Robert Boschgmbh

August Faller Kg

Marco Beier

Holger Rapp

Wolfgang Stoecklein

Nestor Rodriguez-Amaya

Siegfried Ruthardt

Fabian Fischer

Stefan Stein

Mario Ricco

Matthias Horn

Martin Mueller

Philipp Wachter

Bernd Berghaenel

Oezguer Tuerker

Ralph Kober

Thomas Pauer

Markus Rueckle

Michael Mennicken

Andreas Rettich

Wilhelm Christ

Helmut Clauss

Andreas Rau

Andreas Gruenberger

Gerhard Suenderhauf

Thomas Schwarz

Andreas Koeninger

Roman Etlender

Kai Sutter

Christian Grimminger

Michael Krause

Matthias Schnell

Lars Olems

Pierre-Marie Rochas

Changyi Wang

Heike Lang

Lorenz Zerle

Frank Schmitt

Stephan Amelang

Henning Kreschel

Sebastian Laechele

Daniel Bosse

Andreas Kremer

Gerald Aydt

Torsten Burock

Jens Leister

Pierre Marie Rochas

Klemens Steinberg

Oliver Rain

Armin Rambach

Ralph Pfister

Günther Lade

Claus Thuemichen

Thomas Nierychlo

Martin Forke

Alexander Villmann

Sven Siauw

Internal combustion engine for gaseous fuels having a combustion chamber () in which gaseous fuel is burned. The gaseous fuel is kept at an operating pressure in a gas tank () and fed to the combustion chamber () via a supply line (). The combustion chamber () is connected to a fresh air line () through which ambient air is fed to the combustion chamber (). The exhaust gas from the combustion chamber () is fed to an exhaust gas catalytic converter () via an exhaust pipe (). A pressure relief line (') with a switchable release valve () branches off from the supply line (), via which gaseous fuel can be discharged from the supply line ().

Internal combustion engine for gaseous fuels

The invention relates to a method () for operating a tank device () for storing compressed fluids, having a tank (), a valve device (), a feed line (), a flow-regulating element () situated in the feed line (), and a control unit (). The valve device () comprises a magnet apparatus (), by means of which magnet apparatus () the opening and closing process of the valve device () can be controlled, the magnet apparatus () comprising a solenoid (). A characteristic map () is stored in the control unit (), in which characteristic map () reference pressure differences () with associated electrical current strengths for the solenoid () are stored, the electrical current strength being selected such that the valve device () is still open, an initial electrical current strength being stored in the characteristic map (). The method is characterised by the following steps: a. applying () the initial electrical current strength to the solenoid (); b. determining () the pressure pin the tank () and determining () the pressure pin the feed line () between the valve device () and the flow-regulating element (); c. determining () the difference between the pressure pin the tank () and the pressure pin the feed line () between the valve device () and the flow-regulating element (); d. assigning the determined difference between the pressure pin the tank () and the pressure pin the feed line () between the valve device () and the flow-regulating element () to one of the reference pressure differences () in the characteristic map () such that,—if the determined difference between the pressure pin the tank () and the pressure pin the feed line () between the valve device () and the flow-regulating element () can be assigned to one of the reference pressure differences (): i. selecting () an electrical current strength assigned to the determined reference pressure difference () for the solenoid (); ii. applying () the selected electrical current strength to the solenoid (); iii. cyclically repeating () steps a. to d.; —if the determined difference between the pressure pin the tank () and the pressure pin the feed line () between the valve device () and the flow-regulating element () cannot be assigned to one of the reference pressure differences (): returning () to step a.

Method for operating a tank device for storing compressed fluids

A gas metering valve for an internal combustion engine. The gas metering valve includes a housing in which a gas chamber is formed, which includes an inlet opening and an outlet opening. A movable valve element is situated in the gas chamber, which is movable by an electrical actuator against the force of a return spring and which cooperates with a valve seat for opening and closing the inlet opening. A blocking valve is situated between the valve element and the outlet opening, which opens in the flow direction to the outlet opening and blocks in the opposite flow direction.

Gas metering valve for internal combustion engines

The invention relates to a valve device () for a gaseous medium, in particular hydrogen, comprising a valve housing () and a solenoid armature () which is arranged in the valve housing and can move along the longitudinal axis () and which interacts with a first sealing seat () in order to open and close an outlet opening (). Furthermore, the valve housing () is equipped with a second solenoid armature () which can be moved along the longitudinal axis () and which is at least partly received in a recess () of the first solenoid armature (), and the second solenoid armature () interacts with a second sealing seat () in order to open and close an outlet opening () formed in the first solenoid armature (). The first solenoid armature () and the second solenoid armature () are additionally surrounded by a magnet device (), by means of which the first solenoid armature () and the second solenoid armature () can be moved along the longitudinal axis () using precisely one solenoid ().

Valve device for a gaseous medium, and tank device for storing a gaseous medium

The invention relates to a method for producing a valve () that can be electromagnetically actuated which method comprises an electromagnet (), an armature () that can be moved by the electromagnet (), and a valve body (), having means () for converting a movement of the armature () into an opening or closing of the valve (), wherein the electromagnet () and the armature () are inserted into the valve body (), wherein, before the electromagnet () is inserted into the valve body (), a magnetic hysteresis curve () of a combination () of the electromagnet () having a test armature () lying against said electromagnet () is recorded, the slope mof a first, substantially linear curve segment () of the hysteresis curve () is determined in the unsaturated state, and, from the slope m, the slope m* of a curve segment () of a hysteresis curve () of the finally assembled valve () having the armature () lying continuously against the electromagnet () is determined, said curve segment corresponding to the first curve segment (). The invention further relates to a method for determining the armature stroke AH, wherein the magnetic energy &#x394;E in the air gap () formed between the armature () and the electromagnet () is evaluated from the difference between the first slope mand the second slope m*.

Determining armature stroke by measuring magnetic hysteresis curves

A method for regulating a common rail injector, the method including acquiring a signal of a sensor, which signal is proportional to a pressure in a valve space of the common rail injector; evaluating a change in the signal over time in order to detect at least one operating event of the common rail injector; and modifying at least one operating variable of the common rail injector as a function of the at least one operating event, the at least one operating variable being selected from an opening duration, a closing duration, an opening point in time, and a closing point in time of a switching valve of the common rail injector, and from an opening duration, an opening point in time, and a closing point in time of a needle valve of the common rail injector.

Method for regulating a common-rail injector

A method for predefining a current through a solenoid coil of a solenoid valve, a closing point in time of the solenoid valve being detected with the aid of a sensor, a sensor value being monitored, and, when a premature closing of the solenoid valve is identified based on the monitored sensor value, the current through the solenoid coil of the solenoid valve is increased.

Method for predefining a current in a solenoid valve

A method is described for operating at least one magnetic switching element, at least one first connection of at least one sensor device being connected to at least one connection of a coil of the magnetic switching element, and the first connection or an additional connection of the sensor device being connected to a reference potential, and a measuring state being established in which at least one connection of the coil is essentially at least temporarily decoupled from the reference potential and/or from a source activating the coil, and at least one signal of at least one sensor of the sensor device being ascertained in the measuring state from at least one electrical potential at at least one connection of the coil.

Method for operating a switching element

Electromagnetic valve, particularly for controlling a fuel injector or for regulating the pressure of a high-pressure fuel accumulator, comprising a casing (), an electromagnet () formed of a yoke () and an electromagnetic coil () housed in the latter, and an armature () in one or more parts. An abutment disk () is provided between the transverse face of the armature () turned towards the yoke () and the transverse face facing the yoke (), this abutment disk () being made of a magnetized or magnetizable material, particularly of a ferromagnetic material.

Electromagnetic valve for controlling an injector or for regulating pressure of a high-pressure fuel accumulator

The invention relates to an actuator () comprising a housing (), a coil () and an armature () which interacts with a tappet () and a spring, the armature plate () thereof being arranged to lie opposite an armature counterpiece (), and said actuator () comprising at least one magnetostrictively-active component. According to the invention, an actuator () is provided with which large actuating paths can be travelled at high actuating forces. This is achieved by the actuator () additionally being designed to act as a solenoid.

Actuator

In a method for operating a magnetic switching element, at least one connection of at least one sensor device is connected to at least one connection of a coil of the magnetic switching element, and at least one measuring state is established in which the at least one connection of the coil is largely at least temporarily decoupled from a ground, a voltage source, and/or a current source activating the coil, and at least one auxiliary voltage and/or at least one auxiliary current is/are applied to the at least one connection of the coil in the measuring state, and at least one sensor signal is ascertained from at least one electrical potential, at least one potential difference, and/or at least one current flowing at the connections of the coil.

Method for operating a magnetic switching element

The invention relates to a control chamber, the pressure of which determines the strokes or positions of a nozzle needle, and which is assigned to a force or pressure sensor in order to detect the progression of the control chamber pressure. Because the control chamber pressure significantly changes during the closing of the nozzle needle, the operating phases of the injector can be exactly determined from the sensor data and supplied to an engine controller.

Fuel injector

A method for operating a fuel injection system of an internal combustion engine is described. The fuel injection system has an injector for metering fuel into a combustion chamber of the internal combustion engine. The injector has an actuator, a control valve and a nozzle needle. In the method, the actuator is supplied a voltage and/or a current during an activation period. The control valve is set into a lifting motion by the actuator. The injector is opened and closed by the nozzle needle, using the lifting motion of the control valve. A further time period is ascertained. The further time period ends at the closing time of the nozzle needle. A function is ascertained, which links the activation period to the further time period. A shortest activation period, for which the nozzle needle opens and produces an injection, is ascertained with the aid of the function. An opening delay period (d) of the nozzle needle is ascertained as a function of the shortest time period.

Method for operating a fuel injection system of an internal combustion engine

The invention relates to a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine, comprising a nozzle needle () which is able to perform stroke motions and by the stroke motion of which at least one injection opening can be exposed or closed, and further comprising a control valve () for controlling the stroke motion of the nozzle needle () in that, depending on the respective switch position of the control valve (), hydraulic pressure applied in closing direction to the nozzle needle () in a control chamber () is altered, and further comprising a sensor array () for detecting the needle closing time. According to the invention, the sensor array () is arranged in the low-pressure area of the fuel injector in a space () which is sealed with respect to the fuel-conducting area (). Sealing of the space () is effected by a membrane () made of a fuel-resistant, electrically conductive material, allowing the membrane () to also be utilized for implementing a ground connection.

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Stuttgart-Feuerbach, Germany

Marco Beier