Robert Boschgmbh

Robert Bosh Gmbh

Wolfgang Ripper

Wolf Wessel

Bernd Mahr

Johannes Schaller

Stefan Wickert

Thorsten Mayer

Dirk Heilig

Ulrich Meingast

Gerhard Stumpp

Max Straubel

Konrad Eckert

Wilhelm Polach

Klaus Mueller

Klaus Marx

Markus Buerglin

Michael Offenhuber

Dirk Samuelsen

Torsten Handler

Hanspeter Mayer

Manfred Mack

Godehard Nentwig

Rainer Strohmaier

Bernhard Kamp

Juergen Hanneke

Christian Walz

Volkhard Stein

Michael Gerlach

Sven Huber

Matthias Loehr

Stefan Fischer

Jochen Doehring

Bernd Dittus

Ralf Schernewski

Hartmut Lueders

Werner Wagner

Dirk Von Meduna

Guenter Driedger

Cord Scharsack

Markus Foetschl

Ulf-Peter Schmeling

Achim Oberascher

Siegfried Zerbin

Gerald Hoepflinger

Walter Frisch

Thomas Prasser

Goetz Flender

Cornelia Goldmann

Hans-Harald Stoehr

Michael Reichelt

Johannes Dehn

Matthias Pfaff-Rollwagen

The invention relates to an injection device (), designed in particular for injecting fluid into an exhaust tract of an internal combustion engine, having a valve needle (), an injection chamber () having at least one injection opening (), and a control chamber (). The injection device () is designed such that a pressure differential between the injection chamber () and the control chamber () brings about a displacement of the valve needle () between an open position in which a fluid flow through the injection opening () from the injection chamber () is released, and a closed position, in which the injection opening () is closed off. The injection chamber () and the control chamber () are hydraulically connected to an inlet (), such that a pressure rise in the inlet () results in a pressure rise in the injection chamber (), and a pressure rise in the control chamber () delayed in time relative to the pressure rise in the injection chamber (), and said pressure differential brings about a displacement of the valve needle () from the closed position into an open position.

Injection device for introducing a urea solution into the exhaust tract of an internal combustion engine

A medium supply system of an exhaust gas cleaning device for treating the exhaust gas of an internal combustion engine comprising a storage tank and a supply line which is connected to the storage tank for supplying the medium to a dosing unit connected to an exhaust pipe and to a recycling line for recycling the medium to the storage tank. The supply line and/or the recycling line are provided with at least one conduit area comprising at least one first and second parallel partial channels for the medium circulation, wherein said partial channels exhibit different insulation properties. An exhaust gas cleaning device comprising the inventive supply system and a method for the operation thereof are also disclosed.

Supply system for a medium for treating exhaust gases of an internal combustion engine; exhaust gas cleaning device; and a method for operating a supply system

The invention relates to a dosing system comprising a dosing means for metering a liquid, especially an aqueous urea solution used for the after treatment of exhaust gases generated by combustion engines. The liquid can be conveyed from a reservoir into an exhaust manifold through the dosing means in a normally operating conveying device. According to the invention, at least one area that is located between a dosing point and the reservoir and is impinged upon by the liquid can be emptied counter to a normal transport direction of the liquid.

Metering system and method for operating a metering system

The invention relates to a metering system for injecting pollutant reducing medium into an exhaust system includes a metering pump, and at least one self-opening nozzle for injecting fluidic media into the exhaust gas system. The nozzle is self-opening with a needle chamber, a nozzle needle and a spring chamber with a spring element. The needle chamber and spring chamber are separated by a flexible membrane which prevents fluidic media from escaping from the needle chamber into the spring chamber, and also permits an excess pressure to prevail in the needle chamber in relation to the spring chamber, causing the nozzle needle to be displaced in opposition to a spring force, thus releasing a nozzle opening. The inventive metering system is cost-effective, robust and can also be used at low operating temperatures.

Metering system for reducing pollutants in motor vehicle exhaust gases

A method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine, and a device for implementing the method, which provide for an open-loop or closed-loop control of the reagent fill level in the catalytic converter to a predefined storage setpoint value. The targeted stipulation of the storage setpoint value ensures, on one hand, that in non-stationary states of the internal combustion engine, there is a sufficient quantity of reagent available for the completest possible removal of at least one unwanted exhaust-gas component, and on the other hand, a reagent slip is avoided.

Method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine and a device for implementing the method

Apparatus for storing and metering of reducing agents that may be used within the framework of a catalytic exhaust gas aftertreatment, having a device for storing the reducing agent to be metered and a metering device for applying the reducing agent to the exhaust gas to be treated, the device for storing the reducing agent having an outer container and a cartridge, containing the reducing agent, that is able to be exchangeably positioned in it.

Method and device for storing and dosing a reducing agent

A method for monitoring a component situated in an exhaust gas region of an internal combustion engine in which the low pass behavior, which is determined by the heat capacity of the component, is monitored by a valuation of a measure of a first exhaust gas temperature, which appears upstream of the component that is to be monitored, and of a second exhaust gas temperature, which is recorded by a second temperature sensor downstream from the component to be monitored.

Method for monitoring a component situated in an exhaust gas region of an internal combustion engine

A device and a method for controlling an exhaust-gas aftertreatment system, for example, for an internal combustion engine, are provided. The exhaust-gas aftertreatment system includes at least one catalytic converter. A reducing agent is supplied to the exhaust-gas aftertreatment system. An exhaust gas mass flow is preselectable on the basis of the power consumption by a sensor and/or on the basis of a pressure variable.

Method and device for controlling an exhaust treatment system

A mixing device for mixing the exhaust gas of an internal combustion engine flowing in an exhaust pipe with a reducing agent as well as an exhaust gas purification system having such a mixing device, in which a mixing body is positionable in the exhaust pipe and which includes a gas impact surface and a spray impact surface so that exhaust gas flowing from the internal combustion engine is able to strike the gas impact surface and reducing agent, which is suppliable transversely to the exhaust gas flow, is able to strike the spray impact surface, the spray impact surface and the gas impact surface forming disjointed sub-areas of the surface of the mixing body. The mixing device distributes the reducing agent uniformly over the cross section of the exhaust pipe and mixes it uniformly with the exhaust gas.

Mixing device for an exhaust gas purification system

A device and a method for controlling an exhaust-gas aftertreatment system, e.g., for an internal combustion engine, are described. The exhaust-gas aftertreatment system includes at least one catalytic converter. A preselectable quantity of reducing agent is supplied to the exhaust-gas aftertreatment system as a function of the state of the internal combustion engine and/or the exhaust-gas aftertreatment system. The quantity of reducing agent supplied is adjusted.

A device for generating a mixture of reducing agent and air, having a mixing space into which reducing agent via a reducing agent delivery conduit and air via an air delivery conduit can be introduced into the mixing space, having means for pressurizing the air, in such a way that the air flows essentially at the speed of sound through the air delivery conduit.

Device and method for producing a reducing agent air-mixture

A fuel injection valve for internal combustion engines, having a valve member that is axially displaceable in a valve body and that with a sealing face cooperates, to control an injection opening, with a valve seat face on the valve body. An end of the valve member remote from the combustion chamber is urged in the closing direction by a valve spring disposed in a spring chamber. The valve member has a pressure shoulder acting in the opening direction, which protrudes into a pressure chamber that is filled with high fuel pressure. Via a throttle gap, the spring chamber communicates with the pressure chamber and is sealed off from a fuel return system, so that during the opening stroke motion of the valve member the spring chamber acts as a hydraulic damper.

Fuel injection valve for internal combustion engines

A control device is proposed for regulating the exhaust gas recycling rate in an internal combustion engine with self-ignition in which combustion pressure signals are adjusted directly or indirectly to nominal values dependent on operating characteristics of the engine. In one particular embodiment the combustion pressure signal is differentiated and the frequency of certain occurring amplitude values is adjusted to a nominal value. Owing to the integration of specific combustion processes into the regulation, the device is capable of operating with relatively high precision. It is particularly well suited to compensate for drift phenomena.

Control device for regulating the exhaust gas recycling rate in an

A method and an apparatus are proposed for determining and controlling an exhaust gas recirculation rate in internal combustion engines (Diesel engines), wherein an adjusting member in the exhaust gas recirculation line is adjusted by a regulator in order to attain precise regulation of the exhaust gas quantity recirculated to the aspirated air zone. The regulator is supplied with the exhaust gas temperature (T4) measured at a given time as the load signal for the engine. The comparison value of the regulator is then either an actual value of the exhaust gas recirculation rate, ascertained by means of effective temperature measurements in the intake zone of the engine, or a set-point differential temperature which is produced by means of measuring the aspirated air quantity at a given time and the rpm.

Method and apparatus for determining and controlling the exhaust gas

An apparatus for regulating the exhaust gas recycling rate in an internal combustion engine having self-ignition is proposed, in which a set-point or nominal ignition delay value is ascertained, and the actual ignition delay value is regulated to this nominal value. The nominal ignition delay value is efficaciously derived from a multi-dimensional memory, the coordinate values of which are dependent on at least load and rpm. The ignition delay time is ascertained from a comparison of the signal for the injection onset of an injection nozzle, for instance, and the signal of a pressure sensor communicating with the combustion chamber.

Apparatus for regulating the exhaust gas recirculation rate in internal

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Stuttgart, Germany

Wolfgang Ripper