New Control Concepts for Gasoline, Diesel and Hybrid – Theory and Practice of Algorithm Design

Authors

Dr. H. Hülser, Dipl.-Ing. K. Neunteufl, Dr. C. Roduner, Dipl.-Ing. R. Schneider, AVL List GmbH, Graz

Year

2006

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 622

Summary

Ever more stringent emission levels impose more degrees of freedom for electronic control of actuators in a powertrain. Combined with decreasing development times, new approaches for development and calibration of control algorithms are required. Conventional PID control reaches limits when two highly interacting variables that show a similar dynamic response have to be controlled simultaneously. AVL’s MMCD™ process opens the opportunity to develop control algorithms for singleand multivariable control tasks efficiently based on a common methodology and to calibrate them in a mostly automated way. A dynamic behavioural model of the controller plant is automatically calibrated. The controller including the parameters is automatically derived from this model. Only few parameters remain to be calibrated manually. The advantages to reduce the development time are highlighted. This process is illustrated using co-ordinated control of exhaust gas recirculation and boost pressure as an example. For HD Truck engines, transient NOx emissions could be reduced in the double-digit range while PM emissions remain unchanged. The same methodology was used to develop closed-loop engine torque control, based on an incylinder pressure sensor.

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