Robert Boschgmbh

Carsten Kluth

Werner Haeming

Oskar Torno

Axel Heinstein

Steffen Franke

Michael Baeuerle

Juergen Sauler

Iwan Surjadi

Federico Buganza

Matthias Biehl

Jasmin Dieringer

J&uuml;rgen Sauler

Wolfgang Fischer

Heiko Ridderbusch

Robert Sloboda

Anton Kantschar

Michael B&auml;uerle

Crina Vlad

Kai Dierssen

Werner H&auml;ming

Li Luo

Martin Streib

Stefan Unland

Haris Hamedovic

Detlef Heinrich

Andreas Pape

Taskin Ege

Kristina Eberle

Thomas Edelmann

Stefan Polach

Silke Haag

Juergen Wuerth

Johannes Hoegl

Andreas Meinken

Erkan Danisman

Uwe Nusser

Jochen Goebels

Jan Boettger

Rudi Eichhorn

Stefan Kempf

Marcus Leuz

Geetha Srinivasan

Rolf Petzendorfer

Thorsten Klinkhammer

Oscar Torno

Michael Meister

Frédéric Gabel

A method and a device for controlling knocking in an internal combustion engine. A knock signal of a cylinder of the internal combustion engine is measured by a knock sensor and from that, a knock feature is generated. The knock feature is compared to a reference level in order to classify a combustion as a knocking or non-knocking combustion. The reference level is formed in consideration of a plurality of corrected knock features, the corrected knock features being formed from the knock features by determining map values from a program map as a function of operating parameters of the internal combustion engine and linking them additively, or by carrying out a low-pass filtering, or by determining map values from a program map as a function of operating parameters of the internal combustion engine and linking them additively and carrying out a low-pass filtering.

Method and device for controlling knocking in an internal combustion engine

A method and a device are provided for controlling an internal combustion engine, a knock sensor being provided for acquiring combustion signals of the internal combustion engine. Devices are also provided that, during running operation of the internal combustion engine, select operating ranges of the internal combustion engine that are suitable for a determination of fuel quality, and carry out a determination of the fuel quality in these ranges on the basis of signals of the knock sensor.

Method and device for controlling an internal combustion engine

A method and a device for knock control of an internal combustion engine, a knock signal of a cylinder of the internal combustion engine being measured by a knock sensor and, on the basis thereof, a knock intensity is generated. The knock intensity is compared to a reference level in order to classify a combustion as a knocking or non-knocking combustion. Moreover, an arrangement is provided, which takes the level of the knock intensity into account for the determination of the reference level.

Method and device for knock control of an internal combustion engine

A method and a device are provided for knock recognition of an internal combustion engine, which device Fourier-transforms, weights in frequency-dependent fashion, and sums a signal of a knock sensor in order to produce a first knock signal. Here, from a multiplicity of first knock signals, a concentration point of the multiplicity of the first knock signals is determined, and a first offset value is subtracted from the first knock signal in order to form a second knock signal, the first offset value being ascertained from the concentration point of the multiplicity of the first knock signals, and a second knock signal that has a value below zero being set to the value zero. The further-processed second knock signal is then evaluated as knocking or non-knocking.

Method and device for knock recognition of an internal combustion engine

A method and a device for controlling a combustion of an internal combustion engine are provided, including an arrangement, which generates a signal for the intensity of the combustion in a combustion chamber of the internal combustion engine from a sensor signal of the internal combustion engine. The intensity is compared to a reference level, which was formed from intensities of preceding combustions in the combustion chamber by moving average calculation. An irregular combustion is detected if the intensity exceeds the reference level in a predetermined manner, and then at least one operating parameter of the internal combustion engine is shifted in the direction of an avoidance of the irregular combustion. Following an irregular combustion, the averaging for forming the reference level is accelerated for a specified duration.

Method and device for controlling a combustion of an internal combustion engine

A method for knock control of an internal combustion engine capable of being operated using a water injection system, in which at least one parameter of the knock control is determined as a function of a variable connected to the water injection system, in particular the water content.

Method for knock control of an internal combustion engine

A method for diagnosing a water injection into a combustion chamber of an internal combustion engine, a knock susceptibility of the internal combustion engine being ascertained from signals of a knock sensor and the knock susceptibility being evaluated in order to diagnose the water injection.

Method and apparatus for diagnosing a water injection into a combustion chamber of an internal combustion engine

A method for handling uncontrolled combustions in an internal combustion engine of a motor vehicle, the uncontrolled combustions occurring independently of the ignition by a spark plug and being detected in or at the internal combustion engine. To allow a rapid yet reliable reduction of uncontrolled combustions in an internal combustion engine in order to protect the internal combustion engine from damage, the number of detected uncontrolled combustions in a monitoring period is determined and compared to a threshold value. A temperature in a combustion chamber of the internal combustion engine is dropped if the threshold value is exceeded.

Method and device for handling uncontrolled combustions in an internal combustion engine of a motor vehicle

A method for recognizing uncontrolled combustions in an internal combustion engine which occur independently of the ignition by a spark plug. The pressure oscillations in the combustion chamber triggered by the combustion are detected and evaluated. To allow identification at any time of an uncontrolled combustion prior to ignition by the spark plug and/or prior to the normal combustion initiation for a given ignition point, the rotational speed of a crankshaft of the internal combustion engine which is influenced by the pressure oscillations, is evaluated.

Method and device for recognizing uncontrolled combustions in an internal combustion engine

A method for testing the operability of a tank shutoff valve of a fuel tank system which is controlled by valves includes performing defined triggering of the tank shutoff valve and simultaneous introduction of an overpressure or partial vacuum into the fuel tank system via a pressure source, and the operability of the tank shutoff valve is determined on the basis of a variable which characterizes the introduction of the overpressure or partial vacuum.

Method for testing the operability of a tank shutoff valve of a fuel tank system

An apparatus for furnishing an amplified sensor signal of a knock sensor, encompassing an analog amplifier for amplifying the sensor signal in accordance with a first definable gain factor; an analog/digital converter for digitizing the amplified sensor signal into a digitized sensor signal; a digital amplifier for amplifying the digitized sensor signal in accordance with a second definable gain factor; and a control unit in order to furnish the first and the second gain factor as a function of a baseline sound level of the sensor signal, the baseline sound level corresponding to the component of the solid-borne sound signal generated in normal operation without knocking.

Knock detection system and method for an amplifier control for a knock signal

In the field of knock detection in a combustion engine, a method and a device detects and controls the knock by adapting the gain of an amplifier which amplifies the knock sensor signal. The gain of the amplifier is adapted based on analysis of a set of samples from the knock sensor so that the amplification of the knock sensor signal across the entire measuring window is optimum and the complete ADC evaluation range can be utilized better.

Knock detection device for a cobustion engine and a method for a combustion knock detection

A method for monitoring a knock control and a device for knock control of an internal combustion engine are provided, in which digital knock data are obtained for the knock control in that the acquisition of data of a knock sensor, converted from analog to digital, is started at a start angle of the internal combustion engine and ended at an end angle. The digital knock data are evaluated so as to detect a malfunction in the acquisition of the digital knock data.

Method for monitoring a knock control, and device for knock control of an internal combustion engine

A signal processing device and a control unit for cooperating with a signal processing device are described, the signal processing device being designed for processing knocking signals of an internal combustion engine which are provided by knocking sensors. A comprehensive check for errors is performed. The filter coefficients provided for a filter in the signal processing device are checked for consistency. Furthermore, messages between control unit and signal processing device are checked for transmission errors. If errors occur, alternate measures are initiated.

Signal processing device and control unit for cooperating with a signal processing device

A device and a method for assigning at least two knock sensors to at least two cylinders of an internal combustion engine are provided. An arrangement for comparison is provided, which implements the assignment of the knock sensors to the cylinders by comparing at least two characteristic acoustic signals.

Device and method for assigning knock sensors to cylinders of an internal combustion engine

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Stuttgart, Germany

Carsten Kluth