Daimler Chrysler Ag

Daimler-benz Ag

Daimler Ag

Hans-Hubert Hemberger

Klaus Allmendinger

Thomas Liebscher

Matthias Scherer

Christoph Reckzugel

Norbert Ruzicka

Anton Kerckhoff

Michael Lenz

Holger Adler

Karlheinz Baier

Stefan Kurze

Ulrich Merten

Winfried Stiltz

Dirk Becker

Juergen Koehler

Oliver Erlenmayer

Andreas Hasert

Andreas Roll

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

In a method for open-loop and closed-loop control of the number and sequence of strokes in the motive process of a reciprocating-piston internal combustion engine, in particular a reciprocating-piston internal combustion engine with direct injection, it being possible, in the case of leaner-than-stoichiometric combustion, for the residual oxygen not yet used for combustion to be used for further working strokes, and a gas exchange occurring only after the residual oxygen in the combustion chamber has been completely burned or the air ratio &lgr; in the combustion chamber has fallen below a lower limiting value &lgr; .

Method for open-loop and closed-loop control of the number and sequence of strokes in the motive process of a reciprocating-piston internal combustion engine

A process for determining at least one fuel-injection-related parameter for an internal-combustion engine with a common-rail fuel injection system individually for each engine combustion chamber and each injection operation is provided. The pressure in the distributor pressure space, which is assigned jointly to the engine combustion chambers, of the common-rail fuel injection system is detected for a respective fuel injection operation for a respective combustion chamber in its signal course via a pressure sensor of the distributor pressure space. From the detected pressure course, a pertaining pressure course pattern is obtained from which the at least one fuel-injection-related parameter is determined individually for each combustion space and each injection operation.

Process for determining a fuel-injection-related parameter for an

The invention provides a process and an apparatus for controlling the engine torque of an internal-combustion engine. A dynamic desired torque component is determined from a demanded desired engine torque, and is used to determine a corresponding displacement of the ignition point or of the injection start, while a remaining quasi-static desired torque component is regulated by a corresponding adjustment of the air flow rate or of the fuel injection duration.

Process and apparatus for adjusting the torque of an interal-combustion

The invention provides a process and apparatus for controlling combustion in an Otto combustion engine in which the control variables that control combustion are determined for a particular power cycle as a function of the detected combustion course of a preceding power cycle. According to the invention, a desired burn-through function value for a particular power cycle is precalculated based on values of pertaining influence factors detected in a preceding power cycle, to determine an actual burn-through function value of the particular power cycle in real time. The desired burn-through function is compared with the actual burn-through function and actualized values for the burn-through function influence factors are determined. These factors are used to determine the control variable values for a subsequent power cycle.

Process and apparatus for controlling the combustion course in an Otto

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Notzingen, Germany

Hans-Hubert Hemberger