Turbocharger for vehicle with improved suspension of the actuating mechanism for variable nozzles
AssigneeBorgWarner Inc.
InventorsUwe Knauer, Siegfried Ritter, Robert Lingenauber
Life of this patent
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Abstract
A turbocharger with an improved suspension mechanism for the actuation ring of a variable nozzle mechanism, for improved maintenance of the geometry of the suspension mechanism in the case of higher temperature oscillations. The suspension mechanism includes a number of guide rollers (48) provided between a housing part (24, 26) and nozzle ring (38) with circumferential grooves (59) in which the inner circumference of the actuating ring rides. The rollers are freely rotatable on pins (55′, 55″), and these pins are inserted in bores (55a or 55b) either in a housing part (24, 26) or in the nozzle ring (38), but not both.
Claims3
A turbocharger in which gas is directed through a first annular passage (30) to the turbine, including a housing (18, 24, 26), a ring of guide blades (34) in the first annular passage (30), which are mounted pivotably on a nozzle ring (38) defining one boundary of the first annular passage, and an annular actuating ring (48) coupled to pivot the blades by movement of the actuating ring in relation to the nozzle ring, and a suspension mechanism (55, 59) for the actuating ring (48) which brings about a coaxial location of the nozzle ring and the actuating ring relative to each other and about the turbine shaft, wherein pins (55) and rollers (49) with grooves (59) are provided about one of the inner and the outer circumference of the actuation ring, which rollers are provided in a second annular passage formed between a housing part (126) and the nozzle ring (38), wherein the pins (55′, 55′) engage with one end in a bore in the nozzle ring (38) and wherein the length of the pins projecting from the bores corresponds approximately to the axial length of the rollers.
Dependencies are inferred from the claim text.