Patent application number | Description | Published |
20080196404 | Method And Device For Controlling Or Regulating The Boost Pressure Of An Internal Combustion Engine Having A Compressor - A method and a device for regulating the boost pressure of an internal combustion engine having a compressor, which set a setpoint boost pressure in a rapid manner and without overshooting. An actuator is provided by which the boost pressure of the compressor is set. An actuating variable for the actuator is determined as a function of a rotational speed of the compressor. | 08-21-2008 |
20080234887 | Method and device for monitoring an exhaust gas turbocharger of an internal combustion engine - A method and a device are described for monitoring an exhaust gas turbocharger of an internal combustion engine, which allow a diagnosis of the oil supply to an exhaust gas turbocharger. In at least one operating state of the internal combustion engine, a variable that is characteristic for the rotational speed of the exhaust gas turbocharger is ascertained. A variable that is characteristic for the rotational speed of the exhaust gas turbocharger is ascertained in the at least one operating state of the internal combustion engine. An operating state which is characterized by a change in the exhaust gas mass flow, which is linked to a change in the variable that is characteristic for the rotational speed of the exhaust gas turbocharger within a predefined tolerance range, is selected as the at least one operating state. A fault is recognized if one or more values outside the predefined tolerance range are established for the change in the variable that is characteristic for the rotational speed of the exhaust gas turbocharger in the selected operating state. | 09-25-2008 |
20080236263 | Method and device for analyzing a sensor element - A method and a device for analyzing a sensor element are described, which allow a temperature dependence of the sensor element to be considered without an additional temperature sensor in particular. The sensor element outputs a signal as a function of a measured variable. The signal of the sensor element is analyzed in a first analysis operating mode to detect the measured variable. The signal of the sensor element is analyzed in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable. | 10-02-2008 |
20090173568 | Device and method for active noise cancellation in exhaust gas channel of a combustion engine - In a method and a device for canceling the noise in an exhaust gas channel of a vehicle, a noise signal is received from the exhaust gas channel using a sound sensor, and a frequency signal which has the same amplitude and the opposite phase as the noise signal is generated. The generated frequency signal is acoustically mixed with the noise signal in the exhaust gas channel using a sound converter, there by reducing the noise in the exhaust gas channel. In addition, the temperature in the exhaust gas channel is calculated based on the received sound signal. | 07-09-2009 |
20090260916 | DEVICE AND METHOD FOR ACTIVE NOISE CANCELLATION IN AN EXHAUST GAS CHANNEL OF A COMBUSTION ENGINE - The invention relates to an active noise cancellation device. The invention proposes a device and a method used to cancel the noise in an exhaust gas channel of a vehicle A noise signal is received form the exhaust gas channel, using a sound sensor, a frequency signal which has same amplitude as of noise signal but opposite phase, is generated, the generated frequency signal is acoustically mixed with the noise signal in the exhaust gas channel, using a sound converter, there by reducing the noise in the exhaust gas channel. The device also takes into account the reflection of the sound caused by an obstacle near the exhaust gas channel. A distance measuring device which is external to the active noise cancellation device provides the information about the distance between the obstacle and the exhaust gas channel. Based on the distance, the frequency signal is suitably modified to reduce the effect of sound reflections caused by the obstacle. | 10-22-2009 |
20100107747 | METHOD FOR INCREMENTALLY ASCERTAINING A ROTATION ANGLE OF A SHAFT - A method for incrementally ascertaining a rotation angle of a shaft, in particular of a crankshaft of an internal combustion engine, the shaft being connected to a sensor wheel having teeth and tooth gaps, and at least one sensor being associated with the sensor wheel, the sensor generating a square-wave signal as an output signal which may assume a first value or a second value, and a signal edge being associated with a tooth edge, and the position in time of a counteredge with respect to the edge encoding a direction of rotation, an assignment of a direction of rotation reversal point to a tooth of the sensor wheel or a tooth gap of the sensor wheel being encoded by the position in time of the counteredge with respect to the edge, the rotation angle being ascertained by adding an increment for each signal edge to a counter, after a direction of rotation reversal while a tooth passes the sensor, a half-increment, having a sign of the direction of rotation after the direction of rotation reversal, being incremented once and in the event of a direction of rotation reversal while a tooth gap passes the sensor, a half-increment, having a sign of the direction of rotation prior to the direction of rotation reversal, being incremented once. | 05-06-2010 |
20100313855 | Method and device for providing a rotational speed and temperature indication of a supercharging device for an internal combustion engine - A detection circuit for providing indications of a rotational speed and a temperature of a supercharging system for an internal combustion engine is provided, which detection circuit includes: a rotational speed sensor for providing a periodic detection signal having a frequency dependent on a rotational speed in the supercharging system; a temperature sensor for detecting a temperature in the supercharging system; and a modification unit for providing a periodic output signal having a periodicity dependent on the periodic detection signal, and for setting a time length of a signal pulse of the periodic output signal as a function of the detected temperature, so that the periodic output signal provides the rotational speed indication by its periodicity and the temperature indication by the time length of the signal pulse. | 12-16-2010 |
20100332180 | METHOD AND DEVICE FOR DETERMINING ONE OR MORE ROTATIONAL SPEEDS OF A TURBOCHARGING DEVICE, IN PARTICULAR FOR AN INTERNAL COMBUSTION ENGINE - A method is described for determining information about a rotational speed of a compressor, in particular a turbocharger, by providing a measuring signal, in particular a microwave measuring signal, which is directed at a compressor impeller of the compressor, so that the measuring signal is reflected on revolving blades of the compressor impeller, detecting the measuring signal reflected by one or more blades, and determining the information about the rotational speed as a function of the reflected measuring signal. | 12-30-2010 |
20130133406 | DEVICE FOR MEASURING A COMPOSITION OF A FUEL MIXTURE - A method and a device for determining a composition of a fuel mixture, in particular for determining the ethanol content and/or a water component in the fuel mixture. Fuel flows sequentially through spatially separated sensor elements. The sensor elements generate time-dependent output signals, which are unambiguously dependent on the ethanol content of the fuel mixture. A difference between the time-dependent output signals is ascertained and subjected to a plausibility check. A received plausibility-checked output signal is ascertained, having at least one item of information about the direction of change in the ethanol content of the fuel mixture. | 05-30-2013 |
20140107905 | METHOD FOR DIAGNOSING A SUPERCHARGING SYSTEM OF INTERNAL COMBUSTION ENGINES - A method for diagnosing a forced induction system is described, in which by measured data acquisition the frequency spectrum generated upon rotation of the forced induction system is acquired, and by measured data evaluation the acquired frequency spectrum is evaluated using frequency analysis. A frequency characteristic of the forced induction system, ascertained by frequency analysis, for at least one predefined operating point of the forced induction system is compared with a predefined vehicle-specific frequency characteristic of the forced induction system for the at least one predefined operating point. | 04-17-2014 |