Sensor
An oxygen sensor, also known as a lambda sensor, continually detects the oxygen content in the exhaust gases of an engine. The oxygen sensor output signal informs the vehicle's ECU (Electronic Control Unit) whether the AFR (Air-Fuel Ratio) is lean or rich. based on this, the ECU adjusts the amount of fuel injected into the engine to achieve an optimal AFR.

As a key componet in the automobile emission control system, oxygen sensors are widely used in modern automobiles to control the fuel and ignition systems to optimize a car's performance in the areas of emissions and fuel economy. Oxygen sensor measures oxygen in emission, it means engine combustion could be controlled by optimizing catalytic converter. Result: Minimize the emission, optimize engine performance, save fuel consumption up to 15%.

Exhaust emission standards and limit values are becoming stricter and stricter. The trend in emission values clearly shows that oxygen sensors have become indispensable in the fight to reduce exhaust emissions efficiently. In China, there are more than 15 million passenger cars equipped with gasoline engine. Many newer vehicles actually have two or more oxygen sensors.