Simplified variable geometry turbocharger with increased flow range

a variable geometry, turbocharger technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of casting wanting to “unwind”, affecting etc., to achieve simple flow control devices, increase the flow range of the turbine stage, and reduce the effect of casting stress
US20130219885A1Inactive Publication Date: 2013-08-29BORGWARNER INC
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
BORGWARNER INC
Publication Date
2013-08-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

A variable geometry turbocharger is simplified yet able to maintain pulse energy. In a first embodiment, a turbine housing is provided with a pivoting flow control valve which pivots about a point near the entry to the turbine housing. By moving the valve about the pivot point, the effective volume of the turbine housing volute is varied, thus effectively reducing the volume of exhaust gas in the volute, allowing control of exhaust gas flowing to the turbine wheel. In the second embodiment of the invention, a rotating wedge segment within the volute is rotated from a first position to a second position, changing the effective volume of the volute and allowing control of exhaust gas flowing to the turbine wheel.
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Description

FIELD OF THE INVENTION

[0001] This invention addresses the need for a reduced cost, increased range, turbine flow control device, and accomplishes this by designing a simplified variable geometry turbocharger housing with controlled assymetric flow to the turbine wheel.BACKGROUND OF THE INVENTION

[0002] Turbochargers are a type of forced induction system. They deliver air, at greater density than would be possible in the normally aspirated configuration, to the engine intake, allowing more fuel to be combusted, thus boosting the engine's horsepower without significantly increasing engine weight. A smaller turbocharged engine can replace a normally aspirated engine of a larger physical size, thus reducing the mass and aerodynamic frontal area of the vehicle.

[0003] Turbochargers (FIG. 1) use the exhaust flow (100) from the engine exhaust manifold, which enters the turbine housing at the turbine inlet (51) of a turbine housing (2), to drive a turbine wheel (70), which is located in the turb...

Claims

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