An oil supply device for an electric vehicle powertrain apparatus, includes an electric oil pump, a motor lubrication flow path connected to the electric oil pump and provided to supply oil from the electric oil pump to a bearing of a motor, a motor cooling flow path branched from the motor lubrication flow path to supply oil for cooling the motor from the electric oil pump, and a cooling control valve apparatus provided in the motor cooling flow path to control oil supplied to the motor through the motor cooling flow path according to an operating state of the electric oil pump.

Embodiments of a cold start lubricant distribution system include a lubricant distribution circuit, which fluidly interconnects first and second actively-lubricated work vehicle assemblies onboard a work vehicle. A flow divider section is included in the lubricant distribution circuit and through which lubricant flow is apportioned between the first and second actively-lubricated work vehicle assemblies. A lubricant supply pump is further located in the lubricant distribution circuit upstream of the flow divider section. The cold start lubricant distribution system further includes a lubricant flow modification assembly operably in a cold start mode. When operating in the cold start mode, the lubricant flow modification assembly reduces a volume of lubricant flow supplied to the first actively-lubricated work vehicle assembly through the flow divider section relative to a volume of lubricant flow supplied to the second actively-lubricated work vehicle assembly through the flow divider section.

A vehicle drive device includes: a rotary electric machine; a drive transmission mechanism provided in a power transmission path connecting a rotor shaft of the rotary electric machine and a wheel; a first hydraulic pump driven by a driving force transmitted through the power transmission path; a second hydraulic pump driven by a driving force source independent of the power transmission path; a first oil passage that supplies oil discharged from the first hydraulic pump to a rotor bearing that supports the rotor shaft such that the rotor shaft is rotatable; and a second oil passage that supplies oil discharged from the second hydraulic pump to an inner peripheral surface of the rotor shaft.

A speed reducer according to the present invention includes: at least one gear member for changing a speed of rotations input from a rotary device and outputting the rotations; a case housing the gear member; and a heating unit provided on the case and configured to heat the case or an inside of the case.

A heat control device (1) comprises: a radiator (12) that cools cooling water for cooling a vehicle engine (11); a transmission (13) that transmits the power generated at the engine (11); an air-cooling type oil cooler (14) that cools the transmission oil for cooling the transmission (13) by heat exchange with the air outside the vehicle; a water-cooling type oil cooler (15) that cools the transmission oil by heat exchange with the cooling water; and a flow path switching unit (16) that switches between causing the transmission oil to flow into the air-cooling type oil cooler (14), or causing the transmission oil to flow into the water-cooling type oil cooler (15).

A hydraulic circuit for a vehicle driving device includes an oil pump, a clutch oil passage, a cooling oil passage, a pressure regulating valve, and a shift valve. The cooling oil passage guides oil to a cooled portion of a vehicle. Supply of oil to the clutch oil passage and the cooling oil passage is switched by switching of the pressure regulating valve and the shift valve. The cooling oil passage includes: a shaft center cooling oil passage which supplies cooling oil to a shaft center of a rotation shaft of an electric motor mounted on the vehicle; and a cooling oil passage shift valve which switches presence/absence of supply of oil to the shaft center cooling oil passage.

A method of oil pre-conditioning for an electric powertrain for a vehicle configured to provide electric propulsion of the vehicle, said electric powertrain comprising the first electric motor being linked to the first gear module, a secondary shaft being linked to the second gear module, the second electric motor being linked to the third gear module through a motor shaft, the differential being shared by both electric motors,

The electric powertrain is surrounded by an oil. The method includes the steps of selecting an oil pre-conditioning configuration wherein the secondary shaft does not rotate and at least one of the first electric motor or the second electric motor rotates while the other is in driving mode leading to the heating of the oil to reach a threshold temperature and applying the selected oil pre-conditioning configuration.

A lubricant supported electric motor includes a static member and a movable member movably disposed within the static member to define a gap therebetween. The static member may be configured as a stator and the movable member may be configured as a rotor. The movable member may also be configured to move relative to the static member. The static member and movable member are configured to exert an electromagnetic force therebetween and convert electrical energy into mechanical energy and move the movable member. A lubricant is disposed in the gap between the static member and the movable member to support the movable member relative to the static member.

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.

A lubricating oil circuit of a turbomachine includes a distribution valve that distributes an oil flow rate among a first heat exchanger and a bypass duct, connected to an oil duct, which is connected to an heat exchanger positioned against a turbomachine fuel passage duct, and includes a gearbox of a rotation speed reducer that lowers a rotational speed of a first rotary fan shaft of the turbomachine relative to a rotational speed of a second low-pressure compressor rotary shaft of the turbomachine or of a second low-pressure turbine rotary shaft of the turbomachine, and a regulation device. The regulation device includes a local regulation loop that generates an oil flow rate distribution control signal and regulates an oil temperature of the oil duct on a temperature setpoint, and a global regulation loop that generates the temperature setpoint as a function of the temperature and of the temperature setpoint.