Robert Boschgmbh

Robert Sloboda

Werner Haeming

Michael Baeuerle

Oskar Torno

Stefan Unland

Iwan Surjadi

Ulrich Rothhaar

Wolfgang Hilbert

Carsten Kluth

Robert H Entenmann

Anton Kantschar

Andreas Meinken

Kai Dierssen

Klaus Schenk

Jochen Goebels

Stefan Kempf

Jan Boettger

Rudi Eichhorn

Steffen Franke

Romuald Fries

Federico Buganza

Karl Dums

Thomas Edelmann

Matthias Biehl

Joerg Bonitz

Goetz Stelzenmueller

Frederic Gabel

Oscar Torno

Elvira Perless

Frédéric Gabel

Sigfrid Hafner

Stefan Bollig

A method for evaluating abnormal combustion events of an internal combustion engine of a motor vehicle by regression calculation of a physical reference variable, in which method a recognition variable of the abnormal combustion event is calculated from a measured sensor signal. In a method with which abnormal combustion processes of the internal combustion engine can be reliably recognized and classified at all operating points, a stepwise system is used for regression calculation of the recognition variable, in which system at least one reference variable that corresponds to a measured reference variable of the sensor signal is calculated from the sensor signal.

Method and apparatus for evaluating abnormal combustion events of an internal combustion engine of a motor vehicle by regression calculation of a physical variable

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

A method for computing an ignition angle of an internal combustion engine as a function of the operating conditions of the engine and knock signals K, which indicate knocking combustion in the engine. If knock occurs, the ignition angle is retarded. If knock stops for a first period, the ignition angle is advanced again. Advance of the ignition angle is limited on the basis of the first period. If knock stops for a second period, which exceeds the first period, the ignition angle is further advanced.

Method for computing an ignition angle of an internal combustion engine

A method for error detection during an evaluation of sensor signals, in particular during an evaluation of output signals of knock sensors in an internal combustion engine, with at least one sensor and an evaluating device connected therewith, the method includes the steps of forming at least one variable reference level from output signals of a sensor or sensors; comparing the variable reference level for error detection with upper and/or limiting values; making a conclusion about an error in the case of a predeterminable exceeding of the upper and/or exceeding of the lower limiting value by the actual reference level; and forming at least one limiting value in dependence on preceding reference values.

Method of error detection during evaluation of sensor signals

A method for controlling knocking in internal combustion engines. According to this method, a map ignition angle is determined on the basis of detected operating parameters, to which a correction value is additively applied when knock events occur. The correction value is a function of a knock frequency.

Method for regulating knocking in ignition systems of internal combustion engines

Method for determining the advance ignition angle internal combustion

Device for detecting knocking and regulation of an internal combustion

Knock control process for an internal combustion engine

A method for detecting knocking provides for weighting or limitation of the knocking threshold. For this purpose, on the one hand a normal range of the reference level is defined and in the case of a deviation from this normal range the knocking threshold is multiplied by a weighting factor less than 1 and, alternatively, the knocking threshold is limited when a prescribable limit value is reached.

Method for detecting knocking

A system for controlling the charging of an internal combustion engine contains an integral controller. If appropriate, a proportional controller and/or a differential controller may also be present. The integration, carried out by the integral controller, of the control error is limited to a prescribable limit value in order to avoid severe overshoots. Various limit values for steady-state operating states and for dynamic operating states can be prescribed. The dynamic limit value can be provided with corrections as a function of characteristic operating variables and with an adaptive correction and can be additionally increased by a safety interval.

System for controlling a charging of an internal combustion engine

Method for the adaptive knock control of an internal combustion engine

Device for detecting faults in an apparatus for detecting knocking

Protection system for a pressure-charged internal combustion engine and

A system for automatically controlling the supercharging of an internal combustion engine by controlling a variable parameter signal, such as pressure, air quantity, or air mass which characterizes the status of the internal combustion engine supercharging operation. The system includes a closed-loop control system. To optimize supercharging performance the response characteristic of the control system is determined as a function of the rotational frequency of the internal combustion engine and an operating parameter signal which characterizes the dynamic output response of the internal combustion engine and of the supercharger. In the case of large system deviations, the operating parameter signal is derived from the actual measured value of the control variable. The control system raises the value of the operating parameter signal when the control system is deactivated to avoid making an incorrect determination of the value of the operating parameter signal when the control system is then immediately reactivated. When small system deviations occur, the control system operates based on the assumption that the engine and supercharger are operating at a steady-state condition. Under such conditions, the control system uses a stored value for the value of the operating parameter signal.

Automatic supercharging control system for an internal combustion engine

A knock sensor for indirect or direct fixing to an internal combustion engine has a housing (10) with a pressure sleeve (11) on the outer side of which a piezoceramic disk, a seismic mass (16), the contact disks (14), and the insulating disks (13) are arranged. The insulating disks (13) or the piezoelectrical disk (15) are or is made slightly electrically conductive so that the voltage spikes which occur due to the pyroelectrical effect can be easily eliminated. In this way, faulty measuring and interference can be avoided in the electrical circuit connected to the knock sensor.

Knock sensor

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Markgroeningen, Germany

Robert Sloboda