Automobile Oxygen Sensor is a key feedback sensor in the control system of electric injection engine. It is also a key part to control automobile exhaust emission, reduce automobile pollution to environment and improve the quality of automobile engine fuel combustion. The oxygen sensor is installed on the engine exhaust pipe.
Application: Cars
Q: How do I know the O2 sensor is good or not? Suzhou Arenland Automotive Technology co.,ltd , https://www.arlautoparts.com
A: The only way to know if the O2 sensor is functioning normally is to check its responsiveness to changes in the air/fuel mixture, by Voltage Measurement or Waveform Simulation.
Use a 10-megaohm digital voltmeter. Hook up the voltmeter's red probe to the sensor's signal wire and the black probe to engine ground. (Use back probe method, DO NOT pierce the wire.) For a good sensor, voltage should fluctuate constantly between 0.1 and 0.9 volts after starting the engine for 2 or 3 minutes.
Common faults and maintenance methods of steam traps
First, traps installed after use, should be regularly maintained to ensure that the equipment is working properly. Under normal circumstances, check or maintain twice a year. Second, the normal work of the trap: Discharge of condensate intermittently, no steam leakage after closure. Condensation water sometimes discharge continuously, there is a continuous noise, and then closed sound, wait for a period of time, began to cycle. Third, the common fault there are several, Shanghai Lixing pump valve with the majority of users in this to be a simple analysis and introduction 1, no action is not condensate water, traps no sound for a long time, the valve surface temperature drops, this is Trap can not open the state. There are several reasons for this failure. (1) The plumbing or filter is contaminated with clogs and the condensate can not flow into the steam trap. The piping, filters and dirt in the valve must be cleaned. (2) due to water hammer float water damage can not float, you should replace the new float. (3) The pressure of steam equipment exceeds the maximum working pressure of the trap, so that the trap can not be opened. Replacement of higher working pressure trap or adjust to reduce the working pressure of steam equipment. (4) non-condensable condensate trap is hot, steam or steam generated secondary steam plugging phenomenon. Once the steam is condensed, the steam plug disappears. This is due to improper installation of traps, inlet pipe halfway there can be no place to stay condensate. (5) The amount of condensate discharged after the trap is very small or the action interval time specialty, it is necessary to replace the trap with a small capacity. 2, Steam trap leakage steam is not tight due to (1) spool, seat wear or seal Surface scratch, to re-grinding sealing surface or replace the new spool, seat. (2) The seat or seat body and valve cover (valve body) joints loose bolts, resulting in gasket leaks, gasket replacement, fastening bolts. (3) In the flange gasket damage caused by the trap valve body and bonnet junction leakage, replace the flange gasket, symmetrical, staggered, multiple, evenly tighten the flange bolts to prevent uneven circumferential force occurs leakage. (4) Trap valve body or valve cover leakage Casting shell trachoma, welding repair or replacement of the defective shell. 3, the trap does not close the discharge of the factors are: (1) Continuous condensate drain trap does not close the water, to replace the discharge capacity of the trap. (2) continuous water trap, steam the same row, between the spool and the valve seat or a foreign body between the folder of foreign matter, disintegration cleaning, remove foreign objects. (3) There is corrosion perforation near the exit of the shell, which can be disassembled and repaired or the corroded shell can be replaced. (4) damaged capsule or bimetal permanent deformation, so that the trap is not closed, it is necessary to replace the damaged capsule or failure of the bimetal. (5) mechanical type (lever float, free float, inverted barrel) trap installation error will have the same discharge phenomenon does not close the valve, must be installed according to the requirements of the installation diagram.