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The automobile industry has been changing rapidly in recent years, and, in particular, a high growth in engine control technologies is taking place.
Until now, this technology has been concerned primarily with controlling the fuel and ignition systems.
Recently, however, there has been much interest towards controlling engine intake air volume so as to provide a migration path from the current technology in which the throttle valve is controlled directly through the accelerator cable to a drive-by-wire control using a microcomputer.
In support of this migration, Hitachi, using its accumulated mechatronics expertise, has developed both an electronic throttle control system that is capable of controlling the intake air volume as well as an insert type hot-wire airflow sensor that can accurately measure the intake air volume.