BMW N55 Direct Fit Catalytic Converter Replacement

The Three Way Catalytic Converter can reduce the exhaust pollution of the engine and is an essential component. As the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification capacity of the three-way catalyst for CO, HC and NOX will be sharply reduced, so the oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in the exhaust gas, and sends a feedback signal to the ECU, and then the ECU controls the increase or decrease of the fuel injection of the injector, so that the air-fuel ratio of the mixture is controlled near the theoretical value.

 three-way catalytic converter: mainly used to purify harmful gases in automobile exhaust. The three-way catalytic converter is equipped with a filter device and a purifier, just like the filter device of a water purifier. When the harmful gas passes through the three-way catalytic converter, the purifier absorbs the harmful gas, and a chemical reaction occurs to become a harmless gas.