fuel injection valve

Abstract

To provide a fuel injection valve that can increase variation of identification by color.SOLUTION: A fuel injection valve includes a collar clip 50 including identification information of the fuel injection valve, formed into a C annular shape and fitted to an outer periphery of the fuel injection valve. The collar clip 50 has a double structure in which a first collar clip 51 having a C annular shape and a second collar clip 52 having a C annular shape and assembled to the first collar clip 51 are stacked in a radial direction.SELECTED DRAWING: Figure 2A

Description

[Technical Field]

[0001] This invention relates to a method for identifying fuel injection valves. [Background technology]

[0002] A fuel injection valve described in Japanese Patent Laid-Open No. 2005-113771 (Patent Document 1) is known. The fuel injection valve of Patent Document 1 includes a resin material covering the outer periphery of a fixed core, and a sealing member provided to sandwich the outer wall of the resin material. This sealing member is a plate-like resin member formed in a U-shape (see Abstract above). Identification information indicating the characteristics of the fuel injection valve, such as the injection amount and the amount of fuel leakage when the valve is closed, is displayed on the outer periphery of the sealing member, and this identification information is classified by color or symbol (see paragraph 0015). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-113771 [Overview of the Initiative] [Problem to be solved by the invention]

[0004] In the sealing member of Patent Document 1, when the identification information is displayed by color, there are few color variations, making it difficult to increase the variety of identification. Members used for identification by color are not limited to sealing members intended for sealing purposes, but also include those attached to the outer periphery of a fuel injection valve for the primary purpose of identification. Hereinafter, members attached to the outer periphery of a fuel injection valve for identification by color will be referred to as color clips.

[0005] The object of the present invention is to provide a fuel injection valve that can increase the variety of color-based identification. [Means for solving the problem]

[0006] In order to achieve the above object, the fuel injection valve of the present invention comprises: A fuel injection valve (1) including a color clip that includes identification information of the fuel injection valve and is attached to the outer periphery of the fuel injection valve in a C-shaped configuration, The aforementioned color clip has a double structure in which a C-shaped first color clip and a C-shaped second color clip attached to the first color clip are superimposed radially. death, the second collar clip is overlapped radially outwardly with respect to the first collar clip, and has a width dimension in a direction along a central axis of the fuel injection valve smaller than a width dimension of the first collar clip, The first color clip and the second color clip use different colors. . [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a fuel injection valve that can increase the variety of identification by color. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing a cross section along a valve axis (central axis) of an embodiment of a fuel injection valve 1 according to the present invention. [Figure 2A] 1 is an external view of a collar clip according to one embodiment (embodiment 1) of the present invention. [Figure 2B] 1 is an external view of a first collar clip according to an embodiment (embodiment 1) of the present invention. [Figure 2C] 1 is an external view of a second collar clip according to an embodiment (first embodiment) of the present invention. [Figure 3A] FIG. 10 is an external view of a collar clip according to an embodiment (embodiment 2) of the present invention. [Figure 3B] FIG. 10 is an external view of a first collar clip according to an embodiment (embodiment 2) of the present invention. [Figure 3C] FIG. 10 is an external view of a second collar clip according to an embodiment (embodiment 2) of the present invention. [Figure 4A] FIG. 10 is an external view of a collar clip according to an embodiment (Embodiment 3) of the present invention. [Figure 4B] FIG. 10 is an external view of a first collar clip according to an embodiment (Embodiment 3) of the present invention. [Figure 4C] FIG. 10 is an external view of a second collar clip according to an embodiment (Embodiment 3) of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described with reference to the drawings.

[0010] [Example 1] The overall configuration of a fuel injection valve 1 will be described with reference to Fig. 1. Fig. 1 is a cross-sectional view showing a cross section along the valve axis (central axis) of one embodiment of a fuel injection valve according to the present invention. The central axis 1a coincides with the central axis (valve axis) of a moving element 27 integrally provided with a valve element 17 (described later), and coincides with the central axis of a cylindrical body 5 (described later). The central axis 1a also coincides with the central axis of a valve seat 15b (described later).

[0011] The fuel injection valve 1 has a metallic cylindrical body (casing) 5, inside which a fuel flow path 3 is formed in a direction substantially along a central axis 1a. The cylindrical body 5 is made of a magnetic metal material such as stainless steel, and is formed into a stepped shape in a direction along the central axis 1a by a press process such as deep drawing. As a result, the diameter of one end 5a of the cylindrical body 5 is larger than the diameter of the other end 5b. In FIG. 1, the large diameter portion 5a formed at one end is drawn above the small diameter portion 5b formed at the other end.

[0012] In Fig. 1, the upper end (upper end side) will be referred to as the base end (base end side), and the lower end (lower end side) will be referred to as the tip end (tip end side). The names of the base end (base end side) and the tip end (tip end side) are based on the direction of fuel flow. Furthermore, the vertical relationship described in this specification is based on Fig. 1 and does not necessarily coincide with the vertical direction when the fuel injection valve 1 is installed in an internal combustion engine.

[0013] A fuel supply port 2 is provided at the base end of the cylindrical body 5, and a fuel filter 13 is attached to this fuel supply port 2 to remove foreign matter mixed in with the fuel.

[0014] A flange portion (enlarged diameter portion) 5d is formed at the base end of the cylindrical body 5, which is bent to expand radially outward, and an O-ring 11 is disposed in an annular recess (annular groove portion) 4 formed by the flange portion 5d and the base end portion 47a of the resin cover 47.

[0015] The distal end of the cylindrical body 5 defines a valve portion 7, which is composed of a valve element 17 and a valve seat member 15. The valve seat member 15 defines a through-hole 15a extending in a direction along the central axis 1a. A conical surface that decreases in diameter toward the downstream side is formed midway through the through-hole 15a, and the through-hole 15a is formed in a stepped shape by this conical surface. A valve seat 15b is defined on the conical surface, and the valve element 17 moves toward and away from the valve seat 15b to open and close the fuel passage. Note that the entire conical surface on which the valve seat 15b is formed is sometimes referred to as the valve seat 15b. A guide surface 15c that guides the valve element 17 in a direction along the central axis 1a is formed on the inner peripheral surface of the through-hole 15a. The distal end (lower end) of the through-hole 15a opens into the distal end surface of the valve seat member 15, and this opening defines the fuel passage.

[0016] The valve seat member 15 is inserted inside the tip end side of the cylindrical body 5 and fixed to the cylindrical body 5 by laser welding or the like, and a nozzle plate (injection hole plate) 21n is attached to the tip end surface of the valve seat member 15. The nozzle plate 21n is fixed to the valve seat member 15 by laser welding or the like. The nozzle plate 21n is made of a plate-like member (flat plate) with a uniform thickness, and has a plurality of fuel injection holes 110 formed therein.

[0017] The nozzle plate 21n forms a nozzle section (fuel injection section) 21 that determines the form of fuel spray. In this embodiment, the nozzle plate 21n is provided with a curved bulge 21a, and the bulge 21a is provided with the fuel injection holes 110. However, a swirl chamber that imparts a swirling force to the fuel may be provided upstream of the fuel injection holes 110 without providing the bulge 21a.

[0018] In this embodiment, a ball valve is used as the valve body 17, but it is also possible to construct the valve body 17 using something other than a ball valve. For example, a needle valve may be used.

[0019] A drive unit 9 for driving the valve body 17 is located in the middle of the cylindrical body 5. The drive unit 9 is composed of an electromagnetic actuator (electromagnetic drive unit). Specifically, the drive unit 9 is composed of a fixed core 25 fixed inside (inner circumference side) of the cylindrical body 5, a movable element (movable member) 27 located inside the cylindrical body 5 on the tip side relative to the fixed core 25 and movable in a direction along the central axis 1a, an electromagnetic coil 29 externally fitted to the outer circumference side of the cylindrical body 5 at a position where the fixed core 25 and the movable core 27a composed of the movable element 27 face each other with a small gap δ between them, and a yoke 33 covering the electromagnetic coil 29 on the outer circumference side of the electromagnetic coil 29.

[0020] The movable core 27a, the fixed core 25, and the yoke 33 constitute a magnetic path through which the magnetic flux generated by energizing the electromagnetic coil 29 flows. The magnetic flux passes through a minute gap δ, but in order to reduce the leakage magnetic flux flowing through the cylindrical body 5 in the portion of the minute gap δ, a magnetic aperture 5c is provided at a position in the cylindrical body 5 corresponding to the minute gap δ. This magnetic aperture 5c can be formed by demagnetizing the cylindrical body 5, or by an annular recess formed on the outer surface of the cylindrical body 5.

[0021] The electromagnetic coil 29 is wound around a bobbin 31 formed in a cylindrical shape from a resin material and is fitted onto the outer circumference of the cylindrical body 5. The electromagnetic coil 29 is electrically connected to a terminal 43 provided on the connector 41. A drive circuit (not shown) is connected to the connector 41, and a drive current is supplied to the electromagnetic coil 29 via the terminal 43.

[0022] The fixed core 25 is made of a magnetic metal material. The fixed core 25 is formed in a cylindrical shape and has a through hole 25a that penetrates through its center in a direction along the central axis 1a. The fixed core 25 is press-fitted and fixed to the base end side of the small diameter portion 5b of the cylindrical body 5 and is located in the middle part of the cylindrical body 5. The fixed core 25 may be fixed to the cylindrical body 5 by welding, or it may be fixed to the cylindrical body 5 by a combination of welding and press-fitting.

[0023] The movable core 27 has a large diameter portion 27a formed on the base end side, and this large diameter portion 27a constitutes the movable core 27a that faces the fixed core 25. A small diameter portion (rod portion) 27b is formed on the tip side of the movable core 27a, and the valve body 17 is fixed to the tip of this small diameter portion 27b by welding. This small diameter portion 27b constitutes a connecting portion that connects the movable core 27a and the valve body 17. In this embodiment, the movable core 27a and the connecting portion 27b are formed from a single member made of the same material, but they may also be formed by joining two members together.

[0024] In this embodiment, the valve body 17 is described as a separate component from the movable element 27, but the valve body 17 may be included as a part of the movable element 27. Furthermore, the movable element 27 is guided to move in the direction along the central axis 1a (the valve opening / closing direction) by the outer circumferential surface of the movable core 27a contacting the inner circumferential surface of the cylindrical body 5.

[0025] A through-hole is formed in the movable core 27a along the central axis 1a, and this through-hole forms a fuel passage 3 inside the movable element 27. The fuel that flows through the fuel passage 3 inside the movable element 27 flows out to the outside of the movable element 27 through the opening 27d on the side of the small diameter portion 27b.

[0026] An adjuster 35 is disposed inside the through-hole 25a of the fixed core 25, and a coil spring 39 is disposed between the adjuster 35 and the movable core 27a. The base end of the coil spring 39 abuts against the tip end face of the adjuster 35, and the tip end of the coil spring 39 abuts against the movable core 27a. The coil spring 39 functions as a biasing member that biases the movable core 27 in a direction in which the valve element 17 abuts against the valve seat 15b (valve closing direction).

[0027] The yoke 33 is made of a magnetic metal material and also serves as the housing of the fuel injection valve 1. The yoke 33 is formed in a stepped cylindrical shape having a large-diameter portion 33a and a small-diameter portion 33b. The large-diameter portion 33a is cylindrical and covers the outer periphery of the electromagnetic coil 29, and a small-diameter portion 33b having a smaller diameter than the large-diameter portion 33a is formed at the tip end of the large-diameter portion 33a. The small-diameter portion 33b is press-fitted onto the outer periphery of the small-diameter portion 5b of the cylindrical body 5. As a result, the inner circumferential surface of the small-diameter portion 33b is in close contact with the outer circumferential surface of the cylindrical body 5. At this time, at least a portion of the inner circumferential surface of the small-diameter portion 33b faces the outer circumferential surface of the movable iron core 27a via the cylindrical body 5, reducing the magnetic resistance of the magnetic path in this facing portion.

[0028] An annular recess 33c is formed along the circumferential direction on the outer peripheral surface of the tip end of the yoke 33. At a thin-walled portion formed on the bottom surface of the annular recess 33c, the yoke 33 and the cylindrical body 5 are joined by laser welding 24 around the entire circumference.

[0029] A cylindrical protector 49 having a flange portion 49a is fitted onto the tip of the cylindrical body 5, and the tip of the cylindrical body 5 is protected by the protector 49. The protector 49 covers the laser welded portion 24 of the yoke 33.

[0030] An annular groove 34 is formed by the flange portion 49a of the protector 49, the small diameter portion 33b of the yoke 33, and a stepped surface between the large diameter portion 33a and the small diameter portion 33b of the yoke 33, and an O-ring 46 is fitted into the annular groove 34. The O-ring 46 functions as a seal to ensure liquid-tightness and air-tightness between the inner peripheral surface of an insertion port formed on the internal combustion engine side and the outer peripheral surface of the small diameter portion 33b of the yoke 33 when the fuel injection valve 1 is attached to the internal combustion engine.

[0031] A resin cover 47 is molded over the range from the middle portion of the fuel injection valve 1 to the vicinity of the base end portion. The tip end portion of the resin cover 47 covers a part of the base end portion of the large diameter portion 33a of the yoke 33. The resin cover 47 also covers the wiring member 45, and the connector (power receiving coupler) 41 is integrally formed with the resin cover 47.

[0032] A groove 47b is formed in the outer periphery of the resin cover 47 except for the connection portion between the connector (power receiving coupler) 41 and the resin cover 47, and a color clip 10 is fitted into this groove 47b. The color clip 10 will be described in detail later.

[0033] Next, the operation of the fuel injection valve 1 will be described.

[0034] When the electromagnetic coil 29 is de-energized and no drive current flows through it, the movable element 27 is biased in the valve-closing direction by the coil spring 39, and the valve body 17 is in contact with (seaten) the valve seat 15b (valve-closed state). In this case, a gap δ exists between the tip end face of the fixed core 25 and the base end face of the movable core 27a. In this embodiment, this gap δ is equal to the stroke of the movable element 27 (i.e., the valve body 17).

[0035] When the electromagnetic coil 29 is switched to an energized state and a drive current flows through it, a magnetic flux is generated in the magnetic path formed by the movable core 27a, the fixed core 25, and the yoke 33. This magnetic flux generates a magnetic attractive force between the fixed core 25 and the movable core 27a, which are facing each other across a gap δ. When this magnetic attractive force overcomes the resultant force of the biasing force from the coil spring 39 and the fuel pressure acting on the movable element 27 in the valve closing direction, the movable element 27 begins to move in the valve opening direction. When the movable element 27 moves a distance equal to the gap δ in the valve opening direction and comes into contact with the fixed core 25, the movable core 27a is stopped from moving in the valve opening direction and reaches an open and stationary state (valve open stationary state).

[0036] When the movable element 27 moves in the valve opening direction and the valve body 17 moves away from the valve seat 15b, a gap (fuel passage) is formed between the valve body 17 and the valve seat 15b, and the fuel supplied to the fuel injection hole 110 through this gap is injected from the fuel injection hole 110 to the outside of the fuel injection valve 1.

[0037] When the current to the electromagnetic coil 29 is cut off, the magnetic attractive force decreases and eventually disappears. At this stage, when the magnetic attractive force becomes smaller than the biasing force of the coil spring 39, the movable element 27 begins to move in the valve closing direction. When the valve body 17 comes into contact with the valve seat 15b, the valve body 17 closes the valve section 7 and comes to a stationary state (closed state).

[0038] In order to reduce the squeeze force acting between movable core 27a and fixed core 25, a protrusion may be provided on the end face of movable core 27a facing fixed core 25. In such a case, the movement distance (stroke) of valve element 17 is the gap δ minus the protrusion height. Also, a stopper may be provided to limit the movement of movable core 27 in the valve opening direction before movable core 27a and fixed core 25 come into contact.

[0039] Next, a collar clip 50 according to this embodiment will be described with reference to Figures 2A to 2C. Figure 2A is an external view of the collar clip 50 according to one embodiment (embodiment 1) of the present invention. Figure 2B is an external view of a first collar clip 51 according to one embodiment (embodiment 1) of the present invention. Figure 2C is an external view of a second collar clip 52 according to one embodiment (embodiment 1) of the present invention. Figure 2A(C) is a view corresponding to the CC cross section of Figure 2A.

[0040] The color clip 50 corresponds to 10 in Fig. 1, and by recognizing the identification information on the color clip 10 with a camera from the direction shown in Fig. 1 (a direction perpendicular to the central axis 1a), the fuel injection valve (injector) 1 is automatically identified according to its specifications. The color clip 10 is used to identify the use on the production line or at the shipping destination. In this embodiment, color is used as the identification information.

[0041] The color clip 50 of this embodiment will now be described. The color clip 50 consists of a first color clip 51 and a second color clip 52, and has a notch 50b in part of the ring, forming a C-ring. The color clip 50 has a double structure in which the C-ring first color clip 51 and the C-ring second color clip 52, which is assembled to the first color clip 51, are superimposed radially. The second color clip 52 is superimposed radially outward relative to the first color clip 51. In other words, the first color clip 51 is superimposed radially inward relative to the second color clip 52.

[0042] The first color clip 51 is in direct contact with the fuel injector 1 and constitutes the inner (inner circumference) member of the color clip 50 formed by combining the first color clip 51 and the second color clip 52. The first color clip 51 has a notch 51b in part of its ring, forming a C-ring.

[0043] The second color clip 52 is in direct contact with the first color clip 51, and in the color clip 50 formed by combining the first color clip 51 and the second color clip 52, it constitutes the outer (outer circumference) member. The second color clip 52 has a notch 52b in part of its ring, forming a C-shaped ring with a larger diameter than the first color clip 51.

[0044] The notch 51b of the first color clip 51 and the notch 52b of the second color clip 52 are combined to form the notch 50b of the color clip 50.

[0045] The color clip 50 is a double-layered color clip formed by combining a first color clip 51 and a second color clip 52. The combination of the colors of the first color clip 51 and the second color clip 52 serves as identification information for the fuel injector 1. To ensure that the combination of the colors of the first color clip 51 and the second color clip 52 is recognized, the width (length in the direction of the central axis 1a, width dimension) W51 of the first color clip 51 is larger than the width (length in the direction of the central axis 1a, width dimension) W52 of the second color clip 52. In other words, the width W52 of the second color clip 52 is smaller than the width W51 of the first color clip 51.

[0046] The first color clip 51 and the second color clip 52 may be of different colors, including the same color combination. In the case of the same color combination, the second color clip 52 may be omitted.

[0047] However, it is preferable to use different color combinations for the first color clip 51 and the second color clip 52. By confirming that the first color clip 51 and the second color clip 52 of different colors are attached to one fuel injector 1, it is possible to confirm that the color clip 50 is correctly attached to the fuel injector 1.

[0048] If the same color combination is used and the second color clip 52 is omitted, it becomes impossible to distinguish cases where the second color clip 52 has accidentally fallen off. Also, even if the same color combination is used and the second color clip 52 is correctly attached, it may be difficult to confirm the attachment of the second color clip 52 with the camera, and there is a risk that it will become impossible to distinguish cases where the second color clip 52 has accidentally fallen off. For this reason, it is preferable to use different color combinations for the first color clip 51 and the second color clip 52 so that the colors of both color clips 51 and 52 can be recognized.

[0049] Next, the assembly of the first collar clip 51 and the second collar clip 52 will be described.

[0050] The collar clip 50 is assembled so that the center O52 of the second collar clip 52 and the center O51 of the first collar clip 51 coincide with the center O50 of the collar clip 50. In other words, the collar clip 50 is assembled so that the central axis 52a of the second collar clip 52 and the central axis 51a of the first collar clip 51 coincide with the central axis 50a of the collar clip 50.

[0051] When the first collar clip 51 and the second collar clip 52 are combined, the outer diameter φ52out of the second collar clip 52 is larger than the outer diameter φ51out of the first collar clip 51, and the inner diameter φ52in of the second collar clip 52 is larger than the inner diameter φ51in of the first collar clip 51. In other words, the second collar clip 52 is disposed so that its outer peripheral surface protrudes radially outward relative to the outer peripheral surface of the first collar clip 51. Furthermore, the outer peripheral surface of the first collar clip 51 and the inner peripheral surface of the second collar clip 52 are in close contact with each other, and the outer diameter φ51out of the first collar clip 51 and the inner diameter φ52in of the second collar clip 52 are the same size.

[0052] When the color clip 50 is attached to the fuel injection valve 1, the center O50 of the color clip 50, the center O51 of the first color clip 51, and the center O52 of the second color clip 52 coincide, thereby improving the degree of adhesion between the first color clip 51 and the second color clip 52, and thereby improving the degree of adhesion between the first color clip 51 and the fuel injection valve 1.

[0053] 2A(B), the second color clip 52 may be attached with a shift to the left or right relative to the first color clip 51. In this case, the end of the first color clip 51 and the end of the second color clip 52 in the direction of the central axis 1a may coincide, making it impossible to distinguish the colors of the first color clip 51 and the second color clip 52, or it may take a long time to distinguish the colors of the first color clip 51 and the second color clip 52. By making the color of the first color clip 51 visible on both sides of the second color clip 52 in the direction of the central axis 1a, the colors of the first color clip 51 and the second color clip 52 can be distinguished. Furthermore, distinguishing the colors of the first color clip 51 and the second color clip 52 increases the variety of identification options.

[0054] In order to be able to distinguish between the colors of the first color clip 51 and the second color clip 52, it is preferable to make the width W52 of the second color clip 52 approximately one-third (1 / 3) of the width W51 of the first color clip 51, taking into account the positional misalignment between the first color clip 51 and the second color clip 52 in the direction of the central axis 1a.

[0055] However, in this embodiment, the width W52 of the second color clip 52 is not limited to approximately one-third the width W51 of the first color clip 51, and the second color clip 52 may be one-third or more, or one-third or less, of the width of the first color clip 51. By making the width W51 of the first color clip 51 at least larger than the width W52 of the second color clip 52, in other words, by making the width W52 of the second color clip 52 smaller than the width W51 of the first color clip 51, the colors of both the first color clip 51 and the second color clip 52 can be reliably recognized.

[0056] The thickness T52 of the second color clip 52 is preferably thinner than the thickness T51 of the first color clip 51. This is because the first color clip 51 is a base member of the color clip 50 and is desirably strong to a certain extent, while the second color clip 52 is a member for increasing the variety of color identification and is desirably manufactured to be lightweight and use a small amount of material. However, this is not essential, and T52 and T51 may be the same size, or T52 may be larger than T51. Even in these cases, it is still possible to increase the variety of colors.

[0057] [Example 2] Next, a collar clip 50 according to a second embodiment of the present invention will be described with reference to Figures 3A to 3C. Figure 3A is an external view of the collar clip 50 according to one embodiment (embodiment 2) of the present invention. Figure 3B is an external view of a first collar clip 51 according to one embodiment (embodiment 2) of the present invention. Figure 3C is an external view of a second collar clip 52 according to one embodiment (embodiment 2) of the present invention. Note that Figure 3C is a view corresponding to the CC cross section of Figure 3A.

[0058] In this embodiment, compared to embodiment 1, the configuration of the collar clip 50 is partially different. Below, the same components as in embodiment 1 are assigned the same reference numerals as in embodiment 1, and redundant explanations will be omitted, and only the different parts will be described in detail.

[0059] The first collar clip 51 of this embodiment has a recessed portion 51c on its outer peripheral surface (side surface) that is recessed radially inward from the outer peripheral surface. The recessed portion 51c is provided over the entire area between one end and the other end of the first collar clip 51, which forms a C-shaped ring shape with the cutout portion 51b. That is, in this embodiment, the first collar clip 51 is configured as a recessed type collar clip.

[0060] In this embodiment, the outer diameter φ52out of the second collar clip 52 is equal to or greater than the outer diameter φ51out of the first collar clip 51, and the thickness T52 of the second collar clip 52 is greater than the depth D51c of the recessed portion 51c of the first collar clip 51. The inner peripheral surface of the second collar clip 52 is in close contact with the bottom surface of the recessed portion 51c of the first collar clip 51, and the inner diameter φ52in of the second collar clip 52 is the same as the outer diameter (diameter of the bottom) φ51c of the recessed portion 51c. As a result, the outer peripheral surface of the second collar clip 52 protrudes radially outward beyond the outer peripheral surface of the first collar clip 51.

[0061] The outer diameter φ52out of the second collar clip 52 may be equal to or larger than the outer diameter φ51out of the first collar clip 51, or may be smaller than the outer diameter φ51out of the first collar clip 51.

[0062] The width (width dimension) W51c of the recess 51c of the first color clip 51 is 1 / 3 of the width W51 of the first color clip 51. The width W52 of the second color clip 52 is 1 / 3 of the width of the first color clip 51.

[0063] The width W51c of the recessed portion 51c provided in the first collar clip 51 may be greater than or less than 1 / 3 of the width W51 of the first collar clip 51. The width W52 of the second collar clip 52 may be greater than or less than 1 / 3 of the width W51 of the first collar clip 51. However, the width W52 of the second collar clip 52 must be at least equal to or less than the width W51c of the recessed portion 51c of the first collar clip 51.

[0064] By setting the width W52 of the second collar clip 52 to be equal to or smaller than the width W51c of the recessed portion 51c of the first collar clip 51, the second collar clip 52 fits into the recessed portion 1c of the first collar clip 51. This determines the position of the second collar clip 52 in the width direction (direction along the central axis 1a) relative to the first collar clip 51. This is advantageous in increasing the variety of identification described in the first embodiment.

[0065] The position of the recess 51c provided on the first color clip 51 may be offset from the center (center line) in the width direction of the first color clip 51. In this case, the mounting position of the second color clip 52 relative to the first color clip 51 will be offset from the center (center line) in the width direction of the first color clip 51.

[0066] In this embodiment, the second collar clip 52 is designed to fit into the recessed portion 51c of the first collar clip 51, and is therefore less likely to shift or come off from the first collar clip 51. Furthermore, the recessed portion 51c serves as a guide for the contact portion of the second collar clip 52 with the first collar clip 51 when assembling the second collar clip 52 to the first collar clip 51, making it easier to install the second collar clip 52.

[0067] The color clip 50 of this embodiment has the same configuration as the color clip 50 of Embodiment 1, except for the configuration described above, and can achieve the same effects and advantages.

[0068] [Example 3] Next, a collar clip 50 according to a third embodiment of the present invention will be described with reference to Figures 4A to 4C. Figure 4A is an external view of the collar clip 50 according to one embodiment (embodiment 3) of the present invention. Figure 4B is an external view of a first collar clip 51 according to one embodiment (embodiment 3) of the present invention. Figure 4C is an external view of a second collar clip 52 according to one embodiment (embodiment 3) of the present invention. Note that Figure 4C is a view corresponding to the CC cross section of Figure 4A.

[0069] In this embodiment, some parts of the configuration of the color clip 50 differ from those in Examples 1 and 2. Hereinafter, components similar to those in Examples 1 and 2 are denoted by the same reference numerals, and redundant explanations are omitted. The differences will be described in detail.

[0070] In this embodiment, the outer diameter φ51out of the first collar clip 51 and the outer diameter φ52out of the second collar clip 52 are the same, and the outer surfaces of the first collar clip 51 and the second collar clip 52 constitute the outer surface of a single collar clip 50.

[0071] As shown in FIG. 4A, the second collar clip 52 does not protrude radially outward relative to the first collar clip 51, thereby reducing the possibility that the second collar clip 52 protruding radially outward will get caught and come off the first collar clip 51.

[0072] Furthermore, when the first color clip 51 and the second color clip 52 are combined, if the outer peripheral surface of the first color clip 51 and the outer peripheral surface of the second color clip 52 are misaligned in the radial direction, the focus may not match when photographed with a camera, which may result in a recognition error. However, in this embodiment, the outer peripheral surfaces of the first color clip 51 and the second color clip 52 form the same surface (surface with the same radius), so the focus matches during automatic image recognition, reducing the possibility of a recognition error.

[0073] Furthermore, if the first collar clip 51 and the second collar clip 52 form uneven surfaces, shadows may be cast depending on how the light hits them, which may result in recognition errors. In this embodiment, by making the outer diameter of the first collar clip 51 and the outer diameter of the second collar clip 52 approximately the same, it is possible to eliminate unevenness between the first collar clip 51 and the second collar clip 52, thereby eliminating shadows caused by steps and reducing the possibility of recognition errors.

[0074] The collar clip 50 of this embodiment has the same configuration as the collar clips 50 of the first and second embodiments except for the configuration described above, and can achieve the same effects.

[0075] In the above embodiment, the color clip 50 is configured with two types of color clips 51 and 52, but it may be configured with three or more types of color clips, and the color clip 50 may have a triple or more layer structure.

[0076] As described above, the fuel injection valve 1 of the present invention has the following features. (1) A fuel injection valve including a color clip 50 that includes identification information of the fuel injection valve 1 and is attached to the outer periphery of the fuel injection valve 1 in a C-shaped ring shape, The collar clip 50 has a double structure in which a C-shaped first collar clip 51 and a C-shaped second collar clip 52 assembled to the first collar clip 51 are overlapped in the radial direction.

[0077] (2) The second collar clip 52 is overlapped radially outwardly with respect to the first collar clip 51, and the width dimension W52 in the direction along the central axis 1a of the fuel injection valve 1 is smaller than the width dimension W51 of the first collar clip 51.

[0078] (3) The second collar clip 52 is provided so that its outer circumferential surface protrudes radially outward relative to the outer circumferential surface of the first collar clip 51 .

[0079] (4) The first collar clip 51 has a recessed portion 51c recessed radially inward from the outer circumferential surface, The second collar clip 52 is fitted into the recess 51c.

[0080] (5) The inner diameter φ52in of the second collar clip 52 is the same as the outer diameter φ51c of the recessed portion 51c of the first collar clip 51, The width W52 of the second collar clip 52 is equal to or smaller than the width W51c of the recessed portion 51c of the first collar clip.

[0081] (6) The width W51c of the recess 51c of the first collar clip 51 is one-third of the width W51 of the first collar clip 51.

[0082] (7) The outer diameter φ52out of the second collar clip 52 is the same as the outer diameter φ51out of the first collar clip 51.

[0083] (8) The first color clip 51 and the second color clip 52 are different colors. [Explanation of symbols]

[0084] 1...fuel injection valve, 1a...central axis of fuel injection valve 1, 50...collar clip, 51...first collar clip, 51c...recessed portion, 52...second collar clip, W51...width dimension of first collar clip 51, W51c...width dimension of recessed portion 51c, W52...width dimension of second collar clip, φ51c...outer diameter of recessed portion 51c, φ51out...outer diameter of first collar clip 51, φ52in...inner diameter of second collar clip 52, φ52out...outer diameter of second collar clip 52.

Claims

1. A fuel injection valve including a color clip that includes identification information of the fuel injection valve and is attached to the outer periphery of the fuel injection valve in a C-shaped configuration, The collar clip has a double structure in which a first C-shaped collar clip and a second C-shaped collar clip assembled to the first collar clip are overlapped in the radial direction, the second collar clip is overlapped radially outwardly with respect to the first collar clip, and has a width dimension in a direction along a central axis of the fuel injection valve smaller than a width dimension of the first collar clip, The fuel injection valve is characterized in that the first color clip and the second color clip are different in color.

2. 2. The fuel injection valve according to claim 1, The fuel injection valve is characterized in that the second collar clip is provided so that its outer peripheral surface protrudes radially outward relative to the outer peripheral surface of the first collar clip.

3. 2. The fuel injection valve according to claim 1, The first collar clip has a recessed portion recessed radially inward from an outer circumferential surface thereof, The fuel injection valve is characterized in that the second collar clip is fitted into the recessed portion.

4. 4. The fuel injection valve according to claim 3, The inner diameter of the second collar clip is the same as the outer diameter of the recessed portion of the first collar clip, The fuel injection valve according to claim 1, wherein the width of the second collar clip is equal to or smaller than the width of the recessed portion of the first collar clip.

5. 4. The fuel injection valve according to claim 3, A fuel injection valve according to claim 1, wherein the width of the recessed portion of the first collar clip is one-third of the width of the first collar clip.

6. 4. The fuel injection valve according to claim 3, The fuel injection valve according to claim 1, wherein the outer diameter of the second collar clip is the same as the outer diameter of the first collar clip.

Images