How to eliminate the common breakdown oxygen thermocouple sensor

Once oxygen thermocouple sensor failure, will make the electronic fuel injection system of computer information cannot be given oxygen concentration of exhaust pipe, and therefore cannot be feedback control of air-fuel ratio, can make the engine fuel consumption and exhaust pollution increase, engine, unstable idle speed of fault phenomena, the surge of fire. Therefore, must be timely troubleshooting or replacement.

1, oxygen thermocouple sensor poisoning: oxygen thermocouple sensor poisoning is frequent and difficult to prevention and control of a fault, especially often use leaded gasoline cars, even if is the new oxygen thermocouple sensor, can only work for thousands of kilometers. If only a slight lead poisoning, and then use a case of leaded gasoline, can eliminate the oxygen on the surface of the thermocouple sensor lead, make its restore normal work. But often because of too high exhaust temperature, and make the lead into the interior, hindered the diffusion of oxygen ions, make oxygen thermocouple sensor failure, then can only be replaced.

in addition, oxygen thermocouple sensor silicone poisoning are also common. In general, after burning gasoline and lubricating oil containing silicon compounds generated silica, silicone rubber sealing washer, improper use of organic silicon gas can make oxygen thermocouple sensor failure, and therefore to use good quality fuel oil and lubricating oil. To correctly choose and install rubber gasket, when repaired don't coating factory regulations on thermocouple sensor used outside of the solvent and anti-sticking agent, etc.

2, carbon deposition, because of bad engine combustion in thermocouple sensor surface carbon, oxygen or oxygen thermocouple sensors inside into the grease or dust, sediment, impede or block the outside air into the oxygen inside the thermocouple sensor, make oxygen thermocouple sensor output signal phrase, ECU can't correct air-fuel ratio in a timely manner. Produce carbon deposition, main show is rising oil consumption, emission concentration increased significantly. At this point, if the sediment removal, will return to normal work.

3, oxygen ceramic thermocouple sensor cataclastic: oxygen ceramic thermocouple sensor harder and more brittle than typing or using strong airflow purging with good thing, can make its disintegration and failure. Therefore, to be very careful when processing, found that the problem timely replacement.

4, heater resistance wire burn out: for heating thermocouple type oxygen sensor, if the heater resistance wire ablation, it is difficult to reach normal operating temperature and the thermocouple sensor. Replace the heater resistance wire.

5 internal wiring, oxygen thermocouple sensor break off: internal wiring.

more high quality thermocouple sensor

key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure thermocouple sensor, digital temperature thermocouple sensor