A fracturing device, including a power unit, wherein the power unit comprises a muffling compartment, a turbine engine, an air intake unit, and a starter; the air intake unit is communicated with the turbine engine through an intake pipe, and configured to provide a combustion-supporting gas to the turbine engine; the air intake unit is located at the top of the muffling compartment, the muffling compartment comprises an accommodation space, the turbine engine and the starter are located in the accommodation space, and the starter is configured to start the turbine engine, the starter comprises a first electric motor.

A fracturing device includes a power unit, and the power unit includes a muffling compartment, a turbine engine, and an air intake unit. The air intake unit is communicated with the turbine engine through an intake pipe and configured to provide a combustion-supporting gas to the turbine engine; the air intake unit is at a top of the muffling compartment and the muffling compartment has an accommodation space, the turbine engine is within the accommodation space. A fan is further provided to generate wither positive pressure or negative presser in the muffling compartment to facilitate a cooling of the turbine engine.

A cooling device for a rotating machine that is to be provided in a vehicle. The cooling device includes: (a) an electric oil pump; (b) a control device configured to control operation of the electric oil pump; (c) a cooling oil passage for applying oil outputted by the electric oil pump, to a coil of the rotating machine. The control device is configured to control the operation of the electric oil pump, depending on a pressure difference between a predetermined pressure reference value and an atmospheric pressure value that is detected by an atmospheric pressure sensor.

A marine engine has a crankshaft that rotates about a crankshaft axis; a crankcase supporting the crankshaft, the crankcase being made primarily of a first material; and a cover on the crankcase. The cover includes a heat exchanger having an inner plate facing an interior of the crankcase, and the inner plate is located such that rotation of the crankshaft causes lubricant in the crankcase to impinge upon the inner plate. The cover also includes a frame holding the heat exchanger and isolating the heat exchanger from direct contact with the crankcase. At least a portion of the frame is made of a second material that is more compliant than the first material.

An oil cooling structure of an engine is provided that is capable of enhancing cooling performance of oil while preventing an increase in number of components or an increase in required space from being involved as much as possible. In an oil cooling structure of an engine in which a transmission case is attached to one end wall of an engine body, and a transmission mechanism for an accessory drive is provided in the transmission case, the transmission case is formed into a potlid-shaped body having a plurality of rib walls along a front-rear direction, and is attached to an engine front wall with an engine cooling fan, and case inner chamber portions partitioned by the rib walls in the transmission case are configured as a transporting passage of oil circulated by an oil pump.

A cooling system for a utility vehicle comprises a first fluid circuit including a first fluid such as hydraulic oil and a second fluid circuit including a second fluid such as a coolant or lubricant. A heat exchanger couples the first and second fluid circuits enabling transfer of heat from one of the first and second fluids to the other. A fluid cooler in the first fluid circuit has a fan arranged to direct an airflow towards it, which fan is a hydraulically driven device connected in the first fluid circuit and driven by flow of the first fluid.

A heat exchanger apparatus having a first fluid channel, a second fluid channel, a bypass channel, and inlet and outlet manifolds. A thermal bypass valve assembly is positioned within the inlet manifold, and contains an outer sleeve having a first, second and third apertures axially displaced. An inner sleeve positioned within the outer sleeve and moveable from a first to a second position upon actuation of a first actuator. The inner sleeve has a first orifice on a wall of the inner sleeve and a second orifice defined by the inner sleeve second end. The first orifice aligns with the first aperture in the first position and the second aperture in the in the second position. A second actuator coupled to a stopper that engagingly disengages from the second orifice upon actuation of the second actuator.

A standby generator includes an internal combustion engine, an alternator driven by the internal combustion engine to produce electrical power for distribution from the standby generator, and an adaptor component comprising a first end coupled to the engine and a second end spaced apart from the first end and coupled to the alternator. The adaptor component may be positioned such that the internal combustion engine is on a first side thereof and the alternator is on a second side thereof. An air-cooled oil cooler may be integrated with or affixed to the adapter component and include cooling fins formed on an outer surface thereof, the air-cooled oil cooler fluidly connected to the internal combustion engine to receive heated oil therefrom and return cooled oil thereto.

An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed includes comprising a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio, and an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold.

A lubricant pan for a vehicle includes a receiving region in which a lubricant is at least temporarily receivable, a first wall element, and a second wall element. A temperature-control channel is disposed between the first wall element and the second wall element and a temperature-control medium is flowable through the temperature-control channel. A core that is porous and permeable to the temperature-control medium is disposed in the temperature-control channel between the first wall element and the second wall element. The temperature-control medium is introducible into the temperature-control channel via a first connector and the temperature-control medium is dischargable from the temperature-control channel via a second connector.