A three-way catalytic converter is a crucial on-board净化 device installed in the car's exhaust system. It converts harmful gases like CO, HC, and NOx emitted from the vehicle's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction processes. As the high-temperature exhaust passes through the purification unit, the catalyst in the three-way catalytic converter boosts the reactivity of CO, HC, and NOx gases, prompting them to undergo specific oxidation-reduction chemical reactions. CO is oxidized into colorless, non-toxic carbon dioxide at high temperatures; HC compounds are oxidized into water (H2O) and carbon dioxide; and NOx is reduced to nitrogen and oxygen. The three harmful gases are transformed into harmless ones, purifying the vehicle's exhaust.

Three-way catalytic converter, an essential off-car device installed in the vehicle exhaust system, converts harmful gases such as CO (carbon monoxide), HC (hydrocarbons), and NOx (nitrogen oxides) emitted from vehicle exhausts into harmless CO2 (carbon dioxide), water, and nitrogen through oxidation and reduction reactions. Due to its ability to convert the three main harmful substances in exhaust gases into harmless substances simultaneously, it is named "three-way."