Ishikawajima-harima Heavy Industries Co., Ltd.

Mazda Motor Corporation

Ishikawajima-harima Jukogyo Kabushiki Kaisha

Nissan Motor Company Limited

Yoshiyuki Miyagi

Shigeru Takabe

Tsuyoshi Goto

Tatsuya Fujii

Hidetsugu Matsubara

Masahiro Makita

Masayoshi Sasaki

Mitsushi Maeyama

Koichi Hatamura

Kaoru Kaneko

Hiroyuki Sugimoto

Izuho Hirano

Yuichi Iguchi

Takamitsu Tokuoka

Yuichiro Mizuno

Seishiro Takayama

Moena Hori

Yasuo Tanaka

Out of combinations of three pins() and bushes(-), a clearance between one of the bushes() and the pin() is small, and a clearance between the other two bushes() and the pins() are large, whereby torque transmission is always performed by only one pin() and the bush() during rotation to avoid a transfer phenomenon between the pins. Disposing the pins and the bushes at an equal interval allows a good balance of rotation to provide an easy assembly.

Rotating shaft coupling

A method for manufacturing a supercharger rotor by casting a profile portion of a supercharger rotor and a shaft penetrating the same, having the steps of: first cutting a left and right helical cross portion on a surface of the shaft connected to the profile portion, wherein the cross portion includes a right handed helical groove and a left handed helical groove, and these grooves cross each other; and casting the profile portion around the shaft in die-casting. In this way, a plurality of profile portion divided metal molds surround a profile portion and end metal molds surround both rotor ends. A helical core is attached to one end mold to pass through the profile portion. A rotor-shaped cavity forms inside the molds. Hot metal is pressurized, injected and solidified in the cavity, and the end mold having the helical core is pulled out by rotation along a helical line.

Method and apparatus for manufacturing supercharger rotor

A plurality of profile portion divided metal molds surround a profile portion of a supercharger rotor to allow division. A pair of end metal molds and surround both ends of the rotor. A helical core is attached to one end metal mold so as to be helically passed through the profile portion of the rotor. A rotor-shaped cavity is formed inside by the profile portion divided metal molds, and the end metal molds. Hot metal is pressurized, and injected and solidified in the cavity. Then, the end metal mold having the helical core is pulled out by being rotated along a helical line.

A supercharger arrangement for a vehicle engine equipped with a screw supercharger. A bypass pipe extends from a main body of the screw supercharger to an upstream intake air pipe such that part of the intake air compressed to a certain extent in the supercharger returns to an inlet of the supercharger. A duty solenoid valve is connected to the bypass pipe for controlling a flow rate of the air returning to the inlet of the supercharger through the bypass pipe. The screw supercharger is originally designed to match a low speed condition and to feed an excessive amount of air at a high speed condition. The solenoid valve allows the intake air to return to the upstream intake air pipe through the bypass pipe from the supercharger when the engine is operated at a high speed condition so that an excessive amount of air is not supplied to the engine.

Screw supercharger for vehicle

A pulley assembly for a driven shaft is disclosed. The pulley assembly includes a pulley to which a turning force is transferred from a driving unit; a sleeve fixedly mounted to a casing of the driven unit through which the driven shaft passes with a clearance between an outer periphery of the driven shaft and an inner periphery of the sleeve; a bearing structure for bearing the pulley rotatably about an axis of the driven shaft, the bearing structure being disposed between the pulley and the sleeve; and a torque transferring structure for transferring the turning force transferred to the pulley to the driven shaft, the torque transferring structure being interposed between the pulley and the driven shaft.

Pulley assembly for driven shaft

In a lysholm compressor having intermeshing male and female rotors rotated in a casing to compress an axially flowing gas, discharge-side shafts of the rotors are borne by discharge-side bearings to fix the discharge-side shafts in thrust direction while suction-side shafts of the rotors are borne by suction-side bearings to allow the suction-side shafts to move in the thrust direction. Clearances of the rotors to the casing are properly set or selected.

Bearing support for a lysholm compressor

Lubricating device for engine-driven supercharger

Growing community of inventors

Ichikawa, Japan

Yoshiyuki Miyagi