Abstract: A rotor core is provided. The rotor core includes a first electromagnetic steel plate, and a second electromagnetic steel plate laminated in an axial direction of the rotor core alongside the first electromagnetic steel plate, where the second electromagnetic steel plate has a plurality of protrusion portions each extending toward a magnet to be fixed, and each of the protrusion portions has a tip portion extending toward an opposite side of the magnet.

Abstract: The present teachings provide a rotor. The rotor 10 may comprise: a shaft 12; a rotor core 20; a first end plate 50; and a second end plate 52. Rotor core 20 may comprise a first flow path 22a which allows the coolant to flow from the one side to the other side of the axial direction and a second flow path 22d which allows the coolant to flow from the other side to the one. First end plate 50 may comprise a first communication flow path 54a which allows the coolant to flow from shaft 12 to first flow path 22a. Second end plate 52 may comprise a second communication flow path 54d which allows the coolant to flow from shaft 12 to second flow path 22d.

Abstract: A rotor may include: a rotor shaft; a rotor core attached to the rotor shaft and comprising a plurality of magnet slots and magnets, wherein at least one magnet of the magnets has an elongated cross-sectional shape and is fixed by being pressed against a part of an inner surface defining a corresponding one of the magnet slots of the rotor core. The rotor is configured so that coolant flowing through the rotor shaft reaches a surface of a long side of the at least one magnet that is exposed inward in a radial direction of the rotor core in the corresponding magnet slot and moves along an axial direction of the rotor core.

Abstract: A motor may include: a stator with a coil; and a rotor radially inside the stator, wherein the rotor includes a rotor shaft, a core supported rotatably with the shaft, and a first end plate attached to a first end of the core, the core including a magnet held in the core, a magnet slot that holds a magnet, and a coolant path extending along an axial direction of the core, the coolant path disposed between a radially-inner end surface of the magnet and the magnet slot, and the first end plate including a flange radially outside the radially-inner end surface of the magnet, the flange protruding toward the core along the axial direction of the core, and the flange being configured to form a cavity between the first end plate and the first end, wherein the cavity delivers the coolant supplied from the rotor shaft to the coolant path.

Abstract: An electric motor disclosed herein may include a stator, a supply hole, a first flow passage, and second flow passages. The first flow passage and the second flow passages may be provided in the stator. The first flow passage may extend along a circumferential direction of the stator. The second flow passages may extend along an axis of the stator and cross the first flow passage. A plurality of guides may be provided in the first flow passage to disturb a flow of refrigerant. The refrigerant is supplied from the supply hole to the first flow passage and disturbed by the guides. A part of the refrigerant of which flow is disturbed flows into the second flow passages. The refrigerant is distributed, thus, the refrigerant flows evenly into the second flow passages. The entire stator is thus effectively cooled.

Abstract: An electric motor disclosed herein may comprise a rotor core fixed to a shaft, a stator, and first and second refrigerant passages. The stator may include coil ends at both ends. The first refrigerant passage may be provided in the shaft and arranged outside the rotor core in an axial direction of the shaft. The second refrigerant passage may extend inside the rotor core. A first outlet of the first refrigerant passage may be provided on the shaft, and an ejecting direction of refrigerant at the first outlet may be directed towards one of the coil ends. The rotor core is cooled by the refrigerant flowing in the second refrigerant passage. The coil ends are cooled by the refrigerant flowing in the first refrigerant passage, that is, the refrigerant that has not cooled the rotor.

Abstract: A drive unit for a vehicle may include a motor, a casing accommodating the motor, an electric pump unit attached to a lower part of the casing and configured to circulate heat medium within the casing and a filter unit attached to the lower part of the casing and configured to filter the heat medium. At least a part of the electric pump unit and at least a part of the filter unit each protrude outside the casing. Outside the casing, the filter unit is adjacent to the electric pump unit from a front in the vehicle.

Abstract: An automatic transmission includes: a multi-disc brake including first and second friction engagement elements which are alternately arranged in an axial direction, and a tube that supplies lubricating oil to the first friction engagement element and the second friction engagement element in a transmission case. Further, the tube has injection holes that inject the lubricating oil toward a spline groove, which is fitted with spline teeth of the first friction engagement element on an inner peripheral surface of the transmission case, and the injection holes open toward a gap, which is formed between the spline groove and the spline teeth, and inject the lubricating oil to cause the lubricating oil to contact a surface of the spline groove located above the spline teeth.

Abstract: An automatic transmission includes: a frictional engagement element including first and second annular friction plates; a pressing member moving in the axial direction relative to the transmission case and press the frictional engagement element in the axial direction; and a lubricating oil. Further, the transmission case includes a contact portion on the inner wall so that the contact portion is separated from a back surface of the pressing member when the frictional engagement element is in an engagement state and comes into contact with the back surface of the pressing member when the frictional engagement element is in a disengagement state.

Abstract: An automatic transmission includes a main transmission and an auxiliary transmission. The auxiliary transmission includes an auxiliary-transmission-side planetary gear mechanism, a first clutch, and a second clutch. The auxiliary-transmission-side planetary gear mechanism is provided between a pair of main-transmission-side planetary gear mechanisms, and a part of the auxiliary-transmission-side planetary gear mechanism is located within the main transmission. The first clutch fixes rotation of a sun gear of the auxiliary-transmission-side planetary gear mechanism. The second clutch connects a ring gear of the auxiliary-transmission-side planetary gear mechanism with the sun gear.

Abstract: An automatic transmission includes: a main transmission including a plurality of main transmission side planetary gear mechanisms; an auxiliary transmission having a rotation axis different from a rotation axis of the main transmission; and a low/high switching mechanism switching between a low mode and a high mode by engaging and disengaging an engaging device provided on the auxiliary transmission. Further, the low/high switching mechanism switches between the low mode and the high mode at a point where a gear ratio in the low mode coincides with a gear ratio in the high mode.

Abstract: An automatic transmission includes: a multi-disc brake including first and second friction engagement elements which are alternately arranged in an axial direction, and a tube that supplies lubricating oil to the first friction engagement element and the second friction engagement element in a transmission case. Further, the tube has injection holes that inject the lubricating oil toward a spline groove, which is fitted with spline teeth of the first friction engagement element on an inner peripheral surface of the transmission case, and the injection holes open toward a gap, which is formed between the spline groove and the spline teeth, and inject the lubricating oil to cause the lubricating oil to contact a surface of the spline groove located above the spline teeth.

Abstract: A hybrid vehicle includes: an engine including an output shaft configured to output a power; a damper placed on a first axis that is the same axis as the output shaft; a rotating machine placed on the first axis; a torque converter placed on the first axis; a transmission mechanism placed so that an input shaft of the transmission mechanism is positioned on a second axis that is an axis different from the first axis; a case in which the rotating machine and the transmission mechanism are accommodated; driving wheels attached to drive shafts; and an oil accumulated in a lower part of a space surrounded by the case and used for lubrication of the transmission mechanism, the oil being in contact with a part of the rotating machine.

Abstract: An automatic transmission includes: a frictional engagement element including first and second annular friction plates; a pressing member moving in the axial direction relative to the transmission case and press the frictional engagement element in the axial direction; and a lubricating oil. Further, the transmission case includes a contact portion on the inner wall so that the contact portion is separated from a back surface of the pressing member when the frictional engagement element is in an engagement state and comes into contact with the back surface of the pressing member when the frictional engagement element is in a disengagement state.

Abstract: The hydraulic control device includes: a mechanical variable-capacity oil pump; and an electronic control unit configured to calculate a target discharge volume of the mechanical variable-capacity oil pump using a plurality of parameters of the transmission, and control the mechanical variable-capacity oil pump based on the target discharge volume.

Abstract: An automatic transmission includes: a main transmission including a plurality of main transmission side planetary gear mechanisms; an auxiliary transmission having a rotation axis different from a rotation axis of the main transmission; and a low/high switching mechanism switching between a low mode and a high mode by engaging and disengaging an engaging device provided on the auxiliary transmission. Further, the low/high switching mechanism switches between the low mode and the high mode at a point where a gear ratio in the low mode coincides with a gear ratio in the high mode.

Abstract: An automatic transmission includes a main transmission and an auxiliary transmission. The auxiliary transmission includes an auxiliary-transmission-side planetary gear mechanism, a first clutch, and a second clutch. The auxiliary-transmission-side planetary gear mechanism is provided between a pair of main-transmission-side planetary gear mechanisms, and a part of the auxiliary-transmission-side planetary gear mechanism is located within the main transmission. The first clutch fixes rotation of a sun gear of the auxiliary-transmission-side planetary gear mechanism. The second clutch connects a ring gear of the auxiliary-transmission-side planetary gear mechanism with the sun gear.

Abstract: A hybrid vehicle includes: an engine including an output shaft configured to output a power; a damper placed on a first axis that is the same axis as the output shaft; a rotating machine placed on the first axis; a torque converter placed on the first axis; a transmission mechanism placed so that an input shaft of the transmission mechanism is positioned on a second axis that is an axis different from the first axis; a case in which the rotating machine and the transmission mechanism are accommodated; driving wheels attached to drive shafts; and an oil accumulated in a lower part of a space surrounded by the case and used for lubrication of the transmission mechanism, the oil being in contact with a part of the rotating machine.

Abstract: The hydraulic control device includes: a mechanical variable-capacity oil pump; and an electronic control unit configured to calculate a target discharge volume of the mechanical variable-capacity oil pump using a plurality of parameters of the transmission, and control the mechanical variable-capacity oil pump based on the target discharge volume.

Abstract: A vehicle drive control device performs acceleration/deceleration running by alternately repeating acceleration running and deceleration running, wherein it compares between an efficiency of the motor at a first operation point determined by a rotation speed and a torque of a motor and an efficiency of the motor at a second operation point for outputting a higher torque than the first operation point, and if a difference between the efficiencies is greater than a determination value, the acceleration running at the second operation point and the deceleration running being repeated, the second operation point being set a maximum efficiency line of the motor with the rotation speed and the torque of the motor as parameters to perform the acceleration running, and if acceleration during the acceleration running becomes larger than an acceleration limit value, a rotating machine acting at least as an electric generator generating electricity to charge a battery.