Abstract: The purpose of the present invention is to provide a fuel injection valve that can achieve sufficient atomization even if the spray angle is narrow.

Abstract: A fuel injection valve includes a valve seat 15b and a valve body 27c that cooperate with each other to open and close a fuel passage, a movable element 27 that has the valve body 27c provided at one end thereof and has a fuel passage formed therein, a valve seat member 15 having the valve seat 15b formed thereon, an upstream-side communication hole 27boa that is located upstream of the flow of fuel and connects the inside and outside of the movable element 27, and a downstream-side communication hole 27bob that is located downstream of the flow of fuel and connects the inside and outside of the movable element, in which a guide section for the valve body 27c, where the valve seat member 15 and the valve body 27c are in sliding contact with each other, is provided downstream of the downstream-side communication hole 27bob and in which a fuel passage 17h for connecting in the center axis direction the upstream side and downstream side of the guide section is provided at the same angular position in the circumf

Abstract: An object of the invention is to achieve sufficient atomization, while preventing a spray from spreading. A fuel injection valve includes a plurality of swirl fuel injection passages. Each of the swirl fuel injection passages includes a swirl chamber, a swirl chamber introduction passage, and an orifice and imparts a swirling force to fuel to thereby inject the fuel outside. A rectangular coordinate system is imagined on an imaginary plane. The rectangular coordinate system has a center of an inlet opening surface of the orifice as an origin and has an X-axis extending in parallel with a centerline of the swirl chamber introduction passage and being positive in a direction from an upstream side toward a downstream side of the swirl chamber introduction passage and a Y-axis extending perpendicularly to the X-axis and being positive in a direction away from the centerline.

Abstract: In the present invention, two side-section side surfaces and each horizontal passage run along a fuel flow direction and have a linear section, and an end-section side surface formed between the two side-section side surfaces and forming an upstream-side end portion has a curved section connected to the side-section side surfaces and. When a fuel inlet and the horizontal passages are projected onto a plane perpendicular to a valve axial center, a projected line of the linear section of each of the horizontal passages extends to a place intersecting a projected line of the opening edge of the fuel inlet, and the upstream-side end portion of each of the horizontal passages extends toward the inside of the opening edge.

Abstract: A fuel injection valve includes a valve seat 15b and a valve body 27c that cooperate with each other to open and close a fuel passage, a movable element 27 that has the valve body 27c provided at one end thereof and has a fuel passage formed therein, a valve seat member 15 having the valve seat 15b formed thereon, an upstream-side communication hole 27boa that is located upstream of the flow of fuel and connects the inside and outside of the movable element 27, and a downstream-side communication hole 27bob that is located downstream of the flow of fuel and connects the inside and outside of the movable element, in which a guide section for the valve body 27c, where the valve seat member 15 and the valve body 27c are in sliding contact with each other, is provided downstream of the downstream-side communication hole 27bob and in which a fuel passage 17h for connecting in the center axis direction the upstream side and downstream side of the guide section is provided at the same angular position in the circumf

Abstract: The present invention includes a bobbin having a winding part around which a coil winding is wound, a terminal extending from the bobbin in the axial direction of the bobbin, and a wrapping part which is provided to the terminal and in which a terminal lead wire pulled out from a coil part that is wound around the winding part is wrapped and fused. The terminal lead wire wired between the bobbin and the wrapping part in a state of being in contact with the surface of the terminal. The peripheries of the bobbin, the wiring part of the terminal lead wire and the wrapping part are covered with resin.

Abstract: Electromagnetic solenoid has movable core having end surface that is formed between inner circumferential surface and outer circumferential surface of movable core; and fixed core having end surface that is formed between inner circumferential surface and outer circumferential surface of fixed core and faces the end surface of movable core. Ring-shaped protruding portion is formed at least either one of the end surface of the movable core or the end surface of the fixed core. Protruding portion is provided at a position that is shifted to a radially inner circumferential side of the end surface. A length between apex and inner circumferential edge of protruding portion is shorter than a length between the apex and an outer circumferential edge of protruding portion.

Abstract: There is provided a solenoid pipe including a pipe formed of a ferromagnetic material containing 15 mass % or more to 18 mass % or less of Cr, an electromagnetic coil, and a valve body. A part of the pipe includes a reform portion, and the reform portion has a composition in which a component of the ferromagnetic material is mixed with a component of a Ni-containing material. e/d which is a ratio of a maximum deformation amount e of an outer circumferential surface side of the reform portion of the pipe with respect to a thickness d of the pipe near the reform portion is 0.5 or less, and c/d which is a ratio of a maximum deformation amount c of an inner circumferential surface side of the reform portion of the pipe with respect to the thickness d of the pipe is 0.5 or less. Accordingly, it is possible to obtain a locally feeble magnetized pipe with high dimensional accuracy and the solenoid valve using the pipe.

Abstract: It is an object of the present invention to provide a fuel injection valve that can increase the collision force of the fuel with respect to the injection hole inner wall surface and which can realize a sufficient atomization. In an imaginary plane orthogonal to a center axis line direction of a valve body, a plurality of injection holes through and through constituting a first injection hole set are formed such that an injection hole center axis extending from an injection hole inlet surface toward an injection hole outlet surface is formed to extend in a direction different from that of a straight line connecting the origin of an imaginary orthogonal coordinate system formed by an imaginary X-axis and an imaginary Y-axis and the center of an injection hole inlet surface and that the center of an injection hole outlet surface is situated close to the imaginary X-axis with respect to the center of the injection hole inlet surface.

Abstract: The present invention includes a valve seat and a valve body that cooperatively open/close a fuel passage, a movable element having the valve body provided at one end part thereof and a movable iron core 27a provided at the other end part thereof, a fixed iron core 25 which faces the movable iron core 27a and which attracts the movable iron core 27a by applying a magnetic attraction force thereto, and a cylindrical member that includes thereinside the fixed iron core 25 and the movable iron core 27a. The fixed iron core 25 includes a reduced-diameter part 25m on an outer circumferential surface at the side facing the movable iron core 27a, and the movable iron core 27a includes a reduced-diameter part 27am on an outer circumferential surface at the side facing the fixed iron core 25.

Abstract: The present invention includes a bobbin having a winding part around which a coil winding is wound, a terminal extending from the bobbin in the axial direction of the bobbin, and a wrapping part which is provided to the terminal and in which a terminal lead wire pulled out from a coil part that is wound around the winding part is wrapped and fused. The terminal lead wire wired between the bobbin and the wrapping part in a state of being in contact with the surface of the terminal. The peripheries of the bobbin, the wiring part of the terminal lead wire and the wrapping part are covered with resin.

Abstract: There is provided a manufacturing method of a hollow composite magnetic member having weakened magnetism in a portion of a ferromagnetic hollow member, the method includes: a step of forming a weak-magnetic area having weakened magnetism by melting and mixing a Ni-containing material and the hollow member by continuously supplying the Ni-containing material to a portion of the hollow member and heating the irradiation area having a line segment shape with the laser beam. Accordingly, since it is possible to prevent drop of a local portion of a hollow ferromagnetic pipe from being easily generated by a weak-magnetization treatment, to greatly reduce deformation generated by laser irradiation, and it becomes unnecessary to adjust the shielding gas pressure inside the pipe, the weak-magnetization treatment can be performed with higher efficiency and higher quality.

Abstract: There is provided a hollow composite magnetic member obtained by partially reforming a hollow member which is formed of a ferromagnetic material containing Cr of 15 mass % or more and 18 mass % or less, in which the reformed portion includes an alloy containing Cr of 8 mass % or more and 18 mass % and Ni of 6.5 mass % or more and 50 mass % or less. Accordingly, a hollow composite magnetic member having a small width of the nonmagnetic portion and a fuel injection valve having the same can be provided.

Abstract: Disclosed is a fuel injection valve comprising: a fuel injection orifice provided in a downstream side of a valve seat which a valve body moves toward and away from; a swirl chamber having a swirl passage formed around the entry opening of the fuel injection orifice; and a transverse passage whose end is opened in an inner circumferential wall of the swirl chamber in order to provide a fuel into the swirl chamber, wherein a center of the entry opening is shifted from a first position where the velocity component in the swirl direction of the fuel can be maximized to a second position where the velocity component in the swirl direction is reduced, and where a velocity component in a center axis direction of the fuel injection orifice is enhanced. Thereby, it is possible to easily adjust a fuel injection amount and a spray angle.

Abstract: A fuel injection valve includes a valve seat 15b and a valve body 27c that cooperate with each other to open and close a fuel passage, a movable element 27 that has the valve body 27c provided at one end thereof and has a fuel passage formed therein, a valve seat member 15 having the valve seat 15b formed thereon, an upstream-side communication hole 27boa that is located upstream of the flow of fuel and connects the inside and outside of the movable element 27, and a downstream-side communication hole 27bob that is located downstream of the flow of fuel and connects the inside and outside of the movable element, in which a guide section for the valve body 27c, where the valve seat member 15 and the valve body 27c are in sliding contact with each other, is provided downstream of the downstream-side communication hole 27bob and in which a fuel passage 17h for connecting in the center axis direction the upstream side and downstream side of the guide section is provided at the same angular position in the circumf

Abstract: The purpose of the present invention is to provide a fuel injection valve that can achieve sufficient atomization even if the spray angle is narrow.

Abstract: A fuel injection valve realizing improved circumferential uniformity of swirling fuel is provided. The fuel injection valve includes a swirling chamber having an inner peripheral wall whose curvature is gradually larger from upstream to downstream, a path for swirling which, having a fuel flow-in region formed along a valve axis direction, guides fuel to the swirling chamber, and a fuel injection orifice open into the swirling chamber. In the fuel injection valve, the path for swirling is inclined toward the fuel injection orifice formed on a downstream side of the swirling chamber.

Abstract: One passage for swirling is formed in an orifice plate fixed on a nozzle body. Two swirl chambers in which fuel is caused to swirl so that the fuel has swirling force are provided at an end of the one passage for swirling on the downstream side of the flow direction of fuel. Therefore, the collision between the swirling flow in the swirl chamber and the fuel flowing in the passage for swirling is mitigated, and the swirling flow can be smoothly produced to promote pulverization of sprays injected from fuel injection ports.

Abstract: An object of the present invention is to provide a fuel injection valve that is made superior in atomization performance by preventing an influence of minute deformation occurring when an orifice plate is assembled to a nozzle body, thereby reducing fuel leakage from a swirling passage to increase the strength of a swirl flow. The valve includes a valve body openable and closable to jet fuel; a nozzle body having a valve seat surface capable of coming into contact with the valve body to block the jet of fuel; and an orifice plate disposed downstream of the valve seat surface and having a plurality of fuel injection holes adapted to jet swirl fuel. The nozzle body has an end face portion with a downwardly convex inclined surface.

Abstract: One passage for swirling is formed in an orifice plate fixed on a nozzle body. Two swirl chambers in which fuel is caused to swirl so that the fuel has swirling force are provided at an end of the one passage for swirling on the downstream side of the flow direction of fuel. Therefore, the collision between the swirling flow in the swirl chamber and the fuel flowing in the passage for swirling is mitigated, and the swirling flow can be smoothly produced to promote pulverization of sprays injected from fuel injection ports.