Robert Boschgmbh

Robert Bosch Gbmh

Klaus Joos

Markus Amler

Thomas Frenz

Jens Wolber

Hansjoerg Bochum

Achim Hirchenhein

Werner Hess

Alexander Schenck Zu Schweinsberg

Holger Rapp

Ruediger Weiss

Haris Hamedovic

Helerson Kemmer

Georg Mallebrein

Joerg Kuempel

Helmut Rembold

Winfried Moser

Timm Hollmann

Eberhard Schnaibel

Ernst Wild

Martin Streib

Udo Hafner

Wolfgang Fischer

Anh-Tuan Hoang

Karsten Kroepke

Werner Haeming

Karl Gmelin

Thomas Huber

Stefan Tumback

Werner Mezger

Ulrich Steinbrenner

Rene Schenk

Klaus Mueller

Peter Baeuerle

Andreas Eichendorf

Uwe Mueller

Peter Ropertz

Nikolaus Benninger

Matthias Philipp

Bernd Kesch

Christof Vogel

Klaus Hirschmann

Matthias Schumacher

Rolf Reischl

Matthias Kuesell

Manfred Kirschner

Klaus Lang

Kersten Wehmeier

Gerhard Benz

Peter Schenk

Juergen Pantring

Thorsten Allgeier

Siamend Flo

Joerg Koenig

Ruben Schlueter

Michael Bauer

Bernd Wichert

Jens Neuberg

Harry Friedmann

Gerd Grass

Andreas Koch

Christian Reschke

Stephanie Wirth

Karsten Hinn

Ralf Klein

Ralf Daeubel

Edmund Schaut

Hans Deichsel

Bernd Schott

Ernst-Walter Lang

Federico Buganza

Hans-Friedrich Schwarz

Nikolaus Simon

Ingo Richter

Kai Jakobs

Pierre-Yves Crepin

Burkhard Hiller

Mathias Rollwage

Claus Schneider

Karsten Mann

Traugott Degler

Uwe Schaupp

Christian Tischer

Norbert Miller

Manfred Dietrich

Frank Nitsche

Klaus-Dieter Hufnagel

Anwar Abidin

Carlos Koster

Volkmar Goldschmitt

Juergen Pfeiffer

Silke Seuling

Juergen Arnold

Bernd Herrmann

Jorg Lange

Emilie Hincker-Piocelle

Bernd Kudicke

Hans-Peter Lehr

Erkan Danisman

Tobias Flaemig-Vetter

Wolfgang Saatmann

A fuel distributor, which is in particular used as a fuel distribution rail for mixture-compressing, spark-ignited internal combustion engines, including a base body, at which at least one high-pressure inlet and multiple high-pressure outlets are provided. An insert element is furthermore provided that is situated in an interior of the base body. In the interior, the insert element separates an inflow area, which extends from the high-pressure inlet to the high-pressure outlets, at least essentially from a damping area. The insert element is designed as a thin-walled insert element that forms a divider extending through the interior at least from the high-pressure inlet to the high-pressure outlets.

Fuel distributor for internal combustion engines

A method is described for operating an electric fuel pump constituting a low-pressure pump in a fuel supply system for an internal combustion engine, having a high-pressure reservoir and a high-pressure pump, of a motor vehicle. The electric fuel pump is operated at least temporarily, during a time period during which the internal combustion engine is switched off during operation of the motor vehicle, with a minimum value for a control application variable for the electric fuel pump.

Method for operating an electric fuel pump

A method for ascertaining a setpoint value for a manipulated variable for activating a low-pressure pump in a fuel supply system for an internal combustion engine, including a high-pressure accumulator and a high-pressure pump including a volume control valve, the low-pressure pump being activated in such a way that a pressure provided by the low-pressure pump is reduced across multiple intake phases, in which fuel delivered by the low-pressure pump is sucked in by the high-pressure pump via the volume control valve, the volume control valve being at least temporarily held in a closed position during each of the multiple intake phases, in which it may be opened from a side facing the low-pressure pump, and the setpoint value being ascertained, taking into account an activating value of the manipulated variable, in which a drop in the delivery rate of the high-pressure pump is detected.

Method for ascertaining a setpoint value for a manipulated variable for activating a low-pressure pump

A method for ascertaining a setpoint value for a manipulated variable for the actuation of a low-pressure pump in a fuel-supply system for an internal combustion engine having a high-pressure accumulator and a high-pressure pump, the high-pressure pump being operated in a full delivery mode, and the low-pressure pump being actuated so that a pressure provided by the low-pressure pump is reduced, and the setpoint value at which a dip in a delivery quantity of the high-pressure pump is detected is ascertained while taking into account an actuation value of the manipulated variable.

Method for ascertaining a setpoint value for a manipulated variable for actuating a low-pressure pump

A method is described for diagnosing errors in an internal combustion engine in which fuel is injected from a high-pressure accumulator into associated combustion chambers with the aid of multiple fuel injectors, a first value (R) which is representative of a static flow rate of fuel through one of the fuel injectors being ascertained, a second value (&#x394;n) which is representative of a running smoothness of the internal combustion engine being ascertained, if at least one of the two values (R, &#x394;n) deviates from the particular associated reference value (R', &#x394;n), an error (F) being deduced, and the error (F) being assigned to the fuel injector and/or at least one further component and/or at least one operating phase of the internal combustion engine on the basis of deviations of the two representative values (R, &#x394;n) from the particular associated reference value (R&#x2032;, &#x394;n).

Method for diagnosing errors in an internal combustion engine

A method for ascertaining a correction value for fuel metering of a fuel injector of an internal combustion engine, in which fuel is injected from a high-pressure accumulator into a combustion chamber with the aid of the fuel injector, the fuel being injected into the combustion chamber in multiple separate injection procedures during one work cycle, a value representative of a static flow rate through the fuel injector being ascertained by ascertaining, for at least one of the multiple separate injection procedures, a ratio of a pressure change caused in the high-pressure accumulator by the at least one of the multiple separate injection procedures and an associated duration characteristic for the at least one of the multiple separate injection procedures being ascertained, and the correction value being ascertained based on a comparison of the representative value to a comparison value.

Method for ascertaining a correction value for fuel metering of a fuel injector

A method for recognizing a state change of a fuel injector of an internal combustion engine, in which fuel from a high-pressure accumulator is injected into a combustion chamber with the aid of the fuel injector. A value that is representative of a static flow rate of fuel through the fuel injector is ascertained. A state change of the fuel injector is deduced when the representative value differs from a comparative value by more than a first threshold value.

Method for recognizing a state of change of a fuel injector

A method for ascertaining a correction value for a fuel metering of a fuel injector of an internal combustion engine, in which fuel is injected from a high pressure accumulator into a combustion chamber with the aid of the fuel injector, a value which is representative for a static flow rate through the fuel injector being ascertained by way of ascertaining, during at least one injection process of the fuel injector, a ratio of a pressure difference occurring in the high pressure accumulator as a result of the injection process and an associated duration which is characteristic for the injection process, and the correction value being ascertained on the basis of a comparison of the representative value with a comparative value.

Method and device for ascertaining a correction value for a fuel injection quantity

A method is described for controlling the metering of fuel. A feature, which characterizes the switching point in time of a valve, is ascertained based on a measured signal curve. The feature is fed as an actual variable to a controller. A criterion of the feature is ascertained, the controller taking the criterion of the feature into account.

Method for controlling metering of fuel

A method is described for determining an opening delay of a fuel injector in which by activating a solenoid with the aid of an armature, a valve needle may be opened wherein a mathematical model is used which includes an activation duration of the solenoid as an input variable and a respective opening delay as an output variable.

Method for determining an opening delay of a fuel injector

A method for operating an internal combustion engine having two or more cylinders to which fuel can be supplied via an injection valve, it being possible to carry out a measurement injection for a cylinder in order to determine and/or adapt a characteristic quantity of the injection valve, and all the cylinders being ignited in the course of an ignition cycle. To improve the operating characteristics, a measurement injection is carried out for those cylinders that are contained in a specifiable selected set selected from all the cylinders.

Method for operating an internal combustion engine

A method for assessing an injection behavior of at least one injection valve of an internal combustion engine includes putting the internal combustion engine into a special operating mode defined by control parameters and operating the engine in the special operating mode during a diagnostic time period, at least one operating parameter of the internal combustion engine being determined at least during the diagnostic time period, and at least one quantity characterizing the injection behavior of the at least one injection valve being evaluated at least during a segment of the diagnostic time period and being evaluated on the basis of the at least one operating parameter.

Method for assessing an injection behaviour of at least one injection valve in an internal combustion engine and operating method for an internal combustion engine

A method for activating an injector in a fuel injection system in an internal combustion engine, the fuel injection system including a plurality of injectors and a quantity of fuel injected with the aid of an injector being a function of the activation period of the injector. An injector-individual correction value for the activation period is ascertained for at least one injector as a function of a pressure and a temperature of the fuel to be injected and the activation for this injector takes place under consideration of the injector-individual correction value.

Method for activating an injector in a fuel injection system in an internal combustion engine

A method for operating a valve actuated by way of an actuator, in particular a fuel injection valve of an internal combustion engine of a motor vehicle, in which a first delay time is identified, which time characterizes a time difference between a point in time of a first change in an energization signal for the actuator and a point in time of a first change in the operating state of the valve corresponding to the first change in the energization signal. According to the present invention, from the first delay time at least one second delay time of the valve is inferred, which latter time characterizes a time difference between a point in time of a second change, different from the first change, in the energization signal and a point in time of a second change in the operating state of the valve corresponding to the second change in the energization signal.

Method and control tool for operating a valve

A method for operating a valve, in particular a fuel injector of an internal combustion engine of a motor vehicle, in which an auxiliary variable is obtained as a function of at least one electrical operating variable of an electromagnetic actuator driving a component of the valve, in particular a valve needle, and in which the auxiliary variable is checked for the presence of a predefinable characteristic. A reference variable is ascertained as a function of the auxiliary variable, the auxiliary variable is modified as a function of the reference variable to obtain a modified auxiliary variable, and the modified auxiliary variable is checked for the presence of the predefinable characteristic.

Method and control unit for operating a valve

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Walheim, Germany

Klaus Joos