Preface：Technologies and processes for establishing products from advanced technologiesDevelopment history of variable compression ratioEvolution of drive-assist technology4. Development for application to productsFlow of product developmentof engineers who made steady progress through research and development, the advancement of manufacturing technology.including For the drive-assist technology ProPILOT, the development of its basic elemental technology began more than 20 years ago, and individual technologies (many of which were the worldʼs first at the time) have been applied to products since then. These technologies have achieved results and gained market experience, and ProPILOT is a compilation of these technologies.The development of a product starts by deciding what characteristics (concepts) to assign to the product. The product concept is determined after performing sufficient market research. Some factors to consider in the research include “Where does the target customers live, and what should the customersʼ social status be? What kind of value do customers desire?” In the meantime, existing technologies, as well as technologies that have undergone research and advanced development over the years, are combined to study whether it is possible to create new value for the target customers. Such values are coordinated as a whole to convert them to characteristics that are consistent as a product. Thus, value is elevated to an attractive product concept. Teams involved in development, planning, design, and marketing and sales performed these activities, and the characteristics of the products were determined during this process.The next step is to define functions and target performances for realizing the product concept and determine the technologies and their combinations that need to be applied. Advanced technologies are part of the technologies intended for application. To develop a technology for product application, its functionality and performance are enhanced to transform it into a new value. Multiple reviews are conducted to ensure that customers can comfortably and easily use the technology at all times and that the final product is easy to comprehend and operate. During this process, it is essential to investigate the required functionality and performance by considering the different ways in which the product will be used.After the functionality and target performance of a vehicle are defined, the next step involves performing a detailed design of the systems and parts necessary to achieve the functionality and target performance. To achieve the targets of a vehicle in a complex system, it is necessary to allocate performance targets to the systems and parts and then verify the level of achievement of each target. This activity is the so-called performance-design process. This is an important product development process. Technologies for performing system-level and part-level tests and simulations play an important role in this process. As featured in this technical review, improvements in testing and simulation technologies have enabled the evaluation of elements and systems in the design phase, contributing significantly to improving the level of design assurance. Nissan is also committed to analyses using digital technology, which reproduces actual vehicle-level events in cyberspace in real time.Using virtual reality (VR) technology, events based on tests and measurements are reproduced and verified in advance during the development and design phases. Models with actual dimensions can be evaluated in cyberspace. For example, a VR experience that reproduces the visibility according to the driverʼs actions (e.g., driving) can be realized if not only the design information but also the environment outside the vehicle (e.g., the surrounding environment 360■ around the vehicle and the surrounding environment for the travelling distance) are reproduced when evaluating drivability, such as 2
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