Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Naoto Tashiro

Yasuaki Jinnai

Hiroyuki Arimizu

Toru Hoshi

Kunihiro Tomikawa

Takeshi Yasoshima

A wastegate valve device according to at least one embodiment is a wastegate valve device disposed on a bypass passage bypassing a turbine of a turbocharger arranged on an exhaust gas passage of an engine, including: a valve seat surface formed at an outlet of the bypass passage; and a wastegate valve body which includes a support arm supported rotatably about an axis and a valve body supported by the support arm, the valve body being configured to come into and out of contact with the valve seat surface in accordance with rotation of the support arm. In the wastegate valve device according to at least one embodiment, the valve seat surface is inclined with respect to a direction orthogonal to an axial direction of the bypass passage, as viewed from a direction of the above-described axis.

Wastegate valve device, turbine, and turbocharger

A variable displacement exhaust turbocharger is provided with a plurality of nozzle vanes that are rotatably supported by a nozzle mount, a drive ring that is interlocked with an actuator and fits to a guide part of the nozzle mount, a lever plate having one end coupled to the drive ring and the other end coupled to the nozzle vane, and a variable nozzle mechanism that varies the vane angle of the nozzle vane by rotating the drive ring. A bulge suppressing portion is provided for absorbing bulging occurring on an outer peripheral surface of the guide part, the bulging being caused by the press-fitting of a nail pin into a press-fitting hole in a direction slightly toward the rotational axis with respect to the guide section and following the axial direction of the nozzle mount.

Variable displacement exhaust turbocharger equipped with variable nozzle mechanism

It is intended to provide a seal ring mounting method for a turbocharger and a turbocharger with the seal ring, whereby the seal ring is less likely to be affected by other parts. An annular protrusion () for restricting a position of a seal ring () in the radial direction is provided at a tip portion () of an inner peripheral wall () of a turbine housing (), and the seal ring () is mounted between a side surface () of a nozzle plate () and a first step portion () of the tip portion () of the inner peripheral wall () so that the outer periphery of the seal ring () is restrained by the annular projection ().

Seal ring mounting method for turbocharger, and turbocharger

A stopperis provided with: a nut-receiving partprovided on a heat insulation platethat is attached to an actuator bracket; and a movable-side stopper partprovided on an actuator rodthat moves in relation to the heat insulation plate. An actuatoris provided with an actuator bodythat generates driving force, and the actuator rodwhich transmits the driving force from the actuator body. The movable-side stopper partis provided on the actuator rodthat extends from the actuator bodyto the nozzle vane side.

Stopper structure for regulating opening degree of nozzle vane in turbocharger

It is provided with: a variable nozzle mechanism for regulating a flow of exhaust gas to a turbine rotor; a link mechanism for converting reciprocal displacement from an actuator that operates a variable nozzle mechanism into rotational displacement and transmitting the rotational displacement to an inner section of a bearing housing; and an engaging part for engaging an output section of the link mechanism and an input section of the variable nozzle mechanism, and the engaging part is constituted by a pin and a pin insertion slot where the pin is inserted, and a smooth surface is formed around an insertion position of the pin so as to guide a tip of the pin to the insertion position.

Variable displacement turbocharger and assembly method of variable nozzle mechanism

It is provided with: a variable nozzle mechanism section; an opening degree regulating memberfor regulating an angle of a nozzle vaneby bringing an outer peripheral surfaceof an inner cylinder of a bearing housingto which a nozzle mount is affixed and an inner peripheral surface of a lever plateinto contact; and a discharge recessfor discharging soot which accumulates in the gap between an inner peripheral end portion of the lever plate, the nozzle mount, and the bearing housingto the inner peripheral end portion of the lever plate

Opening degree regulating structure for variable nozzle mechanism and variable displacement turbocharger

It is intended to achieve weight reduction and production reduction of a nozzle mount for pivotably supporting a drive ring constituting a variable nozzle mechanism, and is characterized by: providing on an end face of a guide parta nail pinhaving a flange portion and being positioned so as to hold a drive ringof a variable nozzle mechanismto the guide partof a nozzle mountin the thrust direction, and setting the thrust-directional width of the drive ringsmaller than the width of the guide part, and providing an adjusting memberbetween the flange portion of the nail pinand the end face of the guide partto adjust a distance between the side face of the nozzle mount and the flange portion of the nail pin

Growing community of inventors

Tokyo, Japan

Naoto Tashiro