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The improved steady state performance of engine control and aftertreatment makes the transient contribution to the total emissions increasingly important. As several control mechanism, e.g. the exhaust recirculation, are set for all cylinders at a time, misbalancing represents a practical limit to the achievable emission control. This paper tackles both issues at a time using a virtual soot sensor...
Caused by the demanding and more and more stringent legislated emission limits for passenger car engines, the effect of transient emission peaks becomes more and more important for the overall emission limits. In case of Diesel engines, the two main concerned pollutants are NOx and PM and typically the compliance with the legislation is achieved by a suitable control of the fuel and air system of...
Nitrogen oxides (NOx) are besides particulate matter (PM), especially for diesel engines, the most relevant emission components. Against this background and the fact that passenger car emission legislation is permanently becoming stricter, there is still a growing interest in minimizing these pollutants. Beside the highly nonlinear behavior of engines also the tradeoff between PM and NOx is a challenging...
Nitrogen oxides (NOx) emission control is a critical task of engine control as far as raw emissions and after treatment is concerned. Hardware NOx sensors are now available, but they still have several limitations, starting from their costs. Against this background, a lot of work inside both companies and in the academy has been done to develop virtual sensors for these emissions. In this paper, we...
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