A device cools a power train of a vehicle including an electric machine with a wound rotor coupled to a speed reducer. The device includes: an oil cooling circuit for cooling the electric machine, the circuit include a heat exchanger connected to an oil tank and a water circuit that connects members of the power train through the radiator of the vehicle; a temperature adjuster of the oil flow supplied at the outlet of the exchanger to a distribution circuit projecting the oil to elements for heating the electric machine; a circuit for lubricating the reducer, the circuit including a sump, the bottom of the sump forming a reserve of oil for lubricating the reducer; and a bypass channel at the outlet of the exchanger, for conveying a portion of the temperature-adjusted oil in contact with the bottom of the sump in order to cool the oil reserve.

The examples relate to a drive device for an electrified vehicle axle of a vehicle, with an electric machine which outputs via a transmission to drive shafts which lead to vehicle wheels of the vehicle axle, and with a coolant and/or lubricant module which supplies the electric machine and/or the transmission with coolant and/or lubricant. The electric machine, the transmission and the module being joined together to form an structural unit, in which the electric machine and the coolant/lubricant module may be flange-connected to the transmission in a manner to be spaced apart axially from one another, and, on its side which lies axially opposite the transmission. The electric machine having a radially protruding cantilever which bridges an axial spacing (x) from the coolant/lubricant module and which, at its free cantilever end, is attached in a force-transmitting manner via at least one bolt location (A) to the coolant/lubricant module, for example, to reduce operationally induced vibrations in the structural unit. In an example, at the cantilever end, a stop element may be provided with an adjustable stroke between a non-use position (N) and a supporting position (S). Before the bolt location (A) is tensioned fixedly, the stroke of the stop element can be adjusted, using up a tolerance gap, until in contact with the module supporting face, with the result that the cantilever end and the module can be braced to one another in a manner which is free from tolerance-induced component deformations.

A hybrid vehicle includes: an oil passage including a common oil passage through which lubricating oil discharged from an oil pump flows, an engine lubricating oil passage extending from the common oil passage toward an engine internal space, and a transmission lubricating oil passage extending from the common oil passage toward a transmission internal space; and a variable throttle valve that can change a flow rate in the transmission lubricating oil passage. The variable throttle valve increases an opening degree of the variable throttle valve in a mode transition in which a first traveling mode in which the hybrid vehicle travels by driving power of an engine transitions to a second traveling mode in which the hybrid vehicle stops the engine and travels by the driving power of the electric motor.

A vehicle drive device includes: a rotating electrical machine that functions as a driving force source for wheels; an input member drivingly connected to rotating electrical machine; a pair of output members each drivingly connected to wheel; a differential gear mechanism that distributes rotation transmitted from rotating electrical machine to pair of output members; a transmission gear mechanism that drivingly connects input member and differential gear mechanism; a hydraulic pump that includes a pump rotor and chamber housing the pump rotor and that supplies oil to at least the rotating electrical machine; and a case. The case includes a partition portion that separates in an axial direction a first housing chamber housing rotating electrical machine and a second housing chamber housing transmission gear mechanism and differential gear mechanism). Pump chamber is formed in partition wall so as to be located between first and second housing chambers in the axial direction.

In a drive apparatus, a ring gear of a differential device is rotatable about a third axis in a direction opposite to a counter gear of a deceleration device. The inner surface of the gear housing accommodating the deceleration device, the differential device, and the reservoir capable of storing a fluid includes first and second curved surfaces disposed in the +X direction with respect to the third and second axes, respectively. At least a part of the first curved surface faces the radially outer end portion of the ring gear in the radial direction and extends in the circumferential direction. At least a part of the second curved surface faces the radially outer end portion of the counter gear in the radial direction and extends in the circumferential direction. The position of the reservoir in the Y-axis direction overlaps the first curved surface and the second curved surface.

An input member and a differential gear mechanism include a part arranged on an axial first side with respect to a rotary electric machine. The differential gear mechanism is connected to first wheel via shaft member including part that is arranged on axial second side with respect to differential gear mechanism. A case includes an outer peripheral support portion that is formed along core outer peripheral surface that is an outer peripheral surface of stator core, and that supports core outer peripheral surface in radial direction. A notch portion in which outer peripheral support portion is notched over entire area of arrangement area of stator core in an axial direction is formed in outer peripheral support portion, and notch portion is arranged at position that is between core outer peripheral surface and shaft member in radial direction, and that overlaps shaft member as seen in radial direction along radial direction.

A lubrication device for a power take off coupling for a prime mover, the lubrication device including: a lubrication device shaft having a first end for connecting to an output shaft of the prime mover and a second end for connecting to an input shaft for receiving power from the output shaft; a lubricant chamber surrounding at least part of the lubrication device shaft between the first end and the second end; and a housing enclosing the lubrication device shaft and the lubricant chamber; wherein the lubrication device shaft includes a plurality of internal lubricant passages for conveying lubricant from the lubricant chamber to the first end and the second end of the lubrication device shaft, with the internal lubricant passages comprising fluid passages extending along the axial length of the lubrication device shaft as well as fluid passages extending radially to outer surfaces of the lubrication device shaft.

A vehicle electric drive apparatus is provided with a single hydraulic pump and left-side and right-side drive units. The left-side drive unit includes a left-side electric motor and a left-side transmission mechanism. The right-side drive unit includes a right-side electric motor and a right-side transmission mechanism. One of rotary shafts of the left-side transmission mechanism and one of rotary shafts of the right-side transmission mechanism constitute a pair of pump-drive rotary shafts. The single hydraulic pump is connected to the pair of pump-drive rotary shafts through respective one-way clutches, and is to be driven by one of the pump-drive rotary shafts that is rotated at a speed higher than the other of the pump-drive rotary shafts, so as to output a hydraulic pressure.

A rotating electrical machine and an input member are placed on a first axis, a counter gear mechanism is placed on a second axis, and a differential gear mechanism is placed on a third axis. The input member, the counter gear mechanism, and the differential gear mechanism have portions placed on an axial first side with respect to the rotating electrical machine. A pump portion is placed on the opposite side of an imaginary plane passing through the first axis and the third axis from the second axis, and is placed at a location that overlaps at least one of the rotating electrical machine and the differential gear mechanism in an axial view. The pump portion is placed on the axial first side with respect to the rotating electrical machine.

The invention relates to a method of managing the oil temperature of a transmission of a motor vehicle, the transmission comprising a lubrication circuit and an oil cooling circuit, the oil temperature management circuit comprising a liquid/liquid heat exchanger mounted on the lubrication circuit, the lubrication circuit comprising a pump for circulating the oil in the lubrication circuit, and a temperature sensor wherein, before a starting stage of the vehicle, if the temperature of the oil is lower than a first value, the pump of the lubrication circuit is activated so as to circulate the oil in the liquid/liquid exchanger.