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Oxygen storage components (OSC) based on cerium (Ce) were investigated for their ability to reduce the oxidation temperature of diesel particulate matter (DPM). Among the materials investigated, a cerium-praseodymium (Ce-Pr) composite oxide provided the largest reduction in DPM oxidation temperature. Oxygen isotope tracer experiments revealed that oxygen released from the cerium oxidized the DPM at a lower temperature than the oxygen from the exhaust.

We were the first in the world to start mass-producing the fiber optic gyroscope for an automobile navigation system. The fiber optic gyroscope was installed in an automobile in order to improve position detection accuracy. However, mass-producing the fiber optic gyroscope for an automobile navigation system was not possible before because it was difficult to achieve the high performance required under many operating conditions, especially in wide temperature ranges between -20 °C∼70°C. In order to overcome these problems, we have developed a new signal processing for a fiber optic gyroscope having the compensation functions of cancelling the fluctuation of the optical signal. The navigation system using this gyroscope has been installed in the Nissan Motor Company's 1991 CEDRIC, GLORIA, and CIMA models.

The Electronic Governor RED III for diesel in-line injection pumps was developed by Diesel Kiki, and introduced onto the market in 1983 as COPEC(Computed PE Control), which is a system for vehicles in combination with an electro-hydraulic timer. It has been well received by users because of its additional functions, i.e., auto-cruising etc, which enable the improvement of engine performance, drive-ability etc. This report presents firstly an analysis of the stability of the engine-governor system, and secondly an outline of the COPEC system from the point of view of engine stability, reliability, etc. Additionaly a growing need exists for electronic control of various functions, such as generator and construction machine operation. In this paper is also described how the control unit (C/U) answers these various needs, as the second stage of the first generation electronic control system.