Simulation and Control of a HD Diesel Engine Equipped with New EGR Technology

Abstract

<div class="htmlview paragraph">A dynamic model of a Heavy Duty (HD) turbocharged and aftercooled diesel engine was developed. The engine was equipped with high pressure diesel injection, a Variable Geometry Turbine (VGT) and an Exhaust Gas Recirculation (EGR) system. This engine was targeted at meeting EURO4 emission requirements. The final emission results were 2.4 g/kWh NO<sub>x</sub> and 0.107 g/kWh particulates for the European 13 mode test. Better than 3.0 g/kWh NO<sub>x</sub> and 0.10 g/kWh particulates are expected to be characteristic EURO4 emission requirements (approximate year of implementation is 2004).</div> <div class="htmlview paragraph">In the design of the EGR system the model provided initial assessments of the properties of this system. Associated engine and turbocharger behaviour as well as optimal control strategies were predicted.</div> <div class="htmlview paragraph">A transient engine control algorithm was developed using the dynamic engine model. The VGT is closed loop controlled and EGR is shut off during a short time after a load increase. The simulation results were confirmed by actual measurements, demonstrating acceptable transient behaviour.</div>