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A Design of experiments methodology was carried out to investigate the effects of compression ratio, cylinder head material, and fuel composition on the engine speed, fuel consumption, warm-up time, and emissions of a carbureted single cylinder air-cooled spark ignited engine. The work presented here is aimed at finding out the sensitivity of engine responses, as well as the optimal combination among the aforementioned parameters. To accomplish this task two cylinder heads, one made of aluminum and the second one of cast iron, were manufactured; an antechamber-type adapter for the spark plug to modify the combustion chamber volume was used. Ethanol/gasoline blends containing 10 and 20 volume percent ethanol were prepared. Engine performance was evaluated based on the changes in engine speed at idle conditions. The concentrations of CO2, CO, and HC in the exhaust were recorded.

The main objective of this study is to apply a dynamic parameter identification methodology to a double-wishbone type front suspension of a race car. Two methodologies for identification are presented: the first one is based on the Singular Value Decomposition (SVD) and elimination by means of the relative standard deviation of each parameter, while the second comprises three consecutive steps: the elimination of those less contributive parameters, the application of SVD method and elimination by relative standard deviation. The physical feasibility of the obtained parameters is taken into account. Both methodologies are validated with collected data of virtual simulation in a computational package program.