Borgwarner Inc.

Volker Mueller

Volker Joergl

John Shutty

David B Roth

Ralf Christmann

Gerd Spinner

A method of controlling exhaust gas recirculation (EGR) in a turbocharged compression-ignition engine system including an engine, an induction subsystem in upstream communication with the engine, an exhaust subsystem in downstream communication with the engine, a high pressure EGR path between the exhaust and induction subsystems upstream of a turbocharger turbine and downstream of a turbocharger compressor, and a low pressure EGR path between the exhaust and induction subsystems downstream of the turbocharger turbine and upstream of the turbocharger compressor. A target total EGR fraction for compliance with exhaust emissions criteria is determined, then a target HP/LP EGR ratio is determined to optimize other engine system criteria within the constraints of the determined target total EGR fraction.

Controlling exhaust gas recirculation in a turbocharged compression-ignition engine system

The invention relates to a regulating method for a turbocharger () with a turbine () which has a variable turbine geometry (VTG) provided with adjustable guide blades (), having the following method steps: a) closing the guide blades () of the variable turbine geometry (VTG), as a function of the present operating point of the internal combustion engine which is turbocharged by means of the turbocharged (), to the maximum possible closing position of the guide blades () for said operating point, and b) regulating the charge pressure (P) by adjusting the position of the guide blades () in a closed regulating loop.

Regulating method for a turbocharger of an internal combustion engine, and turbocharger

Methods and products for controlling exhaust gas recirculation.

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Marpingen, Germany

Volker Mueller