Daimler Chrysler Ag

Daimler Ag

Dirk Becker

Patrick Izquierdo

Thomas Liebscher

Hans-Hubert Hemberger

Holger Adler

Klaus Allmendinger

Michael Lenz

Anton Kerckhoff

Norbert Ruzicka

Wolfgang Pellkofer

Stefan Kurze

Ulrich Merten

Christian Russer

Andreas Roll

Oliver Erlenmayer

Marcus Brand

Andreas Hasert

Piston pin for a connecting rod in a reciprocating internal combustion engine, wherein the piston pin carries at least in the area of the running surface a thermal sprayed slide layer of a metallic bearing material or slide bearing material, as well as reciprocating internal combustion engine with a connecting rod with small and with large connecting rod eye, wherein at least the running surface of one of the piston pins is formed of a thermal sprayed slide layer of a metallic bearing material, which exhibits a lower hardness than the running surface of the corresponding connecting rod eye and process for manufacturing a described piston pin with the steps of a extrusion molding or machining a piston pin preform, introduction of a recess in the area which will later become the running surface, roughening the outer surface in the area of the recess, application of a coating of a bearing material by a thermal spray process.

Piston pin with slide layer for connecting rod eye for internal combustion engines

The invention relates to a method for operating a diesel engine in which an air ratio (&#x3bb;) of the fuel which is to be burnt and of the combustion air supplied is set by a control unit () according to predetermined values. When a value () which is predetermined as a switching criterion is recorded, the control unit () switches to a special operating mode for regeneration of a catalytic converter () and sets the fuel/air ratio according to predetermined values for this operating mode. To achieve more effective regeneration of the catalytic converter, according to the invention it is provided that at least one afterinjection, which is separated in time from a main injection, of fuel which is also to be burnt takes place in the special operating mode.

Method for operating a diesel engine

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Munich, Georgia

Dirk Becker