Robert Boschgmbh

Werner Haeming

Oskar Torno

Carsten Kluth

Michael Baeuerle

Axel Heinstein

Stefan Unland

Iwan Surjadi

Robert Sloboda

Steffen Franke

Juergen Sauler

Federico Buganza

Ulrich Rothhaar

Wolfgang Hilbert

Robert H Entenmann

Wolfgang Fischer

J&uuml;rgen Sauler

Helerson Kemmer

Anton Kantschar

Crina Vlad

Georg Mallebrein

Martin Streib

Klaus Joos

Christian Grosse

Heiko Ridderbusch

Haris Hamedovic

Matthias Philipp

Andreas Baumann

Taskin Ege

Andreas Pape

Kai Jakobs

Pierre-Yves Crepin

Thomas Edelmann

Martin Ludwig

Juergen Pfeiffer

Carlos Koster

Silke Seuling

Juergen Wuerth

Michael Gundlach

Kai Dierssen

Klaus Schenk

Andreas Meinken

Emilie Hincker-Piocelle

Erkan Danisman

Jochen Goebels

Stefan Kempf

Jan Boettger

Rudi Eichhorn

Li Luo

Geetha Srinivasan

Rolf Petzendorfer

Oscar Torno

Sigfrid Hafner

Frédéric Gabel

Stefan Bollig

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

In a method for operating an injection valve, in particular a fuel injector of an internal combustion engine of a motor vehicle, one component of the injection valve, particularly a valve needle, is disposed in a manner allowing movement relative to other components of the injection valve, and preferably is able to be driven at least partially by an actuator. A structure-borne-noise signal is detected by a structure-borne-noise sensor, and the structure-borne-noise signal is evaluated in order to infer an operating state of the movably disposed component.

Method and control unit for operating an injection valve

A method is provided for diagnosing the operability of fuel vapor intermediate stores (), in particular of activated carbon filters, in tank-venting systems with at least one tank () and at least one fuel vapor intermediate store (). In this case an actual change degree of filling of the fuel vapor intermediate store () is determined as a consequence of absorption or desorption processes of gaseous hydrocarbons in the fuel vapor intermediate store (). The actual change in degree of filling is compared with a desired change in degree of filling and, from the comparison, a conclusion about the operability of the fuel vapor intermediate store () is drawn.

Diagnosis of the operability of fuel vapour intermediate stores

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

The invention deals with a method to determine the fuel composition of a fuel mixture from a first fuel and a second fuel for the operation of an internal combustion engine, wherein the first and the second fuel have different octane numbers and wherein the internal combustion engine has at least one knock sensor and a closed-loop knock control. Provision is made according to the invention for the composition of the fuel mixture to be determined by means of an output signal of the knock sensor. Provision is made in many cases for the knock sensor to already be in the internal combustion engine, so that it does not present any additional expenditure of money or effort. Because the octane number of the fuel mixture is determined by the mixing ratio of the fuels involved, which have different octane numbers, in retrospect the composition of the fuel mixture can be suggested from the signal of the knock sensor under suitable operating conditions.

Method to determine a fuel composition

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

A device and a method for processing data, in particular measuring data of a knock sensor of an internal combustion engine, are provided, the data being obtained by sampling an analog signal. The sampled values are combined to form data blocks and then processed as data block by a computing device.

Device and method for processing data that are obtained by sampling an analog signal

A method and a device for knock control of an internal combustion engine, in which an adjustment of the ignition angle takes place. When knocking occurs, the ignition angle is retarded and then advanced again. An increasing advance adjustment of the ignition angle reduces the rate of the advance adjustment.

Method and device for knock control of an internal combustion engine

Devices and methods for knock detection and knock control are described, in which, in addition to the customary component parts, the knock-detection circuit has a filter with switchable filter characteristic. The switchover of the filter characteristic, i.e. the shift, for example, of the mid-frequency of the filter, is carried out taking into consideration specifiable quantities or parameters, for instance, as a function of rotational speed. During the switchover of the filter characteristic, i.e. the shift of the mid-frequency, problems could occur in the knock detection; that is why measures are proposed which carry out the knock detection according to a special knock-detection algorithm during a switchover phase lasting a specifiable time.

Knock recognition in internal combustion engines with modifications by changing filter characteristics or cylinder specific changes

A device for signal evaluation is described, in particular for knock recognition in an internal combustion engine, in which the signals forwarded by sensors are evaluated digitally and error recognition is carried out that performs two different test functions, whereby a first test function supplies a test pulse at a specifiable location, and the second test function clears the sensor signals, and the reaction of both the analog and digital parts of the circuit are monitored.

Device for error recognition in a digital signal evaluation unit

The method for knock detection includes establishing that knock is occurring in the internal combustion engine when the amplified knock signal exceeds a predetermined reference level in a predetermined manner. The reference level is determined on the basis of individual cylinders and the increase in the reference level is limited when a new reference level leaves a predetermined reference level range or the gradient of the sound increase exceeds a predetermined threshold value. For determination of the reference level range and/or the threshold for the gradient average values of the signals originating from the sound of other cylinders are considered.

Method for detecting knock in an internal combustion engine

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Neudenau, Germany

Werner Haeming