An engine includes a cylinder head having a first face defining an entrance to an intake port, and an intake manifold having a second face defining an outlet from a runner. The first and second faces mate to fluidly connect the entrance and the outlet, and an area mismatch or offset exists between the entrance and the outlet. A tongue is positioned into the intake port to extend over a floor of the intake port and has an area substantially equal to a difference between the entrance area and the outlet area. The tongue maintains in-charge motion and mixing of intake gases in-cylinder in the engine.

An intake apparatus of a V-type internal combustion engine including first cylinders arranged along a first direction in a first bank and second cylinders arranged along the first direction in a second bank, the intake apparatus includes a surge tank, first branch paths, second branch paths, and a protrusion. The surge tank is provided above the first and second banks. The surge tank includes a lower wall, an air inlet, first air outlets, and second air outlets. The first air outlets are arranged along the first direction in the lower wall. The second air outlets are arranged along the first direction in the lower wall. The first branch paths connect the first outlets to the first cylinders. The second branch paths connect the second outlets to the second cylinders. The protrusion is provided on the lower wall between a closest first air outlet and a closest second air outlet.

This multi-cylinder engine intake structure is provided with a fresh air distribution chamber into which a plurality of fresh air distribution openings communicating with the individual intake ports are opened, and a gas collection chamber. The gas collection chamber includes a communication region into which a first communication opening communicating with the fresh air distribution chamber is opened, a first mixture region into which an air inlet and an EGR gas inlet are opened and which is positioned upstream of the communication region in a flow direction of a mixture gas of air and EGR gas, and a second mixture region positioned downstream of the communication region in the flow direction of the mixture gas.

A system for facilitating a visual inspection of an All-Terrain Vehicle (ATV) is provided. The system includes a transparent air box cover and an electrical system outputting light from the air box cover lid. The system may include a transparent intake/inlet valve cover lid, a transparent exhaust/outlet valve cover lid, and a transparent cylinder head cover lid.

A cooling device includes a surrounding member, an air inlet, an air outlet, and a flow-path-formation mechanism. The surrounding member is configured to surround an engine. The air inlet is formed in the surrounding member. The air outlet is formed in the surrounding member and is to be coupled to an intake pipe of the engine. The flow-path-formation mechanism is configured to form a flow path that allows outside air to circulate to the air outlet from the air inlet when a temperature of the engine or a temperature inside the surrounding member is greater than or equal to a predetermined temperature.

A pair of engine mounting brackets for an All-Terrain Vehicle (ATV) is provided. The engine mounting bracket includes the following: a first portion having a mitten shape; a hole in a fingertip portion of the mitten shape; a hole in a thumb portion of the mitten shape; a second portion parallel to the first portion; a middle portion interconnecting the first portion and the second portion at first and second interfaces, respectively, the middle portion being oriented transversely relative to the first and second portions wherein the first portion and the second portion are parallel to each other; and a middle hole in the middle portion just downward of the first interface, wherein the first portion, the second portion, the holes of the first portion and the middle hole being mirror images of each other relative to each engine mounting bracket of the pair though not the middle portions.

A system for facilitating a visual inspection of an All-Terrain Vehicle (ATV) is provided. The system includes a transparent air box cover and an electrical system outputting light from the air box cover lid. The system may include a transparent intake/inlet valve cover lid, a transparent exhaust/outlet valve cover lid, and a transparent cylinder head cover lid.

A sleeve structure comprises a plurality of sleeve main bodies fitted respectively into intake ports of a cylinder head of a multi-cylinder internal combustion engine and a shared base provided on one end of the plurality of sleeve main bodies. By fixing this sleeve structure to the cylinder head, an amount of labor involved in a fixing operation for fixing sleeves to a cylinder head is reduced.

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.

A pair of engine mounting brackets for an All-Terrain Vehicle (ATV) is provided. The engine mounting bracket includes the following: a first portion having a mitten shape; a hole in a fingertip portion of the mitten shape; a hole in a thumb portion of the mitten shape; a second portion parallel to the first portion; a middle portion interconnecting the first portion and the second portion at first and second interfaces, respectively, the middle portion being oriented transversely relative to the first and second portions wherein the first portion and the second portion are parallel to each other; and a middle hole in the middle portion just downward of the first interface, wherein the first portion, the second portion, the holes of the first portion and the middle hole being mirror images of each other relative to each engine mounting bracket of the pair though not the middle portions.