What material is the three-way catalytic converter made of?
1 Answers
The material of the three-way catalytic converter is aluminum oxide (Al2O3), and the outer shell is made of stainless steel. Its working principle is that when high-temperature automobile exhaust passes through the purification device, the purifying agent in the three-way catalytic converter enhances the activity of three gases (CO, HC, and NOx), carrying out certain oxidation-reduction chemical reactions to convert them into harmless gases. The reasons that cause the three-way catalytic converter to fail include: 1. Prolonged idling; 2. Delayed ignition timing; 3. Overly rich air-fuel mixture; 4. Engine burning oil; 5. Failure of the oxygen sensor; 6. Overheating due to incomplete cooling; 7. Cutting off the switch while the vehicle is in motion.