Abstract: Provided is a discharge valve mechanism capable of improving responsiveness when a discharge valve is opened, and a high-pressure fuel supply pump including the discharge valve mechanism.

Abstract: Provided is a fuel supply pump capable of improving welding quality while securing a function of a valve body. A fuel supply pump of the present invention includes a regulating member (discharge valve stopper 84) that guides movement of a valve body (discharge valve 82), a main body portion (body 1) provided with a valve chamber (discharge valve chamber 1d) that houses the regulating member, a sealing member (plug 85) that seals the valve chamber, and a welded portion (welded portion 86) that fixes the sealing member to the main body portion. An annular space portion (annular space portion 60) along an outer periphery of the regulating member is formed between the welded portion and the regulating member.

Abstract: Provided is a discharge valve mechanism capable of improving responsiveness when a discharge valve is opened, and a high-pressure fuel supply pump including the discharge valve mechanism. A discharge valve mechanism 500 includes a valve seat portion 51 having a primary-side flow path, a valve body 52 which can be seated on and separated from the valve seat portion 51, and a guide portion 542a which is formed to be slidable on an outer surface of the valve body 52 and guides movement of the valve body 52 in a contacting/separating direction with respect to the valve seat portion 51. The guide portion 542a includes a portion in which a gap from the outer surface of the valve body 52 is set to a predetermined value or less.

Abstract: An object of the present invention is to secure a gap between a component on a suction valve side and a component on an anchor side when a valve is closed, regardless of an integration tolerance of a plurality of components, and to be able to reliably close the valve. In an electromagnetic valve mechanism 300 including an anchor assembly 36 and a magnetic core 33 between which a magnetic attraction force acts, and a suction valve 30 configured to be able to come into and out of contact with the anchor assembly 36, the anchor assembly 36 includes a first anchor assembly component 36a having a facing surface 36ab that faces the magnetic core 33, a second anchor assembly component 36b configured integrally with the first anchor assembly component 36a, and a press-fitting portion 36c that fixes the first anchor assembly component 36a and the second anchor assembly component 36b.

Abstract: Provided is a fuel supply pump capable of improving welding quality while securing a function of a valve body. A fuel supply pump of the present invention includes a regulating member (discharge valve stopper 84) that guides movement of a valve body (discharge valve 82), a main body portion (body 1) provided with a valve chamber (discharge valve chamber 1d) that houses the regulating member, a sealing member (plug 85) that seals the valve chamber, and a welded portion (welded portion 86) that fixes the sealing member to the main body portion. An annular space portion (annular space portion 60) along an outer periphery of the regulating member is formed between the welded portion and the regulating member.

Abstract: Provided is a fuel pump capable of improving productivity. According to the present invention, a fuel pump includes a pump body 1, a plunger 2, an electromagnetic suction valve 3, and a relief valve 4. The plunger 2 reciprocates in a first room 1a which is a columnar space portion provided in the pump body 1. The electromagnetic suction valve 3 causes fuel to be sucked into a pressurizing chamber 11 formed by the first room 1a and the plunger 2. When the fuel pressure on the downstream side of the pressurizing chamber 11 exceeds a set value, the relief valve 4 opens, and brings the fuel back to the pressurizing chamber 11. The pump body 1 includes a second room 1b in which the relief valve 4 is disposed, and a communication hole 1e for causing the first room 1a and the second room 1b to communicate with each other. The diameter of the communication hole 1e is equal to the diameter of the first room 1a.

Abstract: Provided is a fuel injection device that sets an electromagnetic attraction force, which is generated in a magnetic gap between a magnetic core and a movable element, to more than or equal to a desired value. The fuel injection device includes a movable element that is attracted to the magnetic core and a housing provided opposite to the movable element in a direction orthogonal to an axial direction, wherein the movable element is configured so that an axial length of the movable element is 1.25 to 1.46 times as long as an axial length of the housing.

Abstract: A fuel injection device is provided with reduced adherence of fuel spray with respect to an intake valve, a wall surface in an engine cylinder, or a piston. The fuel injection device includes a valve body and a seat surface to perform sealing of fuel cooperatively and injection holes. Inlet opening surfaces are formed on the seat surface. A first injection hole and a second injection hole arranged closest to the first injection hole. The first injection hole is larger than the second injection hole in an injection hole angle to be an angle formed by a normal direction of the seat surface and a center axis of the injection hole. The second injection hole is larger than the first injection hole in an area of a cross-section perpendicular to the center axis of the injection hole.

Abstract: Provided is a fuel injection device that can secure strength capable of withstanding high fuel pressure. In a fuel injection device in which a fuel boundary includes two or more components, two components are press-fitted with an inner diameter and an outer diameter and are brought into contact at a butting surface, abutting welding is performed from a direction nearly parallel to the butting surface, an inner diameter side corner portion of the butting surface of a component to be fitted and press-fitted on an inner diameter side is chamfered longer in a direction perpendicular to the butting surface to increase a welding coupling length than a butting length, welding coupling length is less than welding depth, weld penetration depth is not less than material thickness, and the center of the weld is on a base material side, the outer diameter of which is larger than a joining face.

Abstract: An object is to suppress an inclination of a waveform indicating an injection quantity with respect to an injection pulse particularly when a lift amount of a valve body is small and an injection pulse width is short, thereby improving control accuracy of the injection quantity of a fuel injection device. Thus, a control device for controlling a fuel injection device, which includes a valve body, a solenoid, and a movable element to open the valve body, is provided with a control unit that controls a drive voltage or a drive current to be applied to the solenoid, in which the control unit controls the drive current such that the drive current to be supplied to the solenoid decreases from a maximum drive current after the maximum drive current is supplied to the solenoid and before the valve body starts to open.

Abstract: Provided is a structure capable of reducing dribbling of fuel generated when a valve body is closed. In order to achieve the above object, a fuel injection device includes: a valve body; and a seat member having a seat portion on which the valve body is seated and having a fuel injection hole formed on a downstream side of the seat portion. The seat member is formed such that a gap between the seat member and the opposing valve body in the whole region on the downstream side of the fuel injection hole is smaller than a diameter of the fuel injection hole.

Abstract: In view of the foregoing issues, an object of the present invention is to provide a vehicle control device that reduces the constraints of heat generation and charging time of a booster circuit, and decreases favorably the fuel consumption and exhaust emission of an engine. A vehicle control device installed in a vehicle, the device includes: a battery; a high-voltage battery that has a voltage higher than a voltage of the battery; and a fuel injection device that injects fuel into an internal combustion engine, wherein the vehicle control device includes a control unit that determines whether to supply a drive current to the fuel injection device by the battery or supply a drive current to the fuel injection device by the high-voltage battery, and controls the fuel injection device.

Abstract: The purpose of the present invention is to provide a drive device that improves the precision of injection quantities by stabilizing the behavior of a valve body 214 under the condition that a valve body reaches a height position lower than a maximum height position and making the injection pulse width and the injection quantity gradient small.

Abstract: A spark-ignition direct fuel injection valve includes, at least, a seat member provided with a fuel injection hole and a valve seat and a valve body which controls fuel injection from the injection hole by contacting and separating from the valve seat. In the spark-ignition direct fuel injection valve: the injection hole has an injection hole inlet which is open inwardly of the seat member and an injection hole outlet which is open outwardly of the seat member; an opening edge of the injection hole inlet has a first round-chamfered portion formed on an upstream side with respect to a fuel flow toward the injection hole inlet; and an extending length (L) of the injection hole does not exceed three times a hole diameter (D) of the injection hole.

Abstract: Provided is an electromagnetic valve capable of stabilizing an injection amount even when injection is performed while an intermediate member continues to be displaced after valve closing and returns to a closed valve standby state. For that purpose, a valve body 303 opens or closes a flow path. A movable iron core 404 moves the valve body 303 in a valve opening direction using a magnetic attraction force. An intermediate member 414 forms a preliminary stroke gap (g1) between the movable iron core 404 and the valve body 303 in a closed valve state. A stopper portion 410c collides with the intermediate member 414 when the intermediate member 414 moves in a direction in which the preliminary stroke gap (g1) is reduced.

Abstract: The present invention is directed to achieving an appropriate L/D of each injection hole in a fuel injection device in which a plurality of injection holes is formed. To achieve the object, provided is a fuel injection device including a valve body and an injection hole forming portion in which a plurality of injection holes is formed on a more downstream side than a seat portion on which the valve body is seated, in which the injection hole forming portion is formed in a manner such that a valve body central axis and a central axis of the injection hole forming portion are horizontally deviated in a vertical cross-sectional surface passing through the valve body central axis.

Abstract: Recent exhaust gas regulation requires reduction of an amount and quantity of particulate matter included in an exhaust gas, and a normal maximum fuel pressure may be increased to approximately 35 MP. When the normal maximum fuel pressure is 35 MPa, a fuel injection valve is required to work for example at a pressure up to 45 MPa. In such a condition, a fluid force may exceed a valve opening force depending on a seat diameter, and a needle valve cannot be kept open and closed, when opening thereof is required.

Abstract: Provided is a fuel injection valve capable of stroking a valve body in large and small two stages and capable of precisely controlling an injection flow rate at the stroke. Therefore, the fuel injection valve of the present invention is provided with a valve body for opening or closing a flow path, a movable element for driving the valve body in a valve opening direction, and a magnetic core for attracting the movable element, in which the movable element is separately configured from the valve body, and is configured by a first movable element having a first facing surface facing the magnetic core and having the first facing surface attracted by the magnetic core, and a second movable element separately configured from the first movable element, having a second facing surface facing the magnetic core, and having the second facing surface attracted by the magnetic core.

Abstract: An object of the present invention is to provide a fuel injection valve configured to suppress bouncing of a valve element that is caused as a result of the valve element being rendered elastic when the valve element collides with a valve seat. The fuel injection valve of the present invention includes the valve element configured to come into contact with the valve seat for closing an injection hole and to separate from the valve seat for unclosing the injection hole, an elastic member urging the valve element toward the valve seat, a movable iron core disposed to be in and out of contact with the valve element, a fixed iron core disposed to be opposed to the movable iron core, and a coil configured to generate electromagnetic force for moving the movable iron core.

Abstract: Provided is a structure capable of reducing dribbling of fuel generated when a valve body is closed. In order to achieve the above object, a fuel injection device includes: a valve body; and a seat member having a seat portion on which the valve body is seated and having a fuel injection hole formed on a downstream side of the seat portion. The seat member is formed such that a gap between the seat member and the opposing valve body in the whole region on the downstream side of the fuel injection hole is smaller than a diameter of the fuel injection hole.