The most important outdoor purification device installed in automobile exhaust system can convert harmful gases such as CO, HC and nitrogen oxides in automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction.
When the high-temperature automobile exhaust gas passes through the purification device, the purifying agent in the three-way catalyst will enhance the activity of CO, HC and nitrogen oxides, prompting them to carry out certain redox chemical reactions, in which CO is oxidized into colorless and nontoxic carbon dioxide gas at high temperature; HC compounds are oxidized to water (H2O) and carbon dioxide at high temperature; Nitrogen oxides are reduced to nitrogen and oxygen. Three kinds of harmful gases are changed into harmless gases, thus purifying automobile exhaust.
Three-way catalytic converter is the most important off-site purification device installed in automobile exhaust system, which can convert harmful gases such as CO, CO, HC hydrocarbons and nitrogen oxides in automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction. This catalyst is called ternary because it can convert three main harmful substances in waste gas into harmless substances at the same time.
Several methods to prevent ternary frequency converter from being damaged;
1, don't use leaded gasoline.
2. Don't run fast for a long time (open-loop control state).
3, don't let the engine speed fast and slow.
4. The ignition time should not be too late.
5, unable to start for a long time.
6. Don't pull the high-voltage line for a long time to test the fire.
7. When measuring the cylinder pressure, unplug the central control connector of the fuel pump to prevent the fuel injector from injecting fuel into the cylinder.
8, found that the cylinder work is bad, should stop in time to check, troubleshooting.
9. Avoid many factors such as the fuel injector is not tightly closed, the fuel pressure regulator fails (the oil pressure is too high), the oxygen sensor fails, and the air flow sensor fails.
10, as long as the catalyst is used correctly, it generally does not need maintenance and should not be disassembled casually. If it needs to be replaced, it must match the engine.
Refer to Baidu Encyclopedia-Three-way Catalytic Converter for the above contents.