Abstract: A drive control system for preventing damage from a power distribution device under a motor mode and for improving fuel efficiency. A time duration from termination of the first operating mode where a torque of the first motor is applied to the power distribution device while halting a carrier (at step S4), and a temperature of the power distribution device is estimated based on the calculated time duration (at step S13). The first operating mode is enabled if the estimated temperature is lower than a predetermined allowable temperature (at step S15), and inhibited if the estimated temperature is higher than the allowable temperature (at step S10).

Abstract: A control system for a hybrid vehicle includes an electronic control unit. The electronic control unit is configured to, when any one of the following conditions iii) to vi) is satisfied, activate the oil pump to start supplying oil to a power split mechanism: iii) a required driving force becomes larger than or equal to a first pump changing value when a first drive mode is selected; iv) a vehicle speed becomes higher than or equal to a second pump changing value when the first drive mode is selected; v) the required driving force becomes smaller than or equal to a third pump changing value when the third drive mode is selected; and vi) the vehicle speed becomes lower than or equal to a fourth pump changing value when the third drive mode is selected.

Abstract: A hybrid vehicle uses a first motor, a second motor and an engine as driving force sources and includes a gear transmission mechanism and an oil supply mechanism. The gear transmission mechanism transmits torque, output from the first motor, to a drive shaft side. The oil supply mechanism is driven by power other than power of the engine to supply oil to the gear transmission mechanism. When the hybrid vehicle is caused to travel by using the torque output from at least the first motor in a state where operation of the engine is stopped, and when an estimated amount of oil that is supplied from the oil supply mechanism to the gear transmission mechanism is smaller than or equal to a predetermined amount, an electronic control unit limits an operation state of the first motor such that load on the gear transmission mechanism decreases.

Abstract: A drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to; obtain at least one of a first time that is a duration of a motor driven state or a second time that is a duration of a state where the motor driven state is ended, estimate a temperature of the power split mechanism based on at least one of the first time or the second time, and allow or inhibit the motor driven state in accordance with a temperature of the power split mechanism, the first time, or the second time.

Abstract: A drive control system is for a hybrid vehicle. The drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to obtain a temperature of the power split mechanism based on a first time that is a duration of a motor driven state, allow the motor driven state when the obtained temperature obtained by the electronic control unit is lower than a predetermined upper limit temperature, and inhibit the motor driven state when the obtained temperature is higher than or equal to the upper limit temperature.

Abstract: A drive control system for a hybrid vehicle comprises a lubricating oil passage, a first oil pump, an electronic control unit, and an electronic control unit. The lubricating oil passage is configured to supply lubricating oil to the power split mechanism by causing the lubricating oil to flow outward in a radial direction of a power split mechanism. The first oil pump is configured to be allowed to be driven by a first motor, and configured to generate hydraulic pressure of the lubricating oil that lubricates the power split mechanism. The electronic control unit is configured to, when the hybrid vehicle is set to a one-motor mode after traveling in a two-motor mode, execute control for increasing an amount of the lubricating oil that is supplied to the power split mechanism by driving the first motor.

Abstract: A control system for a hybrid vehicle includes an electronic control unit. The electronic control unit is configured to, when any one of the following conditions iii) to vi) is satisfied, activate the oil pump to start supplying oil to a power split mechanism: iii) a required driving force becomes larger than or equal to a first pump changing value when a first drive mode is selected; iv) a vehicle speed becomes higher than or equal to a second pump changing value when the first drive mode is selected; v) the required driving force becomes smaller than or equal to a third pump changing value when the third drive mode is selected; and vi) the vehicle speed becomes lower than or equal to a fourth pump changing value when the third drive mode is selected.

Abstract: A hybrid vehicle uses a first motor, a second motor and an engine as driving force sources and includes a gear transmission mechanism and an oil supply mechanism. The gear transmission mechanism transmits torque, output from the first motor, to a drive shaft side. The oil supply mechanism is driven by power other than power of the engine to supply oil to the gear transmission mechanism. When the hybrid vehicle is caused to travel by using the torque output from at least the first motor in a state where operation of the engine is stopped, and when an estimated amount of oil that is supplied from the oil supply mechanism to the gear transmission mechanism is smaller than or equal to a predetermined amount, an electronic control unit limits an operation state of the first motor such that load on the gear transmission mechanism decreases.

Abstract: A drive control system is for a hybrid vehicle. The drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to obtain a temperature of the power split mechanism based on a first time that is a duration of a motor driven state, allow the motor driven state when the obtained temperature obtained by the electronic control unit is lower than a predetermined upper limit temperature, and inhibit the motor driven state when the obtained temperature is higher than or equal to the upper limit temperature.

Abstract: A drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to; obtain at least one of a first time that is a duration of a motor driven state or a second time that is a duration of a state where the motor driven state is ended, estimate a temperature of the power split mechanism based on at least one of the first time or the second time, and allow or inhibit the motor driven state in accordance with a temperature of the power split mechanism, the first time, or the second time.

Abstract: A drive control system for preventing damage from a power distribution device under a motor mode and for improving fuel efficiency. A time duration from termination of the first operating mode where a torque of the first motor is applied to the power distribution device while halting a carrier (at step S4), and a temperature of the power distribution device is estimated based on the calculated time duration (at step S13). The first operating mode is enabled if the estimated temperature is lower than a predetermined allowable temperature (at step S15), and inhibited if the estimated temperature is higher than the allowable temperature (at step S10).

Abstract: A sealing structure using a liquid gasket, having a liquid gasket interposed in the form of a thin film between mating surfaces of a first member and a second member, thereby preventing the movement of oil via the mating surfaces, the sealing structure, includes at oil-side end portions of the mating surfaces, a gasket lump portion that is formed of an excess of the thin-film liquid gasket squeezed out from the mating surfaces, and an oil-shielding portion that covers a boundary portion where the gasket lump portion and the first member come into contact, thereby preventing a flow of the oil from directly striking the boundary portion, and is provided on an oil-flow upstream side from the boundary portion.

Abstract: A vehicle power transmission device having a structure with a carrier of a planetary gear device brought into spline fitting with a case that is a non-rotating member to stop rotating and a ring gear of the planetary gear device rotatably supported by the case via a bearing, is provided with a play reducing device that presses the carrier against the case to reduce a play in thrust direction formed between the carrier and the case.

Abstract: A vehicle power transmission device having a structure with a carrier of a planetary gear device brought into spline fitting with a case that is a non-rotating member to stop rotating and a ring gear of the planetary gear device rotatably supported by the case via a bearing, is provided with a play reducing device that presses the carrier against the case to reduce a play in thrust direction formed between the carrier and the case.

Abstract: A sealing structure using a liquid gasket, having a liquid gasket interposed in the form of a thin film between mating surfaces of a first member and a second member, thereby preventing the movement of oil via the mating surfaces, the sealing structure, includes at oil-side end portions of the mating surfaces, a gasket lump portion that is formed of an excess of the thin-film liquid gasket squeezed out from the mating surfaces, and an oil-shielding portion that covers a boundary portion where the gasket lump portion and the first member come into contact, thereby preventing a flow of the oil from directly striking the boundary portion, and is provided on an oil-flow upstream side from the boundary portion.