Oxygen Sensor

来源: 网络
时间: 2013-12-11

The oxygen sensor detects the oxygen content in the engine exhaust and sends a corresponding voltage signal to the electronic control unit (ECU) to reflect whether the air fuel mixture ratio is lean or rich. The ECU will control the amount of fuel injection amount and intake air accordingly, so that the engine operates in the optimal air fuel mixture ratio state, thereby creating ideal conditions for the exhaust gas treatment of the three-way catalyst. If the mixture is too rich, the amount of fuel must be reduced. If it is too thin, it then increases the amount of fuel.


In the conventional engine management system, there is only one oxygen sensor, which is called the control oxygen sensor and installed in the upstream position of the three-way catalyst. Newer car is equipped with a diagnostic oxygen sensor installed at the downstream end of the three-way catalytic converter. The main reason: the control oxygen sensor will shift due to aging, and the voltage signal curve sent to the ECU will be offset. The diagnostic oxygen sensor will detect whether the control oxygen sensor is still in the best working condition, and then the ECU can calculate amount of compensation needed for the correction offset.


Product Feature


1. Faster ignition

2. Lower heating power

3. Low cost in driving

4. Lower dependence on exhaust temperature

5. Double protection tube head against various shocks

6. Good anti-aging properties

7. Anti-coating type and anti-toxicity

8. Compact structure (high vibration level)

9. Longer service life  

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