Abstract: The electric tractor is equipped with a battery, a transmission unit, a machine body frame, a rear axle unit, and a front axle unit. The transmission unit shifts the input power and outputs the shifted input power. The machine body frame is fixed to the transmission unit. The rear axle unit supports the rear wheels, and transmits, to the rear wheels, the power output from the transmission unit. The front axle unit supports the front wheels. The rear axle unit and the front axle unit support chassis including the machine body frame and transmission unit. The battery is supported by the chassis.

Abstract: A hybrid vehicle includes an engine, a first motor generator, a first clutch, a second clutch, a second motor generator, a power storage device, and an electronic control unit configured to control the engine, the first motor generator, the second motor generator, the first clutch, and the second clutch. The electronic control unit is configured to engage the first clutch and disengage the second clutch such that the first motor generator generates power using power from the engine and the hybrid vehicle runs using power from the second motor generator, when a vehicle speed is equal to or lower than a predetermined vehicle speed.

Abstract: A hybrid vehicle includes an engine, a first motor generator, a first clutch, a second clutch, a second motor generator, a power storage device, and an electronic control unit configured to control the engine, the first motor generator, the second motor generator, the first clutch, and the second clutch. The electronic control unit is configured to engage the first clutch and disengage the second clutch such that the first motor generator generates power using power from the engine and the hybrid vehicle runs using power from the second motor generator, when a vehicle speed is equal to or lower than a predetermined vehicle speed.

Abstract: A rotor includes: a shaft provided with a flange which projects outward in a radial direction from an outer peripheral surface of the shaft; and a rotor core formed by laminating a plurality of electromagnetic steel sheets, the rotor core being fitted on the outer peripheral surface of the shaft such that an axial-direction end surface of the rotor core is in contact with the flange. An annular recessed portion is formed on the outer peripheral surface of the shaft at a portion adjacent to a surface of the flange on a side of the rotor core, and two or more of the electromagnetic steel sheets positioned above the annular recessed portion and other electromagnetic steel sheets are joined to each other so as to form an integral body.

Abstract: A cooling structure for a rotary electric machine includes a first supply pipe that is disposed vertically above a rotary electric machine and that has a discharge hole through which a refrigerant is discharged toward the rotary electric machine; a second supply pipe that is disposed in parallel with the first supply pipe vertically above the rotary electric machine and that has a discharge hole through which the refrigerant is discharged toward the rotary electric machine; and a pump configured to deliver the refrigerant to the first supply pipe and the second supply pipe such that a direction of the refrigerant flowing through the first supply pipe and a direction of the refrigerant flowing through the second supply pipe are opposite to each other.

Abstract: A stator of a rotating electric machine includes a stator core, a plurality of insulators and a plurality of concentrated winding coils. The stator core includes an annular yoke and a plurality of teeth. The insulators are located along outer peripheral wall surfaces of the teeth. Each of the insulators includes a plurality of first surfaces and a plurality of second surfaces. The second surfaces connect the first surfaces. The coils are fitted on the teeth on which the insulators have been placed from a radially inner side thereof. The first surfaces of each of the insulators are in contact with inner peripheral surfaces of the coil that is placed on the outer periphery of the insulator.

Abstract: A cooling structure for a rotary electric machine includes a first supply pipe that is disposed vertically above a rotary electric machine and that has a discharge hole through which a refrigerant is discharged toward the rotary electric machine; a second supply pipe that is disposed in parallel with the first supply pipe vertically above the rotary electric machine and that has a discharge hole through which the refrigerant is discharged toward the rotary electric machine; and a pump configured to deliver the refrigerant to the first supply pipe and the second supply pipe such that a direction of the refrigerant flowing through the first supply pipe and a direction of the refrigerant flowing through the second supply pipe are opposite to each other.

Abstract: A rotor includes: a shaft provided with a flange which projects outward in a radial direction from an outer peripheral surface of the shaft; and a rotor core formed by laminating a plurality of electromagnetic steel sheets, the rotor core being fitted on the outer peripheral surface of the shaft such that an axial-direction end surface of the rotor core is in contact with the flange. An annular recessed portion is formed on the outer peripheral surface of the shaft at a portion adjacent to a surface of the flange on a side of the rotor core, and two or more of the electromagnetic steel sheets positioned above the annular recessed portion and other electromagnetic steel sheets are joined to each other so as to form an integral body.

Abstract: A hybrid vehicle is equipped with an engine that is connected to a power split mechanism, a generator, an electric motor, and also a stepped transmission that is arranged between the electric motor and a drive shaft. An electronic control unit (an ECU) with which this hybrid vehicle is equipped revises a down line downward to make a downshift likely to occur when at least one of a prescribed generator condition and a prescribed electric motor condition is fulfilled. The generator condition includes that the temperature of the generator is equal to or higher than a first reference temperature and that an absolute value of a rotational speed of the generator decreases due to the making of the downshift. The electric motor condition includes that the temperature of the electric motor is equal to or higher than a third reference temperature.

Abstract: A stator includes a stator core, an insulating body, a coil, and a resin-molded product. The stator core includes a circumferentially side surface and an axially upper surface. The insulating body includes a side wall and an upper wall. The side wall covers the circumferentially side surface of the stator core. The upper wall covers the axially upper surface of the stator core. A radially inner side end surface of the upper wall is positioned farther toward a radially outer side than a radially inner side end surface of the side wall. The resin-molded product covers the coil.

Abstract: An electric powered vehicle includes: a motor; an inverter configured to convert electric power from a battery to drive the motor; a transmission configured to shift the rotation output of the motor at a variable transmission gear ratio; and a controller configured to control the inverter to control the driving of the motor and to control a change in the shift gear stage, and to perform high surge region avoidance control for changing the gear ratio of the transmission to change a motor rotation speed while maintaining a vehicle speed and changing an operation point outside a high surge region, when the operation point of the motor enters the high surge region where the inverter is controlled by a PWM overmodulation control system, and the high surge region is defined to be equal to or higher than a predetermined rotation speed and equal to or less than predetermined torque.

Abstract: A cooling structure of a rotary electric machine (10) that includes a rotating shaft (16), a rotor (18), and a stator (20) that includes a coil end (22), includes a coolant passage (38) that is included in the rotating shaft (16) and through which coolant flows, and a squirt hole (42) that is included in the coolant passage (38). The squirt hole (42) is included in the coolant passage (38). An opening portion of the squirt hole (42) is positioned on an outer peripheral surface of the rotating shaft (16) and to an outside of the coil end (22) in the axial direction. The squirt hole (42) squirts the coolant such that the coolant is distributed to an inner peripheral surface (C1, C2) of the coil end (22) and an end surface (A1, A2) of the coil end (22) in the axial direction.

Abstract: A hybrid vehicle is equipped with an engine that is connected to a power split mechanism, a generator, an electric motor, and also a stepped transmission that is arranged between the electric motor and a drive shaft. An electronic control unit (an ECU) with which this hybrid vehicle is equipped revises a down line downward to make a downshift likely to occur when at least one of a prescribed generator condition and a prescribed electric motor condition is fulfilled. The generator condition includes that the temperature of the generator is equal to or higher than a first reference temperature and that an absolute value of a rotational speed of the generator decreases due to the making of the downshift. The electric motor condition includes that the temperature of the electric motor is equal to or higher than a third reference temperature.

Abstract: A hybrid vehicle includes an engine, a motor configured to output power for traveling, a drive wheel coupled to the engine and the motor, a transmission provided i) between the engine and the motor and ii) between the engine and the drive wheel, the transmission being configured to shift gears in a plurality of stages or continuously, a refrigerant supply device including a pump and a refrigerant pressure regulation device, the refrigerant supply device being configured to supply a refrigerant to the motor, and the refrigerant supply device being configured to supply the refrigerant to the transmission as a hydraulic fluid, and at least one electronic control unit configured to control the refrigerant supply device based on a load situation of the motor by controlling a refrigerant supply pressure to the motor.

Abstract: A stator of a rotating electric machine includes a stator core, a plurality of insulators and a plurality of concentrated winding coils. The stator core includes an annular yoke and a plurality of teeth. The insulators are located along outer peripheral wall surfaces of the teeth. Each of the insulators includes a plurality of first surfaces and a plurality of second surfaces. The second surfaces connect the first surfaces. The coils are fitted on the teeth on which the insulators have been placed from a radially inner side thereof. The first surfaces of each of the insulators are in contact with inner peripheral surfaces of the coil that is placed on the outer periphery of the insulator.

Abstract: A stator includes a stator core, an insulating body, a coil, and a resin-molded product. The stator core includes a circumferentially side surface and an axially upper surface. The insulating body includes a side wall and an upper wall. The side wall covers the circumferentially side surface of the stator core. The upper wall covers the axially upper surface of the stator core. A radially inner side end surface of the upper wall is positioned farther toward a radially outer side than a radially inner side end surface of the side wall. The resin-molded product covers the coil.

Abstract: A control device for a hybrid vehicle, including a mode whereby the vehicle runs using a motor only, and a mode whereby the vehicle uses both the motor and an engine. When the motor temperature of an MG(2) exceeds a threshold temperature, an ECU moves from a running mode that uses the MG(2) only, to a running mode that limits the load on the MG(2). The ECU performs control in accordance with the charging state of the battery for running, such that the work rate of an electric pump for cooling the MG(2) is increased when the charging state is higher, and the running mode that uses the MG(2) only is maintained.

Abstract: A hybrid vehicle includes an engine, a motor configured to output power for traveling, a drive wheel coupled to the engine and the motor, a transmission provided i) between the engine and the motor and ii) between the engine and the drive wheel, the transmission being configured to shift gears in a plurality of stages or continuously, a refrigerant supply device including a pump and a refrigerant pressure regulation device, the refrigerant supply device being configured to supply a refrigerant to the motor, and the refrigerant supply device being configured to supply the refrigerant to the transmission as a hydraulic fluid, and at least one electronic control unit configured to control the refrigerant supply device based on a load situation of the motor by controlling a refrigerant supply pressure to the motor.

Abstract: An electric powered vehicle includes: a motor; an inverter configured to convert electric power from a battery to drive the motor; a transmission configured to shift the rotation output of the motor at a variable transmission gear ratio; and a controller configured to control the inverter to control the driving of the motor and to control a change in the shift gear stage, and to perform high surge region avoidance control for changing the gear ratio of the transmission to change a motor rotation speed while maintaining a vehicle speed and changing an operation point outside a high surge region, when the operation point of the motor enters the high surge region where the inverter is controlled by a PWM overmodulation control system, and the high surge region is defined to be equal to or higher than a predetermined rotation speed and equal to or less than predetermined torque.

Abstract: A vehicle control system includes: a power unit including an electric rotary machine; an electric coolant pump configured to circulate a coolant that cools the electric rotary machine; and a control unit configured to operate the electric coolant pump based on a condition that a temperature of the electric rotary machine is equal to or higher than a predetermined operation threshold temperature, and a condition that an output of the electric rotary machine is equal to or higher than a predetermined operation threshold output.