoided.
- a second groove formed so as to incline and drop the solid matter in the fuel (a plurality of intermittent grooves 2 2 or a groove 2 inclined in the same direction as the rotation direction of the needle valve 3) 2)
- the edge part 2 2a of the needle valve 3 and the tip 2 of the needle valve 2 and the tip 2 of the needle valve 2 is left behind and the solid residue such as foreign matter and dust Is swept into the second groove to avoid the stagnation of the needle valve tip seat 2z, thereby causing irregular injection due to the stagnation of the solid foreign matter and the occurrence of poor combustion due to this. It can be prevented.
- FIG. 9 shows a second embodiment of the present invention
- (A) is a partial side view showing a first example of a needle valve
- (B) is a sectional view taken along line EE in (A).
- FIG. 10 (A) is a partial side view of a needle valve showing a second example of the needle valve
- (B) is a cross-sectional view taken along line F 1 F in (A).
- grooves 20, 2 2 y into which a part of the fuel can enter are formed on the outer peripheral surface 3 a of the needle valve 3, and shot pinning 33 is provided on the outer peripheral surface 3.
- an axial groove 2 2 y is provided on the outer peripheral surface 3 a of the needle valve 3.
- a lower end portion of the axial groove 2 2 y is opened into the fuel reservoir 17, an upper end portion is opened to the space above the outside of the needle valve 3, and a part of the fuel in the fuel reservoir 17 is It enters into the axial groove 2 2 y and moves up in the axial groove 2 2 y and flows out into the external upper space.
- shot pinning 33 is applied to the outer peripheral surface 3 a of the needle valve 3 where the axial groove 22 y is not formed.
- FIG. A spiral groove 20 similar to that in the first embodiment, the lower end of the spiral groove 20 is opened in the fuel reservoir 17, the upper end is opened in the upper space outside the needle valve 3, Part of the fuel in the fuel reservoir 17 enters the spiral groove 20 and moves upward in the spiral groove 20 and flows out into the external upper space.
- shot pinning 33 is applied to the outer peripheral surface 3 a of the needle valve 3 where the spiral groove 20 is not formed.
- the first groove is composed of a plurality of inclined grooves 21 inclined in the axial direction of the needle valve 3 as shown in FIGS. 5 (A) and 5 (B).
- the lower end of 1 can be opened in the fuel reservoir 17, and the upper end can be opened to the upper space outside the needle valve 3.
- shot pinning 33 is applied to the outer peripheral surface 3 a where the spiral groove 20 of the needle valve 3 is not formed.
- a groove into which a part of fuel can enter the outer peripheral surface of the needle valve 3 specifically, a plurality of axial grooves 2 2 extending along the axial direction of the needle valve 2 2 y, a spiral groove 20 formed in a spiral shape, the upper end is opened to the upper space outside the needle valve 3 and the lower end is opened to the fuel reservoir 17 to be inclined in the axial direction of the needle valve 3
- One of the inclined grooves 2 1 see Fig.
- the first groove in the present invention may be provided in the X portion of FIG. 1 and the control piston 8 shown in FIG. 2 (A). Good. In this case, the fuel accumulated in the needle valve spring chamber 7 z in which the needle valve panel 7 is accommodated is introduced into the first groove.
- the seat of the needle valve outer periphery sliding portion and the needle valve tip portion and the nozzle tip of solid foreign matters such as contaminants, garbage, and combustion residues is possible to provide a fuel injection valve that prevents stagnation into the part, the occurrence of malfunction and seizure of the needle valve associated therewith, and the occurrence of combustion failure due to irregular injection.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP07792318.3A EP1965070B1 (en) | 2006-08-31 | 2007-08-03 | Fuel injection valve |
US12/086,629 US7654475B2 (en) | 2006-08-31 | 2007-08-03 | Fuel injection valve |
CN2007800019491A CN101365874B (zh) | 2006-08-31 | 2007-08-03 | 燃料喷射阀 |
US12/408,940 US20090184180A1 (en) | 2006-08-31 | 2009-03-23 | Fuel injection valve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-236064 | 2006-08-31 | ||
JP2006236064A JP2008057458A (ja) | 2006-08-31 | 2006-08-31 | 燃料噴射弁 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/408,940 Division US20090184180A1 (en) | 2006-08-31 | 2009-03-23 | Fuel injection valve |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008026438A1 true WO2008026438A1 (en) | 2008-03-06 |
Family
ID=39135724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/065672 WO2008026438A1 (en) | 2006-08-31 | 2007-08-03 | Fuel injection valve |
Country Status (5)
Country | Link |
---|---|
US (2) | US7654475B2 (ja) |
EP (1) | EP1965070B1 (ja) |
JP (1) | JP2008057458A (ja) |
CN (1) | CN101365874B (ja) |
WO (1) | WO2008026438A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011125154A1 (ja) * | 2010-04-02 | 2011-10-13 | トヨタ自動車株式会社 | 燃料噴射弁及び燃料噴射装置 |
CN105065166A (zh) * | 2015-08-12 | 2015-11-18 | 江苏大学 | 柴油机喷油嘴的针阀、针阀偶件及针阀加工方法 |
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JP2012007529A (ja) * | 2010-06-24 | 2012-01-12 | Toyota Motor Corp | 燃料噴射弁 |
KR101154579B1 (ko) * | 2010-11-23 | 2012-06-08 | 현대자동차주식회사 | 엔진의 인젝터홀 구조 |
DE102011051904A1 (de) * | 2011-07-18 | 2012-06-21 | L'orange Gmbh | Vorrichtung mit in einer Führungsbahn längsverschieblicher Hubstange |
PL220085B1 (pl) * | 2012-03-15 | 2015-08-31 | Akademia Morska W Szczecinie | Wtryskiwacz paliwa |
CN102758713B (zh) * | 2012-07-26 | 2015-09-30 | 任一虎 | 电控双燃料喷嘴总成及其工作方法 |
JP5983535B2 (ja) * | 2013-05-22 | 2016-08-31 | トヨタ自動車株式会社 | 燃料噴射弁 |
EP2824311A1 (de) * | 2013-07-10 | 2015-01-14 | EFI Hightech AG | Kolbenelementanordnung, und Einspritzdüse mit einer Kolbenelementanordnung |
CN104632487A (zh) * | 2015-02-06 | 2015-05-20 | 中国重汽集团重庆燃油喷射系统有限公司 | 带螺旋槽结构的喷油嘴 |
GB2560513A (en) | 2017-03-13 | 2018-09-19 | Ap Moeller Maersk As | Fuel injection system |
DE102018104835A1 (de) * | 2018-03-02 | 2019-09-05 | Atlas Copco Ias Gmbh | Vorrichtung zum Auftragen eines viskosen Materials auf Werkstücke |
CN110805512A (zh) * | 2018-08-05 | 2020-02-18 | 大连理工大学 | 一种带扭转式复合孔的喷嘴 |
GB2585064B (en) * | 2019-06-27 | 2021-11-10 | Delphi Tech Ip Ltd | Fuel injector with closed loop detection |
CN114992025B (zh) * | 2022-06-09 | 2023-10-31 | 北京航空航天大学 | 一种适应负碳生物燃料供油的航空发动机喷油器偶件 |
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- 2007-08-03 CN CN2007800019491A patent/CN101365874B/zh not_active Expired - Fee Related
- 2007-08-03 WO PCT/JP2007/065672 patent/WO2008026438A1/ja active Application Filing
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---|---|---|---|---|
WO2011125154A1 (ja) * | 2010-04-02 | 2011-10-13 | トヨタ自動車株式会社 | 燃料噴射弁及び燃料噴射装置 |
CN105065166A (zh) * | 2015-08-12 | 2015-11-18 | 江苏大学 | 柴油机喷油嘴的针阀、针阀偶件及针阀加工方法 |
CN105065166B (zh) * | 2015-08-12 | 2018-02-23 | 江苏大学 | 柴油机喷油嘴的针阀、针阀偶件及针阀加工方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2008057458A (ja) | 2008-03-13 |
US20090184180A1 (en) | 2009-07-23 |
CN101365874A (zh) | 2009-02-11 |
EP1965070A1 (en) | 2008-09-03 |
CN101365874B (zh) | 2011-07-06 |
US7654475B2 (en) | 2010-02-02 |
EP1965070A4 (en) | 2013-04-03 |
US20080308657A1 (en) | 2008-12-18 |
EP1965070B1 (en) | 2018-11-21 |
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