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Abstract
This paper presents the results of study on improvement of the efficiency of the motorcycle exhaust catalytic converter (Catalyst) during the engine cold start and warm up phase by the additional heating method of the catalyst by high-frequency electrical current. The study was carried out by the simulation method of the catalyst on Honda Lead 110 motorcycle. The study results showed that with a heating capacity of 400W maintained for 30 seconds (s) right after the engine was cold and started with fast idling at 2000 rpm, the convertor is activated very quickly, reducing the idle time of the catalyst during this period from 150s to 20s. Therefore, the emission conversion efficiency of the catalyst in this period is significantly improved, contributing to reducing the overall emissions of the vehicle.