Turbocharger

Patent metadata

Field	Value
Publication number	US-9506371-B2
Application number	US-201214235538-A
Country	US
Kind code	B2
Filing date	Jul 24, 2012
Priority date	Aug 8, 2011
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A turbocharger ( 1 ) with variable turbine geometry (VTG) having a guide grate ( 18 ) which surrounds a turbine wheel ( 4 ) radially at the outside, which has an adjusting ring ( 5 ) operatively connected to the guide blades ( 7 ) via associated blade levers ( 20 ) which are fastened to blade shafts ( 8 ) at one of the ends thereof. Each blade lever ( 20 ) has a lever head ( 23 ) which can be placed in engagement with an associated engagement recess ( 24 ), which has a base wall ( 26 ), of the adjusting ring ( 5 ), and which has a stop ( 25 ) at least for setting the minimum throughflow through the nozzle cross sections formed by the guide blades ( 7 ). The stop is a first support point ( 25 ) on the base wall ( 26 ), wherein, in the minimum throughflow position, the lever head ( 23 ) makes contact, via a wall surface ( 27 ) facing toward the base wall ( 26 ), with said first support point.

First claim

The invention claimed is:

1. A turbocharger ( 1 ) with variable turbine geometry (VTG) having
a turbine housing ( 2 ) with a supply duct ( 9 ) for exhaust gases;
a turbine wheel ( 4 ) which is mounted rotatably in the turbine housing ( 2 ); and
a guide grate ( 18 )
which surrounds the turbine wheel ( 4 ) radially at the outside,
which has a blade bearing ring ( 6 ),
which has a multiplicity of guide blades ( 7 ) which have in each case one blade shaft ( 8 ) mounted in the blade bearing ring ( 6 ),
which has an adjusting ring ( 5 ) operatively connected to the guide blades ( 7 ) via associated blade levers ( 20 ) which are fastened to the blade shafts ( 8 ) at one of the ends thereof, wherein each blade lever ( 20 ) has, at the other end, a lever head ( 23 ) which can be placed in engagement with an associated engagement recess ( 24 ), which has a base wall ( 26 ), of the adjusting ring ( 5 ), and
which has a stop ( 25 ) at least for setting the minimum throughflow through the nozzle cross sections formed by the guide blades ( 7 ),
wherein the stop is a first support point ( 25 ) on the base wall ( 26 ), wherein, in the minimum throughflow position, the lever head ( 23 ) makes contact, via a wall surface ( 27 ) facing toward the base wall ( 26 ), with said first support point.

2. The turbocharger as claimed in claim 1 wherein a further stop in the form of a second support point ( 28 ) on the base wall ( 26 ) is provided, wherein in a maximum throughflow position, the lever head ( 23 ) makes contact, via the wall surface ( 27 ) facing toward the base wall ( 26 ), with said second support point.

3. The turbocharger as claimed in claim 2 , wherein the first and second support points ( 25 , 28 ) are arranged symmetrically with respect to a radius line (R) running through a central point (M 8 ) of the blade shaft ( 8 H) which is assigned to the lever head ( 23 ).

4. The turbocharger as claimed in claim 1 , wherein, in an intermediate blade position (ST M ), there is play (S) between the base wall ( 26 ) and the wall surface ( 27 ), which points toward said base wall ( 26 ), of the lever head ( 23 ).

Assignees

• Ramb Thomas
• Metz Dietmar
• Borgwarner Inc

Inventors

• Ramb Thomas
• Metz Dietmar

Classifications

• F05D2260/60

  Fluid transfer · CPC title

• F05D2260/50

  Kinematic linkage, i.e. transmission of position · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F02B37/24 Primary

  by using pumps or turbines with adjustable guide vanes · CPC title

• F01D17/165 Primary

  for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line (F01D17/167 takes precedence) · CPC title