Patent application number | Description | Published |
20090064972 | FUEL INJECTION NOZZLE AND METHOD OF HOLDING THE SAME - A fuel injection nozzle for directly injecting fuel into a cylinder of an internal combustion engine is inserted in a connecting pipe extending from a fuel rail and is fixed to the connecting pipe by fastening member. The fuel injection nozzle has a sealing part for sealing a fuel passage to prevent fuel leakage, and a contact part in contact with the fastening member. The contact part is softer than the fastening member, and the contact part undergoes plastic deformation when a bending moment that bends the axis of the fuel injection nozzle acts on the fuel injection nozzle. | 03-12-2009 |
20100051727 | Multihole Injector - Each of the injection holes has an inclined angle with respect to a center line of an injection valve main body as well as the inclined angle of each of the injection holes is provided with a predetermined offset amount with respect to a target inclination angle of a center of gravity position of each of the injected fuel sprays. The predetermined offset amount is set based on a correction amount for correcting positional drift with respect to the target direction of the center of gravity position of the fuel spray. | 03-04-2010 |
20100320293 | Fuel Injector - A fuel injector is disclosed that has plural nozzle holes with the same cross-sectional shape and can individually set the flow rate of each nozzle hole. The fuel injector includes the plural nozzle holes, a seat section positioned upstream of the nozzle holes, a valve element that closes a valve when brought into contact with the seat section and opens the valve when separated from the seat section, and a circular cone tapered from an upstream end to a downstream end and provided with the seat section and an inlet opening of the nozzle holes. The plural nozzle holes have an identical shape and a shape of a cross-section of each of the nozzle holes is substantially out-of-round, the cross-section being perpendicular to a central axis of each of the nozzle holes. The cross-section of each of the nozzle holes is rotated around the central axis of each of the nozzle holes. A rotation angle of the cross-section is set in such a manner that a relationship between a conical surface of the circular cone and the rotation angle is different among at least two of the nozzle holes. | 12-23-2010 |
20110042491 | Fuel Injection Valve - An injector used for an internal combustion engine, wherein force acting on a valve element due to flow of fuel is reduced. The shape of either a valve element front end or a valve seat surface of a fuel injection valve is adapted such that the distance between the valve element front end and the valve seat surface which is formed by a circular conical surface is greater than in the case when the shape from a valve element circular tube surface to a spherical surface which forms a seat is connected by a circular arc. As a result, the cross-sectional area of a flow path is rapidly increased from the valve seat surface, on the outer side of the valve element, and this reduces that portion of the valve element which receives pressure due to a reduction in static pressure, reducing force acting on the valve element. | 02-24-2011 |
20110073682 | Fuel Injection Valve - A fuel injection valve comprises a valve return spring as a coil spring that applies a spring force to a movable valve element toward a valve seat and an adjuster that is used for adjusting a spring force by adjusting the amount of spring compression. The injection valve is provided with parts supporting respectively both ends of the spring in the axial direction, and the parts rotatable in the circumferential direction of the spring. | 03-31-2011 |
20110155103 | Fuel Injection Valve for Internal Combustion Engine - In a fuel injection valve, it is intended to enhance valve-closing responsivity while maintaining durability (anti wear property) of a collision portion between a stationary core and a movable core and valve-opening responsivity. | 06-30-2011 |
20120180754 | Electromagnetic Fuel Injection Valve and Internal Combustion Engine Control Device Using the Same - Disclosed is an electromagnetic fuel injection valve capable of reducing dynamic flow variation relative to the pulse widths of individual units in a lower pulse region than under idling conditions under which the dynamic flow is adjusted. Also disclosed is an internal combustion engine control device that utilizes the electromagnetic fuel injection valve. The electromagnetic fuel injection valve includes a fixed core, a coil disposed at the periphery of the fixed core, an anchor facing the lower end of the fixed core, a movable element with a valve seat formed on its lower end, and a regulator press-fit into a through-hole in the fixed core, the fixed core being a central shaft of the electromagnetic fuel injection valve. | 07-19-2012 |
20120227709 | Fuel Injection Device - In a fuel injection device, a driving unit structure has a magnetic aperture, in which an inner diameter is gradually enlarged toward the mover side, provided in an inner peripheral surface of the magnetic core. It is possible to reduce magnetic delay time upon valve opening from the supply of the electric current to the coil to the rise of magnetic flux and magnetic delay time upon valve closing from the stoppage of the electric current to the coil to reduction of magnetic flux, by providing a magnetic aperture in the inner peripheral surface of the magnetic core. Thus it is possible to improve the dynamic responsiveness upon valve opening and valve closing. | 09-13-2012 |
20130087639 | Electromagnetic Fuel Injection Valve - An electromagnetic fuel injection valve includes: a valve element which closes a fuel passage by coming into contact with a valve seat and opens the fuel passage by going away from the valve seat; an electromagnet which includes a coil and a magnetic core formed as a drive portion for driving the valve element; a movable element which is held by the valve element in a state where the movable element is displaceable in the direction of a drive force of the valve element relative to the valve element; a first biasing portion for biasing the valve element in the direction opposite to the direction of a drive force generated by the drive portion; a second biasing portion for biasing the movable element in the direction of the drive force with a biasing force smaller than the biasing force generated by the first biasing portion; and a restricting portion for restricting the displacement of the movable element in the direction of the drive force relative to the valve element. | 04-11-2013 |