oxygen sensors
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concentration of oxygen in exhaust gas, and send a feedback signal to ECU, and then ECU controls the increase and decrease of fuel injection quantity of fuel injector, so as to control the air-fuel ratio of air-fuel mixture near the theoretical value. Engine with reduced exhaust pollution
concentration of oxygen in exhaust gas, and send a feedback signal to ECU, and then ECU controls the increase and decrease of fuel injection quantity of fuel injector, so as to control the air-fuel ratio of air-fuel mixture near the theoretical value. Engine with reduced exhaust pollution