Robert Boschgmbh

Daimler Ag

Marc Chaineux

Rainer Haeberer

Jens Reinhold

Berthold Keppeler

Markus Paule

Christian Walz

Horst Kleinknecht

Bernd Christner

Buelent Barcin

Nicholas Fekete

Andreas Wagner

Andreas Feldges

Tobias Hoeffken

Wilhelm Dueck

Bernhard Kurrle

Petr Zeman

Thilo Regitz

Florian Moldenhauer

Mathias Schwarz

Till Broestl

Edna Boos

Stefan Geise

The invention relates to a connecting piece () for fluid lines of an exhaust gas aftertreatment system (), comprising a hollow body () having at least three fluid connection points (), which are fluidically connected to each other in the hollow body (), at least two of the fluid connection points () being separated from a third fluid connection point () by means of respective membranes (), each membrane () being permeable to a liquid and, when wetted by the liquid, being impermeable to a gas.

Connecting piece for fluid lines of an exhaust-gas aftertreatment system

A method is disclosed for determining a current temperature of a heating element with a PTC thermistor property (PTC) with which a urea-water solution for cleaning the exhaust gas in an internal combustion engine of nitrogen oxides can be heated. According to the invention there is provision that a correction factor is formed from the quotient of a minimum resistance of the heating element and of a minimum resistance of a reference heating element, in that a resistance which is determined at a current temperature of the heating element is multiplied by the correction factor, and in that the current temperature of the heating element is determined from the corrected resistance value and a temperature dependence of the resistance of the reference heating element. The method according to the invention permits more precise determination and regulation of the temperature of the heating element.

Device and method for operating a heater for an exhaust gas purification system

A method for operating an electromagnetically actuated metering valve, which is loaded with a pulse-width modulated metering signal, which stipulates the dosage of a reagent or a precursor of the reagent introduced into the exhaust gas region of an internal combustion engine and an apparatus for implementing the method are proposed. A clock signal is provided, whose cycle duration is smaller than the cycle duration of the pulse-width modulated metering signal. The cycle duration of the pulse-width modulated metering signal is set as a function of a metering request signal to multiples of the cycle durations of the clock signal. The procedural approach according to the invention allows for a rapid adaptation of the dosage to the metering demands.

Method for operating a metering valve and apparatus for implementing the method

A method for checking the plausibility of the signals of a tank filling level sensor of a motor vehicle () is characterized in that the roadway inclination of the roadway () which is traveled on by the motor vehicle () is determined, and definitive information about the possibility of using the signals of the tank filling level sensor is obtained as a function of the roadway inclination (N).

Method for checking the plausibility of the signals of a tank filling level sensor

Procedure for operating an electromagnetically operated metering valve, which is impinged with a metering signal, which determines the metering of a reagent or a precursor of a reagent that has to be injected into the exhaust gas area of a combustion engine, is thereby characterized, in that the reagent pressure is detected at an opened metering valve in a default cycle, which indicates the reagent flow and in that the reagent flow is added over the opening time of the valve for determining the actual metering amount.

Procedure for operating a metering valve and device for implementing the procedure

The invention relates to a method for detecting an error in a component assembly of a motor vehicle, the component assembly having a functional control unit and at least one function module to be controlled by the functional control unit as components. According to the method, a check is made by the functional control unit to determine whether a combination of individual errors is present for at least one component of the component assembly. When the combination of individual errors is thereby present, an occurrence of the error is verified by the functional control unit and a signal for implementing an emergency functional strategy is transmitted by said control unit to an engine control unit.

Method for detecting an error in a component assembly

A procedure for a reasonability check of the signal of a temperature sensor that is arranged in a reducing tank, in particular a HWL-tank, is thereby characterized, in that the tank level is detected by a tank level sensor that is arranged almost at the same filling level position as the temperature sensor, in that the tank level sensor signal is compared to the temperature sensor signal and then, if default tank level sensor signals correlate within default limits with default temperature sensor signal values, a functioning temperature sensor and/or a functioning tank level sensor are indicated.

Procedure for a reasonability check of a temperature sensor

In a device and a method for removing nitrogen oxides from the exhaust of an internal combustion engine which is operated predominantly with an excess of air, the internal combustion engine is assigned an exhaust system having a nitrogen oxide reduction catalytic converter which comprises two catalytic converter parts, whose reducing agent filling levels can be determined. Metering of a reducing-agent-containing additive into the exhaust gas of the internal combustion engine takes place as a function of the reducing agent filling level of the first catalytic converter part and/or of the second catalytic converter part.

Device for removing nitrogen oxides from internal combustion engine waste gas and method for dosing an aggregate of internal combustion engine waste gas

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Stuttgart, Germany

Marc Chaineux