|
|
(close to 100mV). The signal voltage will mutate near theoretical equivalent air-fuel ratio (λ=1), see the figure above.
Every oxygen sensor bears a cable and the other end of the cable is the wire connector. The wire connector of oxygen sensor produced by our company has four pins: No.1 connects to the positive pole of heater power supply (white); No.2 connects to the negative pole of heater power supply (white); No.3 connects to signal negative pole (gray); No.4 connects to signal positive (black).
7.3 Parameters of technical features sensor must be heated up rapidly. If possible, the exhaust pipe should be designed to be tilting down to avoid accumulation of condensed water in front of the oxygen sensor. l Do not inappropriately heat up the metal snap ring of the cable at oxygen sensor side, especially after the engine is shut down. l Do not apply purge fluid, oiliness fluid or volatile solid on connector of the oxygen sensor. × 1.5. l The size of the hexagonal head wrench for the oxygen sensor is 22-0.33. The tightening torque for the oxygen sensor is 40-60Nm.
7.4 Failure effects and judgment method consumption etc. l General causes of the failure: 1. Moisture entering inside of sensor, and when the temperature is changed, the pin will be broken; 2. The oxygen sensor “intoxicates”. (Pb, S, Br, Si) Maintenance precautions: application of cleaning fluid, oiliness fluid or volatile solid on the oxygen sensor during maintenance is prohibited. 1. Remove joint, put digital multimeter to ohm shift, connect meter pen to No.1 (white) and No.2 (white) pins of the sensor. The resistance value is 1~6 Ω at constant temperature. 2. With the joint connected, under idle speed state, when the working temperature of the oxygen sensor reaches 350 , turn the digital multimeter to DC Voltage shift and connect the two meter pens ℃ respectively to 3# (gray) and 4# (black) pins; at this point, the voltage should fluctuate rapidly between 0.1-0.9V.
Main relay 者 87# Oxygen sensor |