JP2001248521A - Fuel injection nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel injection nozzle for preventing change of an injection characteristic by reducing uneven abrasion of a valve part comprising a valve member and a valve seat. SOLUTION: A fuel passage 26 extending in an axial direction is formed on an axial center part of a nozzle needle 20. The fuel passage 26 is provided with an inlet passage 27 which is positioned on a reverse injection hole side of the nozzle needle 20 and which is separated from a fuel outlet 28a in an axial direction, and a center passage 28 which is communicated with the inlet passage 27 and which is formed on the axial center part of the nozzle needle 20. The inlet passage 27 is formed so as to communicate with the center passage 28 outside a center axis of the nozzle needle 20 from a fuel inlet 27a. When an abutting part 25 is separated from the valve seat 13 and fuel flows from the inlet passage 27 to the center passage 28, fuel flow flows out from the fuel outlet 28 as turning flow and is injected from a flow-out injection hole 11a. The nozzle needle 20 is rotated by force received from flow of fuel which flows from the inlet passage 27 to the center passage 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fuel injection nozzle, and more particularly to a fuel injection nozzle of a fuel injection valve for an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, a nozzle body is accommodated in a valve body so as to be reciprocally movable, and a contact portion of the nozzle needle is seated on a valve seat formed on the valve body and is separated from the valve seat, so that a nozzle hole is formed. 2. Description of the Related Art A fuel injection nozzle of an internal combustion engine fuel injection valve for intermittently injecting injected fuel is known.

[0003] In such a fuel injection nozzle, for example, if the axis of the contact portion and the valve seat are misaligned, the contact portion locally collides with the valve seat when seated, and the contact portion and the valve seat are displaced. There may be uneven wear at the collision point of the seat. When uneven wear occurs in the contact portion and the valve seat, the seat area of the valve portion formed by the contact portion and the valve seat changes, the valve opening pressure fluctuates, and fuel may leak from the valve portion.

Therefore, by changing the circumferential position of the contact portion seated on the valve seat, it is possible to reduce uneven wear of the contact portion and the valve seat even if the axis of the nozzle needle and the valve seat are misaligned. It is conceivable to rotate the nozzle needle during fuel injection. For example, there has been known a fuel injection nozzle having a configuration in which a blade is provided at an outer peripheral end of a nozzle needle, and a fuel flow collides with the blade to rotate the nozzle needle.

[0005]

However, when the blade provided at the tip of the nozzle needle has a point-symmetric shape with respect to the center axis of the nozzle needle, the fuel flow uniformly collides with the blade and the nozzle needle rotates. May disappear. If the nozzle needle does not rotate, uneven wear of the contact portion and the valve seat cannot be reduced.

A fuel injection nozzle having a fuel passage inside a nozzle needle for atomizing fuel spray, such as the fuel injection nozzle disclosed in JP-A-11-193766, has become effective. I have. However, in the fuel injection nozzle disclosed in Japanese Patent Application Laid-Open No. 11-193766, when the axle of the contact portion and the valve seat are misaligned,
A configuration for reducing uneven wear of the contact portion and the valve seat is not shown.

An object of the present invention is to provide a fuel injection nozzle that reduces uneven wear of a valve portion formed by a valve member and a valve seat and prevents a change in injection characteristics. Another object of the present invention is to provide a fuel injection nozzle capable of atomizing fuel spray and increasing the spray angle.

[0008]

According to the fuel injection nozzle of the present invention, the valve member is rotated by the fuel flow flowing from the fuel inlet of the fuel passage provided inside the nozzle needle and flowing out of the fuel outlet. There is provided a rotational force applying means for applying a force. For this reason, even if the axis of the contact portion of the valve member and the valve seat of the valve seat member are misaligned due to a processing error or the like, the contact portion collides with the valve seat when the contact portion is seated on the valve seat. The location changes, reducing uneven wear of the abutment and valve seat. Since the seat area of the valve portion formed by the contact portion and the valve seat increases, fuel can be prevented from leaking from the contact portion. Further, since the seat area can be kept constant in a state where the seat area is large, the valve opening pressure becomes constant and the valve opening timing does not vary. Therefore, a change in the injection characteristics can be prevented.

According to the fuel injection nozzle of the present invention, the inlet passage of the fuel passage is formed off the center axis of the valve member from the fuel inlet. The torque is reliably applied, and the valve member rotates. Therefore, the collision portion between the contact portion and the valve seat at the time of seating is evenly distributed in the circumferential direction, and uneven wear at the contact portion between the valve member and the valve seat can be reliably reduced. Furthermore, uneven wear of the contact portion and the contact portion of the valve seat can be reduced with a simple configuration in which the inlet passage of the fuel passage formed inside the valve member is formed off the center axis of the valve member. Therefore, the number of processing steps for each member can be reduced, and the manufacturing cost can be reduced. Furthermore, since the fuel flows in with the center axis of the valve member deviated from the inlet passage, the fuel flow flowing out of the fuel outlet becomes a swirling flow. When the swirling flow flows into the injection hole and is injected, atomization of the fuel spray is promoted, and the spray angle increases.

According to the fuel injection nozzle of the third aspect of the present invention, since the inlet passage is formed so as to be inclined toward the injection hole side, the fuel smoothly flows from the inlet passage to another portion of the fuel passage. . Since the resistance acting on the fuel flow decreases and the flow velocity of the fuel flow increases, the rotational force applied to the valve member by the fuel flow increases. Further, the atomization of the fuel which is swirled from the inlet passage and flows out from the fuel outlet and is injected from the injection hole is promoted, and the spray angle is increased.

According to the fuel injection nozzle of the fourth aspect of the present invention, in addition to the configuration of the second or third aspect, a projection protruding radially of the valve member on the inner wall of the valve member forming the fuel passage. Alternatively, a concave portion that is concave in the radial direction is formed.
The fuel that flows in as a swirling flow from the inlet passage collides with a convex portion or a concave portion formed on the inner wall of the passage, so that a further rotational force is applied to the valve member. Therefore, the valve member surely rotates.

When the fuel flow applies a rotational force to the valve member, the fuel flow may be disturbed in the rotational force applying means. According to the fuel injection nozzle according to the fifth aspect of the present invention, the rotational force applying means is separated from the fuel outlet and arranged on the side opposite to the injection hole of the valve member. Since the turbulence of the fuel flow is reduced before the turbulent fuel flow reaches the fuel outlet in the rotational force applying means, the flow direction of the fuel flowing into the injection holes or the fuel inflow amount for each injection hole becomes uniform. Therefore, it is possible to prevent the injection characteristics from changing.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; (First Embodiment) FIGS. 1, 2 and 3 show a first embodiment in which the fuel injection nozzle of the present invention is applied to a fuel injection valve for a diesel engine. A fuel injection valve 1 shown in FIG. 2 is an electromagnetically controlled fuel injection valve for intermittently injecting fuel into a combustion chamber of a diesel engine (not shown). Are connected to the fuel inlet 30, and high-pressure fuel is supplied from the common rail. An electronic control unit (not shown) (hereinafter, “electronic control unit” is referred to as an ECU)
Is connected to the connector 41, and the fuel injection of the fuel injection valve 1 is controlled by the control signal sent from the ECU.

A fuel injection nozzle 10 is arranged on one axial side of the fuel injection valve 1, that is, on the side of the injection hole 11a. The fuel injection nozzle 10 includes a valve body 11 and a valve seat member 13.
And a nozzle needle 20 as a valve member. A spacer 14 is sandwiched between the valve body 11 and the housing 15, and a retaining nut 16 is screwed between the valve body 11 and the housing 15. A spring 17 as an urging means urges the nozzle needle 20 in a nozzle hole closing direction via a spring seat 18.

The housing inner wall 12 of the valve body 11 has a housing hole 12a for housing the nozzle needle 20. The accommodation holes 12a have substantially the same diameter. The housing inner wall 12 supports the nozzle needle 20 so as to be capable of reciprocating sliding and rotatable about a central axis. An injection hole 11a is formed in the side wall on the bottom side of the housing inner wall of the valve body 11. Valve seat member 13
The valve body 11 is accommodated in the bottom of the accommodation inner wall 12 of the valve body 11 while forming a minute clearance with the side wall of the accommodation inner wall 12. A valve seat 13a is formed on the valve seat member 13, and the nozzle needle 20 can be seated on the valve seat 13a.

The fuel supplied from the fuel inlet 30 to the fuel injection valve 1 passes through fuel supply passages 31, 32, and 33 and is supplied to a fuel reservoir 34 formed around the nozzle needle 20. Nozzle needle 20 is valve seat 13
By seating at a, fuel injection from the injection hole 11a is shut off. The fuel pool 34 is formed on the inner wall 1 on the side opposite to the injection hole.
2 form an annular shape on the outer periphery of the nozzle needle 20. The fuel reservoir 34 communicates with the fuel supply passage 33 and a later-described fuel inlet 27a.

As shown in FIG. 1, the nozzle needle 20
Has a hollow cylindrical shape, and includes a protrusion 21 and a cylindrical portion 22.
have. The protrusion 21 is formed at the other end of the nozzle needle 20 in the axial direction, that is, at the end opposite to the injection hole, and has a contact surface 18 a formed on the spring seat 18 (see FIG. 2) and the center axis of the nozzle needle 20. Contacting on The cylindrical portion 22 includes a large diameter portion 22a, a small diameter portion 22b, a large diameter portion 22c,
The small-diameter portion 22d and the large-diameter portion 22e are provided in this order from the anti-injection hole side toward the injection hole side which is one axial direction side. Large diameter part 2
2a, 22c, and 22e have the same outer diameter and are supported by the inner wall 12 with a small sliding clearance. The step 22 is located on the side of the column 22 opposite the burial mound and at the base of the protrusion 21.
f is formed. The step portion 22f is provided with the nozzle needle 2
During the zero lift, the spacer 14 is locked to a stopper surface 14a formed on the injection hole side of the spacer 14 (see FIG. 2).

A small-diameter taper portion 23 is formed at the injection hole side end of the nozzle needle 20 from the inner peripheral side, and a large-diameter taper portion 24 is formed on the outer periphery thereof continuously from the small-diameter taper portion 23. The inclination angle of the large-diameter tapered portion 24 with respect to the central axis extending in the reciprocating direction of the nozzle needle 20 is larger than the inclination angle of the small-diameter tapered portion 23. Therefore, the boundary between the small-diameter taper portion 23 and the large-diameter taper portion 24 is protruding toward the valve seat 13a, and forms a contact portion 25. This is to allow the contact portion 25 to come into contact with the valve seat 13a when the valve is closed, thereby ensuring oil tightness.

A fuel passage 26 extending in the axial direction is formed at the center of the shaft of the nozzle needle 20. Fuel passage 26
Is located on the side opposite to the injection hole of the nozzle needle 20 and the fuel outlet 2
The nozzle needle 20 has an inlet passage 27 axially separated from the inlet passage 8a, and a central passage 28 formed in the center of the shaft of the nozzle needle 20 in communication with the inlet passage 27. The inlet passage 27 has a fuel inlet 27a that opens to the outer peripheral wall of the small diameter portion 22b. The inlet passage 27 communicates with the fuel reservoir 34 and the central passage 28. The central passage 28 is the nozzle needle 2
A fuel outlet 28a is provided at the end of the nozzle hole 0. When the contact portion 25 is separated from the valve seat 13a, the fuel flows out from the fuel outlet 28a.

As shown in FIG. 3, the inlet passage 27 is formed so that the center axis of the nozzle needle 20 is removed from the fuel inlet 27a and communicates with the center passage 28. Inlet passage 27
Are formed in the same direction as the tangent line in FIG. 3 of the passage inner wall 29 of the nozzle needle 20 forming the central passage 28. Therefore, the contact portion 25 is separated from the valve seat 13a,
When fuel flows into the central passage 28 from the inlet passage 27, the nozzle needle 20 rotates in the direction of arrow A. That is, the inlet passage 27 constitutes a rotational force applying means.

The electromagnetic drive unit 40 shown in FIG. 2 has a pressure control chamber (not shown) disposed on the side opposite to the injection hole of the nozzle needle 20, and the fuel pressure in the pressure control chamber is controlled by the nozzle needle 20 passing through the injection hole 11 a. It works in the direction of closing. The pressure control chamber communicates with the fuel supply passage 31 and has a fuel inlet for introducing high-pressure fuel from the fuel inlet 30 and a fuel outlet for communicating with the low-pressure side. By turning on and off the energization of the electromagnetic drive unit 40, an electromagnetic two-way valve (not shown) opens and closes the fuel outlet of the pressure control chamber. The nozzle needle 20 reciprocates as the fuel pressure in the pressure control chamber increases or decreases.

Next, the operation of the fuel injection valve 1 will be described. (1) Since the power supply to the electromagnetic drive unit 40 is turned off and the fuel outlet of the pressure control chamber is closed, the nozzle needle 20 is ejected from the sum of the urging force of the spring 17 and the force received from the fuel pressure of the pressure control chamber. The force received in the hole closing direction is caused by the fuel flowing around the nozzle needle 20 from the nozzle needle 2.
0 is greater than the force received in the lift direction. Therefore,
Since the contact portion 25 is seated on the valve seat 13a and closes the fuel outlet 28a, fuel is not injected from the injection hole 11a.

(2) When the power supply to the electromagnetic drive unit 40 is turned on, the fuel outlet of the pressure control chamber is opened and the high pressure fuel in the pressure control chamber flows out to the low pressure side, so that the fuel pressure in the pressure control chamber decreases. Then, the nozzle needle 2 is determined from the sum of the biasing force of the spring 17 and the force received from the fuel pressure in the pressure control chamber.
Since the force which the nozzle 0 receives in the injection hole closing direction is smaller than the force which the nozzle needle 20 receives in the lift direction from the fuel flowing around the nozzle needle 20, the contact portion 25 is separated from the valve seat 13a. .

When the contact portion 25 separates from the valve seat 13a,
Fuel flows into the central passage 28 from the fuel supply passages 31, 32, 33, the fuel reservoir 34, and the inlet passage 27. The inlet passage 27 is formed at a position deviated from the central axis of the nozzle needle 20 and communicates with the central passage 28, so that the inlet passage 27 flows from the inlet passage 27 into the central passage 28 formed extending along the central axis of the nozzle needle 20. The fuel is swirled in the central passage 28. Then, this swirling flow is applied to the contact portion 25 and the valve seat 13a.
Out of the fuel outlet 28a through the opening of
Fuel is injected from 1a. The maximum lift amount of the nozzle needle 20 is such that the stepped portion 22 f has the stopper surface 1 of the spacer 14.
It is regulated by being locked to 4a.

The fuel introduced into the fuel reservoir 34 is shown in FIG.
As shown in the figure, the fuel flows from the fuel reservoir 34 into the central passage 28 through the fuel inlet 27a of the inlet passage 27. As described above, the inlet passage 27 communicates with the central passage 28 at a position off the central axis of the nozzle needle 20, so that when fuel flows into the central passage 28 from the fuel inlet 27a, the nozzle needle 20 A rotational force in the direction indicated by arrow A is applied, and the nozzle needle 20 rotates. At this time, since the projection 21 rotates and slides on the spring seat 18 on the axis of the nozzle needle 20, the contact area between the projection 21 and the spring seat 18 is small, and the contact position does not move. Therefore, since the resistance when the nozzle needle 20 rotates is small, the nozzle needle 20 surely rotates.

(3) When the power supply to the electromagnetic drive unit 40 is turned off, the fuel outlet of the pressure control chamber is closed, and the fuel pressure in the pressure control chamber increases. Then, the contact portion 25 is seated on the valve seat 13a and closes the fuel outlet 28a, so that the fuel injection from the injection hole 11a is shut off. Nozzle needle 20 that was rotating
Stops rotating when the contact portion 25 is seated on the valve seat 13a. Since the nozzle needle 20 does not necessarily rotate by an integral multiple of 360 ° and does not sit on the valve seat 13a, the contact portion 25
The position in the rotational direction where the user sits on the valve seat 13a is different each time the user sits.

In the first embodiment, during fuel injection, the nozzle needle 20 is rotated by the force received from the fuel flowing from the inlet passage 27. For this reason, even if the axial center of the contact part 25 and the valve seat 13a is misaligned due to a processing error or the like, the location where the contact part 25 collides with the valve seat 13a changes in the circumferential direction every injection. Therefore, uneven wear of the contact portion 25 and the valve seat 13a can be reduced, and the contact portion 25 and the valve seat 13a can be reduced.
Sheet area can be increased. Therefore, it is possible to prevent fuel from leaking from the contact portion between the contact portion 25 and the valve seat 13a. Furthermore, since the seat area can be kept constant in a state where the seat area is large, the valve opening pressure,
That is, the valve opening timing can be kept constant. Therefore, a change in the injection characteristics can be prevented.

Further, the inlet passage 27 is formed so as to be separated from the fuel outlet 28a of the fuel passage 26 on the side opposite to the injection hole.
Even if the fuel flow is disturbed when flowing from the inlet passage 27 into the central passage 28 and rotating the nozzle needle 20, the disturbance of the fuel flow is reduced before reaching the fuel outlet 28a.
Therefore, the direction of fuel flow and the amount of fuel flowing into the injection hole 11la during fuel injection become uniform, and a change in injection characteristics can be prevented.

Further, since the fuel flow flowing from the inlet passage 27 is swirled in the central passage 28, the flow velocity of the fuel flow is increased. Therefore, the fuel spray injected from the injection hole 11a is atomized in a short time and has a uniform distribution. Further, since the spray angle increases, good injection characteristics are obtained for the internal combustion engine.

Further, the nozzle needle 20 is rotated by a simple structure in which the inlet passage 27 of the fuel passage 26 formed inside the nozzle needle 20 is formed off the center axis of the nozzle needle 20, and the contact portion 25 and The uneven wear of the valve seat 13a is reduced, and the injection characteristics are prevented from changing. Therefore, the number of processing steps for each member can be reduced, and the manufacturing cost can be reduced.
In the first embodiment, the valve seat 13a is provided on the valve seat member 13, which is a separate member from the valve body 11, but the valve body and the valve seat member can be formed integrally by the structure of the fuel injection nozzle. is there.

(Modification) FIG. 4 shows a modification of the first embodiment. The inlet passage 50 as the rotational force applying means is closer to the central axis of the nozzle needle 20 than the inlet passage 27 of the first embodiment. Although it is closer to the central axis of the nozzle needle 20 than in the first embodiment, it is deviated from the central axis, so that the fuel flows from the inlet passage 50 into the central passage 28 so that the nozzle needle 20 moves in the direction of arrow A. Receive rotational force.

(Second Embodiment) FIG. 5 shows a second embodiment of the present invention.
Shown in Components that are substantially the same as those in the first embodiment are denoted by the same reference numerals. At a position spaced apart from the fuel outlet 28a of the passage inner wall 29 forming the central passage 28 on the side opposite to the injection hole, a convex portion 61 as a rotational force applying means projecting radially inward of the nozzle needle 60 is equiangularly spaced in the circumferential direction. Are formed.
The projection 61 has a point-symmetric shape with respect to the central axis of the nozzle needle 60. Since the inlet passage 27 is formed off the central axis of the nozzle needle 60, the fuel flowing from the inlet passage 27 into the central passage 28 is swirled toward the fuel outlet 28a. When this swirling flow collides with the convex portion 61,
The nozzle needle 60 receives the rotational force in the same arrow A direction as the rotational force received by the nozzle needle 60 due to the fuel flowing from the inlet passage 27 into the central passage 28. As a result, a greater rotational force is applied to the nozzle needle 60 than in the first embodiment, and the nozzle needle 60 is reliably rotated.

(Modification) A modification of the second embodiment shown in FIG. 6 is a modification of the second embodiment as a rotational force applying means recessed radially outward of the nozzle needle 65 in the passage inner wall 29 of the nozzle needle 65 forming the central passage 28. The recess 66 is formed.
Similarly to the second embodiment, when the swirling flow flowing through the central passage 28 collides with the concave portion 66, the nozzle needle 65 moves in the same arrow A direction as the rotational force received by the nozzle needle 65 due to the fuel flowing from the inlet passage 27 into the central passage 28. Receive rotational force. As a result, a larger rotational force is applied to the nozzle needle 65 than in the first embodiment, and the nozzle needle 65 is reliably rotated.

Here, the convex portion 61 of the second embodiment and the concave portion 66 of the modification of the second embodiment can serve as a rotational force applying means regardless of the axial position of the passage inner wall 29.
However, if the fuel outlet 28a is formed as far as possible from the fuel outlet 28a on the side opposite to the injection hole, the turbulence of the fuel flow caused by the collision of the swirling flow with the projection 61 or the recess 66 causes the fuel outlet 2
8a, so that the direction of fuel flow and the amount of fuel flowing into the injection hole 11a during fuel injection become uniform, thereby preventing a change in injection characteristics.

(Third Embodiment) FIG. 7 shows a third embodiment of the present invention.
Shown in Components that are substantially the same as those in the first embodiment are denoted by the same reference numerals. The fuel passage 71 formed inside the nozzle needle 70 has an inlet passage 72 and a central passage 28. The inlet passage 72 extends from the fuel inlet 72 a to the fuel outlet 28.
The nozzle needle 70 is formed so as to deviate from the central axis of the nozzle needle 70 toward the a side, that is, toward the injection hole side, and to be inclined. Since the inlet passage 72 is inclined toward the fuel outlet 28a, the fuel inlet 72a
The resistance received by the fuel flowing into the central passage 28 from the central passage 28 through the inlet passage 72 decreases. Then, the flow velocity of the swirling flow flowing through the central passage 28 increases, so that atomization of the fuel spray injected from the injection hole 11a is promoted and the spray angle increases.

In the above-described embodiments and modifications of the present invention described above, the fuel passage is formed inside the nozzle needle, and the inlet passage of the fuel passage 26 is formed by displacing the center axis of the nozzle needle from the fuel inlet. ing. This allows
During fuel injection, the nozzle needle receives a rotational force from the fuel flow flowing into the inlet passage and rotates. Rotation of the nozzle needle during fuel injection changes the collision location when the contact portion is seated on the valve seat, thereby reducing uneven wear of the contact portion and the valve seat due to the collision during seating. Further, by preventing uneven wear, the seat area between the contact portion and the valve seat increases, so that fuel leakage when the valve is closed can be prevented. Further, since the seat area can be kept constant with the seat area increased, the valve opening pressure becomes constant and the valve opening timing becomes constant. Therefore, the injection characteristics do not change, and the fuel injection characteristics can be controlled with high accuracy.

In the above embodiments, the present invention is applied to the fuel injection valve which lifts the nozzle needle by adjusting the fuel pressure in the pressure control chamber provided on the side opposite to the injection hole of the nozzle needle. The present invention may be applied to a fuel injection valve that lifts the nozzle needle by sucking the nozzle needle by the magnetic force generated in the fuel injection valve, or a configuration using a force due to an electrostrictive effect instead of an electromagnetic force. Also,
The present invention may be applied to a fuel injection valve for a gasoline engine.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a fuel injection nozzle according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a fuel injection valve to which a fuel injection nozzle according to a first embodiment of the present invention is applied.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a transverse sectional view showing a fuel injection nozzle according to a modification of the first embodiment at the same sectional position as in FIG. 3;

FIG. 5 is a cross-sectional view of a fuel injection nozzle according to a second embodiment of the present invention, taken along a line VV in FIG. 1;

FIG. 6 is a transverse sectional view showing a fuel injection nozzle according to a modification of the second embodiment at the same sectional position as in FIG. 5;

FIG. 7 is a longitudinal sectional view showing a fuel injection nozzle according to a third embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 fuel injection valve 10 fuel injection nozzle 11 valve body 12 housing inner wall 12a housing hole 13 valve seat member 13a valve seat 20, 70 nozzle needle (valve member) 26, 71 fuel passage 27, 72 inlet passage (rotational force applying means, fuel Passage) 27a, 72a Fuel inlet 28 Central passage 28a Fuel outlet 29 Passage inner wall 61 Convex part (rotational force applying means) 66 Recess (rotary force applying means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Date 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (reference) 3G066 AA01 AA07 AB02 AC09 BA03 BA36 BA49 BA55 CC06U CC08T CC10 CC14 CC18 CC20 CC42 CC48 CC51 CC56 CC66 CE22 CE27 CE34 CE35

Claims (5)

[Claims] A valve member having a fuel outlet at an end on an injection hole side, a fuel passage having a fuel inlet on a side opposite to the injection hole, and an abutting portion on an outer peripheral side of the fuel outlet. A valve body having an accommodation hole for accommodating the valve member, wherein an accommodation inner wall forming the accommodation hole supports the valve member reciprocally slidably and rotatably around a central axis; and A valve seat member having a seat that can be seated, wherein the abutting portion closes the fuel outlet by being seated on the valve seat to block fuel injection from the injection hole, and the abutting portion is A fuel injection nozzle which opens the fuel outlet by injecting the fuel outlet from the valve seat to inject fuel from the injection hole, wherein the fuel member flows in from the fuel inlet and flows out of the fuel outlet, and the valve member Characterized by having a rotational force applying means for applying a rotational force to the Fuel injection nozzle that. 2. The rotational force applying means according to claim 2, wherein the fuel inlet is open to an outer peripheral side wall of the valve member, and an inlet passage of the fuel passage formed off the center axis of the valve member from the fuel inlet. The fuel injection nozzle according to claim 1, wherein: 3. The fuel injection nozzle according to claim 2, wherein the inlet passage is formed to be inclined toward the injection hole. 4. The method according to claim 1, wherein the rotational force applying means has a radially projecting convex portion or a radially concave concave portion of the valve member provided on a passage inner wall of the valve member forming the fuel passage. The fuel injection nozzle according to claim 2 or 3, wherein: 5. The fuel injection according to claim 1, wherein the rotational force applying means is disposed at a position opposite to the fuel outlet and on a side opposite to the injection hole of the valve member. nozzle.