A gas turbine engine component having a cooling passage includes a first wall defining an inlet of the cooling passage, a second wall generally opposite the first wall and defining an outlet of the cooling passage, a metering section extending downstream from the inlet, and a diffusing section extending from the metering section to the outlet. The metering section includes an upstream side and a downstream side generally opposite the upstream side. At least one of the upstream and downstream sides includes a first passage wall and a second passage wall where the first and second passage walls intersect to form a V-shape.

A motor assembly having a rotational axis includes a motor housing comprising a plurality of cooling openings extending therethrough and defining a chamber. The motor assembly also includes a stator fixedly coupled to the motor housing and positioned within the chamber. A rotor is coupled to at least one of the motor housing and the stator, wherein the rotor is configured to rotate about the axis and is positioned within the chamber. The motor assembly includes a fan having a first inlet side on a first axial side of the fan and a second inlet side on a second, opposing, axial side of the fan. The fan is configured to draw cooling air in a first direction through the at least one cooling opening into the first inlet side, and the fan is also configured to draw cooling air in a second, opposite direction into the second inlet side.

A compressor or pump stage is provided. The compressor or pump stage at least comprising a central shaft (8) and one rotor (3), where the axis of rotation of the rotor (3) is the central shaft (8) and where the rotor comprises a number, n, of rows of impellers (5) arranged at an outer perimeter of the rotor with an axial distance between neighbouring rows of impellers (5), where n={2, 3, 4...}.

A control system that uses an algorithm to control the fan speed in a cooling system for an engine is disclosed. The algorithm is adapted to maintain a cooling medium at a set temperature instead of an operating temperature range of the cooling medium. The algorithm is also adapted to maintain a cooling medium at a set temperature and to build a cooling safety margin in response to an engine output torque percentage that is below an output torque percentage setpoint.

An e-charger includes a motor case that encases the motor and an outer housing that houses the motor case. The e-charger additionally includes a cooling system with passages cooperatively defined by the outer housing and the motor case. First and second longitudinal passages extend between the first and second ends of the motor, and a second longitudinal passage extends between the second and first ends of the motor. The end passage fluidly connects the first and second longitudinal passage. The cooling system is configured for directing flow of the coolant from the inlet, through the first longitudinal passage in a first longitudinal direction with respect to the axis, through the end passage, and back through the second longitudinal passage in a second longitudinal direction with respect to the axis.

An e-charger includes a motor case that encases the motor and an outer housing that houses the motor case. The e-charger additionally includes a cooling system with passages cooperatively defined by the outer housing and the motor case. First and second longitudinal passages extend between the first and second ends of the motor, and a second longitudinal passage extends between the second and first ends of the motor. The end passage fluidly connects the first and second longitudinal passage. The cooling system is configured for directing flow of the coolant from the inlet, through the first longitudinal passage in a first longitudinal direction with respect to the axis, through the end passage, and back through the second longitudinal passage in a second longitudinal direction with respect to the axis.

A variable geometry turbocharger according to an embodiment includes a rotational shaft; a turbine wheel disposed on one end side of the rotational shaft; a compressor wheel disposed on another end side of the rotational shaft; a bearing housing for housing a bearing part for rotatably supporting the rotational shaft; a variable nozzle structure for controlling a flow rate of an exhaust gas flowing into the turbine wheel, the variable nozzle structure including a nozzle plate and nozzle mount that define an exhaust gas flow passage for allowing the exhaust gas to flow into the turbine wheel, a nozzle vane disposed rotatably about a support shaft in the exhaust gas flow passage, and a drive part for rotating the nozzle vane, the drive part being disposed in an internal space defined between the bearing housing and the nozzle mount; and a cooling gas passage for extracting compressed gas compressed by the compressor wheel and introducing the compressed gas into the internal space.

A handheld fan includes a housing, a fan assembly mounted in the housing and close to a rear portion of the housing, a semiconductor chilling plate mounted in the housing and arranged in front of the fan assembly, and a cold conducting piece arranged on a front end of the housing. A front end surface of the semiconductor chilling plate is a cooling surface. The cold conducting piece is attached to the front end surface of the semiconductor chilling plate. An air outlet is defined between the cold conducting piece and the housing.

An electric coolant pump (1) conveys cooling fluid in order to cool a combustion engine of a vehicle. The electric coolant pump (1) has a pump impeller (2) for accelerating the coolant to be conveyed, a rotor shaft (3) on which the pump impeller (2) is fixed, an electric motor (6), having a stator (8) and a rotor (7), for driving the rotor shaft (3). A control circuit (13) controls the electric motor (6). A pump housing (10) accommodates at least the control circuit (13) and the electric motor (6). The coolant to be conveyed is able to flow through the pump housing (10). The coolant to be conveyed thereby flows around the stator (8), the rotor (6) and the control circuit (13).

A motor assembly has a motor having a rotor and a stator. An impeller is connected to a rotary shaft of the rotor and a housing is disposed between the impeller and the motor and surrounding an upper side of the motor. A diffuser discharges air, which is suctioned by the impeller, along an outer surface of the housing. A heat dissipation cover covers an outer surface of the motor. The heat dissipation cover includes an inner cover spaced apart from the outer surface of the motor and forming an inside-cover flow channel that air flows through and an outer cover having a diameter greater than that of the inner cover and forming an outside-cover flow channel through which air flows along the outer surface thereof.