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Development and Validation of Hierarchical Models for the Design of Engine Control Strategies

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Abstract

The development of mathematical models for the design of controlstrategies for spark ignition automotive engines is described. The objectiveof the models, used for both simulation and optimization analysis, is theprediction of the effects of control strategies on fuel consumption andemissions of a vehicle over arbitrary driving cycles. In order to achievethe best compromise between precision, experimental costs, computationaltime and flexibility, a mixed modelling approach is used, withphenomenological and input-output models integrated within a hierarchicalsystem.

Mean value models have been used to describe the most significant dynamiceffects: (i) air flow. (ii) two phases fuel flow in the intake manifold, and(iii) thermal flow in the cylinder walls. Stochastic effects due to sensorsand actuators can be also predicted.

Two-zone and multizone thermodynamic models for the prediction ofpressure cycle sub-models for engine emissions (HC, CO, andNO x and mechanical losses have been developed. Experimentaldesign techniques are also under development to optimize the interactionsbetween experimental analysis and models. Most of the models have beenintegrated in a computer code, used by a major automotive supplier.

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Authors and Affiliations

  1. Dipartimento di Ingegneria Meccanica, Università di Salerno, 84084, Fisciano (SA), Italy

    Ivan Arsie, Cesare Pianese & Gianfranco Rizzo

  2. CNR, Istituto Motori, Viale Marconi 25, 80125, Napoli, Italy

    Michele Gambino

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  1. Ivan Arsie
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  2. Michele Gambino
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  3. Cesare Pianese
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  4. Gianfranco Rizzo
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Arsie, I., Gambino, M., Pianese, C. et al. Development and Validation of Hierarchical Models for the Design of Engine Control Strategies. Meccanica 32, 397–408 (1997). https://doi.org/10.1023/A:1004299531810

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