A drive device includes a motor, a housing, an oil passage in the housing, an oil pump in which a portion of the oil passage is provided, and a strainer inside the housing and in which a portion of the oil passage is provided. The oil passage includes an oil sump in which oil is accumulated and a suction path connecting the oil sump and the oil pump. A central axis of the oil pump extends in a direction intersecting the vertical direction. The strainer is in the suction path. The strainer includes a suction port to suction oil from the oil sump, a discharge port to discharge oil toward the oil pump, and a filter. The suction port opens downward in the vertical direction. The discharge port opens in a direction intersecting the vertical direction toward the oil pump.

A drive device includes a motor housing and a transmission housing fixed to one side in an axial direction of the motor housing that includes a first housing and a second housing fixed to another side in the axial direction of the first housing. The transmission housing includes a third housing fixed to the first housing and a fourth housing fixed to one side in the axial direction of the third housing. The first housing includes a first opposing wall axially opposing the transmission housing, and a bearing holding portion on the first opposing wall. The third housing includes a second opposing wall opposing the first opposing wall. The housing includes an oil supply path extending axially through the second opposing wall from the inside of the transmission housing. The oil supply path includes a supply port to supply oil to the bearing.

A transmission includes a fan assembly having a fan wheel, a cover, and a grating. The fan wheel is connected in a torsionally fixed manner to the input shaft of the transmission, and the fan cover is fixed in place on a holding frame, which, for example, includes multiple parts and is fastened to the housing of the transmission. The grating is formed by two grating parts, whose first separating line is a straight segment or is formed by two mutually aligned straight segments, and the cover includes two cover parts, whose second separating line is a plane curve, made up of straight segment sections.

A disclosed lubrication system for a turbofan engine includes a pump for driving lubricant through a lubrication circuit, at least one sensor generating a signal indicative of an engine operating condition and at least one valve for controlling a flow of lubricant through the lubrication circuit. A controller controls operation of the valve to vary the flow of lubricant based on the engine operating condition to maintain lubricant flow within predefined operating limits.

A drive device includes a motor, a housing, an oil passage in the housing, an oil pump in which a portion of the oil passage is provided, and a strainer inside the housing and in which a portion of the oil passage is provided. The oil passage includes an oil sump in which oil is accumulated and a suction path connecting the oil sump and the oil pump. A central axis of the oil pump extends in a direction intersecting the vertical direction. The strainer is in the suction path. The strainer includes a suction port to suction oil from the oil sump, a discharge port to discharge oil toward the oil pump, and a filter. The suction port opens downward in the vertical direction. The discharge port opens in a direction intersecting the vertical direction toward the oil pump.

A liquid cooling heat dissipation structure and a gearbox casing that includes heat dissipation structure are disclosed. The heat dissipation structure includes a coolant tank and a cover plate that is used to seal the coolant tank. Two ends of the coolant tank are respectively provided with a liquid inlet and a liquid outlet. The coolant tank is provided therein with a plurality of fixed guide ribs that are arranged alternately and at intervals to form a continuous S-shaped or maze shaped channel for the coolant to flow through. The suspended guide ribs are further provided between the fixed guide ribs or between a fixed guide rib and an inner wall of the coolant tank.

There is provided a lubricating structure for a power transmission mechanism in which a crankshaft is coupled to a piston disposed in a cylinder bore and in which power is transmitted from the crankshaft to a camshaft. The lubricating structure includes: an idler gear that is configured to transmit power from the crankshaft to the camshaft; and an idler gear shaft that supports the idler gear via a bearing. One end portion of the idler gear shaft protrudes into the cylinder bore, and an oil passage configured to guide oil from the cylinder bore to the bearing is formed in the idler gear shaft.

The present document relates to an electric drive axle comprising an electric motor, a first planetary gear set, a second planetary gear set, and a differential assembly. The electric motor is drivingly connected or drivingly connectable to the differential assembly via the first planetary gear set and via the second planetary gear set.

A device for a vehicle including: a memory configured to store mapping data including machine learning data defining a mapping that uses an estimation variable that is a variable indicating a vehicle operation status of the vehicle and a detection value of a sensor detecting an oil temperature of a power transmission device as input variables, and uses an element corresponding to the input variables as an output variable; and a processor configured to: acquire the input variables; use the mapping to acquire the element as the output variable of the mapping corresponding to the input variables; and determine based on the element whether the detection value becomes equal to or higher than a threshold value due to occurrence of an abnormality in the power transmission device or a mode of vehicle operation by the driver of the vehicle.

A disclosed lubrication system for a turbofan engine includes a pump for driving lubricant through a lubrication circuit, at least one sensor generating a signal indicative of an engine operating condition and at least one valve for controlling a flow of lubricant through the lubrication circuit. A controller controls operation of the valve to vary the flow of lubricant based on the engine operating condition to maintain lubricant flow within predefined operating limits.