AIR FUEL RATIO (A/F) SENSOR CONSTRUCTION/OPERATION [MZR-CD 2.2]SM1934929
AIR FUEL RATIO (A/F) SENSOR CONSTRUCTION/OPERATION [MZR-CD 2.2]
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• Installed to the rear of the oxidation catalytic converter.
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• The wide-range air/fuel ratio sensor is a pump cell type sensor, using both oxygen concentration cell action and oxygen pump cell action, and can detect the oxygen concentration (air/fuel ratio of the air-fuel mixture) in the exhaust gas in all ranges, from lean to rich.
• A heater is built into the sensor to facilitate the activation of the A/F sensor at engine startup (when the exhaust gas temperature is low).
Operation
• The wide-range air/fuel ratio sensor converts the oxygen concentration in the exhaust gas into a current value, and sends the value to the PCM.
• The PCM calculates the λ (lambda) value of the air-fuel mixture based on the received current value.
