Volkswagen Ag

Thomas Lang

Jens Jeschke

Axel Groenendijk

Werner Aberle

Jörn Müller

Achim Freitag

Hans-Georg Nitzke

Uwe Scher

Lothar Nee

Dieter Mannigel

Jörg Larink

Jürgen Wendt

Jan Piewek

Joerg Larink

Andreas Wagner

An internal combustion engine has a high-pressure exhaust-gas recirculation line and a low-pressure exhaust-gas recirculation line with a low-pressure exhaust-gas recirculation valve. The low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system downstream of a turbine of an exhaust-gas turbocharger and opens into a fresh-air system upstream of a compressor of the exhaust-gas turbocharger. An exhaust-gas flap is disposed in the exhaust-gas system downstream from where the low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system. At least one pressure sensor is disposed in the low-pressure exhaust-gas recirculation line and configured such that the at least one pressure sensor determines a pressure difference in the low-pressure exhaust-gas recirculation line between a point upstream of the low-pressure exhaust-gas recirculation valve and a point downstream of the low-pressure exhaust-gas recirculation valve. A method for operating an internal combustion engine is also provided.

Internal combustion engine with an exhaust-gas recirculation and method for operating an internal combustion engine

In a method for controlling the air ratio lambda and for controlling the torque of an internal combustion engine, e.g. of a diesel engine, a fuel is supplied in at least two injection processes, including a main injection of a main injection quantity and a post-injection of a post-injection quantity, and the main injection quantity is influenced to control the torque and the post-injection quantity is influenced to control the lambda value. A corrective main injection quantity ascertained for the torque control is at least proportionally subtracted from the post-injection quantity.

Method for the lambda and torque control of an internal combustion engine and program algorithm

A method for diagnosing an engine control unit () conducts an analysis as to whether the signal values from the cylinder pressure sensors () are faulty based on at least one characteristic value which is derived from an evaluation of signal values from the cylinder pressure sensors () of the cylinders () in a combustion engine (). In addition to this is described the engine control unit () designed to execute the method. Also hereby disclosed is a method which, based on symmetrical aspects, determines a crankshaft angle (phipCylMaxTDC) for a cylinder pressure maximum during push mode operation of the combustion engine ().

Method for diagnosing an engine control unit and corresponding engine control unit

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Wolfsburg, Germany

Thomas Lang