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In this paper a model for Automotive Air Conditioning evaporators is presented, including a comparison between calculated and measured results for two different types of evaporator: tube and fins and plate and fins. The development of the model has been carried out by the Universidad Politécnica de Valencia in co-operation with the Universidad Politécnica de Catalunya and two companies: FASA-RENAULT and FRAPE-BEHR, under a research project supported by the Spanish Agency for R&D: CICYT. The input data for the model are the HEX geometry and the inlet conditions and mass flow rate of both flows. Then the model calculates the outlet conditions and all the performance parameters. The developed model is able to take into account the following aspects of the HE: Tube or plate evaporators as well as any flow configuration: parallel, counter-flow, cross-flow and multi-pass.

In this paper a torque strategy used by RENAULT for the control of a spark ignition engine is presented. With this new strategy for engine control, it was necessary to develop a new motorized butterfly valve. The design and development of this element is described in the paper. This research was carried out through the application of both modeling techniques using computational tools and experimental techniques on the steady flow rig and the engine bench.

This paper presents the main conclusions of the project carried out by the Department of Advanced Studies in Control of Engines of RENAULT and the group IMST of the Departamento de Termodinámica Aplicada de la Universidad Politécnica de Valencia. The main objectives of this Project was: The characterization of the camless engine prototype by means of the modeling for different engine speeds and loads. The determination of the influence of the external operation conditions on the performance of a prototype of a camless engine, by means of the calculation with the program ECARD.