Exhaust-gas turbocharger
AssigneeBorgWarner Inc.
InventorsMichael Stilgenbauer, Matthias Ruh, Gerald Schall
Life of this patent
Estimating the term…
Abstract
An exhaust-gas turbocharger (1), with: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (10) comprising a pivotable flap lever (12), a flap plate (11), which is connected to the flap lever (12), for opening and closing the wastegate duct, and having a spring element (17) which is arranged between the flap lever (12) and a disc (18) fastened to the flap plate (11). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (20), which is of curved form, of the flap lever (12).
Claims9
An exhaust-gas turbocharger (1) comprising:
- a turbine housing (2) comprising a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and a wastegate duct (45) located between the turbine housing inlet (8) and the turbine housing outlet (9), and
- a flap arrangement (10) comprising a pivotable flap lever (12) having an opening (24), a flap plate (11) mounted to one side of the flap lever (12), and the flap plate (11) is connected to a disc (18) on an another side of the flap lever (12) via a projection (16) extending through the opening (24), the flap plate (11) is positioned for opening and closing the wastegate duct (45), the opening (24) having a diameter, the projection (16) having a diameter, the diameter of the opening (24) being greater than the diameter of the projection (16), and a spring element (17) which is braced between the flap lever (12) and the disc (18),
- wherein a curved sliding contact surface (20) is provided on the flap lever (12), facing the spring element (17), and surrounding the opening (24) of the flap lever (12), and
- wherein the spring element (17) has an outer circumferential region (23) which is curved and supported on the curved sliding contact surface (20) of the flap lever (12) such that when the flap plate (11) is oblique in relation to the flap lever (12) the spring element (17) can slide freely along the sliding contact surface (20).
Dependencies are inferred from the claim text.