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Model-based development (MBD), which makes it possible to study and adjust contradictory requirements between a large number of functions and systems to a high level in a short period of time was implemented within an engine development. In fact, however, elevating engine systems to more advanced levels is a challenge even by satisfying the stand-alone requirements of components. In addition, a still higher level of technology is required for the conflicting relationships between multiple functions, e.g. the power output of an engine and its strength and durability performance, and the reconciliation between the numerous related systems that comprise it. Such reconciling technology requires the consideration of overall optimization that envisions design over a wide range. For present-day development, this would require an extensive period of examination over several years. This presents the issue of requiring an extended period for verification.

A light weight,multifunctional plastic reinforcement has been developed for the outer body panels of vehicles. This new plastic reinforcement,composed mainly of polyvinylchloride resin, epoxy resin and an organic foaming agent, provides a 63% weight reduction over conventional plastic reinforcements, while adding the damping function to outer body panels. This paper introduces the process followed in developing the new plastic reinforcement and describes its characteristics. This new plastic reinforcement is already employed in the Nissan S-Cargo model, and it will be adopted in other passenger car models to be released in the near future.