Patent ID: 8191412
Filing Date: 2012-06-05
Classification: F02D,G07C,Y02T

Abstract:
1. A method for determining a deviation of a fuel quality from a reference fuel quality and for determining a change in exhaust gas emissions caused by this deviation by evaluating pressure waves in a fuel system of an internal combustion engine outfitted with one of a discontinuous fuel delivery and a fuel take-off, the method comprising: detecting pressure oscillations in the fuel system during operation by at least one sensor; determining the deviation of the fuel quality from the reference fuel quality by analyzing the detected pressure oscillations in an electronic monitoring unit; determining, from the deviation of the fuel quality from the reference fuel quality, at least one of: based on the deviation of the fuel quality from the reference fuel quality, at least one of: wherein emissions resulting when a non-reference fuel is used are adapted to the emissions resulting when the reference fuel is used by changing an amount of reduction agent supplied when using a catalytic converter for selective catalytic reduction of nitrogen oxides.