The present invention relates to a work machine, in particular a wheeled loader, having an electric motor and having oil cooling that is suitable and intended to cool the electric motor and having a driving axle that has an oil reservoir, wherein a feed line from said oil reservoir to the electric motor and a discharge line from the electric motor to said oil reservoir are present and a pump is present to pump oil from the oil reservoir to the electric motor so that the electric motor is cooled by means of oil from the oil reservoir of the driving axle.

An electrical generation system for a vehicle includes a vehicle having a generator for producing electric current. The vehicle has a cavity having a fan and a radiator. The radiator is in fluid communication with the generator to allow a temperature of the generator to be controlled. An air inlet passage extends through a wall of the vehicle and is configured to direct air from outside the vehicle toward an inlet side of the radiator to provide increased static pressure of the air to the inlet side of the radiator compared to an ambient pressure of the air when the vehicle is in motion.

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.

An oil supply arrangement of a vehicle with an electric machine in a housing with at least one oil volume connected to an oil volume of a transmission housing of the vehicle for oil supply. The oil volume of the electric machine is divided into at least two oil supply spaces to compensate an oil level in the housing. A first oil supply space is arranged at a side of the housing facing the driving direction of the vehicle and a second oil supply space is arranged at a side of the housing opposite the driving direction of the vehicle.

A method for operating a motor vehicle that has an internal combustion engine and an automated manual transmission, connected between the engine and a drive output. The transmission includes a shifting element group with a plurality of shifting elements. The transmission further includes an oil pump and an electric machine, both of which are integrated in the transmission and coupled to an input shaft of the transmission. The oil pump delivers a flow of transmission oil for cooling the shifting element group and cooling the electric machine, and the shifting elements of the shifting element group are controlled and shifted by an actuator system that is independent of the oil pump. When the motor vehicle is at rest, the oil pump is driven by the electric machine in order to cool the electric machine while the motor vehicle is at rest.

A temperature control arrangement (1) of a motor vehicle has an electric machine (2) with a rotor (3) and a stator (4), a stator cooling arrangement with a first cooling circuit (6) for cooling the stator (4) with a first cooling medium (8) flowing in the first cooling circuit (6) that is formed by a motor vehicle cooling circuit, a rotor cooling arrangement with a second cooling circuit (7) for cooling the rotor (3) with a second cooling medium (9) flowing in the second cooling circuit (7) that is formed by a transmission oil cooling circuit, a heat exchanger (10) that thermally couples the first cooling circuit (6) and the second cooling circuit (7). The stator cooling arrangement is configured such that the first cooling medium (8) makes direct contact with the stator windings.

A lubricant supply system for an electric vehicle includes a lubricant supported electric motor and a lubricant supply line extending from a high pressure source to the lubricant supported electric motor for supplying lubricant to the lubricant supported electric motor. In one arrangement, at least one powertrain component is disposed in fluid communication with the lubricant supply line and fluidly connected in parallel with the lubricant supported electric motor for supplying lubricant to the powertrain component. In an alternative arrangement, the powertrain component is fluidly connected in series with and downstream from the lubricant supported electric motor for supplying lubricant from the lubricant supported electric motor to the powertrain component. In either arrangement, the lubricant supported electric motor is incorporated into an existing lubricant supply system of the vehicle to reduce cost and complexity relative to prior designs which required a dedicated lubricant supply for the lubricant supported electric motor.

A cooling system includes a shared path; a first path connected to the shared path and having a first pump and a first heat exchanger exchanging heat with an inverter; a second path connected to the shared path in parallel with the first path and having a second pump and a second heat exchanger exchanging heat with a battery. The first and second paths are configured to be able to switch a flow state between a first state where the heat media flow through the shared path, and a second state where one of the heat media does not flow through the shared path. The control device controls the outputs of the pumps so that when switching the flow state between the first and second states, flow rate of the heat medium flowing through the first path becomes temporarily larger than the target flow rate.

A cooling circuit arrangement includes first and second closed cooling circuits. Each closed cooling circuit has a heat source, a pump and a radiator. By way of the first pump of the first circuit, a coolant can be conveyed to the first radiator and from the first radiator to the first heat source and from the latter to the first pump. By way of the second pump of the second circuit, a coolant can be conveyed to the second radiator and can be conveyed from the second radiator to the second heat source and from the latter to the second pump. Downstream of the first pump and of the second pump, there is provided a first fluidic connection which is controllable by a first valve. Upstream of the first pump and the second pump, there is provided a second fluidic connection which is controllable by a second valve.

A motor unit includes a motor including a rotor, a stator radially outside of the rotor; a housing for housing the motor; an oil passage for circulating the oil in the housing space; and a gear portion connected to a shaft of the rotor. The housing includes a motor housing portion defining a motor chamber in an interior, a gear housing portion defining a gear chamber in an interior, and a partition dividing the gear chamber and the motor chamber. The oil passage includes a flow passage arranged in an interior of the housing, and an oil feeding structure on an upper side of the motor to feed the oil to at least one of a stator core or coil ends. The flow passage includes a portion extending along an axial direction to feed the oil to the oil feeding structure. The partition includes the portion of the flow passage.