Cummins Turbo Technologies Limited

Cummins Inc.

Cummins Emission Solutions Inc.

Lee J Robinson

James A McEwan

James Alexander McEwen

Stephen E Garrett

Owen Alistair Ryder

Daniel M Acker

Akram Ghassan Khatib

Jim McEwan

Nandha Kumar Manoharan

Simon James Davis

Steven Garrett

James A Mcewan

James A Mcewen

A turbocharger system comprises a first relatively small high-pressure (HP) turbocharger and a second relatively large low pressure (LP) turbocharger. The turbine of the LP turbocharger is connected in series downstream of the turbine of the HP turbocharger. A first exhaust bypass flow passage provides a bypass flow path around the HP turbine. A second exhaust bypass flow passage provides a bypass flow path around the LP turbine. A rotary valve is located at a junction of the first and second bypass flow passages and a first exhaust gas flow passage. The rotary valve comprises a valve rotor which is rotatable selectively to permit or block flow to the LP turbine and to permit or block flow to the first and second bypass paths.

Multi-stage turbocharger system with bypass flowpaths and flow control valve

Multi-stage turbocharger system

A turbocharger system comprises a first relatively small turbocharger and a second relatively large turbocharger connected in series and an exhaust gas flow control valve. The exhaust control valve has an inlet port communicating with the exhaust gas flow upstream of the first turbine a first outlet port communicating with the exhaust flow downstream of said first turbine but upstream of said second turbine, and a second outlet port communicating with the exhaust flow downstream of said second turbine. The valve is operable to selectively permit or block flow through the first and second outlet ports.

A turbocharger system comprises a first relatively small high-pressure (HP) turbocharger () and a second relatively large low pressure (LP) turbocharger (). The turbine () of the LP turbocharger () is connected in series downstream of the turbine () of the HP turbocharger () in a first exhaust gas passage (). An exhaust bypass flow passage () provides a bypass flow path around the HP turbine (). A rotary valve () is located at a junction of the bypass flow passage () and a first exhaust gas flow passage (). The rotary valve () comprises a valve rotor () which is rotatable to selectively permit or block flow to the LP turbine () from either the first exhaust gas passage () or the bypass gas passage ().

A turbocharger system comprises a first relatively small high-pressure (HP) turbocharger and a second relatively large low pressure (LP) turbocharger. The turbine of the LP turbocharger is connected in series downstream of the turbine of the HP turbocharger in a first exhaust gas passage. An exhaust bypass flow passage provides a bypass flow path around the HP turbine. A rotary valve is located at a junction of the bypass flow passage and a first exhaust gas flow passage. The rotary valve comprises a valve rotor which is rotatable to selectively permit or block flow to the LP turbine from either the first exhaust gas passage or the bypass gas passage.

A variable geometry turbine has a housing for receipt of the turbine wheel. A gas flow control mechanism in the housing upstream of said turbine wheel is operable to control gas flow through a gas flow inlet passage. The control mechanism has a movable nozzle ring or shroud for varying the size of the gas flow inlet passage. A transmission mechanism for connection between an actuator and the control mechanism converts movement applied by the actuator into movement shroud or nozzle ring. The transmission mechanism comprises a yoke having a shaft that is rotatably supported by a wall of the housing. The yoke defines arms that extend outwardly of the shaft and which engage with the shroud or nozzle ring. There is provided at least one recess defined in an inside surface of the housing, the recess extending from shaft rotation axis and configured to allow passage of an end of the yoke shaft along it during insertion of the yoke into the housing.

Variable geometry turbine and assembly thereof

Multi-stage turbocharger system with exhaust control valve

A turbocharger wastegate valve assembly comprises a first bypass port communicating with a first portion of an exhaust inlet and a first valve member adapted for engaging and sealing a first valve seat surrounding the first bypass port. The valve assembly further comprises a second bypass port communicating with a second portion of an exhaust inlet and a second valve member adapted for engaging and sealing a second valve seat surrounding the second port. A shaft supports each valve member for rotation about a shaft axis to lift both the first and second valve members from sealing engagement with the first and second valve seats respectively. The first valve seat is inclined relative to the second valve seat and the shaft has freedom of movement in the axial direction.

Turbocharger with dual wastegate

A turbocharger system comprises a first relatively small high-pressure (HP) turbocharger () and a second relatively large low pressure (LP) turbocharger (). The turbine () of the LP turbocharger () is connected in series downstream of the turbine () of the HP turbocharger () in a first exhaust gas passage (). An exhaust bypass flow passage () provides a bypass flow path around the HP turbine (). A rotary valve () is located at a junction of the bypass flow passage () and a first exhaust gas flow passage (). The rotary valve () comprises a valve rotor () which is rotatable to selectively permit or block flow to the LP turbine () from either the first exhaust gas passage () or the bypass gas passage (). The rotary valve () is operated to at least partially restrict flow to the LP turbine to generate a braking back pressure.

Growing community of inventors

Huddersfield, United Kingdom

Lee J Robinson