Robert Boschgmbh

Winfried Moser

Ernst Linder

Martin Klenk

Franz Rieger

Klaus D Muller

Matthias Philipp

Georg Mallebrein

Horst Franke

Christian Klinke

Christian Koehler

Juergen Foerster

Michael Oder

Dirk Mentgen

Eckart Damson

Helmut Denz

Klaus Joos

Rudolf Heinz

Rainer Burkel

Katsuoki Itoh

Heinz Britsch

Thomas Brosi

Eberhard Schnaibel

Helmut Rembold

Werner Herden

Udo Hafner

Erich Zabler

Konrad Eckert

Werner Hess

Cornelius Peter

Lutz Reuschenbach

Erich Schneider

Reinhard Latsch

Klemens Grieser

Helmut Maurer

Ferdinand Grob

Markus Amler

Karl Gmelin

Thomas Frenz

Ruediger Weiss

Hansjoerg Bochum

Uwe Mueller

Andreas Eichendorf

Christof Vogel

Rene Deponte

Christof Ott

Hans Schlembach

Matthias Kuesell

Gerhard Benz

Heinz Moller

Rainer Bone

Wilhelm Hertfelder

Steffen Schumacher

Nikolaus Simon

Lothar Krauter

Anton Kantschar

Klaus-Peter Schnelle

Helmut Gross

Anwar Abidin

Joerg Lange

Kurt Ingrisch

Klaus Bottcher

Edmund Schaut

Karl-Otto Linn

Bernd Herrmann

Jorg Lange

Volkmar Goldschmitt

Wolfgang Hoptner

Erich Breuser

Karl-Heinz Gerlings

Klaus D M/u/ Ller

Harald Lang

Christoph Franke

Martin Zipperer

Hans P Lenz

Gerd Auracher

Jog Lange

Jochen Gohre

Gerhard Auwaerter

Rainer Schubler

Eckard Damson

Eckhart Damson

Hermann Schneider

Ingo Bartig

Hansjoachim Mamisch

Klaus Benninger

A mechanical system has a component, which is movable under friction. An oscillating micromotion (dither) is impressed upon the component, which, if necessary, is added to a non-oscillating base motion of the component. It is provided that the micromotion (without the base motion that is additional, if necessary) is faster within a period of the oscillation in the one direction and is of shorter duration than in the opposite direction (asymmetrical dither).

Method for operating a mechanical system, particularly a proportioning valve

A method for cooling a fuel injection system and fuel injection systems are proposed that improve the hot-starting performance of the internal combustion engine.

Method and apparatus for cooling a fuel injection system

An internal combustion engine is provided with an injection valve with which fuel can be injected directly into a combustion chamber either during a compression phase in a first operating mode or during an intake phase in a second operating mode. In addition, a control unit is provided for shifting between the two operating modes and for differentiated control and/or regulation of the performance quantities that influence the actual torque of the internal combustion engine as a function of a setpoint torque in both operating modes. A change in the actual torque during a shifting operation is determined by the control unit, and at least one of the performance quantities is influenced by the control unit as a function thereof.

Internal combustion engine, a control element for the internal combustion engine, and method for operating the internal combustion engine

An internal combustion engine in for a motor vehicle in ( ) is described. The internal combustion engine ( ) has an injection valve with which fuel can be injected directly into a combustion chamber either during a compression phase in a first operating mode or during an intake phase in a second operating mode. In addition, a control unit is provided for shifting between the two operating modes and for differential control and/or regulation of the performance quantities that influence the actual moment of the internal combustion engine in both operating modes as a function of a setpoint moment. A change in the actual moment during a shifting operation is determined by the control unit and at least one of the performance quantities is influenced by the control unit as a function thereof.

Method of operating an internal combustion engine

An internal combustion engine, in particular for a motor vehicle, is described. The internal combustion engine is equipped with an injection valve with which fuel can be injected directly into a combustion chamber either, in a first operating mode, during a compression phase or, in a second operating mode, during an intake phase. Also provided is a control device for switching between the two operating modes and for differing open-loop and/or closed-loop control, in the two operating modes, of the operating variables influencing the actual torque of the internal combustion engine as a function of a reference torque. A change in the actual torque during a switchover is operation is detected by the control device and as a function thereof, at least one of the operating variables is influenced by the control device.

Method for operating an internal combustion engine

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

Method for operating an internal combustion engine, especially of an

Internal combustion engine

A fuel injection for internal combustion engines, having a valve member which is guided so that it moves axially in a valve body and uses a sealing face provided on a combustion chamber end to open and close an injection opening on the valve body. A piezoelectric actuator includes a piezoelectric stack, which changes in length with the action of a control voltage, is coupled to the combustion chamber end of the valve member to actuate the valve member. In order to prevent an interference with a precise adjustment motion of the valve member of an unwanted length change in the piezoelectric stack, a clamping device is provided which fixes the end of the piezoelectric stack remote from the valve member in its axial position during the injection phase of the fuel injection valve, and permits an axial compensation for play at the piezoelectric stack during an injection pause.

Clamping device for a piesoelectric actuator of a fuel injection valve

A metering valve for metering a fluid for a fuel injection valve for internal combustion engines, with a hydraulic displacement amplifier for converting the actuating displacement of a piezoelectric actuator into an increased stroke of the valve needle. Integrating the displacement amplifier spatially into the valve housing in an 'O valve' to give a small overall volume is served by providing the lifting piston of the displacement amplifier with an end section of reduced diameter which projects into a recess in the operation piston of the displacement amplifier. A Belleville spring lying in the amplifier chamber bounded by the pistons presses the operating piston against the actuator, and a helical compression spring arranged in the recess concentrically to the end section presses the lifting piston against the valve needle.

Metering valve for metering a fluid

In a cylinder-selective injection system for an internal combustion engine, there are cylinder-selective injection suppressions. Subsequent to the suppressions, restoring added quantities specific to an individual cylinder are generated, whose initial value is dependent upon the number of suppressed injections for the cylinder in question, and whose notching-down to zero is dependent upon the number of injections of the cylinder that have taken place after completion of the suppression.

Cylinder-selective injection system

The invention is directed to a method and an arrangement for controlling the supply of secondary air to the exhaust gas of an internal combustion engine. A method for diagnosing this arrangement is also provided. The arrangement includes an electrically operated secondary air pump which can be operated in at least two stages in dependence upon operating parameters of the engine. In this way, the supply of secondary air can be finely adapted to the actual value of the exhaust gas quantity supplied by the engine. This fine adaptation is determined by the number of stages. Resistors are switched into the current supply of the secondary air pump for the drive which has at least two stages.

Method and arrangement for controlling the supply of secondary air for

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

The emission of toxic materials when starting an internal combustion engine equipped with a catalytic converter and a secondary air pump can be further reduced with the method and arrangement of the invention. This reduction takes place by a switch-on of the secondary air pump under selectable conditions which include a warm start of the engine. The danger of overheating the catalytic converter by the operation of the secondary air pump for a warm engine is taken into account by a variable switch-on duration of the secondary air pump which can be realized by a counting procedure having an increment dependent on operating parameters.

Method and arrangement for controlling the operation of a secondary air

Apparatus and process for measuring the irregular running of an internal

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Ludwigsburg, Germany

Winfried Moser