Audi Ag

Michael Kuhn

Markus Sonner

Ralf Budack

Peter Senft

Manfred Schindler

Xaver Stemmer

Stefan Dengler

Walter Vilsmeier

A method for operating an internal combustion engine includes a fuel supply device for at least one first and one second fuel, wherein the internal combustion engine has at least one cylinder which includes at least one intake valve and into which air, in particular fresh air, can be supplied via an intake pipe. In a first operating mode of the internal combustion engine, the first fuel is introduced only into the intake pipe, and in a second operating mode, the second fuel is exclusively introduced directly into the cylinder, and in the second operating mode an intake valve opening time period is adjusted to be shorter than in the first operating mode.

Method for operating an internal combustion engine and internal combustion engine

The invention relates to a method for operating an internal combustion engine comprising at least two cylinders respectively provided with admission valves and exhaust valves. According to the invention, in order to fill the cylinders with a larger amount of unburned gas during a gas exchange, the exhaust interval is reduced and the crossover phase of admission and exhaust intervals is extended, for at least one cylinder (). The invention also relates to an internal combustion engine for carrying out said method.

Method for operating an internal combustion engine, and internal combustion engine for carrying out said method

A method of diminishing the thermal effects of the exhaust gas recirculation in an internal combustion engine of a motor vehicle generally consisting of sensing the temperature of the gas at a selected point along the flow thereof, comparing the sensed temperature with a selected temperature and adjusting the supply of the gas responsive to a selected deviation of the sensed temperature from the selected temperature.

Process and device for protection of temperature-sensitive components in the intake area of an internal combustion engine with exhaust recirculation

Mass compensator for an internal combustion piston engine

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Gaimersheim, Germany

Michael Kuhn