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AssigneeMitshubishi Heavy Industries, Ltd.
InventorsTakashi Shiraishi, Yasuaki Jinnai, Motoki Ebisu
Estimating the term…
An exhaust turbocharger with a variable-nozzle mechanism with fail-safe feature included is provided with which, even if wear of the drive ring supporting part where the supporting elements are in reciprocating sliding or rolling contact with each other under high temperature without lubrication increases, the drive ring can be supported on the nozzle mount on the second supporting part, which enables the drive ring to be always supported rightly on the nozzle mount, and to prevent the occurrence of eccentric rotation or dropping out of the drive ring due to excessive wear of the drive ring supporting part or the occurrence of reduction in engine performance due to malfunctions of the variable-nozzle mechanism such as the error in the relation between the output of the actuator and the nozzle vane opening or the occurrence of breakage of the variable-nozzle mechanism as has been experienced in prior arts.
A variable-nozzle mechanism of an exhaust turbocharger in which a driving force of an actuator is transmitted to nozzle vanes supported for rotation by a nozzle mount to vary an angle of a blade of the nozzle vanes, wherein the variable-nozzle mechanism is arranged such that a nozzle plate having an annular shape is connected to said nozzle mount by means of a plurality of nozzle supports located circumferentially between the nozzle vanes, and a drive ring is provided at a side of the nozzle mount opposite to the nozzle vanes in an axial direction of the turbocharger so that an axial position of said drive ring is restricted by thrust bearing elements attached to said nozzle mount, the variable-nozzle mechanism being constructed as a variable-nozzle mechanism assembly which can be incorporated to or removed from the turbocharger.
An exhaust turbocharger with a variable-nozzle mechanism in which a driving force of an actuator is transmitted via a drive ring to nozzle vanes supported for rotation by a nozzle mount to vary an angle of a blade of the nozzle vanes, wherein said variable-nozzle mechanism is arranged such that a nozzle plate having an annular shape is connected to said nozzle mount by means of a plurality of nozzle supports located circumferentially between the nozzle vanes, and said drive ring is provided at a side of the nozzle mount opposite to the nozzle vanes in an axial direction of the turbocharger so that an axial position of said drive ring is restricted by thrust bearing elements attached to said nozzle mount, the variable-nozzle mechanism being constructed as a variable-nozzle mechanism assembly, the variable-nozzle mechanism assembly is mounted to a bearing housing by centering location with an inner circumferential face of the nozzle mount to determine a radial position thereof, a turbine casing is mounted to the nozzle mount by centering location with an outer circumferential face of the nozzle mount, and an axial position of the variable-nozzle mechanism assembly is defined between the bearing housing and turbine casing by respective side parts, the variable-nozzle mechanism being able to be incorporated to or removed from the turbocharger.
A method of manufacturing an exhaust turbocharger with a variable-nozzle mechanism in which a driving force of an actuator is transmitted via a drive ring to nozzle vanes supported for rotation by a nozzle mount to vary an angle of a blade of the nozzle vanes, the method comprising:
Dependencies are inferred from the claim text.