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Both sensor designs output a 0.0–5.0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate, and both sensors have an intake air temperature (IAT) sensor incorporated into their housings for most post on-board diagnostics (OBDII) vehicles. Vehicles prior to 1996 could have MAF without an IAT.
A heated air inlet or warm air intake is a system commonly used on the original air cleaner assemblies of carburetted engines to increase the temperature of the air going into the engine for the purpose of improving the consistency of the air/fuel mixture to reduce engine emissions and fuel usage. [1]
intake air temperature; intake air mass flow rate sensor ; oxygen (lambda) sensor; throttle position sensor; wheel speed sensor; Secondary. Other functions include: ...
This is both more reliable and more precise than a three-dimensional cam. The engine control circuitry uses the engine map, as well as airflow, throttle valve, crankshaft speed, and intake air temperature sensor data to determine both the amount of injected fuel, and the injection timing.
Oxygen Sensor 7 AB: Air-Fuel Equivalence Ratio CD: Current 3B: 59: 4 Oxygen Sensor 8 AB: Air-Fuel Equivalence Ratio CD: Current 3C: 60: 2 Catalyst Temperature: Bank 1, Sensor 1 -40 6,513.5 °C + 3D: 61: 2 Catalyst Temperature: Bank 2, Sensor 1 3E: 62: 2 Catalyst Temperature: Bank 1, Sensor 2 3F
A typical naturally aspirated engine configuration employs one or the other, whereas forced induction engines typically use both; a MAF sensor on the Cold Air Intake leading to the turbo and a MAP sensor on the intake tract post-turbo before the throttle body on the intake manifold. MAP sensor data can be converted to air mass data by using a ...
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