A fan shroud and a blower device are provided. The fan shroud includes a shroud wall surface and a plurality of ventilation openings. The shroud wall surface extends around a fan along a radial direction orthogonal to a rotation axis. The plurality of ventilation openings are formed through the shroud wall surface in a thickness direction of the shroud wall surface to allow passing of wind generated by a fan motor. A width of a wall surface side opening on a downstream side of the wind in the ventilation opening is smaller than a width of a lateral wall side opening on an upstream side of the wind in the ventilation opening.

A body structure includes a generally trough-shaped first structural member having a floor, two opposed side walls having respective top edges, and an open top along a length of the first structural member defining a generally U-shaped cross-section. The first structural member has a first portion with a first flow direction therethrough and a second portion with a second flow direction therethrough different from the first flow direction, the first portion having opposed first and second ends with a first opening in the first end, the second portion having opposed third and fourth ends with a second opening in the fourth end, wherein the second and third ends are in fluid communication with each other. The first portion has a first average depth and the second portion has a deepened portion having a second average depth larger than the first average depth.

A speed-sensitized type air duct apparatus includes an air duct having an internal space, an inlet at a front through which cooling air can be introduced, and an outlet at a rear through which the cooling air can be discharged. A guide extends across the internal space of the air duct in a front-rear direction. The guide has a number of air curtains configured to guide flow of the cooling air and having turning portions to change a flow direction of the cooling air, at some sections to decrease a flow rate of cooling air that is discharged to the outlet with the flow direction of the cooling air further changed as a flow speed of cooling air entering the inlet increases.

The present disclosure relates to a technology for reducing air resistance when a vehicle travels or cooling the inside of an engine room by being coupled to an air inlet of a grill. An active air flap apparatus for a vehicle includes a frame coupled to a rear surface of a grill, a lower flap member and an upper flap member each having rotatably fixed to the frame to open or close an air inlet disposed in the grill, and a link member connecting the lower flap member to an actuator to open or close the air inlet, in which upper ends of the lower flap member and the upper flap member are inclined in a rearward direction of the vehicle.

A shield assembly that may be disposed within an engine compartment of an agricultural vehicle, the shield assembly includes a plurality of shields that may block buildup of debris within the engine compartment. At least one shield of the plurality of shields includes a sloped surface that may direct debris away from the engine compartment. The shield assembly also includes a plurality of ducts formed between the plurality of shields. The plurality of ducts may redirect cooling fluid from a cooling fan package to the engine compartment to remove debris from within the engine compartment.

A containerised generator set comprises a generator arranged within a container having a first aperture through which cooling air is exhausted in use. A pair of first doors are arranged to pivot outwardly on either side of the first aperture, with a removable wall being removably mounted between the first doors and spaced apart from the body of the container by the first doors from its lower end region to its upper end region in its mounted position. The removable wall and the first doors define an exhaust air duct which preferably includes a sound absorbent material. The exhaust air duct extends for at least most of a total height of the body of the container to attenuate noise from the generator. Exhausted cooling air flows upwardly from the open upper end of the exhaust air duct and away from the immediate operating environment.

An engine assembly includes an engine compartment containing an internal combustion engine and a cooler compartment adjacent the engine compartment containing a heat exchanger. The engine and cooler compartments have an opening defined therebetween. A forced air system is operable to drive an airflow. A method for cooling the engine and its compartment is disclosed.

A heat storage cover is provided in an engine room. The heat storage cover covers an engine from above and surrounds the periphery of an upper portion of the engine to internally store, through the medium of air, heat dissipated from the engine and block upward heat dissipation. The engine includes an air inlet for introducing, into a combustion chamber, high temperature air obtained by the heat storage cover blocking the upward heat dissipation.

An engine cooling system comprising an exhaust enclosure formed in an engine compartment of a work machine. An exhaust processing system is situated within the exhaust enclosure. The exhaust enclosure is bounded in part by spaced upper and lower panels that are exposed to the ambient environment. At least one opening is formed in each panel. When an engine and fan also contained within the engine compartment are shut down, ambient air flows into the exhaust enclosure through the opening in the lower panel. The air flows around the exhaust processing system and back into the ambient environment through the opening formed in the upper panel.

An engine room heat exhausting structure configured to discharge heat from an engine room, is provided, which includes an engine room accommodating an engine with cylinders lined up in a front-and-rear direction of a vehicle, a wheelhouse provided outside the engine room in a vehicle width direction, an exhaust emission control device disposed between the engine and the wheelhouse, a wheelhouse liner configured to protect an inner wall of the wheelhouse, a discharging part provided rearward of the exhaust emission control device and configured to discharge into the wheelhouse a part of air cooled the exhaust emission control device, and a guiding part provided to the wheelhouse liner and configured to guide the air discharged into the wheel house to underneath the vehicle in a rear part of the wheelhouse.