Dual poppet wastegate with dual coaxial shafts

Details Dual poppet wastegate with dual coaxial shafts Dual poppet wastegate with dual coaxial shafts

1998-03-02

1999-12-07

Kamen, Noah P.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

F02D 2300

Patent

active

059963484

ABSTRACT:
An improved wastegate valve for turbochargers having bifurcated exhaust gas inlets includes a first bypass port communicating with a first portion of the exhaust inlet, a first poppet which engages and seals a seat surrounding the first port, a second bypass port communicating with a second portion of an exhaust inlet, and a second poppet which engages and seals a seat surrounding the second port. Actuation of the poppets is accomplished by a first substantially tubular shaft supported for rotation about an axis and having a central bore and a second substantially tubular shaft extending through the central bore of the first shaft and supported therein for rotation about the axis. The two shafts are concurrently rotated by a lever arm which is connected to the first shaft, at an opposite end to the radial arm, with a weld bead which extends across the end face of the first shaft, the bore, and a coplanar end of the second shaft.

REFERENCES:
patent: 4530640 (1985-07-01), MacInnes
patent: 4893474 (1990-01-01), Miller et al.
patent: 5046317 (1991-09-01), Satokawa

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