Turbocharger with sliding piston, and having vanes and...

Details Turbocharger with sliding piston, and having vanes and... Turbocharger with sliding piston, and having vanes and...

2008-03-28

2011-12-06

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

C415S165000

Reexamination Certificate

active

08070425

ABSTRACT:
A turbocharger having a sliding piston for regulating exhaust gas flow into the turbine wheel includes a set of first vanes mounted on a fixed first wall of the turbine nozzle and projecting axially toward an opposite second wall of the nozzle, and/or a set of second vanes mounted on the end of the piston and projecting in an opposite axial direction toward the first wall of the nozzle. For the/each set of vanes, there are leakage dams formed on the wall that is adjacent the vane tips when the piston is closed. The leakage dams are closely adjacent the vane tips and discourage exhaust gas from leaking in a generally radial direction past the vane tips as the piston just begins to open from its fully closed position.

REFERENCES:
patent: 5178516 (1993-01-01), Nakagawa et al.
patent: 5231831 (1993-08-01), Leavesley
patent: 6726447 (2004-04-01), Lutz
patent: 7810327 (2010-10-01), Parker

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