What is the service life of a three-way catalytic converter?
1 Answers
The service life of a three-way catalytic converter is between 80,000 and 100,000 kilometers. The specific lifespan depends on the vehicle's usage conditions, and it is also related to the quality of the fuel used and the driving environment. Composition of a three-way catalytic converter: A three-way catalytic converter generally consists of four parts: the shell, the damping layer, the substrate, and the catalyst coating. The shell is made of stainless steel to prevent oxide scale from falling off, which could clog the substrate. The damping layer is composed of gaskets or wire mesh pads, which serve to seal, insulate, and secure the substrate. To protect the substrate from damage caused by vibration, thermal deformation, and other factors, the gaskets are made of expanded mica and aluminum silicate fibers, bonded together with adhesive. The substrate is made of honeycomb-shaped ceramic material, although many are also made of metal (including stainless steel). The catalyst consists of precious metals such as platinum, rhodium, and palladium, which are sprayed onto the substrate to form the purifying agent.