Abstract: A valve device includes a flow channel member having a first flow channel, an electromagnetic valve having a movable piece movable in a predetermined direction and being capable of opening and closing the first flow channel, and a valve seat body fixed to the first flow channel. The first flow channel has a first flow channel main body and an opening connected to one end of the first flow channel main body with a step therebetween. The valve seat body has a fixed part fitted into an inside of the opening, an extension which extends from the fixed part, a circulation hole which penetrates the fixed part and the extension, and a valve seat which is provided at an end of the circulation hole. The movable piece has a valve body which is able to be seated in the valve seat from one side in the predetermined direction.

Abstract: A valve device includes a flow channel member having a first flow channel, and an electromagnetic valve having a movable piece movable in a predetermined direction and being capable of opening and closing the first flow channel. The flow channel member has an annular protrusion surrounding an opening of the first flow channel. A valve body of the movable piece has a valve body base having a large diameter part and a small diameter part connected to the large diameter part with a step therebetween, and an annular elastic body surrounding the small diameter part and attached to the valve body base. The annular elastic body has a first contact surface contacting a surface of a flange of the small diameter part, a second contact surface contacting a step surface of the step, and a seal surface able to contact the annular protrusion.

Abstract: An electromagnetic valve includes a mover that is able to move in a predetermined direction. The mover includes a valve body part including a valve body base part and an annular elastic body. The valve body base part includes a large diameter part and a small diameter part connected via a step difference. The annular elastic body includes a first contact surface, a second contact surface in contact with a step difference surface in the step difference, and a sealing projecting part that is able to come into contact with a peripheral edge part of an opening part of a first flow path in the predetermined direction. The sealing projecting part surrounds the opening part when seen in the predetermined direction. The sealing projecting part, the second contact surface, and the step difference surface are at least partially superimposed on each other when seen in the predetermined direction.

Abstract: A motor control device includes: a voltage boosting circuit that boosts a power source voltage supplied from an outside; a condenser that smooths a voltage output by the voltage boosting circuit; an inverter circuit that generates a drive voltage of a motor by switching a voltage output by the voltage boosting circuit and smoothed by the condenser; and a control part that causes the voltage boosting circuit to bypass and causes the power source voltage to be supplied to the inverter circuit, and a distance between the voltage boosting circuit and the inverter circuit is a distance with which a parasitic inductance is equal to or less than a predetermined value.

Abstract: An electric actuator includes a motor including a rotor having a motor shaft extending along a central axis and a stator, a deceleration mechanism connected to the motor shaft, an output shaft, a first bearing, a second bearing, and a deceleration mechanism case. The first bearing is fitted on an eccentric axis part of the motor shaft. The deceleration mechanism includes an internal gear in a ring shape, an external gear connected to the eccentric axis part, and an output flange part which transmits rotation of the external gear around the central axis to the output shaft. The deceleration mechanism case includes a case body and a cup member. The cup member includes a first cylinder part to which the internal gear is fitted on the radial-direction inner side, and a second cylinder part to which the second bearing is fitted on the radial-direction inner side.

Abstract: In a recirculation valve, a first support target portion receives a biasing force of a biasing member on a first stepped surface and moves to one side in an axial direction, such that a first opening is blocked. The first support target portion moves to the other side in the axial direction against a biasing force of the biasing member due to a negative pressure on a downstream side with respect to an upstream side, such that the first opening opens.

Abstract: A motor, an inverter substrate electrically connected to the motor, a housing accommodating the motor and the inverter substrate, and a pump section driven by the motor are included. The inverter substrate is disposed on one side of the motor. The pump section is disposed on the other side of the motor. The housing has a motor housing section accommodating the motor, an inverter housing section accommodating the inverter substrate, and a breather section establishing communication between inside and outside of the housing. The motor housing section has an accommodation tubular section accommodating the motor and a brim section spreading outward in a radial direction from an end of the accommodation tubular section. The inverter housing section is disposed on one side of the brim section and overlaps the brim section when seen in the axial direction. The breather section is disposed at the brim section.

Abstract: An inverter substrate has a plurality of heat generating elements mounted thereon and disposed at intervals from each other. A housing has an inverter housing section that accommodates the inverter substrate. The inverter housing section has a first member that faces one plate surface of a pair of plate surfaces of the inverter substrate, a second member that faces the other plate surface of the pair of plate surfaces, and a plurality of heat conductive sheets that are disposed between the first member or the second member and the inverter substrate and are brought into contact with the first member or the second member and the inverter substrate. The heat conductive sheets are thermally connected to the heat generating elements. The heat conductive sheets are individually disposed at positions at which the heat conductive sheets overlap the plurality of heat generating elements in a plan view of the inverter substrate.

Abstract: A pressure control device reliably preventing foreign matter from flowing beyond a filter unit to the downstream side. The pressure control device includes a body and a cylindrical filter unit. The body has a flow path including a groove and a widened part. A depth of the groove from an upper surface to a bottom is a first depth. The widened part is connected to the groove, extends from the upper surface to the bottom, and has a width larger than a width of the groove. The filter unit is housed along a depth direction of the widened part to capture foreign matter mixed in a fluid passing through the flow path. A depth of the widened part from the upper surface to a bottom surface is a second depth larger than the first depth. The widened part includes a receiving part that a part of the filter unit enters.

Abstract: An electric oil pump includes a motor unit having a shaft centered on a central axis that extends in an axial direction of the shaft and a pump unit which is disposed on a front side of the motor unit, is driven by the motor unit, and discharges oil. The motor unit includes a rotor that is fixed on a rear side of the shaft, a stator that is disposed outside the rotor in a radial direction, a resin housing in which the rotor and the stator are housed, and a connector assembly that is disposed outside the resin housing in the radial direction. The connector assembly is integrally molded with the resin housing. The pump unit includes a pump rotor installed to the shaft that protrudes from the motor unit and a pump housing in which the pump rotor is housed.

Abstract: A solenoid device includes a yoke, a core, a shaft, a bobbin, a coil, a plunger, a lid, and a housing. A housing body part of the housing has a first opening that opens on the rear side; and a first inner wall part expanding in a cylindrical shape on the outer side in the radial direction on an inner wall on the rear side. The first inner wall part has a first step part at the end on the other side in the axial direction. A first cylindrical part of the yoke has a first flange part on the rear side. The first flange part has a hole penetrating in the axial direction. A second space, which communicates a second through hole with the hole when the plunger has moved to a retreat position, is provided between an inner surface of the lid and the plunger and the yoke.

Abstract: A solenoid valve includes a solenoid including a guide, a mover that moves in an axial direction radially inside the guide, a yoke made of a magnetic material and disposed on one axial side of the mover, a magnet on one axial side of the yoke, an elastic body that applies an elastic force to the mover in the direction away from the magnet, a cover made of a magnetic material, a pin which moves as the mover moves, and a valve that is opened and closed as the mover and the pin move. The cover includes a cylinder surrounding the radial outside of the solenoid, a first wall on the other axial side of the solenoid, and a second wall that covers one axial side of the magnet.

Abstract: A signal generator generates a control signal that causes an inverter to supply a drive current in an AC voltage waveform to each phase of a motor. The signal generator alternately repeats a first energization cycle in which only a switch on an upper side of an arm is set to an ON state and a second energization cycle in which only a switch on a lower side of the arm is set to the ON state in the AC voltage waveform having a third energization cycle therebetween, changes the switches on the upper side and the lower side of the arm to the ON state and an OFF state in order in the third energization cycle, continuously changes an output voltage of the switch that has been further changed to the ON state, and generates a control signal to cause waveforms of the preceding and succeeding first energization cycle and second energization cycle to be continuous with the third energization cycle by varying a phase of the first to the third energization cycles in each phase.

Abstract: The clutch control device comprises: a pump that feeds oil to a hydraulic clutch; a control part that controls the pump; an input-side oil channel through which oil suctioned into the pump from an oil tank passes; an output-side oil channel connecting the pump and the hydraulic clutch; a pressure sensor; a connecting oil channel connected to the input-side oil channel and the output-side oil channel; and a solenoid valve that interrupts or allows the flow of oil in the connecting oil channel. The opening degree of the valve can be adjusted. When a drive shaft and a driven shaft are connected by the hydraulic clutch, the control part adjusts the opening degree of the valve on the basis of the pressure of oil in the output-side oil channel and the number of rotations made by the driven shaft while monotonically increasing the number of rotations of the drive part.

Abstract: A recirculation valve includes a first supported portion that closes a first opening when a valve body biased by a biasing member is moved to one side in the axial direction, the first supported portion opens the first opening when the valve body moves to the other side in the axial direction against a biasing force of the biasing member due to a negative pressure on a downstream side with respect to that on an upstream side, the valve body includes a first hole extending from an end portion on the other side in the axial direction to one side in the axial direction, and a valve body barrel portion includes a second hole that extends from a radially outward side thereof and reaches the first hole.

Abstract: A control substrate capable of effectively reducing noise input to a plurality of MOSFETs is provided. The control substrate includes at least three parallel snubber circuits (132, 134, and 135). Each of the parallel snubber circuits (132, 133, and 134) is connected in parallel with each of U-phase MOSFETs (126a and 126b), V-phase MOSFETs (127a and 127b), and W-phase MOSFETs (128a and 128b).

Abstract: The clutch control device comprises: a pump that feeds oil to a hydraulic clutch; a control part that controls the pump; an input-side oil channel through which oil suctioned into the pump from an oil tank passes; an output-side oil channel connecting the pump and the hydraulic clutch; a pressure sensor; a connecting oil channel connected to the input-side oil channel and the output-side oil channel; and a solenoid valve that interrupts or allows the flow of oil in the connecting oil channel. The opening degree of the valve can be adjusted. When a drive shaft and a driven shaft are connected by the hydraulic clutch, the control part adjusts the opening degree of the valve on the basis of the pressure of oil in the output-side oil channel and the number of rotations made by the driven shaft while monotonically increasing the number of rotations of the drive part.

Abstract: A pressure detection apparatus includes a base plate including a first surface, a second surface, and an opening, a pressure sensor disposed on the first surface so as to cover the opening of the base plate and outputting an electric signal according to a pressure of measured fluid inside the opening, a lead terminal electrically connected to the pressure sensor, a housing holding the base plate and the lead terminal and including an exposed portion in which a portion of the lead terminal is exposed, and a capacitor protecting the pressure sensor. The housing includes a capacitor housing portion, the capacitor being electrically connected to the lead terminal inside the exposed portion, and a positioning portion that positions, inside the capacitor housing portion, the capacitor that has been mounted in the capacitor housing portion.

Abstract: A sensor attachment structure of an oil pressure sensor suitable for use as a control valve of an automobile transmission includes a sensor case inserted into an accommodation space 4 of a valve upper-body portion such that a body portion of the sensor case is capable of rotating about a vertical central axis. A stopper projects in a horizontal direction from the upper body, the stopper being movable vertically in a guide groove of the sensor case, and a rotatable relative to a restricting portion of the central case to restrict a vertical movement of the stopper to prevent the oil pressure sensor from falling off the upper body.

Abstract: A reflux valve includes a first supported portion that plugs a first opening when a valve body biased by a biasing member moves to one side in an axial direction, the first supported portion opens the first opening when the valve body moves to the other side in the axial direction against a biasing force of the biasing member due to negative pressure applied to a downstream side relative to an upstream side, the valve body includes a first hole extending from an end on the other side in the axial direction to one side in the axial direction, a valve body portion includes a second hole extending from an outer side in a radial direction and reaching the first hole, and the valve body portion includes a third hole at a different position from the second hole in the axial direction.