Daimler Chrysler Ag

Dornier Gmbh

Daimler-benz Ag

Mercedes-benz Aktiengesellschaft

Degussa - Huls Ag

Dornier System Gmbh

Dornier Gmbh Lhg

Carsten Plog

Thomas Stengel

Ralf Moos

Renato Andorf

Werner Maunz

Roland Kemmler

Ralf Mueller

Aleksandar Knezevic

Martin Matt

Eberhard Holder

Thomas Birkhofer

Viktor Pfeffer

Michael-Rainer Busch

Wolfgang Schaefer

Norbert Markert

Armin Kayser

Juergen Haas

Thomas Kreuzer

Egbert Lox

Wolfgang Strehlau

Dirk Voigtlaender

Klaus Binder

Karl-Heinz Thiemann

Tillmann Braun

Ralf Müller

J&uuml;rgen Leyrer

Ralph Stetter

Dirk Voigtl&auml;nder

Hans Van Den Tillaart

Dirk Herbstritt

Winfried Degen

Holger Leye

Burkhard Kessler

Juergen Steinwandel

Armin H&uuml;rland

Willi Muller

Viktor Pfeiffer

Thomas Ried

Klaus-J&uuml;rgen Marquardt

Matthias Bohl

Willi Mueller

Guido Schaeffner

Michael Bischof

Ulrich Simon

Udo Flesch

Nikolas Fekete

Markus Amman

Melanie Schnell

Erwin Loeffler

The present invention relates to a fuel conditioning process for internal combustion engines of motor vehicles. According to the present invention, on board a motor vehicle at a temperature of from 20&#xb0; C. to 150&#xb0; C. and at atmospheric pressure, nitrous gases essentially including nitrogen monoxide, nitrogen dioxide, or dinitrogen monoxide, or gaseous mixtures thereof are passed through the liquid fuel of the motor vehicle, nitro compounds being formed in the fuel as a result of the passing through of the nitrous gases through the fuel.

Fuel conditioning process

In a device for determining an exhaust gas recirculation rate (EGR) in an internal combustion engine, wherein the device includes a sensor unit, which in a first region is exposed to an exhaust-gas atmosphere from an exhaust gas recirculation line and in a second region is exposed to an exhaust gas/fresh air atmosphere in an intake line of the internal combustion engine downstream of a location where the exhaust gas recirculation line opens into the intake line, the sensor unit disposed in the intake line is tubular with the inner side of the sensor unit being exposed to the exhaust gas atmosphere and the outer side of the sensor unit being exposed to the exhaust gas/fresh air atmosphere. The sensor unit is preferably positioned centrally within the intake line away from the wall of the intake line.

Device for determining the exhaust gas recirculation rate of an internal combustion engine

The operating temperature of a gas sensor capable of sensing a gas or a gas composition at a high temperature, for example 1000&#xb0; C. is maintained constant over the entire volume of a gas sensor layer or function layer () secured to a sensor carrier section of the gas sensor by supplying heat to the gas sensor layer () in such a way that varying heat dissipations in the sensor carrier section are compensated. For this purpose, an electrical heater for heating the gas sensor layer () has individual heater sections with different heating resistance values which depend on a spacing between any individual heater section and the tip of the sensor carrier section.

Arrangement of a heating layer for a high-temperature gas sensor

A method for determining the storage state of an ammonia-storing SCR catalyst, the change in at least one physical property of the SCR catalyst material, changing with the NH storing process, being sensed, the measurement taking place on the SCR catalyst material itself by applying a measuring pickup to the SCR catalyst or bringing it into direct contact with the latter and determining the storage state on the basis of these results. In an alternative embodiment, a material identical or similar to the SCR catalyst material with regard to its physical properties is arranged in the exhaust-gas stream in addition to the SCR catalyst material, and the change in at least one physical property of this substitute material changing with the NH storing process, is sensed, the measurement taking place on the substitute material itself by applying the substitute material to the measuring pickup or bringing it into direct contact with the latter and determining the storage state of the SCR catalyst on the basis of these results.

Method and apparatus for determining the storage state of an ammonia-storing SCR catalyst

A process for the desulfurization of an engine fuel onboard a motor vehicle includes separating sulfur-containing components of the engine fuel by selective liquid-phase adsorption on an adsorption material. The adsorption material may be an oxide of Al, Mg, Si, or Ti that is doped with Ag.

Method for desulphurizing engine fuel on board a motor vehicle

A sensor for determining the concentration of sulphur compounds in a liquid includes: a working electrode in contact with the liquid to be analyzed; a referenced electrode insulated from the liquid to be analyzed; a liquid-impermeable membrane located between the working electrode and the reference electrode and permeable to an ion that may form a chemical compound with the sulphur compounds in the liquid to be analyzed; and a reference material in contact with the reference electrode or forms the reference electrode.

Sensor for determining the concentration of sulphur compounds in a liquid

High temperature sensor

In a fuel fractionation device for separating a low-boiling fuel fraction from a liquid fuel of an internal-combustion engine, including a vessel which contains the liquid fuel, and in which a reduced pressure is generated by withdrawing the low-boiling fuel fraction in vapor form from the vessel and making it available to the internal combustion engine, the efficiency of the fractionation is improved by utilizing a carrier-gas which is introduced into the liquid fuel, and which is withdrawn from the vessel together with the fuel fraction vapor.

Fuel fractionation device

In a fuel supply system for an internal combustion engine including a fuel tank, a fuel processing apparatus to which fuel from the tank is supplied and which separates the fuel into different fractions, the fuel and the fractions are mixed in a mixing chamber according to a performance graph stored in a control unit depending on the operating state of the engine and the mixture is then supplied to the engine in a controlled manner.

Fuel supply system

In a method for identifying the state of an NOx storage catalyst which is cyclically loaded with NOx in the exhaust stream of an internal combustion engine and regenerated, two electrical defining quantities, independent of each other, of the electrically complex impedance of the NOx storage catalyst are detected, one of the two electrical quantities being a measure of the degree of loading of the NOx storage catalyst, and from the second electrical quantity the point in time being identifiable for the end of the regeneration process of the NOx storage catalyst.

Method for identifying the state of an NOx storage catalyst

In a fuel supply system for an internal combustion engine having a fuel tank for liquid fuel, a fuel pump which draws fuel from the fuel tank and pressurized the fuel to an injection pressure at which the fuel is made available to the internal combustion engine, a fuel-fractionating device which produces at least one liquid fuel fraction from the fuel, and an accumulator which receives the liquid fuel fraction from the fuel-fractionating device, stores it and makes it available to the internal combustion engine, the fuel fraction made available and the fuel made available being fed to the internal combustion engine by the fuel supply system as a function of demand, the accumulator is a pressure accumulator and includes pressure-generating means for pressurizing fuel fraction in the pressure accumulator to the injection pressure.

An apparatus for reducing the emission of vaporized hydrocarbons in a fuel supply system. The apparatus comprises a filter for binding the hydrocarbons. A catalyst for oxidation of the hydrocarbons to carbon dioxide and water is provided downstream of the filter.

Apparatus for reducing the emission of vaporized hydrocarbons in a fuel supply system

A catalyst for reducing nitrogen oxides in oxidizing and reducing atmospheres which contains iridium on a support material. Silicon dioxide or a dealuminized zeolite in the acid H form with a modulus of more than 20, preferably more than 100, or mixtures thereof are used as support materials. Iridium is deposited on the external surfaces of these support materials with average particle sizes between 10 and 30 nm. The catalyst is particularly suitable for treating exhaust gases from lean-burn gasoline engines or from diesel engines.

Catalyst for reducing nitrogen oxides in oxidizing and reducing atmospheres

A gas sensor, comprises a substrate, a sensor unit including a functional layer and an electrode structure, and an electric heating and/or temperature measuring arrangement. An electrically conductive shielding structure is provided between the sensor unit and the electric heating arrangement in order to shield the measurement process at the sensor unit from interferences owing to the heating process, thereby reducing or preventing the effects of electrical fields caused by voltages applied to the heating arrangement from altering or disrupting the measurement process.

Gas sensor

An Ag-containing solid, such as Ag,O, Ag,CO,, and AgOH, is used for storing/releasing nitrogen oxides in an exhaust gas from an engine during controlled cycling of the &lgr;-value of the exhaust gas. The nitrogen oxides are stored at &lgr;-values of the gas greater than 1 in the Ag-containing solid and the nitrogen oxides are released at &lgr;-values of the gas less than or equal to 1 from the Ag-containing solid. The Ag-containing solid may include a precious metal or a microporous carrier, for example, ZrO,, SiO,, TiO,, Si&mdash;Al mixed oxide, and zeolites.

Solid for storing/releasing nitrogen oxides as well as nitrogen oxide storage catalyst

Growing community of inventors

Markdorf, Germany

Carsten Plog