Mono or dual coaxial slider valve for controlling a twin scroll turbocharger
AssigneeBorgWarner Inc.
InventorsMichael STILGENBAUER, Matthias RUH, Philip PARMA, Ivan INJAC
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Abstract
A compact flow control valve capable of providing long service life in a very hostile environment. The valve is a mono or dual coaxial slider valve capable of controlling two different functions sequentially, at least one of the functions being controlled progressively. The flow control valve controls the fluid connection between two volutes (6, 7) of a turbine housing (2) of a turbocharger as well as the fluid connection between the two volutes (6, 7) of the turbine housing (2) of the turbocharger and a waste gate port (9).
Claims10
A turbocharger with a turbine housing having at least a first volute, a second volute, and a wastegate, and comprising
- a valve housing defining at least one cylindrical space having a longitudinal axis, and having at least a first opening in communication with the first volute, a second opening in communication with the second volute, and third opening in communication with the wastegate;
- at least one piston slidable within said cylindrical space between a full closed and a full open position, and having a piston shaft,
- displacement means adapted to effect selective displacement of the at least one piston between the full closed and the full open position,
- wherein in the full closed position the first, second and third openings are blocked, and
- wherein as the at least one piston is moved out if the full closed position and in the direction of the full open position the openings are simultaneously or sequentially unblocked to allow communication between the unblocked openings.
Dependencies are inferred from the claim text.