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The orientation of electrodeposited Pb alloy crystal was related to the morphology of the deposits, and the orientated electrodeposits of a Pb alloy mainly consisting of the (h00) plane have exhibited a good wetness characteristic for lubricant oil. As a result, the orientated electrodeposits of this Pb alloy used in the overlay of bearings has an anti-seizure parameter (PV) at least 30% higher than that of conventional deposits in terms of the sliding characteristic. The sintered lead-bronze alloy used as the bearing's lining material offers good fatigue strength, which was made possible by adopting a newly developed Cu-Sn alloy matrix and reducing the amount and grain size of the Pb phase. Studies on plane bearings of high performance have clarified through bearing characteristic and engine firing tests that combining the orientated Pb alloy overlay and strengthening the lining increases the anti-seizure property and improves durability with regard to bearing fatigue and wear.

In recent years, fuel efficiency has been improved by using many technologies such as downsizing engine, turbocharger and direct injection to reduce CO2 emissions from vehicle. However, the temperature of the exhaust gas from the engines using these technologies becomes lower than that form conventional one. That increases the difficulty for three-way catalyst (TWC) to purify CO, HC and NOx enough because TWC is not warmed up just after engine starting. In order to reduce cold emission mentioned above, we have been studying the warmup strategy of which the key property is thermal mass of TWC. To achieve early warmup, thermal mass of TWC is reduced by lightening the weight of (1) substrate and (2) catalytic materials, namely washcoat amount. Along with the strategy, we have developed TWC with lightweight substrate and applied it from the 2016 model year CIVIC.

This research is aimed at development of the catalyst for gasoline automobiles which uses only palladium (Pd) among platinum group metals (PGMs). And the conformity emission category aimed at LEV III-SULEV30. For evaluation, the improvement effect was verified for 2013 model year (MY) ACCORD (LEV II-SULEV) as the reference. As compared with Pd-rhodium (Rh) catalyst, a Pd-only catalyst had the low purification performance of nitrogen oxides (NOx), and there was a problem in the drop in dispersion of Pd by sintering, and phosphorus (P) poisoning.