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Serial embedded software development has to handle variations of system components or of requirements at any time in the development process. One of the most efficient ways to overcome these challenges is to use the strength of the model-based development. The increasing complexity and development flexibility of the systems need further upgrades in developmental methods and tools as well as more accurate system plant models. Build together as an integrated chain represents a powerful issue solver for the developing engineer. It makes it easier to be either ahead of the competition with smart technical solutions in the market or to develop low cost technical solutions by high quality software solutions.

Future regulations require intelligent solutions for Diesel engine emission reduction. Lowest engine out emissions are necessary to reduce the requirements of exhaust aftertreatment systems. Alternative Diesel combustion processes offer the potential of significant NOx reduction while keeping particulates low, but they are in some load areas highly sensitive to the cylinder charge conditions. Whereas mixture preparation and combustion are already well developed in the stationary mode, in-vehicle operation has not been mastered previously. This paper describes the author's approach towards Intelligent (IQ) Emission (Em) Reduction with modular and tailored solutions for both combustion system and electronic control. The enabler for the vehicle application of such combustion systems is an intelligent closed-loop combustion control based on a cylinder pressure sensor, that is presented in this paper.

Based on an oxygen storage model of the three-way catalyst (TWC) an indirect adaptive control system is proposed. Utilizing a recursive Markov estimate method, the parameters involved in the model are identified on-line by measuring the upstream and downstream air-to-fuel ratios. These parameters are then used to estimate the relative oxygen level in the TWC which in turn is used as the control variable for the primary controller.