Robert Boschgmbh

Franz Raichle

Wolfgang Fischer

Michael Kessler

Haris Hamedovic

Joachim Berger

Rainer Strohmaier

Joerg Breuninger

Matthias Schueler

Axel Loeffler

Jens Damitz

Juergen Foerster

Ruediger Fehrmann

Andreas Rupp

Mohamed Youssef

Wolfram Gerwing

Peter Skala

Tobias Kress

Walter Lindermeir

Johann Boehme

Michael Wagner

In a method for recognizing knocking of an internal combustion engine, solid-borne sound signals are measured and solid-borne sound features are recovered from the measured sound signals. A peak pressure for a combustion event of the internal combustion engine is estimated from the solid-borne sound features, and the estimated peak pressure is compared with a knock recognition threshold, knocking of the internal combustion engine being recognized when the knock recognition threshold is exceeded by the estimated peak pressure.

Method and apparatus for recognizing knocking of an internal combustion engine, preferably of a gasoline engine

A method for determining cylinder-specific combustion features of an internal combustion engine, the cylinder-specific combustion features being ascertained from a variable which represents the crankshaft speed, especially being ascertained from a signal of a crankshaft sensor or camshaft sensor. The cylinder-specific combustion features include a combustion position of at least one cylinder and/or a torque of the crankshaft.

Method for determining cylinder-specific combustion features of an internal combustion engine

The present invention relates to a method for detecting an angular position signal representing the rotary motion of a rotating part of an internal-combustion engine. The internal-combustion engine includes at least one combustion chamber. In addition, a speed sensor of the type mentioned initially is provided, the speed sensor outputting a rotation-measurement signal representing the rotary motion of a sensing wheel connected with the rotating part. At least one pressure sensor is also provided that outputs a pressure signal representing the pressure in a combustion chamber. The method according to the present invention has the following steps: Detect the pressure signal, detect the rotation-measurement signal, calculate a correction quantity that is a function, at the least, of the detected pressure signal and rotation-measurement signal, and determine the angular position signal by linking the detected rotation-measurement signal with the correction quantity. The core of the present invention is the identification and very good compensation of the sensing wheel error by performing a joint evaluation of the rotational-speed signal and the compression chamber pressure of one or more indicated cylinders.

Method and device for detecting an angular position signal for an internal-combustion engine

A device and a method for controlling an internal combustion engine, where a first variable characterizing the pressure in the combustion chamber of at least one cylinder of the internal combustion engine is measured by at least one sensor. A second variable characterizing the energy released during the combustion is ascertained from the first variable. When a threshold value of the second variable is exceeded, a third variable characterizing the combustion process is detected.

Method and device for controlling an internal combustion engine

A method and a device for analyzing a signal from an ion current sensor of an internal combustion engine. At least one torque quantity characterizing the torque produced by the internal combustion engine is determined on the basis of a signal from the ion current sensor.

Method and device for analyzing a signal from an ion current sensor in an internal combustion engine

A method and a device are described for evaluating a signal from an ionic current sensor of an internal combustion engine. Based on a signal from the ion current sensor, at least one quantity characterizing the combustion in the internal combustion engine is determined. At least one quantity characterizing a combustion start and/or a combustion quality is determined by conditioning the signal.

Method and device for evaluating an ion current sensor signal in an internal combustion engine

A method and an arrangement for evaluating the combustion operations in an internal combustion engine with a model is suggested. The model takes a time-dependent transfer between pressure and structure-borne noise as a basis for the relevant low frequency oscillations and only individual components of the reconstructable pressure signal are used for the determination of combustion-relevant parameters and conditions. Independence of engine speed is achieved with the realization of the time dependency with an angular-dependent transfer function.

Method and arrangement for evaluating combustion processes in an internal combustion engine

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Korntal-Muenchingen, Germany

Franz Raichle