WO2012108524A1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

Info

Publication number
WO2012108524A1
WO2012108524A1 PCT/JP2012/053083 JP2012053083W WO2012108524A1 WO 2012108524 A1 WO2012108524 A1 WO 2012108524A1 JP 2012053083 W JP2012053083 W JP 2012053083W WO 2012108524 A1 WO2012108524 A1 WO 2012108524A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
nozzle hole
spray
orifice plate
nozzle
Prior art date
Application number
PCT/JP2012/053083
Other languages
English (en)
Japanese (ja)
Inventor
長岐　剛
謙治 酒井
孝三 田中
悠一郎 後藤
Original Assignee
ボッシュ株式会社
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 ボッシュ株式会社 filed Critical ボッシュ株式会社
Publication of WO2012108524A1 publication Critical patent/WO2012108524A1/fr

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
    • 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
    • F02M61/1853—Orifice plates

Definitions

  • the present invention relates to a fuel injection valve, and more particularly to a fuel injection valve suitable for a port injection type internal combustion engine, which is intended to reduce spray penetration.
  • a plurality of injection holes are formed in the same plate, and sprays respectively ejected from some of the plurality of injection holes are formed into one spray. At the same time, the sprays ejected from the remaining nozzle holes are formed into one separate spray so that two separate sprays can be obtained for the port injection type internal combustion engine.
  • a fuel injection valve has been proposed (see, for example, Patent Document 1).
  • the present invention has been made in view of the above circumstances, and provides a fuel injection valve capable of atomizing a spray with a relatively simple configuration and obtaining a butterfly spray having an appropriate penetrating force. To do.
  • a plurality of injection holes are formed in the orifice plate of the fuel injection valve, and a generally butterfly-like spray is formed at a position facing the orifice plate on the downstream side of the plurality of injection holes.
  • a spray forming method for forming a retaining form In the orifice plate, one axis along the diameter direction of the orifice plate is an X axis, and one axis along the diameter direction of the orifice plate perpendicular to the X axis is a Y axis, with respect to the X axis and the Y axis.
  • a central axis of the fuel injection valve orthogonal to each other is defined as a Z axis, A circle centered on an arbitrary point on the Y axis within a range that allows the plurality of nozzle holes to intersect with the X, Y, and Z axes or to allow fuel to flow into the plurality of nozzle holes 6 or an even number on the same circumference of the nozzle hole arrangement circle, which is arranged symmetrically with respect to the Y axis as a line symmetry axis and faces the orifice plate downstream of the plurality of nozzle holes.
  • the roughly butterfly spray is On the downstream side of the orifice plate, a horizontal axis parallel to the X axis is taken as the X ′ axis, and a vertical axis parallel to the Y axis and intersecting the Z axis is taken as the Y ′ axis, and a plane perpendicular to the Z axis is measured. Based on the spray amount at each point on the measurement X′Y ′ plane obtained on the measurement X′Y ′ plane, the spray amount at each point is a large spray amount.
  • the spray amount at each point is 1 / of the quasi-maximum flow rate.
  • the spray formed around two regions exceeding the quasi-maximum flow rate at a flow rate intermediate position of 2 is in a combined state, At a position corresponding to the flow middle position of the approximately butterfly-shaped spray, a boundary line between the approximately butterfly-shaped spray and the outside appearing on the measurement X′Y ′ plane, and an area formed by the boundary line.
  • the distance between two intersections intersecting the perpendicular bisector with respect to the virtual line connecting the geometric centroids of the two regions divided by the Y ′ axis is h1
  • the distance corresponding to the geometric centroid is A direction perpendicular to a virtual line connecting the geometric center of gravity between two intersecting points where a virtual line orthogonal to a virtual line connecting two points on the measurement X′Y ′ plane intersects the boundary line
  • h2 is the distance perpendicular to a virtual line connecting the geometric center of gravity between two intersecting points where a virtual line orthogon
  • the X′Y ′ for measurement corresponding to the two geometric center-of-gravity points with respect to the position of the X′-axis where the sum of the respective integrated amounts exceeds 0.1 of the total spray flow rate
  • the X′-axis direction of two intersections of a line obtained by extrapolating an imaginary line connecting two points on the plane and the boundary line between the roughly butterfly-shaped spray and the outside in the X′Y ′ plane for measurement What is located inside is provided.
  • a fuel injection valve that enables fuel injection in two directions, In an orifice plate in which a plurality of nozzle holes are formed, one axis along the diameter direction of the orifice plate is an X axis, and one axis along the diameter direction of the orifice plate perpendicular to the X axis is a Y axis, A central axis of the fuel injection valve orthogonal to the X axis and the Y axis is defined as a Z axis, The plurality of nozzle holes are circles centered on any point on the Y axis within a range that allows the fuel to flow into the nozzle holes at the intersection of the X, Y, and Z axes.
  • the Y axis is a line symmetry axis and the line symmetry is arranged.
  • the nozzle holes that are closest to the sub-X axis on the upper and lower sides of the virtual sub-X axis that pass through the center of the nozzle hole arrangement circle, are orthogonal to the Y axis, and coincide with or parallel to the X axis If the nozzle hole is defined as an outer nozzle hole that is closest to the Y axis,
  • the layout angle formed by the line connecting the point where the central axis of the outer nozzle hole intersects the inner surface of the orifice plate and the center of the nozzle hole arrangement circle and the sub X axis is set to 60 degrees or more, The layout angle formed by the line connecting the point where the central axis of the nozzle hole intersects the plane where the orifice plate is located and the center of
  • the plurality of nozzle holes on one side of the Y-axis are formed such that a central axis of each nozzle hole is inclined with a predetermined nozzle hole angle with respect to the Z-axis direction.
  • a twist angle formed by a line obtained by projecting the central axis of the nozzle plate onto the orifice plate and the sub-X axis is set smaller than the layout angle of each nozzle hole.
  • the atomization of the spray can be obtained with a relatively simple configuration, and an appropriate penetrating spray can be obtained, and unnecessary fuel adhesion to the wall surface in the intake pipe is reduced.
  • HC hydrocarbon
  • FIG. 1 is a longitudinal sectional view of a port injection type internal combustion engine in which a fuel injection valve according to an embodiment of the present invention is used. It is the schematic diagram which showed typically the cross section of the horizontal direction of the upper part of the internal combustion engine shown by FIG. It is the schematic diagram which showed typically the injection state by the fuel injection valve in embodiment of this invention from the side surface side. It is the schematic diagram which showed typically the injection state by the fuel injection valve in embodiment of this invention from the side which faces a nozzle part to the front. It is a longitudinal cross-sectional view of the nozzle part of the fuel injection valve in embodiment of this invention. It is a top view of the orifice plate used for the fuel injection valve in embodiment of this invention.
  • FIG. 7 is a sectional view taken along line AA in FIG.
  • FIGS. 1 to 4 an internal combustion engine in which a fuel injection valve according to an embodiment of the present invention is used will be described with reference to FIGS. 1 to 4.
  • the internal combustion engine 1 shown in FIG. 1 is of a so-called port injection type, and its configuration is basically the same as that of the prior art.
  • the internal combustion engine 1 includes a cylinder block 2, a cylinder head 3, and a piston 4.
  • the piston 4 is slidably housed in the cylinder block 2 and a combustion chamber 5 is formed. (See FIG. 1).
  • the combustion chamber 5 communicates with an intake pipe 6 and an exhaust pipe 7 formed in the cylinder head 3.
  • the cylinder head 3 includes two intake valves 8A and 8B that control the communication between the intake pipe 6 and the combustion chamber 5, and two exhaust valves 9A and 9B that control the communication between the exhaust pipe 7 and the combustion chamber 5.
  • the intake valves 8A and 8B that control the communication between the intake pipe 6 and the combustion chamber 5
  • two exhaust valves 9A and 9B that control the communication between the exhaust pipe 7 and the combustion chamber 5.
  • the fuel injection valve 20 in the embodiment of the present invention is disposed upstream of the intake pipe 6.
  • the fuel injection valve 20 is disposed at an appropriate position where a butterfly-shaped spray (a two-dot chain line portion in each of FIGS. 1 to 4), which will be described later, is directed toward the intake valves 8A and 8B.
  • the cylinder head 3 is provided with a spark plug 10 so as to face the upper center portion of the combustion chamber 5 (see FIG. 1).
  • FIG. 5 is a vertical cross-sectional view at a portion where the two nozzle holes 27 are located in the diameter direction of the orifice plate 23.
  • the orifice plate 23 according to the embodiment of the present invention is formed in a lid shape, that is, a flat bottomed cylindrical shape in other words (see FIGS. 6 and 7), and is a disc.
  • a plurality of nozzle holes that is, in the embodiment of the present invention, eight nozzle holes 27-1 to 27-8 are drilled as described below in the bottom portion 23 a formed in a shape. (See FIG. 6). In the following description, the description common to the nozzle holes 27-1 to 27-8 will be described as the nozzle hole 27 as appropriate.
  • three-dimensional linear orthogonal coordinates based on the X axis, the Y axis, and the Z axis are defined. That is, for example, on the surface of the bottom 23a located on the inner side of the fuel injection valve 20 (see FIG. 6), one axis along the radial direction of the orifice plate 23 is the X axis, orthogonal to the X axis, and the orifice One axis along the radial direction of the plate 23 is defined as the Y axis, and the X axis and the central axis of the fuel injection valve 20 orthogonal to the Y axis are defined as the Z axis.
  • the Y axis the X axis and the central axis of the fuel injection valve 20 orthogonal to the Y axis are defined as the Z axis.
  • the X axis is the left-right direction of the paper
  • the Y axis is the vertical direction of the paper
  • the Z axis is the front / back direction of the paper
  • the Z axis passes through the center of the orifice plate 23.
  • the eight nozzle holes 27-1 to 27-8 in the embodiment of the present invention have virtual nozzle hole arrangement circles centering on the intersections of the X axis, the Y axis, and the Z axis (see FIG. 6 (see the dotted circle), the Y axis is symmetrically arranged with the Y axis as the axis of line symmetry.
  • the left-right symmetry here is not in a purely mathematical sense, and allows a slight error due to the manufacturing accuracy of each nozzle hole 27.
  • the allowable error (deviation) size and range is a range in which the butterfly spray by the fuel injection valve 20 in the embodiment of the present invention can be obtained in a desired shape and size.
  • the center of the above-described virtual nozzle hole arrangement circle is not limited to the intersection of the X axis, the Y axis, and the Z axis, and the Y axis is within a range in which the injection from the nozzle hole 27 is normally performed. It may be set at any point above.
  • the center of the virtual nozzle hole arrangement circle is set at an arbitrary point on the Y axis as described above, the nozzle hole 27 is orthogonal to the Y axis for convenience of the following description.
  • a virtual axis that coincides with or is parallel to the X axis is defined as the secondary X axis, and in the following description, the center of the nozzle hole arrangement circle is at the intersection of the secondary X axis and the Y axis.
  • the secondary XY coordinate plane formed by the secondary X-axis and the Y-axis is divided into first to fourth quadrants according to a normal mathematical definition as necessary. . That is, in the sub XY coordinate plane of FIG. 6, the coordinate center, that is, the region of the sub X axis on the right side from the intersection of the sub X axis, the Y axis, and the Z axis is X> 0, the coordinate The sub-X-axis region on the left side of the paper from the center is sub-X ⁇ 0, the Y-axis region on the upper side of the paper from the coordinate center is Y> 0, and the Y-axis region on the lower side of the paper is Y ⁇ 0.
  • the region of sub X> 0 and Y> 0 is in the first quadrant, the sub X ⁇ 0, and the region of Y> 0 is in the second quadrant, sub X ⁇ 0, and Y ⁇ 0. Is the third quadrant, the sub- X> 0, and the region where Y ⁇ 0 is the fourth quadrant.
  • the nozzle hole angle ⁇ INC, the layout angle ⁇ LA, and the twist angle ⁇ TW of the nozzle hole 27 will be described.
  • the layout angle ⁇ LA, the nozzle hole angle ⁇ INC, and the twist angle ⁇ TW are respectively determined for the nozzle holes 27-1 to 27-4 in the first quadrant and the fourth quadrant of the sub XY coordinate plane.
  • the remaining nozzle holes 27-5 to 27-8 are determined in the same manner.
  • the layout angle ⁇ LA and nozzle hole angle ⁇ INC of the nozzle holes 27-1 to 27-4 in the first and fourth quadrants will be described below.
  • the twist angle ⁇ TW will be described.
  • the nozzle hole angle ⁇ INC is a virtual axis passing through the center axis of the nozzle hole 27, that is, the center of the nozzle hole 29, for example, a line (indicated by a one-dot chain line in FIG. It is determined as an angle between the central axis) and the Z axis.
  • the nozzle hole angle ⁇ INC is a parameter that makes it possible to adjust the spread of the butterfly spray in the Y-axis direction. More specifically, as the nozzle hole angle ⁇ INC increases, the spray from the nozzle hole 27 tends to travel a longer distance in the twist angle ⁇ TW direction described later.
  • the nozzle hole angle ⁇ INC needs to be set to an appropriate size that does not hinder the formation of the butterfly spray in consideration of the twist angle ⁇ TW and the layout angle ⁇ LA described later.
  • the layout angle ⁇ LA will be described.
  • an inner nozzle hole and an outer nozzle hole are defined.
  • the secondary X axis coincides with the X axis, but the above description is on the upper side of the secondary X axis, that is, on the right side of the Y axis (the right side of the drawing).
  • the nozzle hole closest to the sub-X axis is the inner nozzle hole.
  • the sub-X axis the sub-X axis
  • the closest nozzle hole is defined as the inner nozzle hole.
  • the nozzle hole 27-2 is an inner nozzle hole
  • the nozzle hole 27-3 is an inner nozzle hole.
  • the nozzle hole closest to the Y-axis is the outer nozzle hole
  • the nozzle hole closest to the Y axis is defined as the outer nozzle hole.
  • the nozzle hole 27-1 is an outer nozzle hole
  • the nozzle hole 27-4 is an outer nozzle hole.
  • the injection holes are divided into only the inner injection holes and the outer injection holes, but the total number of injection holes is 10 or more. In this case, nozzle holes other than the inner and outer nozzle holes are disposed between the inner nozzle hole and the outer nozzle hole.
  • the layout angle ⁇ LA is defined by the point where the central axis of the nozzle hole 27 (see FIG. 8) intersects the inner surface of the orifice plate 23 and the center of the virtual nozzle hole arrangement circle where the nozzle hole 27 is provided. Is defined as an angle formed by the line connecting the two and the sub-X axis (see FIG. 9).
  • the layout angle ⁇ LA of the outer nozzle holes (the nozzle holes 27-1 and 27-4) is set to an arbitrary size of 60 degrees or more.
  • the layout angle ⁇ LA of the nozzle hole 27-1 that is the outer nozzle hole in the first quadrant and the layout angle ⁇ LA of the nozzle hole 27-4 that is the outer nozzle hole in the fourth quadrant should be 60 degrees or more as described above. For example, they need not be identical to each other.
  • the layout angle ⁇ LA of the inner nozzle hole is 20 degrees or more, and the angle is set to a size exceeding the value obtained by subtracting the layout angle ⁇ LA of the outer nozzle hole from 90 degrees.
  • the size of the outer nozzle hole can be set separately. Therefore, in the first quadrant, the layout of the nozzle hole 27-2 that is the inner nozzle hole.
  • the angle ⁇ LA is 20 degrees or more and is set to a value larger than the value obtained by subtracting the layout angle ⁇ LA of the nozzle hole 27-1 that is the outer nozzle hole from 90 degrees.
  • the layout angle ⁇ LA of the nozzle hole 27-3 that is the inner nozzle hole is 20 degrees or more, and the layout angle ⁇ LA of the nozzle hole 27-4 that is the outer nozzle hole is subtracted from 90 degrees. It is set to a value larger than the value.
  • the layout angle ⁇ LA of the remaining nozzle holes exceeds the layout angle ⁇ LA of the inner nozzle holes and is less than the layout angle ⁇ LA of the outer nozzle holes.
  • the twist angle ⁇ TW is defined as an angle formed by a line formed by projecting the central axis of the nozzle hole 27 (see FIG. 8) onto the inner surface of the orifice plate 23 and the sub-X axis. (See FIG. 9).
  • the twist angle ⁇ TW is an element that determines the position in the azimuth direction of the spray from the nozzle hole 27. As the twist angle ⁇ TW increases, the width of the spray from the nozzle hole 27 increases in the Y-axis direction. As a result, interference between sprays from adjacent nozzle holes 27 increases.
  • each spray is positioned at an appropriate position so that only the sprays of adjacent nozzle holes interfere with each other.
  • FIG. 10 schematically shows the positional relationship at the tip of each spray.
  • “S1” indicates the spray from the nozzle hole 27-1
  • “S2” indicates the spray.
  • the spray from the hole 27-2, "S3” is the spray from the nozzle hole 27-3, “S4" is the spray from the nozzle hole 27-4, and "S5" is from the nozzle hole 27-5.
  • FIG. 16 is a measurement example of the spray shape of the tip portion of the butterfly spray formed by the nozzle hole 27 formed as described above, and it can be confirmed that the spray shape is roughly a butterfly shape.
  • the formation of the butterfly spray is one of the factors influencing the diameter D of the nozzle hole 27 and the length L of the nozzle hole 27.
  • the ratio of the length L of the nozzle hole 27 to the diameter D of the nozzle hole 27, L / D is set to a medium size in order to balance the spray particle size, penetration force, and reduction of unnecessary fuel adhesion in the intake pipe.
  • the diameter D of the injection hole 27 is a length in a direction orthogonal to the central axis of the injection hole 27, and the length L of the injection hole 27 is the injection hole 27 along the central axis of the injection hole 27. (See FIG. 8).
  • a device for measuring the flow distribution of the spray called a Matrix tester, is installed downstream of the fuel injection valve 20 along the Z-axis direction. This is done by paying attention to the points described later by the flow rate distribution.
  • the Matrix testing machine has a known configuration that enables measurement of a flow rate distribution in a plane perpendicular to the Z-axis or in a cross section at an arbitrary angle.
  • the distance between the Matrix test machine and the fuel injection valve 20 varies depending on the specific size of the fuel injection valve 20, the injection amount, and the like, but is preferably set within a range of about 40 mm to 150 mm.
  • the fuel pressure is preferably in the range of about 200 to 900 kPa, and usually 300 kPa is preferred.
  • the internal pressure in the measurement chamber is preferably in the range of 0 to 2 bar, and usually it is preferably below atmospheric pressure.
  • the temperature in the measurement chamber is preferably in the range of 0 to 50 degC, and usually 20 degC is suitable.
  • the fuel temperature is preferably in the range of 0 to 80 degC, and usually 20 degC is suitable.
  • the measurement surface is defined as follows. First, on the downstream side of the orifice plate 23, that is, on the downstream side of the fuel injection valve 20, the horizontal axis parallel to the X axis described above is referred to as a measurement X ′ axis and is expressed as “X ′”, and the Y axis A vertical axis that is parallel to the Z axis and intersects with the Z axis is referred to as a Y ′ axis for measurement and is expressed as “Y ′”.
  • a measurement plane formed by the above-described measurement X ′ axis and measurement Y ′ axis and perpendicular to the Z axis is defined as a measurement X′Y ′ plane.
  • FIG. 11 shows an example of a flow distribution obtained on the X′Y ′ plane for measurement. That is, in the figure, each grid portion is a point at which spray is measured, and the numerical value in each grid represents the spray amount at that point. Note that the numerical values in FIG. 11 are not based on actual measurements, but are merely simulation examples under the precondition that the spray from the fuel injection valve 20 in the embodiment of the present invention is measured using a Matrix tester. .
  • the spray amount at each point is sequentially integrated from the point where the spray amount is large. That is, for example, in the case of the example of FIG. 11, the spray amount 2.8 at the point indicated by the symbol Sa is the largest, the spray amount 2.6 at the point indicated by the symbol Sb is the second largest, and the symbol Sc The spray amount 2.4 at the indicated point is the third largest, and the spray amount 2.2 at the point indicated by the symbol Sd is the fourth largest, and so on. Therefore, the jet flow rate is sequentially accumulated as 2.8 + 2.6 + 2.4 + 2.2, and the spray flow rate at a position where the accumulated value exceeds 5% of the total spray flow rate is set as the quasi-maximum flow rate. Define.
  • the position exceeding 5% is a position where the integrated value is 10. That is, in the example of FIG. 11, the integrated value at the fourth point of integration, that is, the point indicated by the symbol Sd is 10, and the spray flow rate 2.2 at this point is the quasi-maximum flow rate. Further, a position where the spray amount at each point is 1 ⁇ 2 of the quasi-maximum flow rate, that is, in the case of the example of FIG. In the butterfly spray obtained by the fuel injection valve 20 in the embodiment of the present invention, two regions where the spray amount exceeds the quasi-maximum flow rate 2.2 are formed in the region exceeding the above-described intermediate flow rate position.
  • FIG. 12 is an example in which the integrated value of the spray flow rate at each point on the Y ′ axis is graphed at each point on the X ′ axis with respect to the distribution example of the spray flow rate shown in FIG. 11.
  • the butterfly-like spray obtained by the fuel injection valve 20 in the embodiment of the present invention has a shape feature as described below.
  • this shape has the following characteristics. Yes.
  • the shape indicated by the boundary line with the outside of the butterfly spray shown on the X′Y ′ plane for measurement is generally a butterfly shape.
  • this butterfly shape assumes a virtual line (not shown) connecting the geometric centroids of the respective regions divided by the Y ′ axis for measurement, and is perpendicular to the virtual line.
  • An equal line (vertical line represented by a dotted line in FIG. 13) is set up. Then, two points occur where the vertical bisector (hereinafter, referred to as “virtual vertical bisector between geometric centroids”) and the boundary line between the butterfly spray and the outside intersect. However, the distance between the two points is defined as h1 (see FIG. 13).
  • the fuel injection valve according to the embodiment of the present invention The butterfly spray obtained by 20 satisfies h1 / h2 ⁇ 1/2. Note that the two intersections that define h2 need not be on the same imaginary line that is orthogonal to the imaginary line that connects the geometric centroids.
  • the butterfly spray obtained by the fuel injection valve 20 in the embodiment of the present invention has the following shape characteristics.
  • an imaginary line connecting the previous two geometric centroids in the measurement X′Y ′ plane is extrapolated in the measurement X′Y ′ plane, and the boundary between the extrapolated line and the outside of the butterfly spray
  • the vertical dotted line is the virtual vertical bisector between the geometric centroids previously shown in FIG.
  • the Y ′ axis shows only the direction and is drawn with a shifted position.
  • b1 is an intersection located on the left side of the virtual perpendicular bisector between geometric centroids among the intersection of the boundary line with the outside of the butterfly spray and the extrapolation line, This is the X′-axis direction component of the distance from the virtual vertical bisector between the centroids.
  • B1r is the intersection between the geometrical centroid and the intersection located on the right side of the virtual perpendicular bisector between the geometric centroids of the intersection of the boundary line with the outside of the butterfly spray and the extrapolation line described above. This is the X′-axis direction component of the distance from the virtual vertical bisector.
  • FIG. 15 is a schematic diagram schematically showing a graph of the integration results.
  • the center dotted line perpendicular to the X ′ axis is a line corresponding to the position on the X ′ axis of the midpoint of the virtual line connecting the previous geometric center of gravity.
  • a position on the X ′ axis exceeding 0.1 is obtained as a distance from a position on the X ′ axis at the center of the imaginary line connecting the previous geometric gravity center.
  • the distance from the position of the X ′ axis at the midpoint of the virtual line connecting the geometric centroids when the cumulative sum exceeds 0.1 is the virtual vertical bisection between the geometric centroids. Illustrated as b2 on the left side of the line and b2r on the right side of the virtual vertical bisector between geometric centroids.
  • the positions of b1 and b1r described above are inside the positions of b2 and b2, in other words, the geometric center of gravity virtual. It is closer to the vertical bisector.
  • the spray from each nozzle hole 27 moderately interferes with the spray of the adjacent nozzle hole 27 as described above, so that the sprays attract each other. Hydrodynamic forces are generated, the area of each spray is enlarged, and coalescence due to collisions between the liquids being sprayed is reduced and the average particle size of the liquids being sprayed is reduced. Therefore, it is thought that further atomization will be made.
  • the spray from each nozzle hole 27 interferes with the spray of the adjacent nozzle hole 27, and the penetrating force is generated at the tip of the spray. Since a vortex that decreases is generated, the penetrating force has a moderate magnitude, and it is considered that unnecessary fuel adheres to the inner wall surface in the intake pipe 6 (see FIG. 1).
  • the case where the number of the nozzle holes 27 is eight has been described as an example. However, the present invention is not limited to this. Can be obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne une pulvérisation en forme de papillon composée de particules fines et présentant une force de pénétration appropriée grâce à une configuration relativement simple. Des trous d'injection (27-1 à 27-8) sont respectivement disposés selon des angles d'agencement prédéterminés (θLA) dans une plaque à orifices (23) sur un cercle concentrique et les axes centraux respectifs des trous d'injection (27-1 à 27-8) sont inclinés selon un angle de trou d'injection prédéterminé (θINC) par rapport à la direction d'axe Z qui traverse le centre de la plaque à orifices (23) et qui coïncide avec l'axe d'une soupape d'injection de combustible (20). En outre, des angles de torsion (θTW) formés par l'axe X et des lignes formées par la saillie des axes centraux des trous d'injection (27-1 à 27-8) sur la plaque à orifices (23) sont définis de manière à être inférieurs aux angles d'agencement respectifs (θLA) des trous d'injection (27-1 à 27-8). La présente configuration permet la formation d'une pulvérisation en forme de papillon composée de particules fines et présentant une force de pénétration appropriée.
PCT/JP2012/053083 2011-02-10 2012-02-10 Soupape d'injection de combustible WO2012108524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011027317A JP2012167564A (ja) 2011-02-10 2011-02-10 燃料噴射弁
JP2011-027317 2011-02-10

Publications (1)

Publication Number Publication Date
WO2012108524A1 true WO2012108524A1 (fr) 2012-08-16

Family

ID=46638736

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/053083 WO2012108524A1 (fr) 2011-02-10 2012-02-10 Soupape d'injection de combustible

Country Status (2)

Country Link
JP (1) JP2012167564A (fr)
WO (1) WO2012108524A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067550A4 (fr) * 2013-11-07 2017-04-19 Hitachi Automotive Systems, Ltd. Soupape d'injection de carburant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5818939B1 (ja) * 2014-04-23 2015-11-18 三菱電機株式会社 燃料噴射弁及びその燃料噴射弁を備えた噴霧生成装置、並びに火花点火式内燃機関
MY191785A (en) * 2014-10-23 2022-07-15 Mitsubishi Electric Corp Valve device for fuel injection valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007077809A (ja) * 2005-09-12 2007-03-29 Hitachi Ltd ポート噴射式エンジンの燃料噴射弁およびポート噴射式エンジン

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007077809A (ja) * 2005-09-12 2007-03-29 Hitachi Ltd ポート噴射式エンジンの燃料噴射弁およびポート噴射式エンジン

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067550A4 (fr) * 2013-11-07 2017-04-19 Hitachi Automotive Systems, Ltd. Soupape d'injection de carburant

Also Published As

Publication number Publication date
JP2012167564A (ja) 2012-09-06

Similar Documents

Publication Publication Date Title
CA2115819C (fr) Injecteur de fluide
CN101725447B (zh) 燃料喷射阀及搭载该燃料喷射阀的内燃机的燃料喷射装置
US9127635B2 (en) Method of generating spray by fluid injection valve, fluid injection valve, and spray generation apparatus
CN104520577B (zh) 燃料喷射阀
WO2012001802A1 (fr) Valve d'injection de carburant et moteur à combustion interne
US6513724B1 (en) Method and apparatus for defining a spray pattern from a fuel injector
WO2012108524A1 (fr) Soupape d'injection de combustible
JPS6350667A (ja) 電磁式燃料噴射弁のノズル構造
CN102170972A (zh) 旋转喷射器和使用该旋转喷射器喷射涂层产品的方法
WO2014119472A1 (fr) Injecteur de carburant
JP2011190801A (ja) 燃料噴射弁
US20180372047A1 (en) Spray orifice disk and valve
JP6808356B2 (ja) 燃料噴射弁
JP2015161271A (ja) 燃料噴射弁
US20060202062A1 (en) Orifice disc for fuel injector
US6820826B2 (en) Spray targeting to an arcuate sector with non-angled orifices in fuel injection metering disc and method
US10995655B2 (en) Fuel injection device
JP6348740B2 (ja) 燃料噴射装置用ノズルプレート
JP2012122441A (ja) 燃料噴射弁
JP5774108B2 (ja) 燃料噴射弁
JP6817583B2 (ja) 噴霧装置
CN109277217B (zh) 一种带花瓣形喷孔的喷嘴
JP6270346B2 (ja) インジェクタ
US20160169179A1 (en) Nozzle plate for fuel injection device
WO2020085039A1 (fr) Soupape d'injection de carburant

Legal Events

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

Ref document number: 12744732

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: 12744732

Country of ref document: EP

Kind code of ref document: A1