Abstract: 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.

Abstract: 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.

Abstract: 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 (12j) for restricting a position of a seal ring (16) in the radial direction is provided at a tip portion (12h) of an inner peripheral wall (12b) of a turbine housing (12), and the seal ring (16) is mounted between a side surface (36c) of a nozzle plate (36) and a first step portion (12k) of the tip portion (12h) of the inner peripheral wall (12b) so that the outer periphery of the seal ring (16) is restrained by the annular projection (12j).

Abstract: 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.

Abstract: A stopper 30 is provided with: a nut-receiving part 44a provided on a heat insulation plate 44 that is attached to an actuator bracket 43; and a movable-side stopper part 33 provided on an actuator rod 26 that moves in relation to the heat insulation plate 44. An actuator 27 is provided with an actuator body 41 that generates driving force, and the actuator rod 26 which transmits the driving force from the actuator body 41. The movable-side stopper part 33 is provided on the actuator rod 26 that extends from the actuator body 41 to the nozzle vane side.

Abstract: 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.

Abstract: It is provided with: a variable nozzle mechanism section 23; an opening degree regulating member 43 for regulating an angle of a nozzle vane 19a by bringing an outer peripheral surface 41 of an inner cylinder of a bearing housing 13 to which a nozzle mount is affixed and an inner peripheral surface of a lever plate 33 into contact; and a discharge recess 47 for discharging soot which accumulates in the gap between an inner peripheral end portion of the lever plate 33, the nozzle mount 21, and the bearing housing 13 to the inner peripheral end portion of the lever plate 33.

Abstract: 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.

Abstract: 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 part 5a a nail pin 20 having a flange portion and being positioned so as to hold a drive ring 3 of a variable nozzle mechanism 100 to the guide part 5a of a nozzle mount 5 in the thrust direction, and setting the thrust-directional width of the drive ring 3 smaller than the width of the guide part 5a, and providing an adjusting member 20c between the flange portion of the nail pin 20 and the end face of the guide part 5a to adjust a distance between the side face of the nozzle mount and the flange portion of the nail pin 20.

Abstract: 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 (12j) for restricting a position of a seal ring (16) in the radial direction is provided at a tip portion (12h) of an inner peripheral wall (12b) of a turbine housing (12), and the seal ring (16) is mounted between a side surface (36c) of a nozzle plate (36) and a first step portion (12k) of the tip portion (12h) of the inner peripheral wall (12b) so that the outer periphery of the seal ring (16) is restrained by the annular projection (12j).

Abstract: It is provided with: a variable nozzle mechanism section 23; an opening degree regulating member 43 for regulating an angle of a nozzle vane 19a by bringing an outer peripheral surface 41 of an inner cylinder of a bearing housing 13 to which a nozzle mount is affixed and an inner peripheral surface of a lever plate 33 into contact; and a discharge recess 47 for discharging soot which accumulates in the gap between an inner peripheral end portion of the lever plate 33, the nozzle mount 21, and the bearing housing 13 to the inner peripheral end portion of the lever plate 33.

Abstract: 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 part 5a a nail pin 20 having a flange portion and being positioned so as to hold a drive ring 3 of a variable nozzle mechanism 100 to the guide part 5a of a nozzle mount 5 in the thrust direction, and setting the thrust-directional width of the drive ring 3 smaller than the width of the guide part 5a, and providing an adjusting member 20c between the flange portion of the nail pin 20 and the end face of the guide part 5a to adjust a distance between the side face of the nozzle mount and the flange portion of the nail pin 20.

Abstract: A stopper 30 is provided with: a nut-receiving part 44a provided on a heat insulation plate 44 that is attached to an actuator bracket 43; and a movable-side stopper part 33 provided on an actuator rod 26 that moves in relation to the heat insulation plate 44. An actuator 27 is provided with an actuator body 41 that generates driving force, and the actuator rod 26 which transmits the driving force from the actuator body 41. The movable-side stopper part 33 is provided on the actuator rod 26 that extends from the actuator body 41 to the nozzle vane side.

Abstract: 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.

Abstract: 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.