An oil supply system of a vehicle includes: a first pump generating a first quantity of oil to cool a driving motor of a hybrid vehicle; a second pump generating a second quantity of oil to lubricate a friction lubrication element of the hybrid vehicle; a flow channel switching valve selectively switching a flow channel of the first quantity of oil and a flow channel of the second quantity of oil to connect the flow channel of the first quantity of oil to the friction lubrication element or connect the flow channel of the second quantity of oil to the driving motor; and a controller controlling an operation of the flow channel switching valve to supply a portion of the first quantity of oil to the friction lubrication element or a portion of the second quantity of oil to the driving motor.

A motor vehicle vacuum driven hydraulic balance system includes a housing. A shaft rotatably supported in the housing has a longitudinal bore to deliver oil flow to a plurality of ports created in the shaft. A vacuum flow passage communicates with both the longitudinal bore and an oil sump. A first delivery passage is created in a portion of the housing, the first delivery passage in direct communication with the longitudinal bore. An electrical oil pump pumps oil from the oil sump to the longitudinal bore through the first delivery passage. Axial rotation of the shaft creates a partial vacuum in the longitudinal bore acting to vacuum drag oil from the oil sump through the vacuum flow passage to the longitudinal bore in addition to a volume of the oil delivered to the longitudinal bore by the electrical oil pump.

The motor cooling system circulates cooling oil for cooling a motor. A transmission is configured to change a rotation speed ratio of an output shaft with respect to an input shaft by changing a rotation speed of the motor. A transmission case has an output shaft case for housing the output shaft. The output shaft case is positioned forward of the motor and protrudes to a position below the motor. The motor cooling system has a cooling oil tank for storing the cooling oil and a cooling oil pipe which connects a cooling oil tank and the motor. The cooling oil tank is positioned behind the output shaft case and under the motor.

A drive unit of a hybrid vehicle includes an engine; an electric motor; first and second differential mechanisms; a selectable one-way clutch; and a case accommodating the electric motor. Further, the first differential mechanism includes a first rotational element coupled to the electric motor, a second rotational element coupled to the engine, and a third rotational element that outputs power toward drive wheels, the second differential mechanism includes a sun gear coupled to the electric motor, a carrier coupled to the engine, a ring gear whose rotation is regulated by the selectable one-way clutch, and a ring gear flange that rotates integrally with the ring gear, and the selectable one-way clutch switches a state thereof between a locked state and an unlocked state, and the ring gear flange is supported by a rotor shaft of the electric motor via a radial bearing.

An electrified vehicle according to an exemplary aspect of the present disclosure includes, among other things, a transmission and an electrically powered heating device configured to selectively warm a transmission fluid circulated inside the transmission.

A lubrication control device of in-wheel motor units for a vehicle which is used in an in-wheel motor drive vehicle which can run by driving at least a pair of left and right wheels by the respective in-wheel motor units, the lubrication control device being arranged to lubricate insides of the pair of left and right in-wheel motor units, by an oil pumped from lower portions within cases of the in-wheel motor units by respective oil pumps, the lubrication control device includes: an oil pump drive control section configured to control and drive the oil pumps so that oil levels of the lower portions within the cases of the left and right in-wheel motor units are the same by oil pumping amounts from the oil pumps.

An electric motor which is an in-wheel motor includes a motor housing, a motor stator, a rotation shaft, a motor rotor, and a rotational sensor. The rotation shaft has: a shaft portion rotatably supported by a plurality of bearings; a flange portion spreading toward the outer diameter side from the outer circumference of the shaft portion; and a cylindrical portion extending from the outer diameter end of the flange portion in parallel with the shaft portion, and having an outer circumference to which the motor rotor is fitted. The axial position of the rotational sensor is between the plurality of bearings, and the rotational sensor is provided on the inner diameter side of the cylindrical portion of the rotation shaft.

A drive apparatus includes a motor; a reduction gear connected to the motor; a differential connected to the reduction gear, for rotating an axle about a differential axis; a housing including a gear housing portion housing the reduction gear and the differential; and an oil housed in the gear housing portion. The differential includes a gear for rotating about the differential axis. An end portion of the gear is lower than the reduction gear, and is configured to soak in the oil. The housing includes an oil drain hole and an oil feed hole for joining an interior of the housing and a space outside of the housing, a first stopper member removably in the oil drain hole, and a second stopper member removably in the oil feed hole. Each of the oil drain hole and the oil feed hole is in a portion of the gear housing portion.

During the travel of a vehicle, the oil level of lubricating oil is lowered due to the suction by at least a first oil pump and the scraping-up by the rotation of a differential ring gear and so on. In particular, until the oil level becomes equal to or lower than an upper end of a first partition wall, the oil level is lowered due to both the suction by the first oil pump and the scraping-up by the rotation of the differential ring gear and so on, and therefore, a region, that is immersed in the lubricating oil, of the differential device rapidly becomes smaller. Since a suction port of the first oil pump is disposed in a second oil storage portion, the oil level in the second oil storage portion during the travel of the vehicle can be adjusted independently of that in a first oil storage portion.

An electric drive unit for a hybrid drive, in particular for a vehicle, has an increased power output and degree of efficiency, while thermal loading as well as required installation space and manufacturing costs are minimized. The electric drive unit has an asynchronous machine with a rotor with a rotor cage, in particular a rotor cage which is formed with copper conductors. The asynchronous machine is formed with a stator having a shaft winding. The shaft winding is formed with a device for star-delta changeover. The rotor is formed with a rotor internal cooling device. A step-up gear mechanism is arranged in a power train between the rotor and the output element. There is also described a hybrid drive device with an electric drive unit, and a vehicle that has an electric drive unit and/or a hybrid drive device.