Requires the use of a jack, 8-10 open-end wrenches, box wrenches, adjustable wrenches, and other backup tools. The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system. It converts harmful gases such as CO, HC, and NOx emitted by automobile exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction. Below is the relevant introduction: Working principle: When high-temperature automobile exhaust passes through the purification device, the purifying agent in the three-way catalytic converter enhances the activity of the three gases—CO, HC, and NOx—promoting certain oxidation-reduction chemical reactions. Among them, CO oxidizes at high temperatures into colorless, non-toxic carbon dioxide gas; HC compounds oxidize at high temperatures into water and carbon dioxide; and NOx reduces into nitrogen and oxygen. The three harmful gases are transformed into harmless gases, thereby purifying the automobile exhaust. Composition: The three-way catalytic reactor resembles a muffler. Its exterior is made of double-layer stainless steel thin plates formed into a cylindrical shape. The interlayer between the double-layer thin plates contains heat-insulating material—asbestos fiber felt. Inside, purifying agents are placed between mesh partitions. The purifying agent consists of a carrier and a catalyst. The carrier is generally made of aluminum oxide, with shapes including spherical, polyhedral, and mesh partitions. The purifying agent actually serves a catalytic function and is also referred to as a catalyst. The catalysts used are the metals platinum, rhodium, and palladium. Spraying one of these onto the carrier forms the purifying agent.
