| Patent application number | Description | Published |
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| 20100134123 | SENSOR SYSTEM HAVING A MAGNETOELASTIC DEFORMATION ELEMENT - A sensor system is provided having an at least partially magnetoelastic deformation element for measuring pressures, caused by a fluid, that are able to be applied to the magnetoelastic deformation element, having a magnetic circuit formed via a magnetic flux feedback and having a sensor unit and an evaluation unit. The sensor unit is positioned at the deformation element and the evaluation unit having an evaluation coil is structurally separated from, yet inductively coupled to the sensor unit. The sensor unit has a sensor coil positioned on the deformation element and the evaluation unit has the evaluation coil that is inductively coupled to the sensor coil, the sensor coil forms a resonant circuit, using its own parasitic capacitance or using an additional capacitance, which is able to be energized by the evaluation coil in free resonance with strong or weak inductive coupling by a magnetic circuit enclosing the two coils. Alternatively, the sensor unit and the evaluation unit may be coupled via a magnetic circuit having a flux feedback, and the evaluation coil may be wound around the fixed or mountable flux feedback, a permeability change effected by the application of pressure to the deformation element, and thus a change in the inductance of the evaluation coil being able to be determined. | 06-03-2010 |
| 20100148796 | DEVICE FOR CHECKING THE ATTACHMENT OF A CIRCUIT BOARD ON A CARRIER - A device for checking the attachment of a circuit board on a carrier, in particular a housing, has on each attachment point a pair of mutually associated electrically conductive contact surfaces and an electrically conductive connecting arrangement, which connects the circuit board mechanically to the carrier and at the same time connects the electrically conductive contact surfaces of the respective pair electrically to each other. At least one of the electrically conductive contact surfaces of a pair is situated on the circuit board. The other contact surface may likewise be situated on the circuit board or, for an electrically conductive carrier, even on the carrier. The respective pairs of conductive contact surfaces and the electrically conductive connecting arrangement form an electric circuit, which may be connected in a series circuit or a parallel circuit. An evaluation circuit checks whether the electric circuit thus formed is closed. | 06-17-2010 |
| Patent application number | Description | Published |
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| 20080279742 | Method and Device For Desulfating a NOx Storage Catalyst - The desulfation of a NOx storage catalytic converter takes place in two phases. In a first phase, the NOx storage catalytic converter is alternately exposed to rich and lean exhaust gas. In a subsequent second phase, the NOx storage catalytic converter is operated using rich exhaust gas. This method permits the quantity of hydrogen sulfide that occurs during the desulfation process to be minimized and achieves at the same time an efficient removal of sulfate from the deep-seated layers of the NOx storage catalytic converter. | 11-13-2008 |
| 20090038595 | Method and Device for Operating an Internal Combustion Engine - An internal combustion engine has at least one cylinder and an exhaust gas tract, in which an exhaust gas sensor, that can be heated in a controlled manner, is arranged. An exhaust gas temperature of an exhaust gas flowing in the exhaust gas tract is determined as a function of the heating power (P_HEAT) supplied to the exhaust gas sensor. An estimated value of the exhaust gas temperature is determined as a function of a physical model of the combustion of the air/fuel mixture and of the exhaust gas tract as a function of at least one operating variable of the internal combustion engine, but independent of the heating power supplied to the exhaust gas sensor. Model parameters of the physical model are adapted as a function of a deviation of the estimated value and of the exhaust gas temperature determined by the supplied heating power. | 02-12-2009 |
| 20090077951 | Method and Device for Operating an Internal Combustion Engine - An internal combustion engine has a NOX storage catalyst. A storage capacity (NOX_STC) of the NOX storage catalyst is determined for the purpose of operating the internal combustion engine. The temperature (TEMP) of the NOX storage catalyst is increased if the storage capacity (NOX_STC) is less than a predefined threshold value. | 03-26-2009 |
| 20090126344 | Method and Device for Determining an Oxygen Storage Capacity of a Catalytic Converter of an Internal Combustion Engine and Method and Device for Determining a Dynamic Time Duration for Exhaust Probes of an Internal Combustion Engine - An exhaust gas catalytic converter is laden with oxygen until it is saturated at least upstream of an exhaust gas probe. A predefined first rich air/fuel ration is set in a combustion chamber of a cylinder. A first oxygen storage capacity value is determined as a function of the measurement signal of an exhaust gas probe and the predefined first rich air/fuel ratio. The exhaust gas catalytic converter is laden with oxygen until it is saturated. A predefined second rich air/fuel ration is set in the combustion chamber of the cylinder. A second oxygen storage capacity value is determined as a function of the measurement signal of the exhaust gas probe and the predefined second rich air/fuel ration. A corrected oxygen storage capacity value is determined as a function of the first and second oxygen storage capacity values. | 05-21-2009 |
| 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 |
| 20110077818 | METHOD AND DEVICE FOR THE DIAGNOSIS OF AN NOX SENSOR FOR AN INTERNAL COMBUSTION ENGINE - IN a method and a device for the diagnosis of an NOx sensor ( | 03-31-2011 |
| 20110113751 | Method and Device for Determining a Dynamic Time Duration for Exhaust Gas Probes of an Internal Combustion Engine - An exhaust catalyst is charged with oxygen until saturated. A given first rich air/fuel ratio (LAM | 05-19-2011 |
| 20110138876 | Method and Device for Determining an Oxygen Storage Capacity of a Catalytic Converter of an Internal Combustion Engine and Method and Device for Determining a Dynamic Time Duration for Exhaust Probes of an Internal Combustion Engine - An exhaust as catalytic converter is laden with oxygen until it is saturated at least upstream of an exhaust as probe. A predefined first rich air/fuel ration is set in a combustion chamber of a cylinder. A first oxygen storage capacity value is determined as a function of the measurement signal of an exhaust as probe and the predefined first rich air/fuel ratio. The exhaust as catalytic converter is laden with oxygen until it is saturated. A predefined second rich air/fuel ration is set in the combustion chamber of the cylinder. A second oxygen storage capacity value is determined as a function of the measurement signal of the exhaust as probe and the predefined second rich air/fuel ration. A corrected oxygen storage capacity value is determined as a function of the first and second oxygen storage capacity values. | 06-16-2011 |
| 20110231079 | METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - According to a current operating state (BZ) of an internal combustion engine and/or a specified particle number emission limit (PE), a minimum hydrocarbon concentration (HCMK) of a combustion chamber exhaust gas of the internal combustion engine that is required to comply with the specified particle number emission limit is determined. An operation (B) of the internal combustion engine is specified to achieve a hydrocarbon concentration (HCK) of the combustion chamber exhaust gas that is at least as large as the determined minimum hydrocarbon concentration (HCMK). | 09-22-2011 |
