Volkswagen Ag

Florian Noodt

Ekkehard Pott

Manfred Kloft

Dirk Hagelstein

Paul Gnegel

Jens Kühlmeyer

Oliver Fladung

Marc-Jochen Schweizer

A method for operating an internal combustion engine includes controlling a variable valve drive for at least one intake valve and at least one exhaust valve of at least one working cylinder of an internal combustion engine in dependence on operating states of the internal combustion engine. The valve drive is variable with regard to valve control times and/or a valve lift. The operating states of the internal combustion engine are defined by load demands, rotational speeds, load conditions and/or torque conditions. Valve operating states of the variable valve drive are set in dependence on the operating states of the internal combustion engine. The valve operating states can increase a charge of a working cylinder, provide an overlap of opening times of intake and exhaust valves, minimize fuel consumption or operate an intake valve in an expansion mode or according to a Miller/Atkinson process.

Method for operating an internal combustion engine having a variable valve drive

The invention relates to an internal combustion engine, especially of a motor vehicle, which comprises an air path for intake air in which a mechanically driven charge unit (), especially a compressor, which can be connected and disconnected by means of a coupling (), an exhaust gas turbocharger (), an intake pipe (), connected to air inlets of a cylinder block () of the internal combustion engine, and a charge cooler () are mounted. One pressure outlet () of the mechanically driven charge unit (is directly connected to the intake pipe () and one pressure outlet () of the exhaust gas charger () is connected to an intake inlet () of the mechanically driven charge unit (). The pressure outlet () of the exhaust gas charger () is connected to the intake inlet () of the mechanically driven charge unit () via an on-off butterfly valve () and upstream of said on-off butterfly valve () to the intake pipe () via a load butterfly valve (). The charge cooler () is integrated into the intake pipe () to give an intake/charge cooler module.

Dual-charged internal combustion engine and method for operating the same

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Munich, Georgia

Florian Noodt