JP6620240B2 - Fuel injection device - Google Patents

Description

  The present invention relates to a fuel injection device suitable for use in an internal combustion engine.

  In a direct-injection internal combustion engine that directly injects fuel into a combustion chamber, the fuel injection device is disposed on the cylinder head so that the tip portion faces the combustion chamber. In order to detect the state in the combustion chamber in response to the recent tightening of fuel economy and exhaust regulations, a fuel injection device is known in which a sensor is attached to the tip of the fuel injection device and the sensor is integrated. As such a fuel injection device, there is an in-cylinder pressure detection device for a direct fuel injection internal combustion engine described in International Publication No. WO2012 / 115036 (Patent Document 1).

  This in-cylinder pressure detecting device is provided with a ring-shaped pressure detecting element (in-cylinder pressure sensor) surrounding the periphery of a fuel injection hole in the vicinity of the tip of an injector that injects fuel into a combustion chamber. In this in-cylinder pressure detecting device, since the pressure detecting element is provided integrally with the injector, it is not necessary to change the shape and structure of the cylinder head and the combustion chamber. In addition, the pressure detection element can be cooled with the fuel passing through the injector to enhance the pressure detection accuracy and durability. Further, since the ring-shaped pressure detection element surrounds the fuel injection hole, the size of the pressure detection element is maximized while avoiding the pressure detection element from interfering with the fuel injected from the fuel injection hole. Pressure accuracy can be ensured (see summary).

In the in-cylinder pressure detecting device of Patent Document 1, a valve seat member having a fuel injection hole is welded to the inner periphery of the tip end portion of the valve housing. A ring-shaped pressure detection element made of a piezoelectric element is fixed to the outer periphery of the distal end portion of the valve housing by welding. At this time, the end of the pressure detection element on the tip end side (combustion chamber side) is welded to the tip end portion of the valve housing (first weld portion).
Further, the end of the pressure detection element on the base end side (delivery pipe side) is the outer periphery of the valve housing, and the end of the collar structure provided on the base end side (delivery pipe side) of the pressure detection element. (Second welded portion). The collar structure is welded at its proximal end to the outer periphery of the valve housing (see third weld, paragraphs 0042-0048 and FIG. 3). In addition, the 1st welding part, the 2nd welding part, and the 3rd welding part which were mentioned above are the names defined in this specification, in order to make explanation easy to understand.

  That is, in the in-cylinder pressure detecting device of Patent Document 1, the pressure detecting element is welded and fixed to the valve housing by the first welded portion, and is welded and fixed to the valve housing by the third welded portion via the second welded portion and the collar structure. Has been.

International Publication Number WO2012 / 115036

  In the in-cylinder pressure detection device of Patent Document 1, when a pressure detection element (hereinafter referred to as a sensor) is integrated with an injector (hereinafter referred to as a fuel injection device), the sensor and the fuel injection device are joined by welding. .

  In the structure of Patent Document 1, there is a possibility that the valve housing (hereinafter referred to as a nozzle) of the fuel injection device may be deformed by heat input caused by welding of a third weld portion provided on the base end side of the sensor. The deformation of the nozzle adversely affects the performance (flow rate performance, oil tightness performance, etc.) of the fuel injection device.

  An object of the present invention is to provide a fuel injection device having a sensor mounting structure that can suppress deformation of a nozzle and suppress a decrease in performance (flow rate performance, oil tightness performance, etc.) of the fuel injection device. .

In order to solve the above problems, a fuel injection device of the present invention includes:
A fuel supply port provided at the base end,
A fuel injection hole provided at a distal end which is an end opposite to the base end;
A hollow cylindrical body extending in the direction of the central axis connecting the base end and the tip, and a nozzle having a valve seat and the fuel injection hole at the end on the tip side;
A valve body provided inside the nozzle so as to be able to contact and separate from the valve seat;
A sensor provided on the outer periphery of the end of the nozzle on the tip side;
A holding member which is provided on the outer peripheral side of the nozzle on the base end side with respect to the sensor, and the sensor is fixed to an end on the tip end side;
The holding member includes a groove portion formed on the inner peripheral provided along the center axis direction, and the plastic deformation portion locked with the outer periphery of the nozzle is formed at an end portion of the side of the proximal end, the Yes, and
A wiring of a sensor signal output from the sensor is disposed in the groove portion,
The plastically deformed portion in a portion excluding the disposition portion of the wiring in the circumferential direction Ru is formed.

  According to the present invention, heat input to the nozzle of the fuel injection device can be suppressed, and deformation of the nozzle can be suppressed and the sensor can be attached to the fuel injection device. For this reason, the adverse effect on the performance of the fuel injection device can be suppressed, and the sensor and the fuel injection device can be integrated. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is sectional drawing which shows the whole structure which concerns on one Example of the fuel-injection apparatus with which this invention is implemented. It is sectional drawing which expands and shows the sensor fixing | fixed part of the fuel-injection apparatus of FIG. It is sectional drawing which expands and shows the sensor fixing | fixed part of a fuel-injection apparatus about the example of a change of a sensor fixing | fixed part.

Examples according to the present invention will be described below.
[Example 1]
FIG. 1 is a cross-sectional view showing an overall configuration according to an embodiment of a fuel injection device in which the present invention is implemented. In the following, all the drawings are exaggerated for the purpose of explanation, and are different from actual dimensions.

  The fuel injection device 100 has a fixed core 107 in which a through hole 112 penetrating in the direction of the central axis 100 a is formed, and a spring 110 </ b> A and a regulator 111 are disposed in the through hole 112 of the fixed core 107.

  A fuel supply port 112a is provided at the upper end of the fixed core 107, and a fuel pipe (delivery pipe) (not shown) is connected to the fuel supply port 112a. A high pressure pump (not shown) for supplying fuel under pressure is connected to the fuel pipe, and fuel pressurized by the high pressure pump is supplied to the fuel injection device 100 through the fuel supply port 112a. A through hole 112 whose one end constitutes a fuel supply port 112 a constitutes a fuel passage in the center of the fixed core 107, and pressurized fuel passes through the through hole 112 and a fuel injection hole 102 a provided at the tip of the fuel injection device 100. To be supplied.

  In the fuel injection device 100, the end on the fuel supply port 112a side to which the fuel pipe is connected is the base end (base end), and the end opposite to the base end, that is, the side where the fuel injection hole 102a is provided. The end of is the tip (tip). When specifying both end portions in the direction along the central axis 100 a in the components constituting the fuel injection device 100, the “base end” and “tip” of the fuel injection device 100 are used to indicate the base end side of the fuel injection device 100. Are designated as “proximal end portions” and the end portions on the distal end side of the fuel injection device 100 are designated as “distal end portions”.

  A nozzle (valve body) 104 having a hollow portion 104a formed in the direction of the central axis 100a is connected to an end portion (end portion on the tip end side) opposite to the fuel supply port 112a side of the fixed core 107. Yes. That is, the nozzle 104 is configured by a hollow cylindrical body extending in the direction of the central axis 100a, and has a valve seat 102b (see FIG. 2) and a fuel injection hole 102a at the end on the tip end side. The nozzle 104 corresponds to the valve housing disclosed in Patent Document 1.

  The nozzle 104 is provided with an enlarged diameter portion 104A on the end side on the proximal end side, and a reduced diameter portion 104B that is reduced in diameter from the enlarged diameter portion (large diameter portion) 104A toward the distal end side. . A cylindrical portion 104C having a constant diameter is provided from the end of the reduced diameter portion 104B toward the tip where the fixed valve 102 is provided. The diameter of the cylindrical portion 104C is smaller than the diameter of the enlarged diameter portion 104A, and constitutes the smaller diameter portion 104C with respect to the enlarged diameter portion (large diameter portion) 104A.

  A fixed valve 102 is fixed to an end portion of the nozzle 104 opposite to the fuel supply port 112a side (end portion on the tip end side). The fixed valve 102 is fixed to the inner periphery of the end portion on the tip end side of the nozzle 104 by welding. A valve seat 102b is formed in the fixed valve 102, and a fuel injection hole 102a is formed on the downstream side of the valve seat 102b in the fuel flow direction. The fixed valve 102 may be called a valve seat member.

  A valve body 101 and a movable core 106 are formed in a space (hollow portion 104a) between the end surface on the distal end side of the fixed core 107 and the end surface on the proximal end side of the fixed valve 102 inside the nozzle 104. The movers 101 and 106 are accommodated. The valve body 101 is provided inside the nozzle 104 so as to be able to contact and separate from the valve seat 102b.

A seating surface of a spring (first spring) 110 </ b> A is provided in the enlarged diameter portion 101 a provided at the end portion on the proximal end side of the valve body 101. The end of the spring 110 </ b> A opposite to the valve body 101 is in contact with the adjuster 111. The adjuster 111 is fixed to the fixed core 107. Thereby, the valve body 101 is urged in the valve closing direction by the spring 110A.
The adjuster 111 adjusts the urging force of the valve body 101 by adjusting the position in the through hole 112 in the direction along the central axis 100a.

  The valve body 101 is held by a guide member 103 and a mover guide 105 so as to reciprocate in the vertical direction. That is, the valve body 101 is guided by the two guide members 103 and 105 in the direction of the on-off valve direction.

  A movable core 106 is provided in the hollow portion 104 a of the nozzle 104. A through hole 106a that penetrates in the direction along the central axis 100a is formed at the center of the movable core 106, the valve body 101 is inserted through the through hole 106a, and the valve body 101 and the movable core 106 are connected to the central axis 100a. Are assembled in a state in which relative movement is possible.

  The end face on the proximal end side of the movable core 106 faces the fixed core 107, and the end face on the proximal end side of the second spring 110B is in contact with the end face on the distal end side of the movable core 106. The end of the second spring 110 </ b> B on the distal end side is in contact with the end surface on the proximal end side of the guide member 103. As a result, the second spring 110B biases the movable core 106 toward the base end side (the valve opening direction).

  The movable core 106 urged in the valve opening direction by the second spring 110B engages with the diameter-expanded portion 101a of the valve body 101, and relative movement with respect to the valve body 101 is restricted. The urging force in the valve closing direction by the first spring 110A is larger than the urging force in the valve opening direction by the second spring 110B. For this reason, in the valve-closed state in which the coil 108 is not energized, the valve body 101 is urged in the valve closing direction by the urging force that is the difference between the urging force of the first spring 110A and the urging force of the second spring 110B. Yes. As a result, the valve body 101 is in contact with the valve seat 102b of the fixed valve 102 provided at the tip of the nozzle 104, thereby blocking the flow of fuel supplied from the high pressure pump.

  In the present embodiment, the valve body 101 and the movable core 106 are configured to be capable of relative movement in the direction along the central axis 100a. However, the valve body 101 and the movable core 106 may be fixed. When the valve body 101 and the movable core 106 are fixed, the second spring 110B is not necessary.

  A coil 108 is wound around the outer periphery of the end portion on the proximal end side of the nozzle 104. The outer periphery of the coil 108 is covered with a resin housing 109. As a result, the coil 108 is disposed on the outer periphery of the fixed core 107, and a toroidal magnetic path indicated by an arrow φ is formed in the housing 109, the nozzle 104, and the movable core 106.

  The resin forming the housing 109 that covers the outer periphery of the coil 108 forms the connector 114 integrally with the housing 109. Inside the connector 114 (plug insertion portion), a tip end portion of a terminal (wiring member) 113a electrically connected to the coil 108 is exposed. A plug (not shown) to which wiring from a controller (not shown) is connected is connected to the tip of the terminal 113a. Thereby, the energization and de-energization of the coil 108 are controlled through the tip of the terminal 113a by a controller (not shown).

  Here, the on-off valve operation of the valve body 101 will be described. When the coil 108 is energized, a magnetic attractive force is generated between the movable core 106 and the fixed core 107 by the magnetic flux passing through the magnetic path φ. The movable core 106 moves toward the base end (in the valve opening direction) by being sucked by the fixed core 107, and moves until it collides with the end face on the distal end side of the fixed core 107.

  As a result, the valve body 101 is separated from the valve seat 102b of the fixed valve 102 and the fuel passage between the valve body 101 and the valve seat 102b is opened (valve open state), and from the through hole 112 of the fixed core 107. The supplied fuel is injected from the fuel injection hole 102a into the combustion chamber.

  When the power supply to the coil 108 is cut off, the magnetic flux in the magnetic path φ disappears and the magnetic attractive force disappears. In this state, the spring force of the spring 110 </ b> A that pushes the valve body 101 in the valve closing direction acts on the valve body 101. As a result, the valve body 101 is pushed back to the valve closing position in contact with the valve seat 102b of the fixed valve 102. As a result, the fuel passage between the valve body 101 and the valve seat 102b is closed (valve closed state).

  Next, the mounting structure of the sensor 120 will be described.

  An annular sensor 120 having a sensor element is disposed at the outer peripheral tip of the nozzle 104, and a sensor signal line 121 from the sensor 120 is disposed along the nozzle 104 and the housing 109. The sensor element of the sensor 120 detects a physical quantity related to the state of the combustion chamber.

  The sensor signal line 121 is arranged on the outer peripheral side of the nozzle 104 and is arranged inside the resin 115. The sensor signal line 121 is embedded in the resin 115 and the end thereof is connected to a terminal (wiring member) 113b exposed to the inside (plug insertion portion) of the connector 114. The sensor output of the sensor 120 is taken out to the outside (for example, a controller) through the sensor signal line 121 and the terminal 113b.

  The resin 115 covers a part of the arrangement range of the sensor signal line 121 from the end side on the base end side of the nozzle 104 to the middle toward the end on the tip end side. The sensor signal line 121 is not covered with the resin 115 on the end side of the nozzle 104 at the tip end side. A protective member 122 is provided on the outer peripheral side of the sensor signal line 121 on the end side of the nozzle 104 that is not covered with the resin 115. The protection member 122 has a cylindrical shape to protect the sensor signal line 121 and covers the sensor signal line 121. The protective member 122 is joined and integrated with the sensor 120. The cylindrical body constituted by the protection member 122 and the sensor 120 is disposed so as to cover the outer peripheral portion from the intermediate portion to the tip end of the nozzle 104 in the direction along the central axis 100a.

  The protection member 122 is provided on the base end side with respect to the sensor 120 and on the outer peripheral side of the nozzle 104, and the sensor 120 is fixed to the end portion on the tip end side. Thus, the protection member 122 is a member that holds the sensor 120, and may be referred to as a holding member.

  The protection member 122 has a structure in which a groove 122d (see an enlarged view of the portion A in FIG. 1) is provided in the axial direction, and a space for wiring the sensor signal line 121 is secured. Further, a seal disposition groove 122b formed in the circumferential direction is provided on the outer peripheral portion of the protective member 122, and a seal member 123 for sealing the combustion gas is disposed in the seal disposition groove 122b.

  Further, the sensor signal line 121 that is not protected by the protective member 122 on the proximal end side of the protective member 122 is covered and protected by the resin 115 as described above, and is not exposed to the outside. It has become.

  The sensor 120 is joined to the tip of the nozzle 104 by welding, and the protective member 122 is assembled to the nozzle 104 by press fitting, and is fixed to the nozzle 104 by plastically deforming the outer periphery.

  A fixing structure of the protection member 122 and the nozzle 104 will be described with reference to FIG.

  2 is an enlarged cross-sectional view of a sensor fixing portion of the fuel injection device of FIG.

  The sensor 120 has an end on the proximal end side inserted into the inner periphery on the distal end side of the protective member 122 and is joined to the protective member 122 at a position indicated by reference numeral 125 by welding from the outer peripheral surface side of the protective member 122. Has been. The sensor 120 is fixed to the protective member 122 by the welded portion 125. The joining of the sensor 120 and the protection member 122 by welding can be performed before the sensor 120 and the protection member 122 are assembled to the nozzle 104. Therefore, if the sensor 120 and the protection member 122 are welded in advance before the assembly to the nozzle 104, heat at the time of welding of the welded portion 125 is not input to the nozzle 104.

  The sensor 120 is joined to the outer periphery of the tip end of the nozzle 104 by welding along the inner periphery of the end portion on the tip side. The welded portion 126 is for sealing the combustion gas, and is not intended for fixing the sensor 120. Accordingly, the amount of heat input to the welded portion 126 during welding can be reduced compared to welding intended to fix the sensor 120.

  In the nozzle 104, a V-shaped recess (groove) 104a is formed along the circumferential direction on the outer peripheral surface of the cylindrical portion (small diameter portion) 104C. A thin wall portion 122 a is formed along the circumferential direction at the base end side end portion of the protection member 122 except for the wiring portion of the sensor signal line 121. A plastic deformation portion 122 a provided at the end of the protective member 122 on the proximal end side is bent so as to enter the recess 104 a and is locked to the outer periphery of the nozzle 104.

  The recess 104a does not need to be provided on the entire circumference of the cylindrical portion 104C, and may be provided on a part of the circumferential direction so as to correspond to the thin portion 122a. The reduction in strength of the nozzle 104 can be suppressed when the recess 104a is limited to a part of the cylindrical portion 104C in the circumferential direction. Of course, if there is no problem in strength, the recess 104a may be provided on the entire circumference of the cylindrical portion 104C.

  An end portion (thin wall portion) 122 a on the proximal end side of the protection member 122 is plastically deformed in the radial direction and the central axis side and is accommodated in the recess 104 a of the nozzle 104. Thereby, the protection member 122 is fixed to the nozzle 104. In order to provide the protective member 122 with a plastically deformed portion, the material of the protective member 122 is a material that has a yield stress equal to or less than that of the nozzle 104.

  Thereby, the end 122a of the protection member 122 can be plastically deformed without deforming the nozzle 104. The protective member 122 can be fixed to the nozzle 104 without adversely affecting the performance (flow rate performance, oil tightness performance, etc.) of the fuel injection device 100.

Further, the protective member 122a has a structure in which a part of the outer diameter side of the protective member 122 including the end portion (thin wall portion) 122a plastically deformed is covered with the resin material of the housing 109 . Since the resin material of the housing 109 covers the plastic deformation portion formed by the thin portion 122a from the outer peripheral surface side, the resin material functions to maintain the plastic deformation state of the thin portion 122a.

  The protection member 122 has a seal disposition groove 122b for attaching the seal member 123 and a groove portion 122c used when the nozzle 104 is assembled.

  A plastic deformation portion (thin wall portion) 122 a in the protection member 122 fixes the sensor 120 to the nozzle 104 via the protection member 122 and the welded portion 125. The plastic deformation portion 122 a is provided at a portion of the sensor 104 on the side of the proximal end portion of the nozzle 104. The plastic deformation part 122a is formed by caulking, for example. Further, in the fixing structure of the sensor 120, the welded portion that receives heat with respect to the nozzle 104 is only the portion indicated by reference numeral 126.

  The nozzle 104 that affects the performance (flow rate performance, oil tightness performance, etc.) of the fuel injection device 100 when heat is applied to a portion on the proximal end side of the nozzle 104, particularly a portion closer to the proximal end portion than the sensor 120. The deformation is likely to occur. This is because the amount of deviation (eccentricity) from the central axis 100a increases on the tip side of the nozzle 104 when deformation occurs due to heat input to the nozzle 104 portion closer to the base end than the sensor 120. .

  In the present embodiment, heat input by welding is not required for the portion of the nozzle 104 closer to the base end than the sensor 120. Thereby, the deformation | transformation of the nozzle 104 by heat input can be suppressed, and the protection member 122 can be fixed to a nozzle. The protective member 122 can be fixed to the nozzle 104 without adversely affecting the performance (flow rate performance, oil tightness performance, etc.) of the fuel injection device 100.

  In this embodiment, the welded portion 126 is intended for sealing, and is not intended for fixing the sensor 120. For this reason, the heat input amount in the welded portion 126 can be reduced as described above. In this embodiment, since the amount of heat input by welding is reduced at a place where the influence of heat input on the deformation of the nozzle 104 is small, the deformation of the nozzle 104 can be effectively suppressed.

In this embodiment, the groove 122 d for wiring the sensor signal line 121 is provided in the protection member 122. For this reason, compared with the case where the groove | channel 122d is formed in the outer peripheral surface of the nozzle 104, the strength reduction of the nozzle 104 can be suppressed. In this embodiment, the recess 104 a is formed on the outer peripheral surface of the nozzle 104. For this reason, the strength reduction of the nozzle 104 can be suppressed by reducing the structure that may cause the strength reduction of the nozzle 104.
[Example 2]
A second embodiment according to the present invention will be described with reference to FIG. In the second embodiment, the same configuration as the first embodiment and the configuration having the same function as the first embodiment will be described using the same reference numerals as in the first embodiment and different contents from the first embodiment. Therefore, the description of the same contents (configuration / effects) as in the first embodiment is omitted. The basic structure of the fuel injection device is the same as that of the first embodiment shown in FIG.

  FIG. 3 is an enlarged cross-sectional view of the sensor fixing portion of the fuel injection device for a modified example of the sensor fixing portion.

  In this embodiment, the plastic deformation portion (thin wall portion) 122 a of the protection member 122 is engaged with the enlarged diameter portion (large diameter portion) 104 A of the nozzle 104, and the protection member 122 is fixed to the nozzle 104. For this purpose, the nozzle 104 is formed with a V-shaped recess (groove) 104a along the circumferential direction on the outer peripheral surface of the enlarged diameter portion 104A. The recess 104a of this embodiment is formed in the same manner as in the first embodiment except that the recess 104a is formed on the outer peripheral surface of the enlarged diameter portion 104A.

The protective member 122 corresponds to the enlarged diameter portion 104A, the reduced diameter portion 104B, and the cylindrical shape portion (small diameter portion) 104C of the nozzle 104, and the enlarged diameter portion 122A, the reduced diameter portion 122B, and the cylindrical shape portion (small diameter portion) 122C. It has the structure which has.
A thin-walled portion 122a is formed along the circumferential direction at the end of the protective member 122 on the side of the base end portion of the enlarged diameter portion 122A, excluding the wiring portion of the sensor signal line 121.

  The thin-walled portion 122a of the protective member 122 is plastically deformed by the enlarged diameter portion 104A of the nozzle 104 in the same manner as in the first embodiment, and is accommodated in the V-shaped concave portion 104a provided in the nozzle 104. Thereby, the protection member 122 is fixed to the nozzle 104.

  It is difficult to ensure the thickness of the cylindrical portion (small diameter portion) 122C in the nozzle 104 because of the layout of the mounting to the engine head. For this reason, in the first embodiment, the concave portion 104a, which is the fixing portion of the protection member 122, is provided in a portion where there is a limit to increasing the rigidity. On the other hand, the enlarged diameter portion 104A of the nozzle 104 can be increased in thickness, and the rigidity can be easily increased. As in this embodiment, the protective member 122 can be fixed at a location where the rigidity of the nozzle 104 is high by providing the fixed portion of the protective member 122 in the enlarged diameter portion 104A. Thereby, the width dimension and depth dimension of the recessed part 104a can be enlarged, and the amount of plastic deformation of the thin part (plastic deformation part) 122a can be enlarged. For this reason, the holding strength of the protection member 122 can be improved.

  In addition, this invention is not limited to each above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations. Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 101 ... Valve body, 102 ... Fixed valve, 102a ... Fuel injection hole, 102b ... Valve seat, 103 ... Guide member, 104 ... Nozzle, 104a ... Recessed part, 104A ... Wide diameter part (large diameter part) of nozzle, 104B ... Nozzle 104C ... Cylindrical part (small diameter part) of nozzle, 105 ... Mover guide, 106 ... Movable core, 107 ... Fixed core, 108 ... Coil, 109 ... Housing, 110A ... First spring, 110B ... No. 2 springs, 111... Regulator, 112 .. through hole, 112 a .. fuel supply port, 113 a... Terminal connected to coil 108, 113 b .. terminal connected to sensor 120, 114. 121, signal lines, 122, protective members, 122a, thin portions.

Claims (5)

A fuel supply port provided at the base end,
A fuel injection hole provided at a distal end which is an end opposite to the base end;
A hollow cylindrical body extending in the direction of the central axis connecting the base end and the tip, and a nozzle having a valve seat and the fuel injection hole at the end on the tip side;
A valve body provided inside the nozzle so as to be able to contact and separate from the valve seat;
A sensor provided on the outer periphery of the end of the nozzle on the tip side;
A holding member which is provided on the outer peripheral side of the nozzle on the base end side with respect to the sensor, and the sensor is fixed to an end on the tip end side;
The holding member includes a groove portion formed on the inner peripheral provided along the center axis direction, and the plastic deformation portion locked with the outer periphery of the nozzle is formed at an end portion of the side of the proximal end, the Yes, and
The sensor signal wiring output by the sensor is disposed in the groove,
A fuel injection device in which the plastic deformation portion is formed in a portion excluding the wiring arrangement portion in the circumferential direction . The fuel injection device according to claim 1,
The fuel injection device, wherein a yield stress of a material of the holding member is the same as a yield stress of a material of the nozzle or smaller than a yield stress of a material of the nozzle. The fuel injection device according to claim 2, wherein
The nozzle includes a recess formed in the circumferential direction on the outer peripheral surface,
The fuel injection device, wherein the plastic deformation portion is bent so as to enter the recess and is locked to the outer periphery of the nozzle. The fuel injection device according to claim 3, wherein
The nozzle has a large diameter portion and a small diameter portion,
The recess is formed in the large diameter portion of the nozzle,
The holding member has a large diameter portion and a small diameter portion corresponding to the large diameter portion and the small diameter portion of the nozzle,
The plastic deformation portion is a fuel injection device provided in the large diameter portion of the holding member. The fuel injection device according to claim 1,
The said plastic deformation part is a fuel-injection apparatus covered with the resin material from the outer peripheral surface side .

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