The intake increasing device 100 pertaining to the present invention is for increasing air intake of an engine, and is provided with, a cylindrical wall part 20 having an intake inlet 20in and an intake outlet 20out, the wall part 20 leading intake air from the intake air inlet 20in to the intake air outlet 20out, an ejection port 30 for ejecting air F2 flowing along an inner circumferential surface 21 of the wall portion 20 to an air intake downstream side, the ejection port 30 being provided in the wall part 20; and a fan 40 for sending air to the ejection port 30.

A crawled vehicle comprising: an internal combustion engine; an engine compartment wherein the internal combustion engine is housed; an air inlet opening to catch air from the outside of the crawled vehicle; a first channel, for cold air, connected and fed by the air inlet opening with air coming from outside the crawled vehicle; a second channel to be fed with hot air coming from the internal combustion engine; a third channel for air, coupled to the internal combustion engine to feed the internal combustion engine with air; an air filter arranged along the third channel and upstream of the internal combustion engine; a connection element connected to the first channel, to the second channel and third channel; and an air adjusting device to adjust the air temperature in the third channel and comprising a shutter coupled to the first channel and/or to the second channel and/or to the connection element; and a control device controlling a position of the shutter to adjust the temperature of the air entering the third channel.

A snorkel system comprising: (a) a vehicle adapter configured to connect to a vehicle; (b) one or more air tubes configured to extend along an interior of an engine compartment of the vehicle; and (c) one or more angle adapters adapted to be located within the engine compartment of the vehicle, the one or more angle adapters fluidly connecting the vehicle adapter and the one or more air tubes together; wherein the one or more angle adapters include: an inlet opening located within a first plane, the inlet opening being located proximate to and in fluid communication with the vehicle adapter, and an outlet opening being in communication with a first end of the one or more air tubes, the outlet opening being located within a second plane that is spaced apart from and extends substantially parallel to the first angle adapter.

An apparatus and a system is provided that may be utilized to provide stability to air flow through a hood scoop. The present invention may also be utilized to straighten and smooth out air flow through a hood scoop and accompanying air filter media. The present invention utilizes an air filtration media which may be inserted into at least a portion of a vehicle hood scoop and may filter out particulate and may also slow air flow down temporarily in order to straighten and/or smooth turbulent air flow through the air filtration media. Additionally, the present invention may provide an apparatus that may facilitate more uniform pressure inside the hood scoop of the vehicle

An intake-air temperature controlling device for an engine is provided, which includes an engine body, an intake passage, an air intake part, an intake air temperature adjuster configured to adjust air temperature taken in through the air intake part to the passage, and a controller. An operating range in which the CI combustion is performed has a lean operating range in which A/F of mixture gas formed inside the cylinder, or G/F that is a relationship between the total weight G of gas inside the cylinder and a weight F of fuel fed to the cylinder is relatively low, and a rich operating range in which the A/F or G/F is relatively high. When the engine is in the lean operating range, the controller outputs a control signal to the intake air temperature adjuster so that the air temperature is increased, as compared in the rich operating range.

A vehicle that can realize measures for water exposure of intake ducts by a simple configuration is provided. The vehicle has a front seat, an engine and a continuously variable transmission at least partially located on a rear side of a front-end of the front seat and a bottom side of a lower end of the front seat, intake ducts at least partially extending from a rear side toward a front side on the bottom side of the lower end of the front seat, having intake ports in front-end portions, and sending outside air taken in from the intake ports to the continuously variable transmission, and a front cover covering both the front-end portions of the intake ducts, wherein the front-end portions of the intake ducts are located on a front side of the front-end of the front seat and a top side of the lower end of the front seat.

A vertically extending air intake duct on a rear of a cab in a delivery vehicle to take in ambient air for an engine through an air intake has a duct body as an outer shell with the air intake on an upper portion; a side branch section on a lower portion of the body and having upper and lower ends opened in the body and outside, respectively; a mesh member extending over the air intake to collect rainwater; a louver for covering the mesh member and the air intake to prevent intrusion of matter other than ambient air; and a drip channel or bead on an inner wall of the duct body and just below the mesh member to capture and guide rainwater flowing down on the inner wall to the upper end of the side branch section.

An air conduction system includes an air collecting chamber, a first air inlet, an additional air inlet, and a buoyancy body. Air is supplyable to the air collecting chamber by said air inlets. The first air inlet has an air control valve via which the air inlet is selectively closed. The additional air inlet has an additional air control valve via which the additional air inlet is selectively closed. A buoyancy body is provided which is movable via a geodetically rising water level and which is operatively connected to a closure element of the air control valve of the first air inlet. The closure element is convertible from an open state, in which the first air inlet is fluidically connected to the air collecting chamber, into a closed state, in which said fluidic connection is interrupted, when the water level rises. The closure element comprises the buoyancy body.

An air intake structure for a saddled vehicle including a downsized air cleaner box and a sufficient intake path is provided. An air intake structure for a saddled vehicle applied to a saddled vehicle including an engine suspended from a vehicle body frame and an air cleaner box disposed behind the engine includes: a side cover mounted on a sidewall on an outer side in the vehicle width direction of the air cleaner box; and a side cover opening formed at the side cover toward the vehicle rear side. Outside air to be taken into the air cleaner box is taken from the side cover opening. The sidewall is provided with an intake opening, and the intake opening is covered with the side cover. The side cover includes a body that covers the sidewall, and a canopy member provided at the surface of the body. The side cover opening is formed of the outer edge of the canopy member.

A method for manufacturing a waterproof felt duct may include (a) laminating a waterproof film on one side of a first nonwoven fabric and laminating a second nonwoven fabric on the waterproof film laminated on the first nonwoven fabric to form a laminated body; (b) forming a waterproof felt base material by thermally adhering the laminated body; (c) cutting the waterproof felt base material into a desired shape; (d) molding a duct while surrounding the waterproof felt base material cut into the desired shape around the external surface of a molding jig having a worm gear shape; (e) heat-treating the molded duct; (f) cooling the heat-treated duct; and (g) ejecting the cooled duct from the molding jig.