Ihi Corporation

Other

Masaru Nishioka

Naoki Tokue

Takafumi Ueda

Akira Iwakami

Yoshinari Yoshida

Satoru Furuta

Mikito Ishii

Nobuaki Sugiu

Ikuma Nishiguchi

A falsification prevention structure is to prevent falsification of the performance of a turbocharger. A bearing housing of the turbocharger has a flow rate adjustment screw which is operated to adjust a turbine flow rate of the turbocharger. The falsification prevention structure includes a cover member which is fastened to a flange portion of the bearing housing by a fixing bolt and which covers the flow rate adjustment screw, and a cap which is mounted in an irremovable manner with respect to the cover member and which blocks a bolt hole.

Prevention of performance falsification of a turbocharger

A variable nozzle unit is used in a turbine having a gas inflow passage which is sandwiched between a first flow passage wall surface and a second flow passage wall surface facing each other and through which a gas flowing from a scroll flow passage into a turbine impeller flows. The variable nozzle unit includes nozzle vanes, each of which is rotatably supported on both sides thereof by the first flow passage wall surface side and the second flow passage wall surface side and pivots about a pivotal axis parallel to the rotational axis of the turbine impeller in the gas inflow passage. An end face of the nozzle vane is formed with a cut face that is located closer to a leading edge than the pivotal axis, is cut out such that a gap between the cut face and the second flow passage wall surface is greater than other regions, and intersects the leading edge.

Variable nozzle unit and variable displacement-type turbocharger

A bottom surface of a housing recess of a turbine housing includes a close attachment portion in a continuous annular land shape, which is located radially outside a fitting recess. The close attachment portion is closely attached to a portion radially outside first support holes in a surface of a shroud ring opposite from its facing surface, by a fastening force of attachment bolts. The first support holes in the shroud ring communicate with an outlet side of a turbine impeller through a connection path and a cutout.

Variable geometry system turbocharger

Three or more attachment pins are arranged on a right lateral surface of a nozzle ring at intervals. All the attachment pins are placed outside support holes in the nozzle ring in radial directions of the nozzle ring. A guide ring is provided across right lateral surfaces of the attachment pins. A first side guide member to support a right lateral surface of a drive ring in away that allows the right lateral surface to be in sliding contact therewith is provided to the right of the guide ring. A second side guide member to support a left lateral surface of the drive ring in a way that allows the left lateral surface to be in sliding contact therewith is provided to the left of the guide ring.

Growing community of inventors

Tokyo, Japan

Masaru Nishioka