Robert Boschgmbh

Audi Ag

Martin Klenk

Winfried Moser

Anton Kantschar

Wolfgang Wimmer

Ernst Linder

Helmut Denz

Werner Herden

Matthias Kuesell

Eckart Damson

Erich Schneider

Albert Gerhard

Heinz Moller

Hubert Bischof

Christian Klinke

Eberhard Schnaibel

Michael Baeuerle

Martin Streib

Werner Hess

Lutz Reuschenbach

Udo Sieber

Karsten Mischker

Uwe Kassner

Manfred Mezger

Michael Lehner

Klaus Ries-Muller

Otto Karl

Frieder Keller

Juergen Foerster

Andrea Lohmann

Wolfgang Borst

Rainer Bone

Dieter-Andreas Dambach

Heinz Britsch

Burkhard Hiller

Juergen Gerhardt

Kurt Ingrisch

Heinz Bohmler

Otto Holzinger

Christian Kohler

Jorg Lange

Erich Breuser

Erwin Hartung

Stefan Miller

Wolfgang Loewl

Mathias Lohse

Klaus Benninger

Werner Muller

Thomas Goelzer

Werner Mueller

Eckhart Damson

A method for operating an internal combustion engine in which combustion air is supplied to a combustion chamber of the internal combustion engine, which air is compressed with the aid of a pulse supercharger, the pulse supercharger being controlled in such a way that optionally, in a first operating mode, the combustion air is compressed in order to support a compressor of a turbocharger, or in a second operating mode, the combustion air compressed with the aid of the compressor is cooled.

Method for operating an internal combustion engine

A method and an arrangement for detecting the end of a start operation in an internal combustion engine () of a motor vehicle make it possible to distinguish the start operation from a steady-state condition of the engine () even for starters having a high starter rpm. At least one operating variable of the engine is determined which is different from the rpm thereof. The at least one operating variable is compared to a pregiven threshold value. The end of the start operation is detected when the at least one operating variable reaches or exceeds the threshold value.

Method and arrangement for detecting the end of a start operation in an internal combustion engine of a motor vehicle

A method for operating an internal combustion engine is provided, such as, for example, in a motor vehicle, in which at least two different fuels are simultaneously supplied to at least one combustion chamber of the internal combustion engine.

Method and device for operating an internal combustion engine using a plurality of fuels

The device for determining load in internal combustion engines includes a pressure sensor connected with a combustion chamber of an internal combustion engine which produces an output signal depending on a combustion chamber pressure, a crankshaft angle sensor for detection of a crankshaft angle of the internal combustion engine and a processor for determining a load of the engine from relative values of the output signal of the pressure sensor at predetermined crankshaft angles. The processor includes a device for determining the load from a pressure difference between combustion chamber pressures measured at two different predetermined crankshaft angles (x1, x2) or from two integrated pressure values. The integrated relative pressure values are obtained by integration of a pressure-proportional output signal of the pressure sensor between two different predetermined crankshaft angles.

Device for determining load in an internal combustion engine

The invention is directed to a method for high-resolution rpm detection in a multicylinder internal combustion engine having a crankshaft. Segment times (ts) are detected in which the crankshaft of the engine passes through predetermined angular regions. First corrective values are formed during overrun operation and logically coupled to the segment times (ts) so that deviations of the segment times (ts) of different segments are compensated in the overrun operation. Second corrective values outside of the overrun operation are determined on the basis of the corrected segment times and logically coupled to at least one of the corrected segment times and further processed segment times so that the deviations of the corrected segment times or the further processed segment times are compensated with each other during misfire-free operation.

Method for detecting RPM especially for detecting combustion misfires

Process for controlling the warm-up in an internal combustion engine wherein the combustion chamber pressure is obtained and evaluated, so that, using the evaluation of the combustion chamber pressure signal, the combustion is controlled so that combustion is not completed at the time the exhaust valve opens during warm-up.

Process for controlling the warm-up in an internal combustion engine

Method and arrangement for controlling an internal combustion engine

In a process for controlling the warm-up in an internal combustion engine, the combustion chamber pressure is evaluated, so that the warm-up period is divided into first and second phases that are controlled differently.

Adaption device for transmitter wheel of combustion engine

In a method and device for monitoring a secondary-air system, a first value is determined which characterizes the secondary air stream blown by the secondary-air system into the exhaust-gas channel of an internal combustion engine. On the basis of this first value, the functioning of the secondary-air system is judged. If the first value lies within a predeterminable interval, it is concluded that the secondary-air system is operating properly. If the first value, on the other hand, lies outside of this predeterminable interval, it is concluded that a malfunction is present. The first value is determined from a second value which characterizes the stream of air fed to the internal combustion engine, from the air/fuel ratio of the mixture drawn in by the internal combustion engine, and from the air/fuel ratio prevailing in the exhaust-gas channel downstream of the place of introduction of the secondary-air line.

Method and device for monitoring a secondary-air system of a motor

Misfire detection based on crankshaft fluctuation

Process for adapting mechanical tolerances of a pick-up wheel

In order to determine the fuel quantity to be fed into an internal combustion engine during each stroke of the engine, the air mass sucked into each cylinder for combustion during each intake stroke is determined based on an intake-pipe pressure. A current air mass is determined using a measured value for the intake-pipe pressure. Subsequently, during a period in which there is no change in an air intake cross-section for each cylinder, the air mass is determined using a projected intake-pipe pressure, and the fuel quantity to be fed to each cylinder during the current and subsequent intake strokes is determined based on the air mass determinations and a wall film model.

Process for determining fuel quantity

A misfire detection system for an internal combustion engine is disclosed with the system being used to evaluate wheel rpm fluctuations. This system detects a rough roadway over which the misfire detection is to be inhibited. This detection is made with the aid of wheel rpm signals; that is, signals as they are present for all motor vehicles equipped with anti-locking brake systems and for motor vehicles which utilize the wheel rpm signal for determining road speed. In motor vehicles of this kind, the advantage is provided that the wheel rpm signal has a double use. The advantage is provided that a reliable detection of a rough roadway is possible for all motor vehicles independently of whether wheel rpm signals are used for inhibiting the misfire detection or not.

Misfire detection system for an internal combustion engine

A system for detecting multiple misfires and for allocating misfires to cylinders for detected multiple misfires in a multi-cylinder internal combustion engine is so configured that the rough-running values for the individual cylinders are determined. The system then however forms sum terms with these rough-running values and, in turn, forms sums with these sum terms which sums are compared with threshold values. When at least one sum exceeds the corresponding threshold value, then this shows the presence of multiple misfires. As soon as multiple misfires are detected, the rough-running threshold values for allocating misfires to cylinders are reduced. Advantageously, the rough-running values are so modified in advance that their correction terms are influenced as little as possible by misfires. In this way, misfires can also reliably be allocated to individual cylinders when multiple misfires are present.

System for detecting misfires in an internal combustion engine

Growing community of inventors

Backnang, Germany

Martin Klenk