Turbine with variable inlet nozzle geometry

A technology for turbines and turbine impellers, applied in the field of turbochargers and variable turbochargers, which can solve problems such as difficult guarantees and increased nozzle ring loads
CN101341313BActive Publication Date: 2011-10-26CUMMINS TURBO TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CUMMINS TURBO TECH
Publication Date
2011-10-26

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Abstract

The invention provides a variable turbine. The variable turbine comprises a turbine wheel supported in a housing for rotation about a turbine axis with an annular inlet passageway defined between a radial face of a movable nozzle ring and a facing wall of the housing. The nozzle ring is movable along the turbine axis to vary the width of the inlet passageway. A substantially annular rib is provided either on the face of the nozzle ring (such that the minimum width of the inlet passageway is defined between the rib and a the facing wall of the housing) or on the facing wall of the housing (such that the minimum width of the inlet passageway is defined between the rib and the nozzle ring).
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Description

technical field

[0001] The present invention relates to a variable geometry turbine and a method of controlling the variable geometry turbine. In particular, but not exclusively, the present invention relates to variable turbochargers, and more particularly to turbochargers operative to control engine braking or to affect the temperature of the exhaust gases of an internal combustion engine. Background technique

[0002] A turbocharger is a well known device for supplying air to the intake of an internal combustion engine at a pressure above atmospheric pressure (boost). A conventional turbocharger basically consists of an exhaust gas driven turbine wheel mounted on a rotatable shaft within a turbine housing connected downstream of the engine outlet manifold. Rotation of the turbine wheel rotates a compressor wheel mounted on the other end of the shaft within the compressor housing. The compressor wheel delivers compressed air to the engine inlet manifold. The turbocharge...

Claims

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