摘要:
A motor-driven fuel pump including a brushless motor; a motor housing for enclosing the brushless motor; and a pump section adapted to be driven by the brushless motor for sucking a fuel and pumping the same into the motor housing. The brushless motor includes a stator fixed to an inner circumference of the motor housing; a rotor assembly adapted to be rotated by supplying current to the stator, which rotor assembly includes a motor shaft, a rotor mounted to the motor shaft a rotor cover mounted to one end of the rotor magnet on the side of the pump section, a timing rotor mounted to the other end of the rotor magnet, and a sensor magnet mounted to an end of the timing rotor on the side opposite to the rotor magnet; an end cover mounted at an inlet end of the brushless motor; a motor shaft bearing mounted in the end cover for rotatably supporting the motor shaft; and a timing rotor bearing interposed between an outer circumference of the timing rotor and the inner circumference of the motor housing for rotatably supporting the timing rotor.
摘要:
A fuel pump including a housing; a motor section provided in the housing which motor section includes an armature and a magnet opposed to the armature with a substantially annular space defined therebetween as a fuel passage, which armature includes a core formed by stacking a plurality of plates and a coil wound around the core; a pump section fixed to a lower end of the housing and connected to the motor section to be driven thereby; a fuel inlet formed in the pump section for sucking a fuel by driving the motor section; a fuel outlet formed at an upper end of the fuel pump for discharging the fuel fed from the fuel inlet through the fuel passage; and a first resin portion impregnated in the core and the coil for suppressing vibration of the armature. The fuel pump having the above construction preferably further includes a second resin portion coated on a surface of at least the first resin portion, which second resin portion has a resistance against the fuel and no influence upon the fuel.
摘要:
A multi-stage motor-driven fuel pump including a motor section provided with an electric motor and a pump section to be driven by the electric motor, the pump section having a plurality of pump chambers partitioned by intermediate plates and communicated with each other by a fuel communication hole formed through each of the intermediate plates. A ratio of a sectional area of the fuel communication hole of any one of the intermediate plates between adjacent ones of the pump chambers to a sectional area of the pump chamber on a lower pressure side is set in a predetermined range such that a gradient of fuel pressure increase in the pump section is increased to early prevent vapor lock.
摘要:
Method and apparatus for pressing a sheet blank into a tubular container, including a first process or device for drawing the blank into an intermediate workpiece having a tubular portion and a bottom portion closing one end of the tubular portion, and a second process or device for ironing the tubular portion in the axial direction. The second process includes a forward ironing step for placing the workpiece on a first ironing punch and forcing the workpiece and first punch together into a first die hole, to iron the tubular portion in an axial direction from the above one end toward the other end, and a backward ironing step for placing the workpiece on a columnar second ironing punch and forcing the workpiece and second punch together into a second die hole, with a columnar pushing punch held in pressing contact with the outer surface of the bottom portion of the workpiece, to iron the tubular portion in the direction opposite to that in the forward ironing step.
摘要:
A forging method for making a forged product from an elongate steel bar material. The forging comprises a heating step in which the elongate bar material is heated, a cutting step in which the heated bar material is cut into billet materials each having a predetermined length, and a forging step in which the billet materials are successively forged. In this forging method, when an abnormality arises in the forging step, the cutting in the cutting step is interrupted and the bar material in the heating step is maintained in the heating step without being transferred toward the cutting step. Additionally, unless the abnormality is normalized within a predetermined limit time, the cutting in the cutting step is restarted and the billet materials formed after the restarting of the cutting are transferred to a storing apparatus which is outside of a normal forging line.
摘要:
Three embodiments of a regenerative pump: the first embodiment is composed of a body and casing separated by an intermediate ring-like spacer having a central annular area the wall of which forms the outer peripheral boundary of a radially defined chamber through which move the vanes of an impeller rotatably mounted in the center of the spacer. Inlet and outlet ports are placed in fluid communication with each other by virtue of the chamber as the impeller rotates. Concentric and overlapping grooves formed on the upper surface of the body and the lower surface of the case have a particular geometry the arrangement of which leads to a substantial reduction in noise contributed by fluid flowing in the region of the outlet port. In a second embodiment of the invention, the downstream portion of each of the grooves extends along a gentle curved line which terminates substantially without deflection in the outlet hole. The third embodiment comprises a multi-stage pump in which the intermediate spacer is formed with an inclined surface adopted to form a smooth fluid connection with the vanes of the second or upper impeller. At the same time, at the position corresponding to the location of the communication hole of the second spacer, is formed with an inclined surface which is substantially parallel to inclined surface formed on the intermediate spacer.
摘要:
A turbocharger includes: a turbine wheel that is driven by exhaust gas from an engine and supported rotatably by a predetermined rotary shaft; and a turbine housing that forms an exhaust gas passage that leads the exhaust gas to the turbine wheel, wherein the turbine housing includes a housing main body constituted by a plate-form member and a reinforcement member that forms the exhaust gas passage together with the housing main body and reinforces the housing main body, the reinforcement member includes a pair of annular portions having a substantially annular shape and provided about an axial center of the rotary shaft at an interval in an axial direction of the rotary shaft, and a connecting portion that connects the pair of annular portions, and the pair of annular portions and the connecting portion are molded integrally by implementing deformation processing on the plate-form member.
摘要:
A turbocharger includes: a turbine wheel that is driven by exhaust gas from an engine and supported rotatably by a predetermined rotary shaft; and a turbine housing that forms an exhaust gas passage that leads the exhaust gas to the turbine wheel, wherein the turbine housing includes a housing main body constituted by a plate-form member and a reinforcement member that forms the exhaust gas passage together with the housing main body and reinforces the housing main body, the reinforcement member includes a pair of annular portions having a substantially annular shape and provided about an axial center of the rotary shaft at an interval in an axial direction of the rotary shaft, and a connecting portion that connects the pair of annular portions, and the pair of annular portions and the connecting portion are molded integrally by implementing deformation processing on the plate-form member.