A shroud includes a first shroud that covers a first side face to which a muffler is adjacent among four side faces that an engine has, a second shroud that covers a second side face adjacent to the first side face and a third side face, and a third shroud that sections a muffler space for housing the muffler with the first shroud, the first shroud and the second shroud form an upstream side air guide path that makes cooling air flow around the engine, and the muffler space is connected to a downstream side of the upstream side air guide path.

An electric motor includes a housing, a shaft, a rotor, a stator, and at least one coolant supply channel. The shaft is rotatably mounted within the housing and has a longitudinal axis. The rotor is fixed to the shaft for rotation therewith. The stator is spaced apart from the rotor along the longitudinal axis of the shaft to yield at least one air gap between the stator and the rotor. The at least one coolant supply channel extends through at least one of the shaft and the stator and is configured to supply coolant flow to the at least one air gap.

An electric motor includes a housing, a shaft, a rotor, a stator, and at least one coolant supply channel. The shaft is rotatably mounted within the housing and has a longitudinal axis. The rotor is fixed to the shaft for rotation therewith. The stator is spaced apart from the rotor along the longitudinal axis of the shaft to yield at least one air gap between the stator and the rotor. The at least one coolant supply channel extends through at least one of the shaft and the stator and is configured to supply coolant flow to the at least one air gap.

An electric machine including a housing assembly including a first end and a second end, a stator, a rotor, and a fan is provided. The housing assembly includes a terminal box positioned at the first end, an end plate coupled to the terminal box and including a plurality of inlet apertures, and a casing coupled to the end plate and extending toward the second end. The stator is fixedly secured to the housing assembly and positioned within the casing. The rotor is rotatably secured to the housing assembly and positioned within the casing such that the stator and the rotor are separated within the casing by an air gap. The fan is positioned inside the casing and is configured to draw air into the housing assembly through the plurality of inlet apertures.

An electric machine including a housing assembly including a first end and a second end, a stator, a rotor, and a fan is provided. The housing assembly includes a terminal box positioned at the first end, an end plate coupled to the terminal box and including a plurality of inlet apertures, and a casing coupled to the end plate and extending toward the second end. The stator is fixedly secured to the housing assembly and positioned within the casing. The rotor is rotatably secured to the housing assembly and positioned within the casing such that the stator and the rotor are separated within the casing by an air gap. The fan is positioned inside the casing and is configured to draw air into the housing assembly through the plurality of inlet apertures.

A thermal management system for an electrical machine. The thermal management system has a housing circumferentially enclosing a bushing that has a tubular section. At least one fluid channel for a thermal medium is formed by channel walls within the housing and the bushing. A gap is provided or located between the tubular section of the bushing and the channel walls of the housing. The tubular section closes the at least one fluid channel off against a stator of the electrical machine, enabling a heat transfer between the stator and the thermal medium in the at least one channel across the tubular section of the bushing.

A thermal management system for an electrical machine. The thermal management system has a housing circumferentially enclosing a bushing that has a tubular section. At least one fluid channel for a thermal medium is formed by channel walls within the housing and the bushing. A gap is provided or located between the tubular section of the bushing and the channel walls of the housing. The tubular section closes the at least one fluid channel off against a stator of the electrical machine, enabling a heat transfer between the stator and the thermal medium in the at least one channel across the tubular section of the bushing.

The invention relates to a drive unit (1) with a housing (2), an electric motor (3) arranged therein, a transmission (8) coupled to the electric motor (3), at least two oil chambers (15, 16) arranged in the housing (2), which have oil zones (20, 21) and air zones (22, 23) and in which the oil zones (20, 21) are flow-connected to one another by an overflow channel (18). A pump (14) is flow-connected on its suction side with an oil zone (20) and passes oil through the oil chambers (15, 16). A pressure-equalization channel (30) opens into the air zones (22, 23) and flow-connects them to one another.

The invention relates to a drive unit (1) with a housing (2), an electric motor (3) arranged therein, a transmission (8) coupled to the electric motor (3), at least two oil chambers (15, 16) arranged in the housing (2), which have oil zones (20, 21) and air zones (22, 23) and in which the oil zones (20, 21) are flow-connected to one another by an overflow channel (18). A pump (14) is flow-connected on its suction side with an oil zone (20) and passes oil through the oil chambers (15, 16). A pressure-equalization channel (30) opens into the air zones (22, 23) and flow-connects them to one another.

A rotating electric machine includes a rotor rotatable about an axis, a stator, and a motor housing accommodating the rotor and the stator. The motor housing includes a refrigerant channel through which the refrigerant flows, and a pair of channel ports respectively located at both end portions of the refrigerant channel. The refrigerant channel includes a meander channel extending in a wave shape along the circumferential direction, and a pair of end channels connecting an end portion of the meander channel and a channel port. At least one of the end channels includes a first circumferential channel portion extending along the circumferential direction, a second circumferential channel portion extending along the circumferential direction and overlapping the first circumferential channel portion as viewed along the axis, and an axial channel portion extending along the axial direction and connecting the first circumferential channel portion and the second circumferential channel portion.