Robert Boschgmbh

Eberspächer Exhaust Technology Gmbh & Co. Kg

Federico Buganza

Werner Haeming

Carsten Kluth

Oskar Torno

Georg Mallebrein

Kai Jakobs

Pierre-Yves Crepin

Juergen Pfeiffer

Carlos Koster

Emilie Hincker-Piocelle

Klaus Joos

Wolfgang Fischer

Helerson Kemmer

Robert Sloboda

Taskin Ege

Viktor Koch

Anton Kantschar

Kai Dierssen

Andreas Meinken

Rudi Eichhorn

Erkan Danisman

Jochen Goebels

Stefan Kempf

Jan Boettger

Geetha Srinivasan

Frédéric Gabel

Selcuk Serbetci

Jan Küger

A system has a sound generator () that generates superimposed sound to a sound to be manipulated. An error sensor () measures sound and outputs a corresponding feedback signal (e'(n)). A signal generator () generates a sound signal (y(n)). A controller () generates a control signals (&#x3bb;(n)) and (&#x3bb;(n)). The adder () subtracts one control signal (&#x3bb;(n)) from the feedback signal (e&#x2032;(n)) and outputs a modified feedback signal (en(n)) to the signal generator (). A weighter () weights the sound signal (y(n)) with the control signal (&#x3bb;(n)) and outputs the weighted sound signal (y&#x2032;(n)). The generated sound signal (y(n)) is a function of the modified feedback signal (e(n)). The controller () generates the control signals (&#x3bb;(n), &#x3bb;(n)) such that a value of the amplitudes of the feedback signal (&#x2225;e&#x2032;(n)&#x2225;) corresponds to a predefinable value (&#x394;).

System and method for actively influencing sound

A system includes a sound generator () that generates sound superimposed to sound to be manipulated. An error sensor () measures superimposed sound and outputs a corresponding feedback signal (e'(n)). A signal generator () generates a sound signal (y(n)). A controller () generates a control signal (&#x3bb;(n)) representing a value of a sequence of rational numbers. A weighter () weights the generated sound signal (y(n)) with the control signal (&#x3bb;(n)) and inverts it. An adder () adds the weighted/inverted sound signal to the feedback signal (e&#x2032;(n)) and outputs a modified feedback signal (e(n)) to the signal generator (). A weighter () weights the generated sound signal (y(n)) with the difference from one and with the control signal (&#x3bb;(n)) and outputs the sound signal y&#x2032;(n). The generated sound signal (y(n)) is a function of the modified feedback signal (e(n)).

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

The invention deals with a method for operating an internal combustion engine with engine oil as the lubricant, wherein a fuel mass flow outgassing from the engine oil is ascertained and is taken into account via a map-based pilot control during the metering of a quantity of fuel supplied to the internal combustion engine and wherein a fuel/air ratio supplied to the internal combustion engine is determined. Provision is made in the method according to the invention for a mass flow offset determined from the deviation of the fuel/air ratio supplied to the internal combustion engine from a nominal value to be taken into account when the metering of the quantity of fuel supplied to the internal combustion engine occurs during an effective duration of the map-based pilot control. The mass flow offset takes the deviation into account, which remained after the correction by a map-based pilot control of the quantity of fuel metered, on the basis of the modeled outgassing of fuel from the engine oil, and said mass flow offset balances the lambda controller in this way. The mass flow offset can by way of example have the effect of shortening the duration injection. The mixture deviations as a result of different boiling curves of the components of the fuel blend, which cannot be completely taken into account by the map-based pilot control under all operating conditions of the internal combustion engine, can in this way be compensated.

Method for taking the outgassing of fuel from the engine oil of an internal combustion engine into account

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 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

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Esslingen, Germany

Federico Buganza