Cummins Inc.

Cummins Turbo Technologies Limited

Tim Denholm

Robert L Holroyd

Stephen E Garrett

James Alexander McEwen

Tom J Roberts

Christopher Normington

John Frederick Parker

Simon David Moore

James Alexander Mcewen

Arun Vijayakumar

Michael Voong

Robert Morphet

Toshihiko Nishiyama

Owen Alistair Ryder

Simon Moore

A variable geometry turbine comprising a turbine wheel mounted for rotation about a turbine axis within a housing. The housing defines an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls. The turbine further comprises a cylindrical sleeve that is axially movable across the annular inlet to vary the size of a gas flow path through the inlet. The annular inlet is divided into at least two axially offset inlet passages. The inner diameter of the sleeve is greater than the inner diameter of the inlet passages.

Turbomachine

A method of operating a generator arrangement includes selecting an operating mode as a function of at least one of: a speed of an engine, a temperature of at least a portion of the engine, a property of an exhaust fluid of the engine, and whether an engine braking command signal is received by the controller; controlling the flow of fluid from a first engine outlet to a first turbine by setting, based on the selected operating mode, an operating condition of a first flow control mechanism, the first turbine being part of a turbocharger having a compressor in fluid flow communication with an engine inlet; and controlling the flow of fluid from a second engine outlet to a second turbine by setting, based on the selected operating mode, an operating condition of a second flow control mechanism, the second turbine being parallel to the first turbine and being part of an electrical generator.

Turbo-compound turbocharged engine and method of operating turbo-compound turbocharged engine

According to a first aspect of the present invention there is provided a variable geometry turbine comprising: a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and a guide for guiding the movement of the cylindrical sleeve, the guide being at least partially located within the inlet at a radially extent of the inlet portions, and extending in an axial direction parallel to the turbine axis.

According to an aspect of the present invention, there is provided a variable geometry turbine comprising: a turbine wheel mounted on a turbine shaft within a housing assembly for rotation about a turbine axis, the housing assembly defining a gas flow inlet passage upstream of the turbine wheel; an annular wall member defining a wall of the inlet passage and which is displaceable in a direction substantially parallel to the turbine axis to control gas flow through the inlet passage; at least one moveable rod operably connected via a first end of the rod to the annular wall member, the rod being moveable to control displacement of the annular wall member, the rod extending in a direction substantially parallel to the turbine axis, the rod being connected to the annular wall member via a first arm and a second arm, a first end of the first arm and a first end of the second arm being attached to the rod, and a second end of the first arm being attached to the annular wall member at a first circumferential position, and a second end of the second arm being attached to the annular wall member at a second, different circumferential position, the first arm and the second arm being resilient in order to allow relative movement between the first end of the rod and the annular wall member during expansion of the annular wall member.

Turbocharger

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Warwickshire, United Kingdom

Tim Denholm