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METHOD FOR CHECKING THE FUNCTION OF A PRESSURE SENSOR IN THE AIR INTAKE TRACT OR EXHAUST GAS OUTLET TRACT OF AN INTERNAL COMBUSTION ENGINE IN OPERATION AND ENGINE CONTROL UNIT
METHOD FOR CHECKING THE FUNCTION OF A PRESSURE SENSOR IN THE AIR INTAKE TRACT OR EXHAUST GAS OUTLET TRACT OF AN INTERNAL COMBUSTION ENGINE IN OPERATION AND ENGINE CONTROL UNIT
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机译:在操作和发动机控制单元中检查内部进气发动机进气道或排气出口道中压力传感器功能的方法
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摘要
A method for checking the function of a pressure sensor in the air intake tract or gas outlet tract of an internal combustion engine and to an engine control unit for carrying out the method and based on measuring dynamic pressure oscillations of the intake air or the exhaust gas by the relevant pressure sensor and, on the basis of the pressure oscillation signal obtained, respectively determining with the aid of a discrete Fourier transformation for a number of selected signal frequencies in each case a value of a specific operating characteristic of the internal combustion engine and deviation values of the values determined for the different signal frequencies from one another. Depending on whether deviation values determined fall below or exceed a predetermined limit value, the satisfactory function of the pressure sensor is confirmed, or a malfunction of the pressure sensor is diagnosed.
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