- Category Technical paper
- Related event International Congress : SIA Powertrain - Rouen 2016 - 1 & 2 June 2016
- Edition SIA
- Date 06/01/2016
- Author D. Taindjis, G. Dober, N. Guerrassi, J. Balland - Delphi / W. Baumann - IAV GmbH / R. Baar - Technische Universität Berlin
- Language English
Type PDF file (430.69 Ko)
(Downloadable immediately on receipt of online payment)
- Number of pages 10
- Code R-2016-01-12
- Fee Free
Because of the low dynamics exhibited by the NEDC homologation cycle, the software control structures and calibration methodologies currently used are designed to optimize steady-state engine performance. However, new regulations (GTR-15 and RDE) will make use of much more transient testing conditions, for which the current strategies and procedures are suboptimal.
In order to control emissions during transient events, new model-based software control structures have been designed, providing additional degrees of freedom in terms of calibration, and requiring as well new calibration processes.
Building on the existing in-house calibration tool used at Delphi, a complete calibration workflow has been developed for transient control structures. Data has been gathered on multiple engine operating points, and used to build statistical models, to elaborate new optimisation algorithms, fitting the model-based control structure targeted. A qualitative and quantitative comparison with the current empirical expert-based calibration for transient control, has then been performed in dynamic conditions.
The new calibration workflow shows a benefit in transient performance, calibration time, and robustness.
This process opens the way to successfully calibrating complex physically-based software structures, to tackle emissions reduction problems for transient driving cycles.