Nissan Qashqai 2.0l catalytic converter

When the engine exhaust gas is discharged through the exhaust pipe, the activity of C0, HC and NOx is enhanced due to the catalysis of the purifier in the ternary Three Way Catalytic Converter, so as to carry out the oxidation-reduction reaction, among which, C0 is oxidized to colorless, non-toxic C02 at high temperatures,HC compounds are oxidized to H20 and C02 at high temperatures, and NOx is reduced to N2 (nitrogen) and 02 (oxygen), so that the exhaust gas emissions of the engine are purified.

Third, "Direct- Fit Three Way Catalytic" blockage blockage fault performance

1. The first stage is the stage of slight blockage. At this stage, the chemical complex is adsorbed on the surface of the catalyst. It only shows that the exhaust gas purification function is reduced. Excessive exhaust emissions.

2. The second stage is the moderate plugging stage: the chemical complex has accumulated on the catalyst surface to a certain extent, and the exhaust back pressure increases at this stage. Fuel consumption increases, power decreases

3. The third stage is the stage of severe blockage. Due to the serious blockage, the working temperature of the "Exhaust Pipe Catalytic Converter" rises. High temperature sintering plugging is formed at the front end of the three-way Catalytic Converter.

4, high temperature sintering plugging. High temperature sintering plugging is divided into two types: one is metal sintering plugging. One is carbon deposit sintering coke plugging. It is determined by whether the use of lead and manganese antiknock agents in the fuel, this stage is manifested as a serious decline in power, often flameout, serious exhaust pipe burning red, and even cause spontaneous combustion of the vehicle.