A fuel injection control device is adapted for a fuel injection system including an injector and a high-pressure pump that raises pressure of fuel and supplies the fuel to the injector. The fuel injection control device includes a selecting unit for selecting by which one of full lift injection and partial injection to inject fuel, and a pump control unit for controlling operation of the high-pressure pump such that a pressure of fuel supplied to the injector coincides with a target pressure. The selecting unit selects the partial injection when a required injection quantity of fuel is equal to or smaller than a partial maximum injection quantity. A fuel injection system includes the fuel injection control device, the injector, and the high-pressure pump.

A fuel injection valve includes: a valve member; an anchor configured to be relatively displaceable in a valve opening-and-closing direction with respect to the valve member; a fixed core; a first spring biasing the valve member in a valve closing direction; a second spring biasing the anchor in the valve opening direction from an opposite side of the fixed core; and a third spring biasing the anchor in the valve closing direction from the fixed core side and has a biasing force smaller than a biasing force of the first spring and larger than a biasing force of the second spring where engagement portions are provided in both the anchor and the valve member to be engaged with each other when the anchor is displaced in the valve opening direction with respect to the valve member, thereby regulating the displacement of the anchor in the valve opening direction.

In an electromagnetic fuel injection valve for in-cylinder injection, a fuel injection hole is an elongated hole having a major axis and a minor axis, the major axis being curved into an arc shape having a radius that is smaller than a radius of a pitch circle of an inlet of the fuel injection hole. Accordingly, the electromagnetic fuel injection valve can ensure a required flow rate even when a penetrating power is decreased.

A shot variation in injection quantity of a fuel injection device is reduced. A control device according to an aspect of the present invention performs a first current control for a solenoid by a first current waveform by applying a reverse voltage to the solenoid before a mover or a valve collides with a fixed portion, when an injection quantity of a fuel from opening to closing of the valve of the fuel injection device is a set value or more. In addition, the control device performs a second current control for the solenoid by a second current waveform so that a current larger than a holding current holding the mover or the valve in a state of being in contact with the fixed portion flows to the solenoid, until the mover or the valve collides with the fixed portion, when the injection quantity of the fuel from opening to closing of the valve is less than the set value.

A valve for metering a fluid is described, which is used, in particular, as a fuel injector for internal combustion engines, including an electromagnetic actuator and a valve needle actuatable by the actuator, an armature of the actuator being guided on valve needle, a stop element which limits a movement of the armature relative to the valve needle being situated on the valve needle, and the armature including a spring receptacle which is open toward the stop element and in which a spring supported on the stop element is inserted. The valve needle is guided via the armature and/or the stop element along a longitudinal axis of a housing. Furthermore, as viewed along the longitudinal axis, a length of the spring receptacle is smaller than a spring length of the spring in the non-actuated initial state.

A fuel injection valve includes: a coil; a stationary core to generate a magnetic force; a movable structure including a moving core and a valve body and internally having a movable flow passage; and a body that internally accommodates the movable structure and internally has a part of the flow passage. The movable structure includes a throttle portion at which a passage area of the movable flow passage is partially throttled. The flow passage includes a throttle flow passage defined by the throttle portion and a separate flow passage between the movable structure and the body. A passage area of the separate flow passage is smaller than a passage area of the throttle flow passage. A position of the separate flow passage in a direction perpendicular to a moving direction of the movable structure is different from an outermost peripheral position of the moving core.

An object of the present invention is to provide a fluid control device with an improved effect of suppressing blowhole generation. Therefore, a component for a flow rate control device of the present invention includes: a first component 140 (A); a second component 107 (B) fixed to the first component by a press-fitting portion 802; a butt-welded portion 803 connecting the first component and the second component; and a first gap 1001 and a second gap 1002 formed between mutually opposing surfaces of the first component and the second component. The first gap is provided on a side of the press-fitting portion with respect to the second gap between the press-fitting portion and the butt-welded portion, and is formed in a direction intersecting a press-fitting direction. The second gap is provided on a side of the butt-welded portion with respect to the first gap between the press-fitting portion and the welded portion, and is formed in a direction intersecting the first gap.

This invention refers to an optimized structure of a high flow fuel dosing valve applied to automobiles in general, particularly to high power racing cars with the purpose of opening and closing an orifice for fuel injection in internal combustion engines for power gain through an innovative and improved mechanical constructiveness of the coil body (1), coil (2), spring (3), needle (4), guide ring (5), lock (6), seat (7), sieve (8), needle body (9) and o-ring (10), with advantages of greater and faster fuel flow, durability, efficiency and power gain.

A fuel injection valve includes: a coil that is configured to generate a magnetic flux when the coil is energized; a stationary core that is configured to become a passage of the magnetic flux; a movable core that is configured to be attracted to the stationary core when the movable core becomes a passage of the magnetic flux; and a magnetic-flux limiting portion that is displaced from the stationary core in an axial direction while a degree of magnetism of the magnetic-flux limiting portion is lower than a degree of magnetism of the stationary core. A boundary between the stationary core and the magnetic-flux limiting portion is defined as a limiting boundary, and an imaginary extension line, which is formed by extending the limiting boundary toward the movable core, is defined as a boundary extension line. The limiting boundary is tilted relative to the axial direction.

This invention refers to an optimized structure of a high flow fuel dosing valve applied to automobiles in general, particularly to high power racing cars with the purpose of opening and closing an orifice for fuel injection in internal combustion engines for power gain through an innovative and improved mechanical constructiveness of the coil body (1), coil (2), spring (3), needle (4), guide ring (5), lock (6), seat (7), sieve (8), needle body (9) and o-ring (10), with advantages of greater and faster fuel flow, durability, efficiency and power gain.