Fuel path control of a diesel engine at the operating point of the low load and medium speed

Current control implementations for engines are proving unwieldy for emerging emissions standards and fuel economy demand. Calibration is becoming progressively more complex as the number of controlled variables increases. The issues are acute with diesels. We describe a project in which a detailed investigation of the fuel path dynamics in a modern engine is made. This is an initial work about diesel engine fuel path control. In order to facilitate the control development, a medium speed (1550 rpm) and low torque (250Nm) point is chosen to develop the control strategy as it is believed that this is the safe point to start with the fuel path work. The development of fuek path control is difficult as the nature of fuel injection parameters affects the whole engine performance significantly and quickly. This paper demonstrates a closed-loop control and an architecture of controllable injection for C6.6 engine based on predictive control that could control exhaust temperature, of nitrogen oxides (NOx) and particular matters (PM) without changing the fuel quantity at medium speed and low load point.