Systems and methods for cooling and delivering oil for an electric vehicle are described. In one example, viscosity of oil and resistance to oil flow of an oil circuit reduce oil flow through a cooling circuit so as to reduce powertrain losses that may be related to oil viscosity. At higher temperatures, the viscosity of oil allows the oil to flow through the cooling circuit and lower a temperature of an electric machine.

A self-contained oil lubricated bearing bracket system for a vehicle includes a bracket component having a body including an inner surface defining, at least in part, a first opening, a second opening, and an interior portion defining, at least in part, a lubricant reservoir. A bearing is mounted to the bracket component. The bearing includes a plurality of bearing elements, at least one of the plurality of bearing elements is arranged in the lubricant reservoir.

A self-contained oil lubricated bearing bracket system for a vehicle includes a bracket component having a body including an inner surface defining, at least in part, a first opening, a second opening, and an interior portion defining, at least in part, a lubricant reservoir. A bearing is mounted to the bracket component. The bearing includes a plurality of bearing elements, at least one of the plurality of bearing elements is arranged in the lubricant reservoir.

A system and method for monitoring a service life of lubricant that is applied to vehicle components is disclosed. The method includes receiving at least one input parameter. The input parameter relates to the vehicle's operation. The method also includes determining a remaining service life of a lubricant. The lubricant is applied to a driveline component of the vehicle. The determination of the remaining service life of the lubricant is based on the receiving of at least one input parameter.

A hybrid drive system and associated methods are described that include an internal combustion engine, an electric motor, and a liquid cooling system. In one example, the liquid cooling system includes an oil circulation system that cools selected components, and lubricates selected components.

A hybrid drive system and associated methods are described that include an internal combustion engine, an electric motor, and a liquid cooling system. In one example, the liquid cooling system includes an oil circulation system that cools selected components, and lubricates selected components.

A vehicle hydraulic supply apparatus with an oil passage component member that includes a first surface being in contact with a first rotor that is a pump rotor of the mechanical oil pump, a second surface facing in a direction opposite to a direction in which the first surface faces and being in contact with a second rotor that is a pump rotor of the electric oil pump, and a suction oil passage and a discharge oil passage of the mechanical oil pump which are located between the first surface and the second surface, and a suction oil passage and a discharge oil passage of the electric oil pump which are located between the first surface and the second surface.

A vehicle hydraulic supply apparatus with an oil passage component member that includes a first surface being in contact with a first rotor that is a pump rotor of the mechanical oil pump, a second surface facing in a direction opposite to a direction in which the first surface faces and being in contact with a second rotor that is a pump rotor of the electric oil pump, and a suction oil passage and a discharge oil passage of the mechanical oil pump which are located between the first surface and the second surface, and a suction oil passage and a discharge oil passage of the electric oil pump which are located between the first surface and the second surface.

A temperature controlled axle cooling system and method is disclosed. Axle hydraulic circuits cool oil circulating through vehicle axles, and sensors monitor axle temperatures. Pumps are activated to circulate the oil through the axle circuits based on the axle temperatures. Each axle circuit can be a separate closed-loop hydraulic system, not sharing fluid with any other vehicle or axle hydraulic systems. All axle cooling system pumps can be activated when any axle temperature exceeds a high threshold. All pumps can be deactivated when all axle temperatures are below a low threshold. Each pump can be activated and deactivated based only on that axle's temperature. The axle cooling system pumps can be driven by motors powered by the main vehicle hydraulic system flow. A valve can be controlled based on axle temperature to allow main vehicle hydraulic system flow. Multiple pumps can be driven by a single motor.

An exemplary fluid heating method includes, among other things, operating an engine of a vehicle to heat an engine fluid during a drive cycle if the vehicle is in a fluid maintenance mode, and heating the fluid prior to the drive cycle if the vehicle is in the fluid maintenance mode and the vehicle is electrically coupled to a grid power source. An exemplary fluid heating assembly includes, among other things, an engine of an electrified vehicle, and a fluid heater that is activated to heat a fluid of the engine in response to the electrified vehicle being in a fluid maintenance mode when electrically coupled to a grid power source.