Robert Boschgmbh

Stefan Stein

Volker Reusing

Marco Beier

Fabian Fischer

Holger Rapp

Nestor Rodriguez-Amaya

Wolfgang Stoecklein

Rainer Haeberer

Bernd Berghaenel

Helmut Clauss

Guenter Keusen

Ralph Kober

Joerg Lange

Michael Jupe

Damian Dyrbusch

Tobias Reiser

Oezguer Tuerker

Reinhold Melcher

Siegbert Griesinger

Lars Olems

Andreas Gaudl

Torsten Burock

Changyi Wang

Martin Johannaber

Chris Weirauch

Arnad Beganovic

Ralf Gragen

Heike Lang

Jens Benitsch

Frank Schmitt

Volker Kroeber

Ralf Scholl

Carsten Bork

Axel Schnaufer

Mario Herrera

Karl Stichleutner

Holger Stephan

Kristin Schoenau

Volker Ruesing

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 procedure for a switching pressure calculation at a metering valve of a fuel metering device for metering fuel into an exhaust gas system of a combustion engine with a component that is assigned to the exhaust gas system of the combustion engine for a regeneration, for a temperature impinge and/or for a thermo management, whereby the fuel is injected before this component in streaming direction of the exhaust gas. The invention concerns furthermore a corresponding device for implementing the procedure.

Procedure and device for a switching pressure calculation at a metering valve

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

The invention relates to an injection system for injecting a fluid into a filter provided in an exhaust system, comprising at least two modules and at least one pressure compensation volume (), which is designed for feeding fluid to at least one of the modules and hydraulically connects at least two of the modules. Each module comprises at least one injection unit () designed for injecting fluid into the exhaust system.

Injection system for injecting fluid into an exhaust tract

A mounting unit () for fastening an injection member to an exhaust gas tract has a retaining region () for receiving the injection member, and an edge region (). At least one opening () for receiving a fastening element is provided in the edge region (). The mounting unit () is designed in such a manner that there is an air gap () between the fastening element and the retaining region () when the mounting unit () is fastened to the exhaust gas tract by the fastening element.

Mounting unit for fastening an injection member to an exhaust gas tract

The invention relates to a metering device for fuel upstream of an oxidation catalytic converter in the exhaust gas system of an internal combustion engine. A closing valve and/or a metering valve and an injection valve are integrated downstream of a supply device for fuel into a line leading to a metering unit. A return having a first overflow valve branches off upstream of the metering unit. A further return having a second overflow valve influencing a mean pressure level of the metering unit is disposed between the closing valve and the metering valve.

Device for metering fuel

The invention relates to a device for the regeneration, temperature loading and/or thermal management of a component, assigned to an exhaust system, of an internal combustion engine. The device includes at least one injection valve which injects a fluid, in particular fuel, into the exhaust system, preferably in chatter mode, for example as a function of the pressure of the supplied fluid. The injection valve has a valve head and a valve seat which have geometries designed in such a way that a fluidic force of the supplied fluid acting on the injection valve drops continuously over a stroke of the valve head. The invention also relates to an injection valve having such valve-head and valve-seat geometries and to a corresponding method for the regeneration, temperature loading and/or thermal management of a component, assigned to an exhaust system, of an internal combustion engine.

Device for regeneration, temperature loading, and/or thermal management, associated injection valve, and method

The invention relates to a device for the regeneration, temperature loading and/or thermal management of a component, which is assigned to an exhaust gas system, of an internal combustion engine preferably of a vehicle, having at least one injection valve, which operates preferably in a chatter mode as a function of the pressure of supplied fuel, for injecting fuel for the purpose of regeneration, temperature loading and/or thermal management into the exhaust system of the internal combustion engine. The invention is distinguished by at least one pressure control valve which is arranged upstream of the injection valve and dampens or eliminates pressure fluctuations. The invention also relates to a corresponding method.

Device and method for regenerating a particulate filter

A procedure specifically for the execution of a diagnosis of an emission treatment system is being introduced. The pressure of the reagent between the first and second valve and/or between the second valve and the injector valve is measured and the pressure measuring signal are the basis of the diagnosis. The first and second valve, are opened in an alternating cycle, where the opening time, and/or the period duration of the first and second valves are set in such a way that the emerging diagnostic flow volume is smaller than the measuring flow volume. The procedures pursuant to the invention thereby reduce the influence of dynamic precursors of the reagent flow in the reagent line and enables, aside from an increase in reliability of the diagnosis results, a diagnosis possibility of small leakages.

Procedure for diagnosis of an emission treatment method and procedures to carry out same said method

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Stuttgart, Germany

Stefan Stein