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This paper presents a study performed in 10 vehicles available in Brazilian market where the drivability with ethanol and gasoline, also referred as gasohol were compared. The motivation for this work came from the constant competition of the automotive industry, where engineers are searching for ways to improve the quality of the products aiming the “best in class” drivability with the best cost efficiency. For the Brazilian market, a further complexity is added to the development and verification process, which is the need to design and verify the controls and calibration considering the two fuels available in the market, the ethanol and the gasoline. In order to determine how the drivability is impacted by the ethanol, the paper presents a study where the drivability data were generated using the objective drivability measurement system AVL-DRIVE™.

The Diesel engine popularity has been increasing for the last years, mainly in Europe, where the Diesel passenger cars fleet surpassed the petrol one. Such popularity is not only a result of fuel consumptions benefits, but also a result of a combination of all engine attributes performance including powertrain NVH and drivability. Thus, the common rail technology must provide capabilities to improve the attributes for this competitive and demanding market. This paper intends to idealize the drive-by-wire response in Diesel engines, which is a technological feature that contributes to achieve the customer vehicle performance feel and drivability expectation.

The new 2005 Brazilian emissions legislation for diesel vehicles, based on EURO III, requires more complex emission control systems, like electronic engine management systems. The introduction of an electronic engine management system allows improvement in important aspects to the customer perception, such as drivability and vehicle noise levels. The objective of this paper is to compare the gains in terms of drivability of vehicles with electronic engine management system and conventional mechanical system, based on acceleration curves, driving behavior and vehicle speed