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Along with the evolution of vehicle electronic systems from independent control in each domain system to the integration control of the whole vehicle system, ECU systems have become increasingly complicated and large-scale. This has made it extremely difficult to develop the entire system coherently and efficiently from the functional level down to implementation level. On the other hand, the development methodology focusing on single ECU system used today has been facing an additional challenge because of increasingly strict requirements for safety design based on multi-ECU systems. To address these challenges, we have been working on developing virtual development of Engine ECU by modeling technology. In order to achieve optimum electronic systems, it is necessary to build many real devices and evaluate the performance of systems. However, it is also becoming necessary to build virtual devices because of the increasingly complicated and large-scale systems.

With the development of car electronics, increasing numbers of ECUs are mounted in vehicles and “function integration” and “unification of mechanical and electronic” are moving forward. In order for DENSO to supply customers with the optimum of these increasingly complex products, we use simulations from upstream processes, where there is a lack of design information, and are proceeding with the construction of virtual development environments in order to create products. This paper discusses these development techniques.