CENTRIFUGAL COMPRESSOR

This centrifugal compressor comprises: a disc wheel having a body portion including front and rear surfaces oriented towards the opposite sides of each other in an axial direction, and a side surface connected to the front and rear surfaces; a first wall part facing the front surface and including a first wall surface that together with the front surface forms a flow channel through which a working fluid flows; a second wall part facing the rear surface and including a second wall surface that together with the rear surface forms a first gap; and a protruding wall part provided farther toward the diametrally outer side than the side surface of the disc wheel, so as to protrude from the second wall surface toward the first wall surface; the protruding wall part including a third wall surface extending axially from the second wall surface and facing the side surface of the disc wheel, the third wall surface extending farther axially toward the first wall surface than a part where the front ...

SPRING WASHER, VARIABLE FLOW RATE VALVE MECHANISM, AND TURBOCHARGER

This spring washer is formed in an annular shape about an axis, and comprises: a support section including a seating surface formed along a plane perpendicular to the axis, and an open surface on a side opposite the seating surface; a deformation section connected to a radial end section or a circumferential end section of the support section and extending so as to be inclined with respect to the plane; and a protruding section provided to at least one of the support section and the deformation section, and protruding in the thickness direction of the support section or the deformation section.

SUPERCHARGER

This supercharger comprises an operation mechanism for operating a valve body of a wastegate valve by swinging an operation lever. The operation mechanism includes: a reciprocating rod of an electric actuator; a joint member that is fastened to the rod with a nut and reciprocates together with the rod; and a link plate that is coupled to the joint member via a first hinge part which has a center of rotation reciprocating on a predetermined virtual straight line in conjunction with the reciprocating of the joint member, the link plate being coupled to the operation lever via a second hinge part, wherein the distance between the swing center of the operation lever and the center of rotation of the second hinge part is shorter than the distance between the swing center and the virtual straight line.

Electronic device, and capacitor capacitance detection method applied to the same

According to one embodiment, an electronic device includes a capacitor, a power supply device, a discharger and a capacitance detector. The capacitor is used as a backup power supply. The power supply device charges the capacitor. The discharger discharges the capacitor. The capacitance detector maintains a terminal voltage of the capacitor at a given level for a predetermined time, by controlling an operating time of the power supply device. The capacitance detector allows the discharger to start the discharge the predetermined time later. The capacitance detector detects a capacitance of the capacitor based on a transient response characteristic of the discharge.

Electronic device, and capacitor capacitance detection method applied to the same

According to one embodiment, an electronic device includes a capacitor, a power supply device, a discharger and a capacitance detector. The capacitor is used as a backup power supply. The power supply device charges the capacitor. The discharger discharges the capacitor. The capacitance detector maintains a terminal voltage of the capacitor at a given level for a predetermined time, by controlling an operating time of the power supply device. The capacitance detector allows the discharger to start the discharge the predetermined time later. The capacitance detector detects a capacitance of the capacitor based on a transient response characteristic of the discharge.

TURBINE HOUSING AND TURBOCHARGER

A turbine housing includes a scroll passage provided with a housing tongue. A groove portion (a notch) is formed in a wall surface on the scroll passage side of the housing tongue. The groove portion is located at a position close to an edge portion on the flange side of the wall surface. The groove portion extends from a tip end side of the housing tongue in an extending direction of the scroll passage. In a cross section orthogonal to the extending direction of the scroll passage, a curvature radius of the deepest part of the groove portion is smaller than a minimum curvature radius of the wall surface of the housing tongue. 1. A turbine housing of a turbocharger to be attached to a bearing housing thereof , comprises:an wheel housing unit configured to house a turbine wheel;a flange including an opening to allow insertion of the turbine wheel into the wheel housing unit; anda scroll passage formed along an outer periphery of the wheel housing unit, and provided with a roll-start portion communicating with a gas introduction passage for introducing a gas into the wheel housing unit, and a roll-end portion communicating with the wheel housing unit, whereinthe scroll passage includes a housing tongue formed along the outer periphery of the wheel housing unit in such a manner as to provide a partition between the roll-end portion and the gas introduction passage,the housing tongue has a thickness which is gradually reduced toward its tip end side, and includes a groove portion formed in a wall surface on the scroll passage side and extending from the tip end side in an extending direction of the scroll passage, andthe groove portion is located at a position close to an edge portion of the flange.2. The turbine housing according to claim 1 , whereinin a cross section intersecting the housing tongue and being orthogonal to the extending direction of the scroll passage, a curvature radius of the deepest part of the groove portion is smaller than a minimum curvature ...

VARIABLE FLOW VALVE MECHANISM AND VEHICLE TURBOCHARGER

In a waste gate valve, a coil spring being expandable and contractible in the axial direction of a valve shaft is provided between a washer and an attachment tongue in an axial direction of a valve shaft of a valve. The coil spring is made of a heat-resistant alloy or a ceramic. An annular guard wall is formed on a front surface of the attachment tongue by counter boring in such a way as to surround the coil spring. 1. A variable flow valve mechanism used in a turbocharger in which a gas passage to achieve a variable flow rate of an exhaust gas to be supplied to a turbine impeller side is formed inside a turbine housing or inside a connection body connected to the turbine housing in a communicating state , the variable flow valve mechanism configured to open and close an opening of the gas passage , the variable flow valve mechanism comprising:a stem rotatably supported by a support hole penetrating through an outer wall of the turbine housing or the connection body, the stem including a base end portion projecting to outside of the turbine housing or the connection body;a link member integrally provided at the base end portion of the stem and configured to be driven by an actuator to swing in forward and reverse directions around a center axis of the stem;an attachment member integrally provided at the stem and including an attachment hole penetrating through the attachment member; a valve body capable of coming into contact with and separating from a valve seat on the opening side of the bypass passage, and', 'a valve shaft integrally formed at the center of the valve body and fitted into the attachment hole in the attachment member;, 'a valve provided fitted into the attachment hole in the attachment member, allowed to have backlash on the attachment member, the valve including'}a clasp integrally provided at a tip end portion of the valve shaft and configured to prevent the valve from being separated from the attachment member; anda coil spring provided to at ...

MEMORY SYSTEM AND CONTROL METHOD OF MEMORY SYSTEM

A memory system includes a host interface, a nonvolatile memory, a power supply circuit, a protection circuit, and a first voltage monitor circuit. The power supply circuit is between the host interface and the nonvolatile memory, and supplies primary power to the nonvolatile memory. The protection circuit is between the host interface and the power supply circuit, and configured to clamp a power supply signal supplied from the host interface to the power supply circuit to a first voltage. The first voltage monitor circuit is between the host interface and the protection circuit, and configured to monitor a voltage level of the power supply signal supplied from the host interface and cause the voltage level of the power supply signal supplied to the power supply circuit to be decreased from the first voltage to a second voltage when the monitored voltage level is below a first threshold voltage. 1. A memory system comprising:a host interface;a nonvolatile memory;a power supply circuit that is arranged between the host interface and the nonvolatile memory, and supplies primary power to the nonvolatile memory;a protection circuit that is arranged between the host interface and the power supply circuit, and configured to clamp a power supply signal supplied through the host interface to the power supply circuit to a first voltage; anda first voltage monitor circuit that is arranged between the host interface and the protection circuit, and configured to monitor a voltage level of the power supply signal supplied through the host interface and to cause the voltage level of the power supply signal supplied to the power supply circuit to be decreased from the first voltage to a second voltage when the monitored voltage level is below a first threshold voltage.2. The memory system according to claim 1 , further comprising:an auxiliary power supply circuit; anda second voltage monitor circuit that is arranged between the protection circuit and the auxiliary power supply ...

Cold and hot forging method

Ceramicssmetal combinations

Method of burning ceramic structure

Toaster

Electronic device, and capacitor capacitance detection method applied to the same

According to one embodiment, an electronic device includes a capacitor, a power supply device, a discharger and a capacitance detector. The capacitor is used as a backup power supply. The power supply device charges the capacitor. The discharger discharges the capacitor. The capacitance detector maintains a terminal voltage of the capacitor at a given level for a predetermined time, by controlling an operating time of the power supply device. The capacitance detector allows the discharger to start the discharge the predetermined time later. The capacitance detector detects a capacitance of the capacitor based on a transient response characteristic of the discharge.