WO2018083795A1 - 燃料噴射弁 - Google Patents

燃料噴射弁 Download PDF

Info

Publication number
WO2018083795A1
WO2018083795A1 PCT/JP2016/082956 JP2016082956W WO2018083795A1 WO 2018083795 A1 WO2018083795 A1 WO 2018083795A1 JP 2016082956 W JP2016082956 W JP 2016082956W WO 2018083795 A1 WO2018083795 A1 WO 2018083795A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
amateur
armature
fuel injection
orthogonal plane
Prior art date
Application number
PCT/JP2016/082956
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
恭輔 渡邉
範久 福冨
宗実　毅
学 平井
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201680090415.XA priority Critical patent/CN109891081B/zh
Priority to JP2018548530A priority patent/JP6692446B2/ja
Priority to PCT/JP2016/082956 priority patent/WO2018083795A1/ja
Publication of WO2018083795A1 publication Critical patent/WO2018083795A1/ja

Links

Images

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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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

Definitions

  • This invention relates to a fuel injection valve for supplying fuel to, for example, an internal combustion engine of an automobile.
  • injectors are known.
  • a movable core that moves integrally with the valve member is accommodated in the housing.
  • a fixed core disposed on the upstream side of the movable core is fixed to the housing.
  • Around the housing there is provided a coil portion that generates an electromagnetic attractive force for attracting the movable core to the fixed core. When energization of the coil portion is stopped, the valve member is in contact with the valve seat by the force of the spring. When the coil portion is energized, the valve member separates from the valve seat against the spring force due to the electromagnetic attractive force of the coil portion.
  • the present invention has been made to solve the above-described problems, and can suppress the occurrence of variations in operating noise at the time of valve opening and suppress deterioration of responsiveness at the time of valve closing. It aims at obtaining the fuel injection valve which can do.
  • the fuel injection valve according to the present invention has a cylindrical core and a seat surface, and is disposed so as to be displaceable between a valve seat disposed on the downstream side of the fuel flow from the core, the core and the seat surface, A valve body that closes the fuel passage by contacting the seat surface and opens the fuel passage by moving away from the seat surface, a cylindrical holder that houses the valve seat and the valve body, and urges the valve body in a direction that contacts the seat surface And a coil that generates an electromagnetic attractive force that displaces the valve body in the direction away from the seat surface against the urging force of the spring, and the valve body is fixed to the armature and the cylindrical armature facing the core
  • the valve body is in contact with the seat surface due to the amateur's displacement in the direction away from the core, and is separated from the seat surface due to the amateur's displacement in the direction toward the core.
  • the core-side end portion is provided with a convex portion and a flat surface forming portion located radially outside the convex portion, and the flat surface forming portion is a first orthogonal flat surface portion continuous from the convex portion.
  • the first orthogonal plane part is parallel to a plane orthogonal to the axis of the amateur, and the convex part projects toward the core from the position of the first orthogonal plane part.
  • the outline of the convex portion on the plane including the axis is an arcuate curve that continues from the inner peripheral surface of the amateur.
  • the contact area between the convex portion of the amateur and the core can be reduced, and the squeeze force acting between the amateur and the core is reduced when the amateur leaves the core. Can be made. Therefore, the valve body can be easily displaced toward the seat surface, and deterioration of responsiveness when the fuel injection valve is closed can be suppressed. Moreover, regardless of the inclination of the amateur, the variation in the contact state between the core and the convex portion can be reduced, and the occurrence of the variation in the operating sound at the time of valve opening can be suppressed.
  • FIG. 1 is a cross-sectional view showing a fuel injection valve according to Embodiment 1 of the present invention.
  • the fuel injection valve 1 has a drive device 2 and a valve device 3 operated by the drive device 2.
  • the fuel is injected from the valve device 3 after passing through the respective fuel passages in the drive device 2 and the valve device 3.
  • the drive device 2 is disposed inside the housing 4 in a state of surrounding the core 5 with a metal housing 4 having a two-stage cylindrical shape, a metal cylindrical core 5 disposed inside the housing 4.
  • the housing 4, the core 5, the coil 6, the bobbin 7, the cap 8, and the terminal 9 are integrated by a resin molded body 10.
  • the housing 4, the core 5, the coil 6, the bobbin 7, and the cap 8 are arranged coaxially with the axis A of the fuel injection valve 1.
  • the cap 8 has a notch.
  • the terminal 9 is connected to the coil 6 through the notch of the cap 8. When the coil 6 is energized through the terminal 9, an electromagnetic force is generated from the coil 6.
  • the valve device 3 includes a valve seat 12 in which the valve seat inner space portion 11 is provided, an injection hole plate 13 disposed on the downstream side of the fuel flow from the valve seat 12, and a direction along the axis A.
  • a valve body 14 that is displaceable with respect to the valve seat 12, a cylindrical holder 15 that accommodates the valve seat 12, the nozzle hole plate 13, and the valve body 14, and the upstream side of the fuel flow from the valve body 14.
  • a cylindrical fixed rod 16 fixed to the core 5 and a spring 17 which is an elastic body disposed between the valve body 14 and the fixed rod 16.
  • the holder 15 is fixed to the housing 4.
  • the valve seat 12 is fixed to the inner peripheral surface of the holder 15.
  • the nozzle hole plate 13 is fixed to the valve seat 12.
  • the valve seat 12, the injection hole plate 13, the valve body 14, the holder 15, the fixed rod 16 and the spring 17 are arranged coaxially with the axis A of the fuel injection valve 1.
  • the valve seat 12 is arranged on the downstream side of the fuel flow from the core 5.
  • the valve seat 12 is provided with a through hole 12a penetrating from the valve seat inner space portion 11 toward the injection hole plate 13 as a fuel passage.
  • the through hole 12 a is provided coaxially with the axis A.
  • the inner surface of the valve seat inner space portion 11 is continuously formed in a cylindrical sliding surface 18 along the direction in which the valve body 14 is displaced, and in a direction approaching the axis A from the sliding surface 18 toward the through hole 12a.
  • an inclined conical sheet surface 19 That is, a sliding surface 18 along the axis A and a seat surface 19 inclined with respect to the axis A are formed on the inner peripheral portion of the valve seat 12.
  • the valve element 14 is disposed between the core 5 and the seat surface 19 so as to be displaceable.
  • the valve body 14 includes a cylindrical armature 21 that is a movable iron core disposed in the holder 15, and a valve body main body 22 that is fixed to the armature 21.
  • the valve body 22 has a ball 23 inserted into the valve seat inner space 11 and a cylindrical connecting member 24 that connects the armature 21 and the ball 23.
  • the valve body 14 is displaced with respect to the valve seat 12 while guiding the ball 23 to the sliding surface 18.
  • the armature 21 is opposed to the core 5 in the direction along the axis A of the fuel injection valve 1.
  • a fuel passage through which fuel flows is formed between the inner surface of the valve seat inner space 11 and the ball 23.
  • the fuel flows through the fuel passage formed between the inner surface of the valve seat inner space 11 and the ball 23 in the order of the sliding surface 18 and the seat surface 19, and then passes through the through hole 12 a to the nozzle plate 13. .
  • the amount of fuel exiting from the through hole 12 a to the nozzle hole plate 13 is adjusted by the ball 23 contacting the seat surface 19 or the ball 23 moving away from the seat surface 19.
  • a core downstream end face 25 facing the armature 21 is formed.
  • the core downstream end face 25 is orthogonal to the axis A of the fuel injection valve 1.
  • the armature 21 contacts the core downstream end face 25 of the core 5.
  • the nozzle hole plate 13 is fixed to the valve seat 12 by welding.
  • the nozzle hole plate 13 is provided with a plurality of fuel injection holes 26 penetrating the nozzle hole plate 13. The fuel exiting from the through hole 12a of the valve seat 12 to the injection hole plate 13 is injected to the outside from the plurality of fuel injection holes 26.
  • the spring 17 generates an elastic restoring force in a state of being contracted between the fixed rod 16 and the connecting member 24. As a result, the spring 17 biases the valve body 14 in the direction in which the ball 23 contacts the seat surface 19.
  • the amateur 21 is attracted to the core 5. That is, the coil 6 generates an electromagnetic attractive force that attracts the armature 21 to the core 5.
  • the valve body 14 is displaced in a direction away from the seat surface 19 against the urging force of the spring 17.
  • the space in the fixed rod 16, the space in which the spring 17 is disposed, and the space in the connecting member 24 are fuel passages through which fuel flows.
  • the fuel flows through the fuel passage in the order of the fixed rod 16, the spring 17, and the connecting member 24, and then flows into the valve seat inner space 11 of the valve seat 12.
  • FIG. 2 is an enlarged cross-sectional view showing the amateur 21 of FIG.
  • FIG. 3 is a top view showing the amateur 21 of FIG.
  • a convex portion 31 and a flat surface forming portion 32 positioned on the radially outer side than the convex portion 31 are provided.
  • the shape of the convex portion 31 when viewed along the axis B of the amateur 21 is an annular shape along the circumferential direction of the amateur 21, as shown in FIG.
  • the convex part 31 is arrange
  • the convex part 31 is provided in the inner peripheral part in the edge part by the side of the core 5 of the armature 21.
  • the outline of the convex portion 31 when the armature 21 is cut along a plane including the axis B of the armature 21 is an arcuate curve that continues from the inner peripheral surface of the armature 21 and rises toward the core 5 side.
  • the outline of the convex portion 31 when the armature 21 is cut along a plane including the axis B of the armature 21 has an arc shape having a radius r.
  • the plane forming part 32 has a first orthogonal plane part 33 that continues from the convex part 31 radially outward.
  • the first orthogonal plane portion 33 is formed over the entire circumference of the armature 21 on the radially outer side than the convex portion 31.
  • the first orthogonal plane portion 33 is parallel to a plane orthogonal to the axis B of the armature 21.
  • the convex portion 31 projects toward the core 5 from the position of the first orthogonal plane portion 33 in the direction along the axis B of the amateur 21.
  • the armature 21 is displaced in a direction along the axis A of the fuel injection valve 1 while being guided by the holder 15.
  • a gap s exists between the outer peripheral surface of the amateur 21 and the inner peripheral surface of the holder 15.
  • the armature 21 may come into contact with the core downstream end face 25 while being inclined with respect to the axis A of the fuel injection valve 1.
  • the height of the convex portion 31 from the position of the first orthogonal plane portion 33 is set based on the maximum inclination of the amateur 21 with respect to the axis A. As a result, even when the armature 21 is in contact with the core downstream side end face 25 in a state tilted with respect to the axis A, the other parts of the armature 21 other than the convex portions 31 are kept away from the core downstream side end face 25. As it is, only the convex part 31 contacts the core downstream side end face 25.
  • the convex portion 31 when the amateur 21 is cut along a plane including the axis B of the amateur 21 is an arcuate curve, when the fuel injection valve 1 is in the open state, the convex portion 31 is convex.
  • the part 31 contacts the core downstream end face 25 in a line contact state.
  • the armature 21 comes into contact with the core downstream end face 25 of the core 5.
  • the convex portion 31 is in contact with the core downstream end surface 25 while the other portions of the armature 21 other than the convex portion 31 are separated from the core downstream end surface 25. Since the outline of the convex portion 31 is an arcuate curve, the convex portion 31 contacts the core downstream end surface 25 in a line contact state.
  • the fuel that has flowed into the valve seat space 11 from the fuel passage in the connecting member 24 reaches the seat surface 19 through the fuel passage formed between the ball 23 and the sliding surface 18. Thereafter, the fuel flows through the fuel passage formed between the ball 23 and the seat surface 19 and flows to the through hole 12a. Thereafter, the fuel flows from the through hole 12 a to the injection hole plate 13 and is injected to the outside through the plurality of fuel injection holes 26.
  • the convex portion 31 and the first orthogonal plane portion 33 continuous from the convex portion 31 are provided at the end portion on the core 5 side of the armature 21, and the axis B of the armature 21 is Since the contour line of the convex portion 31 in the plane including it is an arc-shaped curve continuous from the inner peripheral surface of the armature 21, when the convex portion 31 of the armature 21 contacts the core 5, the convex portion 31 and the core 5 The contact state with can be changed to a line contact state. Thereby, the contact area between the armature 21 and the core 5 can be reduced, and the squeeze force acting between the armature 21 and the core 5 when the armature 21 is closed from the core 5 can be reduced. .
  • the valve body 14 can be easily displaced toward the seat surface 19, and deterioration of responsiveness when the fuel injection valve 1 is closed can be suppressed.
  • the convex part 31 since the convex part 31 is provided, the volume of the space which exists between the core downstream side end surface 25 and the plane formation part 32 on the radial direction outer side than the convex part 31 can be enlarged, and the core downstream side The fluid damper effect by the fuel which exists between the end surface 25 and the plane formation part 32 can be enlarged. Thereby, the resistance force with respect to the displacement of the valve body 14 in the direction approaching the core 5 can be increased, and the speed of the valve body 14 when the valve is opened can be reduced. Therefore, it is possible to reduce the operation noise when the valve is opened.
  • the armature 21 may come into contact with the core 5 while the armature 21 is inclined with respect to the axis A of the fuel injection valve 1.
  • the degree of inclination of the armature 21 when contacting the core 5 differs for each individual fuel injection valve 1.
  • the finishing condition of the flat surface of the convex portion is also different for each individual fuel injection valve 1. Therefore, when a flat surface is provided on the convex portion 31 of the armature 21, the variation in the operating sound at the time of valve opening when the armature 21 collides with the core 5 becomes large for each individual fuel injection valve 1.
  • the amateur 21 contacts the core 5 at the outermost peripheral portion of the flat surface of the convex portion, and the inclination of the amateur 21 is small.
  • the contact position is determined by the finishing degree of the flatness of the core downstream end surface 25 of the core 5 and the flat surface of the convex portion. Due to the variation, the variation of the operation sound generated when the armature 21 collides with the core 5 becomes large for each individual fuel injection valve 1.
  • the outline of the convex portion 31 on the plane including the axis B of the armature 21 is an arcuate curve continuous from the inner peripheral surface of the armature 21, so that the fuel injection valve Regardless of the inclination of the armature 21 with respect to the axis A, the variation in the contact state between the core downstream end face 25 and the convex portion 31 is reduced. Thereby, the dispersion
  • the convex portion 31 of the armature 21 is provided with a flat surface
  • the outermost peripheral portion of the flat surface of the convex portion 31 comes into contact with the core downstream end surface 25 of the core 5.
  • the convex portion 31 is located at a radially inner position of the core 5 with respect to the position of the outermost peripheral portion of the flat surface of the convex portion 31. Contacts the core 5.
  • the contour line of the convex portion 31 is an arc-shaped curve as compared with the case where the transmission path from the contact position of the convex portion 31 with the core 5 to the outer peripheral surface of the core 5 has a flat surface.
  • the length is longer. Therefore, by making the outline of the convex portion 31 on the plane including the axis B of the armature 21 into an arcuate curve, the vibration attenuation in the core 5 can be increased, and the operation sound at the time of opening the valve can be more reliably performed. Can be suppressed.
  • the convex part 31 is arrange
  • FIG. 4 is an enlarged cross-sectional view of a main part showing an armature 21 and a core 5 of a fuel injection valve according to Embodiment 2 of the present invention.
  • the plane forming part 32 has a first orthogonal plane part 33 that continues from the convex part 31 and a second orthogonal plane part 34 that is located radially outside the first orthogonal plane part 33.
  • the second orthogonal plane part 34 is formed over the entire circumference of the armature 21 on the outer side in the radial direction than the first orthogonal plane part 33. Further, the first orthogonal plane part 33 and the second orthogonal plane part 34 are parallel to a plane orthogonal to the axis B of the armature 21.
  • the position of the second orthogonal plane part 34 is farther from the core downstream end face 25 than the position of the first orthogonal plane part 33. That is, the second gap g2, which is the distance between the second orthogonal plane part 34 and the core downstream end face 25, is the distance between the first orthogonal plane part 33 and the core downstream end face 25. 1 is larger than the gap g1. Accordingly, in the space E existing radially outside the convex portion 31, the distance between the plane forming portion 32 and the core downstream side end face 25 is such that the first orthogonal plane portion 33 and the second orthogonal plane portion 34 have the same distance. It spreads stepwise toward the radially outer side of the armature 21 in order. Other configurations and operations are the same as those in the first embodiment.
  • the second gap g ⁇ b> 2 which is the distance between the second orthogonal plane part 34 and the core downstream side end face 25, has the first orthogonal plane part 33 and the core downstream side end face 25.
  • the presence of the second gap g2 can make it difficult for other portions of the armature 21 other than the convex portion 31 to contact the core downstream side end face 25.
  • the portion closer to the convex portion 31 in the plane forming portion 32 is less likely to contact the core downstream side end surface 25, the position of the first orthogonal plane portion 33 can be brought closer to the core downstream side end surface 25, The first gap g1 that is the distance between the first orthogonal plane portion 33 and the core downstream side end face 25 can be reduced. Thereby, the electromagnetic attractive force between the core 5 and the armature 21 can be increased, and the responsiveness when the fuel injection valve 1 is opened can be improved.
  • the number of orthogonal plane portions included in the plane forming portion 32 is two, that is, the first orthogonal plane portion 33 and the second orthogonal plane portion 34, but the axis B of the amateur 21
  • the plane forming part 32 may include three or more orthogonal plane parts parallel to a plane orthogonal to the plane forming part 32.
  • the second orthogonal plane part 34 is provided radially outside the first orthogonal plane part 33, and another orthogonal plane part is provided radially outside the second orthogonal plane part 34.
  • each orthogonal plane portion of the plane forming portion 32 of the armature 21 is formed so that the distance between the plane forming portion 32 and the core downstream side end face 25 gradually increases outward in the radial direction of the armature 21. It is formed at the end on the core 5 side.
  • FIG. 5 is an enlarged cross-sectional view of a main part showing an armature 21 and a core 5 of a fuel injection valve according to Embodiment 3 of the present invention.
  • an amateur-side tapered surface portion 41 is provided that is located on the radially outer side of the plane forming portion 32.
  • the amateur-side tapered surface portion 41 is formed over the entire circumference of the armature 21 on the radially outer side than the plane forming portion 32.
  • the amateur side tapered surface portion 41 is inclined with respect to the axis B of the amateur 21.
  • the amateur-side tapered surface portion 41 is inclined in a direction away from the core 5 from the plane forming portion 32 toward the radially outer side.
  • only the first orthogonal plane portion 33 is included in the plane forming portion 32, and the amateur-side tapered surface portion 41 continues from the core 5 toward the radially outer side continuously from the first orthogonal plane portion 33. Inclined away.
  • the distance between the armature-side tapered surface portion 41 and the core downstream-side end surface 25 continuously spreads toward the radially outer side of the armature 21. Yes.
  • Other configurations and operations are the same as those in the first embodiment.
  • similar to the convex part 31 among the edge parts by the side of the core 5 of the amateur 21 can be brought close to the core downstream end surface 25, and the electromagnetic attraction force between the core 5 and the amateur 21 can be increased.
  • the armature side taper surface portion 41 is continuously inclined, a step can be eliminated in the armature side taper surface portion 41, and loss of electromagnetic attraction force at the step can be eliminated. Thereby, the electromagnetic attractive force between the core 5 and the armature 21 can be further increased, and the responsiveness when the fuel injection valve 1 is opened can be further improved.
  • FIG. 6 is a sectional view showing an armature 21 of a fuel injection valve according to Embodiment 4 of the present invention.
  • FIG. 7 is a top view showing the amateur 21 of FIG.
  • a plurality of concave portions 42 are provided in the convex portion 31 that is annularly arranged in the circumferential direction of the amateur 21.
  • the plurality of concave portions 42 are provided on the convex portion 31 so as to be separated from each other in the circumferential direction of the amateur 21.
  • segmented by the recessed part 42 about the circumferential direction of the armature 21 is provided in the edge part by the side of the core 5 of the armature 21. As shown in FIG.
  • a plurality of convex portions 31 are provided at the end portion of the armature 21 on the side of the armature 21 at intervals from each other via the concave portions 42 in the circumferential direction of the armature 21.
  • six concave portions 42 are provided on the convex portion 31, and the six convex portions 31 divided by the concave portion 42 are provided on the end portion on the core 5 side of the armature 21.
  • each recess 42 is continuous with the first orthogonal plane portion 33.
  • the bottom surface 43 of each recess 42 is also continuous with the inner peripheral surface of the amateur 21.
  • the bottom surface 43 of each recess 42 is parallel to a plane orthogonal to the axis B of the armature 21. That is, the bottom surface 43 of each recess 42 is on the same plane as the first orthogonal plane portion 33.
  • Other configurations are the same as those in the first embodiment.
  • the plurality of concave portions 42 are provided in the convex portion 31, but the present invention is not limited to this, and only one concave portion 42 may be provided in the convex portion 31. Even in this case, the contact area of the armature 21 with the core 5 can be reduced, and the responsiveness when the valve is closed can be improved.
  • the bottom surface 43 of the recess 42 exists on the same plane as the first orthogonal plane portion 33, but the bottom surface 43 of the recess 42 is positioned downstream of the core from the position of the first orthogonal plane portion 33. You may form in the position close
  • FIG. FIG. 8 is a sectional view showing an armature 21 of a fuel injection valve according to Embodiment 5 of the present invention.
  • FIG. 9 is a top view showing the amateur 21 of FIG.
  • a plurality of convex portions 31 are arranged at intervals in the circumferential direction of the amateur 21.
  • the shape of the outer surface of each of the plurality of convex portions 31 is the shape of a spherical portion.
  • a plurality of convex portions 31 are arranged on a circle centering on the axis B of the amateur 21, and the outer surfaces of the plurality of convex portions 31 have the same shape.
  • Other configurations are the same as those of the fourth embodiment.
  • the some convex part 31 is arrange
  • FIG. 10 is an essential part enlarged cross-sectional view showing an armature 21 and a core 5 of a fuel injection valve according to Embodiment 6 of the present invention.
  • the core downstream side end surface 25 formed at the end portion of the core 5 on the armature 21 side is an annular core side orthogonal plane portion 52 surrounding the axis A of the core 5, and radially inward of the core side orthogonal plane portion 52. It has a conical core side taper surface 51 located.
  • the core-side orthogonal plane portion 52 is parallel to a plane orthogonal to the axis A of the core 5.
  • the core side tapered surface portion 51 is inclined with respect to the axis A of the core 5. Further, the core side taper surface portion 51 is inclined in a direction away from the armature 21 from the core side orthogonal plane portion 52 toward the inside in the radial direction of the core 5.
  • a hollow portion that is recessed toward the axis A of the core 5 is formed by the core-side tapered surface portion 51.
  • the convex portion 31 faces the core-side tapered surface portion 51 in the direction along the axis A of the core 5.
  • the core-side tapered surface portion 51 that is inclined in the direction away from the armature 21 toward the radially inner side of the core 5 is provided at the end portion on the armature 21 side of the core 5, and the convex portion 31 is formed in the core 31. Since the armature 21 is opposed to the side taper surface portion 51, even when the armature 21 is in contact with the core 5 with the axis B of the armature 21 being eccentric with respect to the axis A of the core 5, the convex portion 31 is the core side taper surface portion 51.
  • the armature 21 can be automatically displaced with respect to the core 5 in a direction to reduce the eccentricity between the axis B of the armature 21 and the axis A of the core 5.
  • the armature 21 is likely to bounce with respect to the core 5 when the convex portion 31 collides with the core downstream end face 25 when the valve is opened.
  • the convex portion 31 collides with the core-side tapered surface portion 51 when the valve is opened, the convex portion 31 slides along the core-side tapered surface portion 51, so that the amateur 21 is less likely to bounce with respect to the core 5.
  • the core-side tapered surface portion 51 at the end portion of the core 5 on the armature 21 side, it is possible to further improve the responsiveness when the valve is opened. Furthermore, when the convex part 31 slides along the core side taper surface part 51, since the loss of friction arises between the convex part 31 and the core side taper surface part 51, energy transmitted to the core 5 from the amateur 21 should be made small. Therefore, it is possible to further reduce the operation noise when the valve is opened.
  • the core downstream side end face 25 includes the core side orthogonal plane part 52 and the core side tapered plane part 51, but the core side orthogonal plane part 52 may not be provided.
  • FIG. 11 is an enlarged cross-sectional view of a main part showing an armature 21 and a core 5 of a fuel injection valve according to Embodiment 6 of the present invention.
  • FIG. 12 is a top view showing the amateur 21 of FIG.
  • a curved surface portion 53 that smoothly connects the convex portion 31 and the first orthogonal plane portion 33 is provided between the convex portion 31 and the first orthogonal plane portion 33.
  • the radius R of the circular arc that is the curved surface portion 53 is larger than the radius r of the circular arc that is the outline of the convex portion 31 in the plane including the axis B of the amateur 21.
  • Other configurations and operations are the same as those in the sixth embodiment.
  • the curved surface portion 53 that smoothly connects the convex portion 31 and the first orthogonal plane portion 33 is provided between the convex portion 31 and the first orthogonal plane portion 33,
  • the curved portion 53 can suppress the stagnation of the fuel flow at the boundary between the convex portion 31 and the first orthogonal plane portion 33.
  • the fall of the pressure in the space E by the pressure loss of the fuel stagnation part can be suppressed, and the fall of the fluid damper effect at the time of valve opening can be suppressed.
  • the curved surface portion 53 that smoothly connects the convex portion 31 and the first orthogonal plane portion 33 is applied to the amateur 21 of the sixth embodiment.
  • the convex portion 31 and the first orthogonal plane portion are used.
  • the curved surface portion 53 that smoothly connects the portion 33 may be applied to the amateur 21 of the first to fifth embodiments. Even in this way,
  • a curved surface portion that smoothly connects the first orthogonal plane portion 33 and the second orthogonal plane portion 34 is provided between the first orthogonal plane portion 33 and the second orthogonal plane portion 34. It may be provided. Even in this case, the stagnation of the fuel flow at the boundary between the first orthogonal plane portion 33 and the second orthogonal plane portion 34 can be suppressed, and the pressure drop in the space E can be suppressed. . Further, in the third embodiment, a curved surface portion that smoothly connects the flat surface forming portion 32 and the amateur side tapered surface portion 41 may be provided between the flat surface forming portion 32 and the amateur side tapered surface portion 41. The stagnation of the fuel flow at the boundary between the flat surface forming portion 32 and the amateur side tapered surface portion 41 can be suppressed, and the pressure drop in the space E can be suppressed.
  • the same configuration as that of the second embodiment in which the plane forming portion 32 has a plurality of orthogonal plane portions may be applied to the amateur 21 of the third to seventh embodiments.
  • the amateur side taper surface 41 similar to the third embodiment may be applied to the amateur 21 of the fourth to seventh embodiments.
  • core side tapered surface portion 51 similar to that of the sixth embodiment may be applied to the core 5 of the second to fifth embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
PCT/JP2016/082956 2016-11-07 2016-11-07 燃料噴射弁 WO2018083795A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680090415.XA CN109891081B (zh) 2016-11-07 2016-11-07 燃料喷射阀
JP2018548530A JP6692446B2 (ja) 2016-11-07 2016-11-07 燃料噴射弁
PCT/JP2016/082956 WO2018083795A1 (ja) 2016-11-07 2016-11-07 燃料噴射弁

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/082956 WO2018083795A1 (ja) 2016-11-07 2016-11-07 燃料噴射弁

Publications (1)

Publication Number Publication Date
WO2018083795A1 true WO2018083795A1 (ja) 2018-05-11

Family

ID=62075863

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/082956 WO2018083795A1 (ja) 2016-11-07 2016-11-07 燃料噴射弁

Country Status (3)

Country Link
JP (1) JP6692446B2 (zh)
CN (1) CN109891081B (zh)
WO (1) WO2018083795A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020145112A1 (ja) * 2019-01-08 2020-07-16 株式会社デンソー 燃料噴射弁
JP6773927B1 (ja) * 2020-01-24 2020-10-21 株式会社ケーヒン 電磁式燃料噴射弁
CN112539125A (zh) * 2019-09-20 2021-03-23 株式会社京浜 电磁式燃料喷射阀
CN112840117A (zh) * 2018-10-23 2021-05-25 三菱电机株式会社 电磁式燃料喷射阀
JP2021124075A (ja) * 2020-02-06 2021-08-30 日立Astemo株式会社 電磁式燃料噴射弁
WO2023223565A1 (ja) * 2022-05-20 2023-11-23 日立Astemo株式会社 電磁式燃料噴射弁
JP7482073B2 (ja) 2021-03-22 2024-05-13 日立Astemo株式会社 電磁式燃料噴射弁

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021201028A1 (ja) * 2020-03-31 2021-10-07 株式会社デンソー 燃料噴射弁

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005240732A (ja) * 2004-02-27 2005-09-08 Keihin Corp 電磁式燃料噴射弁およびその製造方法
JP2007205234A (ja) * 2006-02-01 2007-08-16 Denso Corp 燃料噴射弁
JP2012246789A (ja) * 2011-05-25 2012-12-13 Denso Corp 燃料噴射弁
US20130299611A1 (en) * 2010-10-19 2013-11-14 Anatoliy Lyubar Valve Assembly for an Injection Valve and Injection Valve
US20140346382A1 (en) * 2013-05-24 2014-11-27 Robert Bosch Gmbh Electromagnetically actuatable valve
JP2015105592A (ja) * 2013-11-29 2015-06-08 愛三工業株式会社 燃料噴射弁

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006307870A (ja) * 2005-03-31 2006-11-09 Denso Corp 燃料ポンプ用電磁弁
CN101506511B (zh) * 2006-09-25 2011-10-26 株式会社日立制作所 燃料喷射阀
JP5048617B2 (ja) * 2008-09-17 2012-10-17 日立オートモティブシステムズ株式会社 内燃機関用の燃料噴射弁
CN103890370B (zh) * 2011-10-26 2016-08-24 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
JP6167992B2 (ja) * 2014-05-28 2017-07-26 株式会社デンソー 燃料噴射弁及びその製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005240732A (ja) * 2004-02-27 2005-09-08 Keihin Corp 電磁式燃料噴射弁およびその製造方法
JP2007205234A (ja) * 2006-02-01 2007-08-16 Denso Corp 燃料噴射弁
US20130299611A1 (en) * 2010-10-19 2013-11-14 Anatoliy Lyubar Valve Assembly for an Injection Valve and Injection Valve
JP2012246789A (ja) * 2011-05-25 2012-12-13 Denso Corp 燃料噴射弁
US20140346382A1 (en) * 2013-05-24 2014-11-27 Robert Bosch Gmbh Electromagnetically actuatable valve
JP2015105592A (ja) * 2013-11-29 2015-06-08 愛三工業株式会社 燃料噴射弁

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112840117B (zh) * 2018-10-23 2022-10-11 三菱电机株式会社 电磁式燃料喷射阀
CN112840117A (zh) * 2018-10-23 2021-05-25 三菱电机株式会社 电磁式燃料喷射阀
JP2020112044A (ja) * 2019-01-08 2020-07-27 株式会社デンソー 燃料噴射弁
US11976618B2 (en) 2019-01-08 2024-05-07 Denso Corporation Fuel injection valve
JP7338155B2 (ja) 2019-01-08 2023-09-05 株式会社デンソー 燃料噴射弁
WO2020145112A1 (ja) * 2019-01-08 2020-07-16 株式会社デンソー 燃料噴射弁
CN113260781B (zh) * 2019-01-08 2023-02-17 株式会社电装 燃料喷射阀
CN113260781A (zh) * 2019-01-08 2021-08-13 株式会社电装 燃料喷射阀
JP2021046845A (ja) * 2019-09-20 2021-03-25 株式会社ケーヒン 電磁式燃料噴射弁
CN112539125B (zh) * 2019-09-20 2022-08-02 日立安斯泰莫株式会社 电磁式燃料喷射阀
US11421635B2 (en) 2019-09-20 2022-08-23 Hitachi Astemo, Ltd. Electromagnetic fuel injection valve
CN112539125A (zh) * 2019-09-20 2021-03-23 株式会社京浜 电磁式燃料喷射阀
JP2021116717A (ja) * 2020-01-24 2021-08-10 株式会社ケーヒン 電磁式燃料噴射弁
JP6773927B1 (ja) * 2020-01-24 2020-10-21 株式会社ケーヒン 電磁式燃料噴射弁
US11415093B2 (en) 2020-02-06 2022-08-16 Hitachi Astemo, Ltd. Electromagnetic fuel injection valve
JP2021124075A (ja) * 2020-02-06 2021-08-30 日立Astemo株式会社 電磁式燃料噴射弁
JP7482073B2 (ja) 2021-03-22 2024-05-13 日立Astemo株式会社 電磁式燃料噴射弁
WO2023223565A1 (ja) * 2022-05-20 2023-11-23 日立Astemo株式会社 電磁式燃料噴射弁

Also Published As

Publication number Publication date
CN109891081B (zh) 2021-01-19
CN109891081A (zh) 2019-06-14
JPWO2018083795A1 (ja) 2019-02-14
JP6692446B2 (ja) 2020-05-13

Similar Documents

Publication Publication Date Title
WO2018083795A1 (ja) 燃料噴射弁
US9920726B2 (en) Fuel injection valve
JP4790441B2 (ja) 電磁燃料噴射弁及びその組立て方法
JP6175475B2 (ja) 電磁式燃料噴射弁
JP5152024B2 (ja) 燃料噴射弁
JP6355765B2 (ja) 燃料噴射弁
JP5063789B2 (ja) 電磁燃料噴射弁及びその組立て方法
JP4161217B2 (ja) 燃料噴射弁
JP6233481B2 (ja) 燃料噴射弁
JP7152274B2 (ja) 燃料噴射装置
JP6275902B2 (ja) 燃料噴射装置
JP4406933B2 (ja) 燃料噴射弁
JP6827535B2 (ja) インジェクタ
JP6453381B2 (ja) 燃料噴射装置
JP6692451B2 (ja) 燃料噴射弁
JP6698802B2 (ja) 燃料噴射装置
JP6151336B2 (ja) 燃料噴射装置
JP2021063485A (ja) 燃料噴射弁
JP4158038B2 (ja) 電磁弁
JP2012225185A (ja) 燃料噴射弁
JP4191760B2 (ja) 燃料噴射弁
JP2018013051A (ja) 燃料噴射弁
JP2022133123A (ja) 電磁式燃料噴射弁
JP2022146786A (ja) 電磁式燃料噴射弁
JP2009103046A (ja) 内燃機関用燃料噴射弁

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2018548530

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16920479

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16920479

Country of ref document: EP

Kind code of ref document: A1