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US 9,540,990 B2Granted
Exhaust-gas turbocharger
AssigneeBorgWarner Inc.
InventorsDietmar Metz, Martin Mueller, Thomas Ramb
Life of this patent
Estimating the term…
Abstract
A variable turbine geometry (VTG) exhaust-gas turbocharger in which guide vanes are adjusted by means of a unison ring, the structure of which has a simpler and thus more cost-effective design. The number of components is reduced, for example for rollers on pins as are provided in the case of known bearings. A very beneficial relationship between friction radius and rolling radius in the given installation space is obtained.
Claims16
An exhaust-gas turbocharger (1) having
- a turbine (2),
- which has a turbine wheel (3) surrounded by an intake duct (4), and
- a VTG cartridge (5),
- which has a disk (6) and a vane bearing ring (7), which delimit the intake duct,
- which has a plurality of vanes, which are arranged in the intake duct (4) and mounted in the vane bearing ring (7) by way of rotatable vane shafts (9), which are connected to vane levers (10), the lever heads (11) of which engage into associated grooves (12) in a unison ring (13), which surrounds the vane bearing ring (7) on the outside, and
- a radial bearing between the unison ring (13) and the vane bearing ring (7), wherein
- the radial bearing has at least one roller element (8),
- which has a first supporting region (8A), which is inserted into a depression (14) in the vane bearing ring (7) which is arranged circumferentially and is open to the outer circumference (U), and
- which has a second supporting region (8B), which engages into a bearing groove (15) which is arranged opposite the depression (14), is provided in the unison ring (13) and is open on one side in the direction toward the depression (14).
6 more elements
A VTG cartridge (5) of an exhaust-gas turbocharger (1), having
- a disk (6) and a vane bearing ring (7), which delimit an intake duct (4),
- a plurality of vanes, which are arranged in the intake duct (4) and mounted in the vane bearing ring (7) by way of rotatable vane shafts (9), which are connected to vane levers (10), the lever heads (11) of which engage into associated grooves (12) in a unison ring (13), which surrounds the vane bearing ring (7) on the outside, and
- a radial bearing between the unison ring (13) and the vane bearing ring (7), wherein
- the radial bearing has at least one roller element (8),
- which has a first supporting region (8A), which is inserted into a depression (14) in the vane bearing ring (7) which is arranged circumferentially and is open toward the outer circumference (U), and
- which has a second supporting region (8B), which engages into a bearing groove (15) which is arranged opposite the depression (14), is provided in the unison ring (13) and is open on one side in the direction toward the depression (14).
3 more elements
Dependencies are inferred from the claim text.