SYSTEM FOR REDUCING POLLUTANTS, VEHICLE AND METHOD FOR REDUCING POLLUTANTS

摘要

systems for reducing pollutants in an exhaust gas stream from an internal combustion engine, including a hydrogen injection article configured to introduce hydrogen upstream of a catalyst article, are effective in reducing carbon monoxide and / or hydrocarbons and / or nitrogen oxides. the introduction of hydrogen may be intermittent and / or during a cold start period.