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"From noise to sound": NVH-oriented design of a small Fiat engine
Published September 05, 1996 by AVL List GmbH in Australia
In the initial approach and subsequent development of a new engine it is essential to keep in mind at all times that it is destined to power a vehicle and that the customer is primarily interested in vehicle performance as opposed to engine characteristics.
It is therefore of fundamental importance to realize, since the earliest stages of the design stage, in what ways engine features (or, more precisely, the characteristics of its components) will combine, first of all with one another, and then with those of all the other vehicle subsystems, to generate the performances perceived by the potential customer.
This applies in particular to comfort performances (the vehicle's NVH performances) which, together with fuel consumption, already are, and will be in future to an ever greater extent, the two primary sales levers, not least because the market now takes it for granted that adequate safety and reliability levels are ensured by all manufacturers.
These guidelines, which are currently inspiring the development of a new aluminum block for a small engine, as well as the initial results of the numerical simulations, are described and discussed in this paper.