Patent application number | Description | Published |
20110100062 | REFRACTION-SENSITIVE OPTICAL FIBER, QUARTZ GLASS TUBE AS A SEMI-FINISHED PRODUCT FOR THE MANUFACTURE-THEREOF AND METHOD FOR THE MANUFACTURE OF THE FIBER - A known refraction-sensitive optical fiber comprises a core zone with an index of refraction n | 05-05-2011 |
20110274129 | METHOD FOR PRODUCING A CYLINDRICAL OPTICAL COMPONENT OF QUARTZ GLASS AND OPTICALLY ACTIVE COMPONENT OBTAINED BY SAID METHOD - Cylindrical optical components of quartz glass are known, which have an inner zone made of an inner zone glass, which extends in the direction of the longitudinal axis and is surrounded by a jacket zone made of a jacket zone glass, the average pt wall thickness thereof varying at least over a part of its length in the direction of the longitudinal axis of the component. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass. A method is proposed according to the invention, comprising the following method steps: (a) providing a first parison made of an inner zone glass, which has a first contact surface on the end face, said contact surface having a conical external contour; (b) providing a second parison from the jacket zone glass; (c) embedding the contact surface with a conical external contour into the jacket zone glass and welding the contact surface to the jacket zone glass, thereby forming a composite parison which has a cone-shaped inner zone area of inner zone glass in a contact area, said inner zone area being surrounded by a jacket zone having the shape of an inner cone; and (d) elongation of the composite parison to form the optical component or a preproduct of the component. | 11-10-2011 |
20150017440 | QUARTZ GLASS TUBE AS A SEMI-FINISHED PRODUCT FOR AN OPTICAL COMPONENT AND METHOD FOR PRODUCING SAID QUARTZ GLASS TUBE - A quartz glass tube as a semi-finished product for an optical component that has an inner bore extending along a tube centre axis for the acceptance of a core rod and a tube wall limited by an inner casing surface and an outer casing surface is already known; within said tube wall an inner region made of a first quartz glass and an outer region made of a second quartz glass with a different index of refraction surrounding the inner region contact one another at a contact surface which runs around the centre axis. In order to provide a quartz glass on this basis that facilitates the production of optical components for special applications such as laser-activated optical components in wand or fibre form, the invention states that the contact surface has a non-round course in the radial cross-section and the inner casing surface has a circular course. | 01-15-2015 |
20150218036 | METHOD FOR PRODUCING AN OPTICAL PREFORM WITH A POD CLADDING GLASS LAYER - The invention relates to a plasma deposition process for producing an optical preform, which is characterized by a cladding glass layer having a non-round internal cross-section together with high fluorine doping and axially and radially specified dopant distribution, which in the simplest case is as uniform as possible. For this purpose, a two-stage method is proposed, wherein a substrate body having a non-round cross-section is first reshaped into a coated substrate body having a circular cross-section in that a POD filling layer made of quartz glass having the nominal fluorine concentration is deposited onto a present filling surface and rounded by grinding, and then in the second stage of the method a POD sheathing glass layer made of fluorine-doped quartz glass and having a circular-ring-shaped cross-section is deposited. | 08-06-2015 |
Patent application number | Description | Published |
20100205948 | DEVICE FOR INTRODUCING A LIQUID REDUCING AGENT INTO AN EXHAUST GAS OF A COMBUSTION SYSTEM | 08-19-2010 |
20100218484 | METHOD AND DEVICE FOR CONTROLLING AN SCR-EXHAUST GAS AFTER-TREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for controlling an SCR-exhaust gas after-treatment system ( | 09-02-2010 |
20100257842 | METHOD FOR DETECTING THE MINIMUM OPENING TIME OF A REDUCING AGENT FEED DEVICE IN AN EXHAUST GAS AFTERTREATMENT SYSTEM COMPRISING AN SCR CATALYST - In a method for adapting the reducing agent feed in an exhaust gas aftertreatment system having an SCR catalyst for removing nitrogen oxides from the exhaust gas of an internal combustion engine and at least one reducing agent feed device, the minimum opening time of the reducing agent feed device is determined during operation and while suspending nitrogen emission, carrying out the following steps: a) the opening time of the reducing agent feed device is gradually prolonged until b) a reducing agent-sensitive sensor in the exhaust gas aftertreatment system detects a reducing agent signal. An exhaust gas aftertreatment system is designed accordingly for carrying out the method and a device is designed for controlling an exhaust gas aftertreatment system. | 10-14-2010 |
20110047972 | DEVICE AND METHOD FOR METERING A REDUCING AGENT INTO AN EXHAUST GAS SYSTEM OF A MOTOR VEHICLE - In an internal-combustion engine exhaust gas system, a storage tank stores the reducing agent, a supply pipe connects the storage tank to a metering unit which introduces the reducing agent into the exhaust gas system. A pump mechanism within the supply pipe conveys the reducing agent. A pressure sensor detects the pressure in the supply pipe downstream of the pump, and a pressure-releasing device has a return pipe connected to the storage tank and comes off the supply pipe. A first valve system is arranged in the supply pipe. A section of the return pipe is located at a higher level than the return pipe to form a storage volume for air present in the supply pipe. A second valve system is arranged in the supply pipe to create, when the second valve system is closed, a storage volume for pressurized reducing agent by way of this pipe branch. | 03-03-2011 |
20110094208 | METHOD AND DEVICE FOR CONTROLLING AN EXHAUST GAS POST-TREATMENT - In a method and device for controlling an exhaust gas post-treatment for an internal combustion engine with at least one cylinder (Z | 04-28-2011 |
20110264352 | METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE - To operate an internal combustion engine of a motor vehicle, during a plurality of driving cycles of the motor vehicle at least one operating variable is recorded during each run which is representative of a harmful substance content of an exhaust gas of the internal combustion engine. The recorded runs are analyzed with respect to recurring run patterns. In a current driving cycle of the motor vehicle, a target value of an ammonia charge level of an exhaust gas catalyst of the internal combustion engine is determined using the recurring run pattern, depending on which, at least one actuating signal for an actuator is determined, the position of which affects an actual ammonia charge level of the exhaust gas catalyst. In order to convert the determined target value of the ammonia charge level of the exhaust gas catalyst, the actuator is controlled as a function of the actuating signal. | 10-27-2011 |
20120324866 | METHOD FOR OPERATING A DELIVERY DEVICE FOR A REDUCING AGENT AND DELIVERY DEVICE FOR A REDUCING AGENT - A method for operating a delivery device for delivering a reducing agent from a reducing agent tank into an exhaust treatment device of an internal combustion engine of a motor vehicle, includes at least intermittently carrying out a ventilation process of the delivery device during operation of the internal combustion engine. A registration of a ventilation process first occurs. A timing unit having a preset time interval and/or a mass-flow summing unit having a preset total mass flow is then actuated. When the preset time interval and/or the preset total mass flow is reached, the ventilation process is then carried out. In particular, monitoring the delivery device by a pressure sensor can thus be omitted. A delivery device for delivering a reducing agent is also provided. | 12-27-2012 |
20130025268 | METHOD FOR OPERATING A DELIVERY UNIT FOR A REDUCING AGENT AND MOTOR VEHICLE HAVING A DELIVERY UNIT - A method for operating a reducing agent delivery unit having a tank, a feed line running from the tank to an addition point, a return line branching off from the feed line and a valve to be activated with an electrical current for closing off the return line, includes initially applying an activation current to the valve for a first time interval. Subsequently, a holding current is applied to the valve when the first time interval has elapsed. Then, an operating variable of the delivery unit is determined and at least the activation current, the holding current and/or the first time interval are adapted as a function of the determined operating variable. A motor vehicle having a delivery unit is also provided. | 01-31-2013 |
Patent application number | Description | Published |
20110037030 | NANOPARTICULATE COMPOSITION AND METHOD FOR ITS PRODUCTION - The present invention relates to a nanoparticulate composition comprising nanoparticles with a particle-size distribution of d | 02-17-2011 |
20120129052 | COMPOSITE MATERIAL CONTAINING A MIXED LITHIUM-METAL OXIDE - A composite material containing particles, in part provided with a pyrocarbon coating, of a mixed lithium metal oxide, as well as particles, in part provided with a pyrocarbon layer, of elementary carbon. Also, a process for producing such a composite material as well as an electrode containing the composite material and a secondary lithium-ion battery containing an electrode comprising the composite material. | 05-24-2012 |
20130001335 | METHOD FOR REMOVING A PARTICULATE CONTAMINANT MATERIAL FROM A PARTICULATE MIXED LITHIUM METAL PHOSPHATE MATERIAL - The present invention relates to a method for removing a particulate contaminant material from a particulate mixed lithium metal phosphate material, comprising the steps of providing a particulate mixed lithium metal phosphate material, including a particulate contaminant material and a fine particulate mixed lithium metal phosphate, having the mass x*m, feeding the particulate mixed lithium metal phosphate material into a fluidizing stage containing particulate mixed lithium metal phosphate material of mass m, and fluidizing it in the fluidizing stage, feeding the fluidized particulate mixed lithium metal phosphate material to a sifting stage and passing it through the sifting stage, discontinuing the feed of the particulate mixed lithium metal phosphate material into the fluidizing stage after 10 to 100 times of the mass m have been fed into the fluidizing stage, fluidizing and sifting the material present in the fluidizing stage after discontinuing the feed, until the mass of the material present in the fluidizing stage becomes 10% to 100% of the mass m, and removing the remaining material from the fluidizing stage, wherein the sequence of steps b) to f) is repeated until the total mass x*m has been processed. | 01-03-2013 |
20130095385 | CARBON-CONTAINING COMPOSITE MATERIAL CONTAINING AN OXYGEN-CONTAINING LITHIUM TRANSITION METAL COMPOUND - The present invention relates to a carbon-containing composite material of particles of an oxygen-containing lithium transition metal compound which are coated with essentially two carbon-containing layers, a method for its production as well as an electrode containing the composite material. | 04-18-2013 |
20140113806 | BASIC CATALYST SUPPORT BODY HAVING A LOW SURFACE AREA - A catalyst support body containing an SiO | 04-24-2014 |
Patent application number | Description | Published |
20120260632 | METHOD FOR OPERATING A DELIVERY DEVICE FOR A REDUCING AGENT AND MOTOR VEHICLE HAVING A DELIVERY DEVICE - A method for operating a reducing agent delivery device having a liquid reducing agent tank, an injector dispensing reducing agent into an exhaust treatment device, an internal combustion engine and a reducing agent line from tank to injector, includes conveying the reducing agent from tank to injector with a pump and providing a pressure sensor in the line. The method includes, repeatedly: determining and providing supply pressure for the injector in the delivery device with the pump, calculating an injector opening time from a determined injection volume and supply pressure and opening the injector at the calculated injector opening time. A venting procedure at a point in time includes: determining an increase of a pressure conveying volume characteristic in the delivery device, calculating an air bubble volume by comparing the increase to a target increase, and conveying a conveying volume through the injector. A motor vehicle is also provided. | 10-18-2012 |
20130036724 | METHOD FOR METERING A REDUCING AGENT, METHOD FOR SETTING UP A CONTROL UNIT FOR A METERING DEVICE AND MOTOR VEHICLE HAVING A METERING DEVICE - A method for metering a reducing agent from a metering device to an exhaust gas treatment device includes initially determining at least one operating parameter of the metering device. An injector pressure at an injector for feeding the reducing agent into the exhaust gas treatment device is then calculated from the at least one operating parameter. Then, an opening time for the injector is calculated, in which at least the injector pressure determined in step b) is used. The injector is then opened for the opening time calculated in step c). A method for setting up or configuring a control unit for a metering device and a motor vehicle having a metering device are also provided. | 02-14-2013 |
20130152554 | METERING UNIT FOR A REDUCING AGENT, METHOD FOR METERING REDUCING AGENT AND MOTOR VEHICLE HAVING A METERING UNIT - A metering unit for a reducing agent includes an injector for supplying the reducing agent to an exhaust gas treatment device. A temperature sensor is disposed at the injector. A method for metering reducing agent and a motor vehicle having a metering unit are also provided. | 06-20-2013 |
20130167512 | METHOD FOR OPERATING AN EXHAUST GAS TREATMENT DEVICE AND MOTOR VEHICLE HAVING THE DEVICE - A method for operating an exhaust gas treatment device having at least one reservoir for a reducing agent and at least one delivery device for a reducing agent, includes at least checking a filling level of the at least one reservoir, checking a current exhaust gas mass flow, and delivering reducing agent if the filling level of the at least one reservoir is below a minimum filling level and the exhaust gas mass flow is in a low-load range. A motor vehicle having the exhaust gas treatment device is also provided. | 07-04-2013 |
20130228231 | MOUNTING FOR AN INJECTOR AND INJECTOR DEVICE HAVING AN INJECTOR INTEGRATED IN THE MOUNTING - A mounting for an injector includes at least one main body and a cap jointly or commonly forming a receptacle for the injector. The main body is formed of metal sheets which are connected to each other and together form at least one annular chamber which extends around the receptacle. In particular, a mounting for an injector is provided, which has a simple technical construction and can be cooled (optionally in a controlled manner). Moreover, the mounting has a particularly lightweight construction and is adapted to operation with considerable temperature differences. An injection device integrated in a mounting is also provided. | 09-05-2013 |
20130232954 | METHOD FOR OPERATING A METERING APPARATUS, METERING APPARATUS AND MOTOR VEHICLE HAVING A METERING APPARATUS - A method for operating a metering apparatus for reducing agent includes providing the metering apparatus with at least one movable pump element movable between upper and lower reversal points to convey reducing agent into an exhaust-gas treatment component, and at least one position transmitter for determining a pass of the movable pump element. In the method, a first detection of a position of the movable pump element is provided by the position encoder. Subsequently, the movable pump element is moved and reducing agent is metered into the exhaust-gas treatment component. Thereupon, a second detection of a position of the movable pump element is provided by the position encoder, and subsequently a first quantity of reducing agent which is metered between the first and second detections is determined. A metering apparatus and a motor vehicle having a metering apparatus are also provided. | 09-12-2013 |
20130255234 | METHOD FOR OPERATING A REDUCING AGENT TANK AND MOTOR VEHICLE IN WHICH THE METHOD IS CARRIED OUT - A method for operating a tank for reducing agent, in particular aqueous urea solution, having a sensor with a first electrical contact and a second electrical contact, includes initially determining a conductance value for liquid reducing agent, a conductance value for frozen reducing agent and a conductance value for air in steps a. | 10-03-2013 |
20130327026 | DEVICE FOR PROVIDING A LIQUID REDUCING AGENT HAVING A TANK WITH A TEMPERATURE SENSOR AND MOTOR VEHICLE HAVING THE DEVICE - A device for providing liquid reducing agent includes a reducing-agent tank with a tank wall which delimits a tank interior. The tank wall has a metallic wall section and the device has a temperature sensor which is disposed outside the reducing-agent tank. The temperature sensor is configured to determine a temperature of the reducing agent in the reducing-agent tank through the metallic wall section. A motor vehicle having the device is also provided. | 12-12-2013 |
20140096512 | REDUCING AGENT TANK HAVING A SENSOR FOR DETERMINING A FILL LEVEL AND MOTOR VEHICLE HAVING THE TANK - A tank for a reducing agent includes a tank wall having an outer side and an interior at least partially delimited by the tank wall. A sensor is disposed at the tank wall and has a first electrical contact and a second electrical contact. The first electrical contact and the second electrical contact communicate in an electrically conductive manner with the interior, extend through the tank wall from the interior to the outer side of the tank wall and are disposed at a first spacing of less than 5 cm from one another. A motor vehicle having the tank is also provided. | 04-10-2014 |
20140241951 | EXHAUST-GAS TREATMENT DEVICE - An exhaust-gas treatment device includes a honeycomb body wound and/or stacked with at least partially structured sheet-metal layers forming channels through which an exhaust gas can flow in axial direction from an inlet side to an outlet side. A first section of the sheet-metal layers ends flush at a first end surface associated with at least one of the sides and a second section of the sheet-metal layers ends at a second end surface associated with at least one of the sides. A spacing is provided between the first and second end surfaces because a first axial length of the first section is greater than a second axial length of the second section. The spacing forms a receptacle receiving a heating body, producing a simple electrically heatable exhaust-gas treatment device into which a heating body can be integrated during or after production of the honeycomb body. | 08-28-2014 |
20140245720 | METHOD FOR OPERATING A DOSING DEVICE AND MOTOR VEHICLE HAVING A DOSING DEVICE - A method for operating a dosing device for metering an additive to an exhaust-gas treatment device includes determining a dosing amount of additive required by the exhaust-gas treatment device in step a). Subsequently, in step b), an operating mode for the dosing device is determined by carrying out at least steps b.1) and b.2). In step b.1), at least one characteristic operating value of at least one component of the dosing device is provided being definitive of a degree of aging of the dosing device. In step b.2), an operating mode for the dosing device is set in dependence on the characteristic operating value from step b.1). In step c), the dosing device is operated with the set operating mode so that the dosing amount required in step a) is supplied to the exhaust-gas treatment device. A motor vehicle having a dosing device is also provided. | 09-04-2014 |
20140290229 | SUPPORTING PIN FOR AN ELECTRICALLY HEATABLE HONEYCOMB BODY - A supporting pin for supporting an electrically heatable honeycomb body on a first honeycomb body includes a first end region, a second end region, an intermediate region, a core made of electrically non-conductive ceramic material and a metalized surface on at least one end region. The intermediate region is electrically non-conductive and has a length of at least 3 mm, preferably 5 to 15 mm. The supporting pin is particularly suitable for stabilizing electrically heatable honeycomb bodies in exhaust gas treatment systems for internal combustion engines, particularly for motor vehicles. When higher electrical voltages, such as 48 V, are used for electrically heatable honeycomb bodies, good electrical isolation is also assured in exhaust gas systems carrying soot particles with simultaneous safe support and suppression of vibrations. | 10-02-2014 |
20140366509 | METHOD FOR OPERATING AN EXHAUST-GAS TREATMENT DEVICE HAVING A HEATER AND MOTOR VEHICLE HAVING THE DEVICE - A method for operating an exhaust gas treatment device including an electric heater for heating an exhaust gas flow in the exhaust gas treatment device and/or a surface in the exhaust gas treatment device and a feed point for feeding an additive into the exhaust gas treatment device to impinge upon the electric heater, includes supplying additives to the feed point, determining an operational state of the exhaust gas treatment device, in which deposits can impinge upon the electric heater, using at least one state variable, determining a cycle frequency in dependence on the operating state when the operating state lies in a predetermined operating state range, and cyclically activating and deactivating the electric heater using the determined cycle frequency when the determined operating state lies in the predetermined operating state range. A motor vehicle having the exhaust-gas treatment device is also provided. | 12-18-2014 |
20140373514 | APPARATUS FOR PROVIDING LIQUID ADDITIVE, METHOD FOR ASSEMBLING THE APPARATUS AND MOTOR VEHICLE HAVING THE APPARATUS - An apparatus for providing liquid additive includes a tank for the liquid additive which has at least one heat distribution structure for distributing heat in a first tank section. A delivery unit is inserted into the tank for removing the liquid additive from the tank. The delivery unit includes at least one heating device. The heating device of the delivery unit and the heat distribution structure of the tank are connected to each other by at least one thermal coupling. A method for assembling the apparatus and a motor vehicle having the apparatus are also provided. | 12-25-2014 |
20150113956 | METHOD FOR METERING A REDUCING AGENT INTO AN EXHAUST-GAS TREATMENT DEVICE, EXHAUST-GAS TREATMENT DEVICE AND MOTOR VEHICLE - A method for metering reducing agent to an exhaust gas treatment device having a feed point and an SCR catalytic converter converting nitrogen oxide compounds in the exhaust gas, includes at least: a) calculating the following target conversion rates indicating what fraction of the nitrogen oxide compounds in the exhaust gas can be converted by the catalytic converter: a first rate determined from the power output of an internal combustion engine; a second rate determined from the mass flow of nitrogen oxide compounds in purified exhaust gas; and a third rate determined from a ratio of quantities of nitrogen oxide compounds upstream and downstream of the catalytic converter; b) selecting the lowest rate; c) determining the dosing quantity of reducing agent for the selected rate; and d) dosing the determined dosing quantity into the exhaust gas treatment device. An exhaust-gas treatment device and a motor vehicle are also provided. | 04-30-2015 |
20150113957 | METHOD FOR DETERMINING REDUCING AGENT SLIPPAGE AND MOTOR VEHICLE EMPLOYING THE METHOD - A method for determining reducing agent slippage from an exhaust-gas treatment device includes determining a difference between sensor signals of a second nitrogen oxide sensor and of a device for determining a nitrogen oxide compound quantity upstream of an SCR catalytic converter in an exhaust-gas flow direction; determining a controlling deviation from the difference and a target value of a controlling element; determining a gradient of an integral controlling component; and identifying reducing agent slippage if the controlling deviation exceeds a first threshold value and the gradient exceeds a second threshold value. The method and a corresponding device make it possible to reliably identify reducing agent slippage so that a very fast controlling element can be used. | 04-30-2015 |
20150113958 | Method for feeding reducing agent and motor vehicle and stationary installation in which the method is performed - A method for feeding reducing agent to an exhaust gas mass flow in an exhaust gas treatment device provides a reducing agent feed port, a storage catalytic converter storing reducing agent and an SCR catalytic converter for selective catalytic reduction of nitrogen oxygen compounds in exhaust gas. A first dosing strategy is followed, loading of the storage catalytic converter with reducing agent is monitored and a first target conversion rate is determined based on current loading. Reducing agent is fed according to the first target conversion rate. A current conversion rate obtained with the SCR catalytic converter is determined. The current conversion rate is compared to the first target conversion rate and any deviation is registered. A further dosing strategy, not considering the loading of the storage catalytic converter, is used if the deviation exceeds a first threshold value. A motor vehicle and a stationary installation are also provided. | 04-30-2015 |
20150159536 | METHOD FOR OPERATING A METERING DEVICE, METERING DEVICE AND MOTOR VEHICLE - A method for operating a metering device for a liquid additive includes providing the metering device with at least one pump having a movable pump element carrying out pumping movements to pump the liquid additive and at least one injector connected through a pressure line to a pressure side of the pump and being opened to meter the liquid additive. The injector is opened in a step a). In a step b), the liquid additive is then metered and the pumping movements are counted during metering. In a step c), the injector is then closed. In a step d), the number of pumping movements ascertained in step b) are then compared with the opening time of the injector between step a) and step c) in order to carry out a diagnosis of the operation of the metering device. A metering device and a motor vehicle are also provided. | 06-11-2015 |
20150285119 | Device for providing a liquid additive, and method for heating the additive - A device for providing a liquid additive into an exhaust line includes a tank, a delivery line, a heating element formed of a posistor or PTC material for heating the additive in the tank and/or the delivery line, and a dosing device or doser for dosing the liquid additive. The dosing device has a coil and a movable component and the movable component can be moved by the coil. The coil can be connected electronically in series with the heating element by a first switching element. It is thus possible for an activation current through a heating element formed of a posistor material to be limited in magnitude in an inexpensive manner. | 10-08-2015 |