The Challenge of Fuel Path Control at High Load Conditions

详细信息    查看全文

• 作者：Jiamei Deng ^{j.deng@lboro.ac.uk" class="auth_mail" title="E-mail the corresponding author} ; Richard Stobart ^{r.k.stobart@lboro.ac.uk" class="auth_mail" title="E-mail the corresponding author} ; Bastian Maass ^{b.maass@lboro.ac.uk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Diesel engine ; model predictive control ; control system ; optimization ; optimal control
• 刊名：IFAC-PapersOnLine
• 出版年：2011
• 出版时间：January 2011
• 年：2011
• 卷：44
• 期：1
• 页码：2248-2253
• 全文大小：423 K

文摘

Increasing emissions standards and fuel economy have forced engine designers to incorporate increasing numbers of degrees of control freedom into the engine. Consequently, calibration is becoming progressively more complex where the issue is most acute with diesel engines. This paper presents a project in which a closed loop controller is used in diesel engine fuel path, where no new calibration is required if any variation occurs. This is an initial investigation into diesel engine fuel path control. In order to prove that such a control technology could be developed over the whole speed and torque operating range, a high speed (2050 rpm) and the high torque (357Nm) point are chosen for investigations into control. This represents a challenging engine conditions for the application of control systems because of the limited time available for air supply and the need to complete combustion quickly. At these conditions the control authority is limited and the ability to detect for example small variations in torque and speed are quite limited owing to the high torque conditions. This paper demonstrates a closed-loop control at a high load condition and presents an architecture of controllable injection for a Caterpillar C6.6 engine using predictive control that includes exhaust temperature, of nitrogen oxides (NO_x) and particulate matters (PM) without changing the fuel quantity.