Abstract: A polymer particle containing magnetic material includes a core and a polymer layer. The core includes magnetic fine particles. The polymer layer is located outside the core and surrounds the core. A shape ratio (Ric) is defined in each of the magnetic fine particles by dividing a diameter (Di) of an inscribed circle of the magnetic fine particle by a diameter (Do) of a circumscribed circle of the magnetic fine particle. The shape ratio (Ric) of the magnetic fine particle is 0.50 or more and 0.94 or less. The diameter (Di) of the magnetic fine particle is 5 nm or more. The diameter (Di) and the shape ratio (Ric) of the magnetic fine particle satisfy a relation formula of Di?9.28×e{circumflex over (?)}(1.17×Ric).

Abstract: A power transmission system includes first differential mechanism connected to an engine, and second differential mechanism. The first differential mechanism includes a first rotating element connected to the engine, and second and third rotating elements. The second differential mechanism includes a fourth rotating element connected to second rotating element, fifth rotating element connected to a first electric rotary machine, and sixth rotating element that is an output element of the second differential mechanism. The power transmission system further includes at least one of a first clutch and brake, and a second clutch. The first clutch is configured to releasably couple two of the first, second and third rotating elements to each other. The brake is configured to releasably couple the third rotating element to a stationary element. The second clutch is configured to releasably couple the third rotating element to one of the fifth and sixth rotating elements.

Abstract: A hybrid vehicle includes a clutch and a transmission unit configured to be able to switch into a neutral state. The hybrid vehicle is able to transmit power of an engine through any one of a first path through which power is transmitted from the engine to a first MG via a transmission unit and a differential unit and another second path through which power is transmitted from the engine to the first MG. The clutch is provided in the second path, and switches between an engaged state and a released state. The controller controls the engine, the first MG, the transmission unit and the clutch. The controller sets the transmission unit to a non-neutral state, sets the clutch to the engaged state, and then causes the vehicle to travel by using driving force from the first MG and driving force from the second MG.

Abstract: A drive unit for a hybrid vehicle an axial length thereof is shortened is provided. A power distribution device is disposed in an inner circumferential side of a cylindrical output gear, and at least a portion of a second clutch is also disposed in the inner circumferential side of the output gear while being adjacent to the power distribution device in an axial direction.

Abstract: A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode, a step of reducing an engine torque, a step of releasing a clutch, a step of reducing a reaction torque of a first rotary electric machine and a step of increasing a torque of a second rotary electric machine, and, when synchronization is started and a step of increasing a positive torque of the first MG, a step of starting engagement of a clutch, and, when a rotation speed of the first rotary electric machine and a rotation speed of an engine are synchronous with each other, a step of engaging the clutch.

Abstract: A transmission unit is able to switch between a non-neutral state where power of an engine is transmitted via a path K1 and a neutral state where power of the engine is not transmitted via the path K1. A clutch is able to switch between an engaged state where power is transmitted from the engine to a first MG and a released state where transmission of power from the engine to the first MG is interrupted. When the transmission unit is controlled to the non-neutral state and, at the same time, the clutch is set to the released state, a vehicle is operable in series-parallel mode. When power is transmitted via the path K2 by directly coupling the engine to the first MG by the clutch and the path K1 is interrupted by controlling the transmission unit to the neutral state, the vehicle is operable in series mode.

Abstract: A hybrid vehicle includes a transmission unit and a clutch. The transmission unit is configured to be able to switch into a neutral state. The hybrid vehicle is able to transmit power of an engine through any one of a first path through which power is transmitted to a first MG from the engine via the transmission unit and a differential unit and another second path through which power is transmitted from the engine. The clutch is provided in the second path. The clutch switches between an engaged state where power is transmitted and a released state where transmission of power is interrupted. The controller sets the transmission unit to the neutral state and sets the clutch to the engaged state, and then starts the engine by increasing the rotation speed of the engine with the use of the first MG.

Abstract: A hybrid vehicle is able to select series-parallel mode by engaging a clutch (C1) or a brake (B1) and releasing a clutch (CS), and is able to select series mode by releasing both the clutch (C1) and the brake (B1) and engaging the clutch (CS). The hybrid vehicle includes a simultaneous supply prevention valve (550) that prevents simultaneous engagement of the clutch (CS) and at least one of the clutch (CI) or the brake (B1). When a signal pressure of at least one of hydraulic pressure for engaging the clutch (C1) or hydraulic pressure for engaging the brake (B1) is input to the simultaneous supply prevention valve (550), the simultaneous supply prevention valve (550) is switched to a state where supply of hydraulic pressure to the clutch (CS) is cut off.

Abstract: A hybrid vehicle includes an electronic control unit configured to, when the drive mode is changed from one of the series-parallel mode and the parallel mode to the other one of the series-parallel mode and the parallel mode and the speed stage is changed from one of the low speed stage and the high speed stage to the other one of the low speed stage and the high speed stage, selectively execute either one of a first control and a second control. The first control is control in which the drive mode and the speed stage are changed by passing through the series mode. The second control is control in which one of the drive mode and the speed stage is changed and then the other one of the drive mode and the speed stage is changed without passing through the series mode.

Abstract: A hybrid vehicle includes a transmission unit and a clutch. The transmission unit is configured to be able to switch into a neutral state. The hybrid vehicle is able to transmit power of an engine through any one of a first path through which power is transmitted to a first MG from the engine via the transmission unit and a differential unit and another second path through which power is transmitted from the engine. The clutch is provided in the second path. The clutch switches between an engaged state where power is transmitted and a released state where transmission of power is interrupted. The controller sets the transmission unit to the neutral state and sets the clutch to the engaged state, and then starts the engine by increasing the rotation speed of the engine with the use of the first MG.

Abstract: A hybrid vehicle includes a clutch and a transmission unit configured to be able to switch into a neutral state. The hybrid vehicle is able to transmit power of an engine through any one of a first path through which power is transmitted from the engine to a first MG via a transmission unit and a differential unit and another second path through which power is transmitted from the engine to the first MG. The clutch is provided in the second path, and switches between an engaged state and a released state. The controller controls the engine, the first MG, the transmission unit and the clutch. The controller sets the transmission unit to a non-neutral state, sets the clutch to the engaged state, and then causes the vehicle to travel by using driving force from the first MG and driving force from the second MG.

Abstract: A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode, a step of reducing an engine torque, a step of releasing a clutch, a step of reducing a reaction torque of a first rotary electric machine and a step of increasing a torque of a second rotary electric machine, and, when synchronization is started and a step of increasing a positive torque of the first MG, a step of starting engagement of a clutch, and, when a rotation speed of the first rotary electric machine and a rotation speed of an engine are synchronous with each other, a step of engaging the clutch.

Abstract: A hybrid vehicle includes an engine (10), a first motor generator (MG1), a second motor generator (MG2), a transmission unit (power transmission unit) (40), a differential unit (50), a clutch (CS) and a mechanical oil pump (501). The hybrid vehicle is able to switch between series-parallel mode in which power of the engine is transmitted via the transmission unit and the differential unit and series mode in which power of the engine is transmitted via the clutch. The differential unit (50) is a planetary gear mechanism including a sun gear (S2) connected to the first motor generator (MG1), a ring gear (R2) connected to the second motor generator (MG2), and a carrier (CA2) connected to a ring gear (R1) that is an output element of the transmission unit (40). The mechanical oil pump (501) is driven by power that is transmitted from the carrier (CA2) of the differential unit.

Abstract: A power transmitting apparatus includes a transmission gear mechanism and a power split mechanism including a first rotation element connected to a first input member, a second rotation element connected to a rotary machine, and a third rotation element connected to the drive shaft via a first output member. The transmission gear mechanism is configured to transmit a torque to the first input member and the first rotation element via a second output member. The transmission gear mechanism and the power split mechanism are arranged on the same rotation axis as an output shaft of an engine. The transmission gear mechanism and the power split mechanism are arranged in the order of the transmission gear mechanism and the power split mechanism from the side closer to the engine. The second output member and the first input member are connected to each other by a spline or a serration.

Abstract: A transmission unit is able to switch between a non-neutral state where power of an engine is transmitted via a path K1 and a neutral state where power of the engine is not transmitted via the path K1. A clutch is able to switch between an engaged state where power is transmitted from the engine to a first MG and a released state where transmission of power from the engine to the first MG is interrupted. When the transmission unit is controlled to the non-neutral state and, at the same time, the clutch is set to the released state, a vehicle is operable in series-parallel mode. When power is transmitted via the path K2 by directly coupling the engine to the first MG by the clutch and the path K1 is interrupted by controlling the transmission unit to the neutral state, the vehicle is operable in series mode.

Abstract: A hybrid vehicle is able to select series-parallel mode by engaging a clutch (C1) or a brake (B1) and releasing a clutch (CS), and is able to select series mode by releasing both the clutch (C1) and the brake (B1) and engaging the clutch (CS). The hybrid vehicle includes a simultaneous supply prevention valve (550) that prevents simultaneous engagement of the clutch (CS) and at least one of the clutch (CI) or the brake (B1). When a signal pressure of at least one of hydraulic pressure for engaging the clutch (C1) or hydraulic pressure for engaging the brake (B1) is input to the simultaneous supply prevention valve (550), the simultaneous supply prevention valve (550) is switched to a state where supply of hydraulic pressure to the clutch (CS) is cut off.

Abstract: A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode, a step of reducing an engine torque, a step of releasing a clutch, a step of reducing a reaction torque of a first rotary electric machine and a step of increasing a torque of a second rotary electric machine, and, when synchronization is started and a step of increasing a positive torque of the first MG, a step of starting engagement of a clutch, and, when a rotation speed of the first rotary electric machine and a rotation speed of an engine are synchronous with each other, a step of engaging the clutch.

Abstract: A hybrid vehicle includes an engine (10), a first motor generator (MG1), a second motor generator (MG2), a transmission unit (power transmission unit) (40), a differential unit (50), a clutch (CS) and a mechanical oil pump (501). The hybrid vehicle is able to switch between series-parallel mode in which power of the engine is transmitted via the transmission unit and the differential unit and series mode in which power of the engine is transmitted via the clutch. The differential unit (50) is a planetary gear mechanism including a sun gear (S2) connected to the first motor generator (MG1), a ring gear (R2) connected to the second motor generator (MG2), and a carrier (CA2) connected to a ring gear (R1) that is an output element of the transmission unit (40). The mechanical oil pump (501) is driven by power that is transmitted from the carrier (CA2) of the differential unit.

Abstract: A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode, a step of reducing an engine torque, a step of releasing a clutch, a step of reducing a reaction torque of a first rotary electric machine and a step of increasing a torque of a second rotary electric machine, and, when synchronization is started and a step of increasing a positive torque of the first MG, a step of starting engagement of a clutch, and, when a rotation speed of the first rotary electric machine and a rotation speed of an engine are synchronous with each other, a step of engaging the clutch.

Abstract: A control system for a hybrid vehicle having an engine and a plurality of motors is provided. An operating mode of the hybrid vehicle is selected depending on a required driving force from a first mode where the vehicle is powered by the engine, a second mode where the vehicle is powered by the plurality of motors, and a third mode where the vehicle is powered by any one of the motors. The control system is characterized by a detection means that detects an output power of the prime mover, and a setting means that alters a selectability of the second mode in accordance with the output power of the prime mover.