Jörg Remele

A real-time nonlinear MPC scheme with emission constraints for heavy-duty diesel engines

This contribution introduces a nonlinear model predictive control (MPC) algorithm for diesel engines. Inequality constraints, e.g. emission limits, are taken into account by an augmented Lagrangian formulation in order to provide a time and memory efficient algorithm that is suitable for a future ECU implementation. In view of a practical application and for the sake of a modular framework, the MPC scheme assumes the existence of a subordinate air path controller and therefore accounts for the closed-loop air path dynamics within the MPC prediction. The performance and computational efficiency of the MPC scheme are demonstrated by means of GT-POWER simulations and a runtime analysis.

The new MTU series 2000 marine engine

Engines for fast ships have always been a competence of MTU Friedrichshafen. With the new series 2000 CR the company is now continuing this tradition. The engines in this series use state-of-the-art technologies so they are more powerful, more economical and cleaner than the preceding 2000 series. The basic concept, charging, injection, and electronics have been redesigned. Use of the common rail injection system has given the series its name of 2000 CR.

Der neue Schiffsmotor der MTU-Baureihe 2000

Motoren fur schnelle Schiffe sind seit jeher eine Kompetenz der MTU Friedrichshafen. Mit der neuen Baureihe 2000 CR setzt das Unternehmen diese Tradition fort. Die Motoren dieser Baureihe verwenden modernste Technologien und sind damit leistungsstarker, sparsamer und sauberer als ihre Vorgangerbaureihe 2000. Grundkonzept, Aufladung, Einspritzung und Elektronik wurden neu gestaltet. Die Verwendung des Common-Rail-Einspritzsystems verleiht der Baureihe den Namen 2000 CR.

Nonlinear MPC with emission control for a real-world off-highway diesel engine

This contribution demonstrates the practical realizability of a tailored real-time nonlinear model predictive control (MPC) scheme for off-highway diesel engines. Besides controlling the torque and emissions, the MPC accounts for inequality constraints such as the maximum cylinder pressure by means of an augmented Lagrangian formulation. In addition, the heat-up of the exhaust gas aftertreatment system, e.g. for the regeneration of a diesel particulate filter, is facilitated with a warm-start strategy that enables the smooth activation of the inequality constraints. Experimental results from a testbench of the off-highway diesel engine within a wide operation range demonstrate the efficiency of the control scheme.

The new ADEC engine management system from MTU

The increased demands on the MTU Friedrichshafen engine Series 2000 and 4000 require not just continuous development of the engine itself but simultaneously also of the engine electronics. The ADEC engine management system (Advanced Diesel Engine Control) represents a quantum leap in this respect: Apart from requirements such as more stringent emission legislation worldwide, increase in power output, reduction of life cycle costs and increase in maintenance-friendliness the possibility of use for different applications across the entire Off-Highway segment was also taken into account. Despite more stringent emission legislation, ADEC allows MTU to increase the performance of current large diesel engines. However, these possibilities also require dealing with subjects that to date were primarily found in the IT sector.

Das neue MTU-Motormanagementsystem ADEC

Die gewachsenen Anforderungen an die Motorbaureihen 2000 und 4000 der MTU Friedrichshafen verlangen parallel zur Weiterentwicklung des Motors eine kontinuierliche Weiterentwicklung der Motorelektronik. Das Motormanagementsystem ADEC („Advanced Diesel Engine Control“) stellt diesbezuglich einen Quantensprung dar: Anspruche wie weltweit verscharfte Umweltgesetze, Leistungssteigerung, Verringerung von Lebenszykluskosten und Wartungsfreundlichkeit wurden ebenso berucksichtigt wie der querschnittliche Einsatz fur unterschiedliche Anwendungen im gesamten Off-Highway-Markt. Trotz verscharfter Emissionsgesetzgebung kann die MTU mit der ADEC die steigende Leistungsfahigkeit heutiger Grosdieselmotoren darstellen. Aus diesen Moglichkeiten erwachst allerdings auch die Notwendigkeit, sich mit Themen auseinanderzusetzen, die bisher primar im Bereich der EDV angesiedelt waren.