Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Thorben Walder

Andre Casal Kulzer

Erwin Rutschmann

Ludwig Theilemann

Michael Reinhardt

Michael Ebert

A method is provided for operating an internal combustion engine () that has at least one cylinder row () with multiple cylinders (). Each cylinder row () has a first exhaust-gas turbocharger () and a second exhaust-gas turbocharger (). The method includes providing charge air for the cylinders () of the internal combustion engine () either exclusively by the first exhaust-gas turbocharger () of the cylinder row () of the internal combustion engine () or by both the first exhaust-gas turbocharger () of the cylinder row () of the internal combustion engine () and the second exhaust-gas turbocharger () of the cylinder row () of the internal combustion engine () in a manner dependent on an operating mode demanded by a driver and/or by a controller for the internal combustion engine ().

Method and control device for operating an internal combustion engine

A method for operating an internal combustion engine () that has at least one cylinder row () with first and second exhaust-gas turbochargers (). Charge air is provided by the first exhaust-gas turbocharger () in single-charger operation, but is provided by the first and second exhaust-gas turbocharger () in two-charger operation. To switch from single-charger to two-charger operation above a load threshold value of the internal combustion engine (), when a speed of the internal combustion engine () reaches or overshoots a threshold value, a charge pressure is increased to build up a torque reserve and a charge pressure reserve and to maintain a driver demand torque. When the charge pressure reaches or overshoots a threshold value, a switch is made from single-charger operation to two-charger operation, and subsequently, the torque reserve and the charge pressure reserve are eliminated.

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Stuttgart, Germany

Thorben Walder