Hino Motors, Ltd.

Taiho Kogyo Co., Ltd.

Yoshiki Ihara

Shinya Nitta

Hiroshi Horiuchi

Shingo Iguchi

Katsumi Nakamura

Hisaki Toorisaka

A flow control valve in which corrosion is less likely to occur in the vicinity of a radial step portion in a gas passage of a housing and a method for manufacturing the same are provided. A flow control valve includes: a housing formed with a gas passage including a first cylinder member accommodating portion, a second cylinder member accommodating portion, and a radial step portion; a first cylinder member accommodated in the first cylinder member accommodating portion; a second cylinder member accommodated in the second cylinder member accommodating portion; and a valve body that is rotatably arranged inside the first cylinder member and the second cylinder member in the radial direction. The housing is formed of cast iron. At least surfaces of the first cylinder member and the second cylinder member are formed of a highly corrosion resistant material. At least one of a first axial end surface and a second axial end surface includes an opposing portion that opposes the radial step portion in the axial direction. A gas seal structure is arranged between the opposing portion and the radial step portion.

Flow control valve and method for manufacturing the same

A valve guide structure is provided which can suppress deterioration of a valve guide even if radial stress is applied on an upper portion of a stem of a valve. The valve guide structure is such that the stemof the valveis supported by an inner peripheral surface of the valve guideto restrict moving directions of the valve. A recessis formed on an inner peripheral surface of the valve guideand extends downwardly from an upper end of the valve guidealong the stemof the valveso as to provide a clearance between the valve guideand the stemof the valve

Valve guide structure

There are provided with a plurality of injection nozzles one ends of which are respectively inserted into a cylinder head every cylinder and other ends of which are covered with a cylinder head cover. A single common rail provided in parallel with a crankshaft is connected to a fuel injection pump through a first fuel pipe and connected to each injection nozzle through a plurality of second fuel pipes. The common rail is housed in the cylinder head cover, the front end of a first short pipe protruded from the common rail faces a first insertion portion formed in the sidewall of the cylinder head, and the first fuel pipe is connected to the first short pipe through the first insertion portion. Thereby, it is possible to decrease a fuel supply system using the common rail in weight and cost and improve the outside quality.

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Hino, Japan

Yoshiki Ihara