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In this paper, the author analyzes automotive safety issues with respect to the application of electronic technology and presents several development targets for the future. The functions expected of the automobile have been changing steadily in Japan. Environmental concerns, for instance, have taken on increased importance and must be factored into vehicle design during the development process. Safety and security issues also impose rigorous requirements on vehicle design. Various efforts are under way to apply electronic technology to driver support systems and devices with the aim of enhancing safety, though numerous problems remain to be solved.

An electronically controlled closed-loop carburetor system has been developed for production application in Datsun car models. Providing a means of complying with Japanese Emission Standards, this design features the electronic control of carburetor supplied fuel with significantly improved emission performance and fuel economy. Technological advances include the noteworthy compensation of oxygen sensor output variations and improved transient emission.

An electronically controlled closed-loop carburetor system has been developed. This system's air-fuel ratio control is characterized by the air bleeds being controlled by turning the solenoid valves on and off at a constant frequency. The frequency above 30 Hz was desirable for practical performances. Some improvements and developments were made to the carburetor, the solenoid valve and the control unit. In application of this system to a three-way catalytic system with O2 sensor, the emissions met the 1978 Japanese standards.