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An air-fuel ratio meter monitors the air–fuel ratio of an internal combustion engine. Also called air–fuel ratio gauge , air–fuel meter , or air–fuel gauge , it reads the voltage output of an oxygen sensor , sometimes also called AFR sensor or lambda sensor.
1 Benefits of air–fuel ratio metering. 2 Sensor types. Toggle Sensor types subsection. 2.1 Zirconia oxygen sensor. 2.2 Titanium oxygen sensor. 2.3 Narrow-band sensor.
By monitoring EGT, the driver or pilot can get an idea of the vehicle's air-fuel ratio (AFR). At a stoichiometric air-fuel ratio, the exhaust gas temperature is different from that in a lean or rich air-fuel ratio. At rich air-fuel ratio, the exhaust gas temperature either increases or decreases depending on the fuel.
To prevent the Air-fuel ratio from going lean (caused by increasing the boost beyond the fuel systems capacity) care must be taken to monitor boost pressure levels, along with oxygen levels in the exhaust gas, using an air-fuel ratio meter that monitors the oxygen sensor. [7]
Air flow meter; Air–fuel ratio meter; Blind spot monitor; Crankshaft position sensor (CKP); Curb feeler; Defect detector; Engine coolant temperature sensor; Hall effect sensor
The ECU is a control system that uses feedback from the sensor to adjust the fuel/air mixture. As in all control systems, the time constant of the sensor is important; the ability of the ECU to control the fuel–air ratio depends upon the response time of the sensor. An aging or fouled sensor tends to have a slower response time, which can ...
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