Daimler Ag

Daimler Truck Ag

Alexander Zink

Marc Oliver Wagner

Thomas Schuhmacher

A method for operating an internal combustion engine. The internal combustion engine has multiple cylinders and the cylinders are assigned a respective exhaust valve and intake valve. The internal combustion engine has a crankshaft, an intake camshaft, and an exhaust camshaft. Initially, the internal combustion engine is operated in a first operating state. A second operating state of the internal combustion engine is set by the intake camshaft being adjusted late relative to the crankshaft in comparison to the first operating state and the exhaust camshaft being adjusted early relative to the crankshaft in comparison to the first operating state. To set the second operating state, the intake camshaft is adjusted late by a first value which is in a range from 50-120 crank angle degrees and the exhaust camshaft is adjusted early by a second value which is in a range of 1-35 crank angle degrees.

Method for operating an internal combustion engine, in particular of a motor vehicle

A method for operating a reciprocating internal combustion engine in an engine braking mode of operation is provided. The method includes closing, for a first time, at least one exhaust valve of at least one cylinder in the engine braking mode of operation within a working cycle, and opening for a first time, and closing, for a second time, the at least one exhaust valve of the at least one cylinder, and opening for a second time to thereby discharge compressed gas in the cylinder via a piston of the cylinder from the cylinder. After the first opening and before the second closing, the exhaust valve is kept open, until the cylinder is filled with gas which flows through at least one exhaust channel from at least one second cylinder of the reciprocating internal combustion engine.

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Esslingen, Germany

Alexander Zink