| Patent application number | Description | Published |
|---|
| 20080264146 | Sensor Element for Particle Sensors and Method for Operating Same - A sensor element for gas sensors for determining the concentration of particles in gas mixtures, especially soot sensors, having at least one measuring device exposed to the gas to be determined, at least one heating element integrated into the sensor element and at least one temperature measurement element integrated into the sensor element, the heating element being situated within the sensor element spatially between the measuring device and the temperature measurement element. | 10-30-2008 |
| 20090013758 | PROCEDURE FOR OPERATING A PARTICLE SENSOR THAT IS ARRANGED DOWNSTREAM AFTER A PARTICLE FILTER AND DEVICE FOR IMPLEMENTING THIS PROCEDURE - A procedure for operating a particle sensor that is arranged downstream after a particle filter, at which an ash contamination can occur, and a device for implementing the procedure, are suggested. A remaining operating time determination determines the remaining operating time of the particle sensor related to an ash contamination. Alternatively or additionally the remaining operating time determination provides a correction signal, with which the sensitivity loss of the particle sensor caused by the ash contamination can be considered. | 01-15-2009 |
| 20090019918 | PROCEDURE FOR OPERATING A COLLECTING PARTICLE SENSOR AND DEVICE FOR IMPLEMENTING THIS PROCEDURE - A procedure for operating a collecting particle sensor, which is provided with measuring phases, during which particles that are contained in an off-gas stream accumulate on a measuring route, and a device for implementing this procedure are submitted. Protection phases are provided, during which at least one measure for diminishing the accumulation of particles on the measuring route is adopted. The measure according to this invention prevents a decrease of the sensitivity of the particle sensor over a long period of time. | 01-22-2009 |
| 20090314060 | CIRCUIT ASSEMBLY FOR OPERATING A GAS SENSOR ARRAY - The invention relates to a circuit assembly for operating a sensor array, in particular, a gas sensor array for detecting gases, which comprises at least one signal line. According to said invention, a signal line is divided into two parallel line branches with a sensor and a diode, preferably a Schottky diode, arranged in each of said two parallel line branches, whereby the two diodes have opposite electrical polarity. The use of different polarity diodes permits actuation of both sensors through only one signal line. It can be determined if the current flows through one or the other of both sensors by merely polarizing the electrical potential applied to the signal line appropriately. | 12-24-2009 |
| 20100180669 | MONITORING OF A PARTICLE LIMIT VALUE IN THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for diagnosing a particle filter used for filtering particles out of the exhaust gas of an internal combustion engine, wherein a collecting particle sensor is disposed downstream of the particle filter in the direction of flow of the exhaust gas and wherein a measurement for the loading of the particle sensor is determined from an output signal of the particle sensor. Provision is thereby made for the temporal integral of a parameter correlating to the particle emissions of the internal combustion engine to be formed during a measurement cycle, for the measurement for the loading of the particle sensor to be associated with the integral at least one measurement point in time during the measurement cycle and for a defective particle filter to be suggested if the measurement for the loading of the particle sensor is higher than a loading threshold value associated with the integral or if the integral is lower than an integral threshold value associated with the measurement for the loading of the particle sensor. The invention further relates to a device for carrying out the method. The method and the device allow for the diagnosis of the functionality of a particle filter in the exhaust gas of an internal combustion engine during any operating conditions passed through by the internal combustion engine. | 07-22-2010 |
| 20110113854 | DEVICE FOR OPERATING A PARTICLE SENSOR - The invention relates to a device for operating a particle sensor in the exhaust gas duct of an internal combustion engine, the particle sensor comprising an interdigital electrode for determining the particles contained in the exhaust gas and a heater for regenerating said particle sensor and an engine management system being associated with the internal combustion engine. Provision is thereby made for a probe control unit to be connected to said particle sensor, for the probe control unit to be disposed in a separate assembly between said particle sensor and the engine management system and for said probe control unit to be connected to said engine management system via a digital bus or an analog interface. The invention relates further to a corresponding method. Device and method allow for the autonomous operation of a particle sensor without the engine management system having to be configured for the operation of said particle sensor. | 05-19-2011 |
| 20110252768 | METHOD AND APPARATUS FOR THE SELF-DIAGNOSIS OF AN EXHAUST GAS PROBE - A method for the self-diagnosis of an exhaust gas probe ( | 10-20-2011 |
| 20110314899 | METHOD AND DEVICE FOR OPERATING A PARTICLE SENSOR - A method for operating a particle sensor ( | 12-29-2011 |
