DETERMINATION OF FUEL PROPERTIES AND THEIR INFLUENCE ON EXHAUST EMISSIONS DURING COMBUSTION ENGINE OPERATION

摘要

In a method for determining the deviation of the quality of a fuel from a reference quality and the resulting change in exhaust emissions by evaluating pressure waves in the fuel, it is provided that the internal combustion engine is or is equipped with discontinuous fuel delivery and / or fuel extraction and during the In operation, the pressure fluctuations that develop in the fuel system are detected with the aid of a sensor and, by analyzing this pressure curve in an electronic control unit, the deviation from a fuel reference quality and / or the fuel type can be determined and, from this, deviations of the raw emissions from the raw emissions when using the reference fuel and / or Influences on the behavior of an aftertreatment system connected downstream of the internal combustion engine, which is changed compared to operation with reference fuel, are determined and / or when a deviation from that is determined Reference fuel quality, the service intervals and / or the engine oil change intervals can be changed.