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Ba(Ce,Zr,Pt)O3-perovskite is a new intelligent catalyst that shows self-regeneration of the precious metal. We previously reported that a Pd-perovskite catalyst, La(Fe,Pd)O3, regenerates itself through solid solution and segregation of Pd into and out of the perovskite crystal. We investigated the improvement of the oxygen-storage capacity (OSC) of an intelligent catalyst by means of suppressing the grain growth of the precious metal. The new intelligent catalyst is a composite comprising Ba(Ce,Zr,Pt)O3 perovskite formed on a CeZr oxide. We examined the self-regenerative function of the new material and tested its OSC and catalytic activity after engine aging at high temperature. The new intelligent catalyst was shown to have excellent durability of OSC and excellent catalytic activity.

We have developed a revolutionary automotive catalyst that maintains high activity by the suppression of grain growth of precious metals. This catalyst contains Pd-perovskite crystal which has shown a capacity for self-regeneration of Pd in a cycle of solid solution and segregation in perovskite crystals [1, 2, 3, 4, 5 and 6]. We named this catalyst the “Intelligent Catalyst” and first commercialized it in the Japanese market in October 2002 [7, 8]. In this study, we investigated the activity of Pd at various temperatures to confirm that the self-regenerative mechanism worked well at low temperatures like those right after engine starting. We also examined the durability of perovskite structure at high temperatures and tested its catalytic activity after engine aging at high temperatures above 1000 °C up to 1100 °C. It is proved that the intelligent catalyst has both excellent activity and durability under practical conditions.

We have already reported that a LaFeCoPdO3 perovskite catalyst has the function for self-regeneration of Pd [1, 2, 3, 4, 5 and 6]. But cobalt was recognized as an environmental burden. In order to prepare for its practical application, we examined the composition of perovskite without cobalt. In this paper, we have investigated the catalytic activity, the structural durability and the regenerative ability of Co-free perovskites LaFePdO3, in comparison with LaFeCoPdO3 and Pd/Al2O3. As a result, the structural durability of LaFePdO3 is high, and the light-off performance is excellent even after aging. “Co-free Intelligent Catalyst” is regarded as the next technology for practical use especially as it is efficient in the reduction of emissions at cold starting.

In spring 1987 Sumitomo Electric Ind. Ltd.(SEI) started production of an electronic antilock system for a Japanese car manufacturer. Features of this system are: 1. Extremely reliable due to - separate hydraulic control circuit. - dual electronic circuit. - self diagnostic function. 2. Improved pedal feel by using cut-off valves. 3. Easy addition of traction control system. This paper contains the basic concepts and details the components that make up the system.