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What is the function of engine sensors?

1 Answers

OJackson

07/29/25 6:01pm

Engine sensors have the following functions: 1. Air flow sensor: Measures the amount of air entering the engine and is installed on the air bypass channel; 2. Intake pressure sensor: Detects changes in the negative pressure of the intake manifold to determine the engine's air intake volume; 3. Engine speed and camshaft position sensor: Used to measure engine speed and confirm the crankshaft position signal; 4. Throttle position sensor: Includes a linear throttle potentiometer and an idle switch. The former provides the ECU with data to control fuel injection volume and ignition timing, while the latter informs the ECU when the throttle is in the idle state; 5. Coolant temperature sensor: Measures the temperature of the engine coolant; 6. Intake temperature sensor: During engine operation, the mass of air entering the engine is related to the intake temperature and atmospheric pressure. When the intake temperature is low, the air density is higher, resulting in a greater mass for the same volume of gas. Conversely, when the intake temperature is high, the mass of the same volume of gas is smaller; 7. Knock sensor: Detects whether the engine has a knocking phenomenon; 8. Oxygen sensor: Measures the oxygen content in the exhaust gas; 9. Vehicle speed sensor: Measures the vehicle's driving speed.

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