A two-wheeled vehicle includes a frame having a front frame portion, a mid-frame portion, and a rear frame portion. The mid-frame portion is coupled to the rear frame portion and the front frame portion. The vehicle further includes a plurality of ground-engaging members for supporting the frame. The front frame portion is removably coupled to the mid-frame portion with a plurality of frame members extending between the front frame portion and the mid-frame portion.

A cover covering an engine and an intake duct for introducing fresh air outside an engine room into a combustion chamber of the engine are provided in the engine room. The cover includes a top face cover portion covering the engine from above, and a side face cover portion covering the engine from the lateral side. The intake duct is disposed so as to be continuous to a side edge of the side face cover portion such that the intake duct covers the engine from the lateral side together with the side face cover portion.

A vehicle including an air intake system for an engine component includes a vehicle frame including one or more frame components, at least one of the one or more frame components includes an engine air passage and at least one intake port in communication with the engine air passage. At least one duct port of the frame component is in communication with the engine air passage. An engine component is coupled with the vehicle frame, and an intake duct extends from the at least one duct port to the engine component.

An outboard motor including an internal combustion engine for propelling a ship is equipped with an air-guiding system using a covering hood surrounding surfaces of the internal combustion engine and auxiliary units. The covering hood is provided with airflow inlet and outlet openings in its interior, and a fan driven by the internal combustion engine influences airflows in the covering hood. An air-guiding system includes channeling devices for partial air flows. First partial air flows are fed as intake air to an engine intake system, and second partial air flows act, with the aid of the fan, on surfaces of the internal combustion engine and the auxiliary units heated by operation of the internal combustion engine. The heated airflows are conveyed by the fan and a third channeling device as exhaust air via an outlet opening in the covering hood outside of the covering hood or into the atmosphere.

An internal combustion engine for an outboard motor for driving a vessel has an air guide system acting by way of a covering hood surrounding surfaces of the internal combustion engine and ancillary units. Covering hood inlet and outlet openings permit airflows to move in an interior space of the covering hood, and a fan driven by the internal combustion engine influences the airflows in the covering hood interior space. Airflows enter the interior space of the covering hood via an inlet opening and a first routing arrangement. Assisted by the fan, part of the airflows acts on the surfaces of the internal combustion engine and of the ancillary units. A second routing arrangement routs another portion of the airflows, as intake air, to an engine suction system. Airflows heated by engine and ancillary unit surfaces are conveyed by the fan and a third routing arrangement outside the covering hood.

Examples of the present disclosure describe systems and methods for determining a state of an air diverter valve of an air induction system of a vehicle. The determined state of the air diverter valve may be based on an intercooler-based estimated ambient air temperature and a comparison between an ambient air temperature sensor value and a pre-compressor sensor value.

Examples of the present disclosure describe systems and methods for determining a state of an air diverter valve of an air induction system of a vehicle. The determined state of the air diverter valve may be based on an intercooler-based estimated ambient air temperature and a comparison between an ambient air temperature sensor value and a pre-compressor sensor value.

An air cleaner includes a filter element, a case having an opening and being configured to accommodate the filter element, and a lid configured to close the opening. The case includes a wall including a first surface and a second surface that are formed on at least one of an outer surface and an inner surface of the case and are continuous with each other in an opening direction of the opening through intermediation of a stepped portion. The case further includes a rib formed on at least one of the first surface and the second surface to extend in the opening direction.

In a saddle-ride type vehicle in which an intake device is arranged at a position covered by a fuel tank from above, the intake device including: an air cleaner; a connecting tube having an upstream end thereof connected to the air cleaner; a throttle device including a throttle valve and connected to a downstream end of the connecting tube; and a resonator, a curved portion bulged upward and curved in a chevron shape is formed in the connecting tube, and the resonator arranged between the fuel tank and the connecting tube is connected to the connecting tube on the air cleaner side further than a top portion of the curved portion as seen in a side view of the vehicle.

An air intake assembly arranged in an engine compartment of an automotive vehicle and configured for directing air into a throttle body of an engine of the vehicle is provided. The air intake assembly includes an air intake duct and an air jacket. The air intake duct is configured to direct air from an inlet duct to the throttle body. The air jacket is arranged around the air intake duct. The air jacket has a first air jacket opening and a second air jacket opening. The air jacket forms an air gap between the air jacket and the air intake duct. Air flowing through the air jacket from one of the first and second air jacket openings to the other of the first and second air jacket openings cools the air intake duct thereby reducing a temperature of air directed from the intake duct into the throttle body.