Turbine wastegate

Patent metadata

Field	Value
Publication number	US-9556786-B2
Application number	US-201514953366-A
Country	US
Kind code	B2
Filing date	Nov 29, 2015
Priority date	Sep 13, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A turbine housing includes a bore, a wastegate seat and a wastegate passage; a bushing disposed at least in part in the bore; a rotatable wastegate shaft that includes a shoulder and a control end; a control arm operatively coupled to the wastegate shaft where the bushing is disposed between a surface of the control arm and the shoulder; a wastegate arm that extends from the wastegate shaft where the shoulder is disposed between the wastegate arm and the control end of the wastegate shaft; and a wastegate plug that extends from the wastegate arm where the wastegate plug includes a toroidal surface defined by a portion of a torus where, in a closed state, the toroidal surface contacts the conical surface of the wastegate seat to cover the wastegate passage.

First claim

What is claimed is:

1. An assembly comprising:
a turbine housing that comprises a bore, a wastegate seat and a wastegate passage that extends to the wastegate seat wherein the bore comprises a bore axis, a bore axial length and a bore diameter and wherein the wastegate seat comprises a conical surface;
a bushing disposed at least in part in the bore wherein the bushing comprises a bushing bore, a bushing axis, a bushing axial length and a bushing inner diameter;
a rotatable wastegate shaft disposed at least in part in the bushing bore wherein the wastegate shaft comprises an shaft axis, a shaft axial length and a shaft diameter, wherein the wastegate shaft comprises a shoulder and a control end, wherein the shaft diameter is less than the bushing inner diameter and wherein a diameter of the shoulder is greater than the bushing inner diameter;
a control arm operatively coupled to the wastegate shaft wherein the bushing is disposed between a surface of the control arm and the shoulder of the wastegate shaft and wherein the bushing axial length is less than an axial distance between the surface of the control arm and the shoulder of the wastegate shaft;
a wastegate arm that extends from the wastegate shaft wherein the shoulder is disposed between the wastegate arm and the control end of the wastegate shaft; and
a wastegate plug that is a flapper valve that extends from the wastegate arm wherein the wastegate plug comprises a toroidal surface defined by a portion of a torus wherein, in a closed state, the toroidal surface contacts the conical surface of the wastegate seat to cover the wastegate passage and wherein the wastegate shaft, the wastegate arm and the wastegate plug comprise a unitary component.

2. The assembly of claim 1 wherein the toroidal surface is disposed between an inner diameter and an outer diameter of the wastegate plug.

3. The assembly of claim 1 wherein the toroidal surface comprises a portion of an elliptical torus having a minor axis length that differs from a major axis length.

4. The assembly of claim 3 wherein the elliptical torus comprises a tilt angle.

5. The assembly of claim 1 wherein the wastegate plug comprises a recess disposed interiorly to the toroidal surface.

6. The assembly of claim 1 wherein the bushing comprises a portion that extends axially away from the bore of the turbine housing toward the control arm and a portion that extends axially away from the bore of the turbine housing toward the shoulder of the wastegate shaft.

7. An assembly comprising:
a turbine housing that comprises a bore, a wastegate seat and a wastegate passage that extends to the wastegate seat wherein the bore comprises a bore axis, a bore axial length and a bore diameter and wherein the wastegate seat comprises a conical surface;
a bushing disposed at least in part in the bore wherein the bushing comprises a bushing bore, a bushing axis, a bushing axial length and a bushing inner diameter;
a rotatable wastegate shaft disposed at least in part in the bushing bore wherein the wastegate shaft comprises an shaft axis, a shaft axial length and a shaft diameter, wherein the wastegate shaft comprises a shoulder and a control end, wherein the shaft diameter is less than the bushing inner diameter and wherein a diameter of the shoulder is greater than the bushing inner diameter;
a control arm operatively coupled to the wastegate shaft wherein the bushing is disposed between a surface of the control arm and the shoulder of the wastegate shaft and wherein the bushing axial length is less than an axial distance between the surface of the control arm and the shoulder of the wastegate shaft;
a wastegate arm that extends from the wastegate shaft wherein the shoulder is disposed between the wastegate arm and the control end of the wastegate shaft; and
a wastegate plug that extends from the wastegate arm wherein the wastegate plug comprises a toroidal surface defined by a portion of a torus wherein, in a closed state, the toroidal surface contacts the conical surface of the wastegate seat to cover the wastegate passage, wherein the toroidal surface comprises a portion of an elliptical torus having a minor axis length that differs from a major axis length and wherein the elliptical torus comprises a tilt angle.

Assignees

• Honeywell Int Inc

Inventors

• Marques Manuel
• Laissus Jean-Jacques

Classifications

• F02M26/05

  High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor · CPC title

• F16K1/2014

  Shaping of the valve member · CPC title

• F02B37/183 Primary

  Arrangements of bypass valves or actuators therefor · CPC title

• F02B37/186 Primary

  Arrangements of actuators or linkage for bypass valves · CPC title

• F01D17/105

  by passing part of the fluid · CPC title