Variable-nozzle mechanism, exhaust turbocharger equipped...

Details Variable-nozzle mechanism, exhaust turbocharger equipped... Variable-nozzle mechanism, exhaust turbocharger equipped...

2003-10-17

2008-07-08

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

C415S164000, C415S165000, C029S889200

Reexamination Certificate

active

07396204

ABSTRACT:
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.

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