What are the position functions of sensors in automobiles?

1.MAF is used to measure the air flow entering the engine and installed on the air bypass passage. 2. The intake pressure sensor (MAP) is installed on the intake manifold, which senses the intake volume of the engine by detecting the negative pressure change of the intake manifold. 3. The engine speed and camshaft position sensors are the most important sensors in the engine centralized control system, which are used to measure the engine speed and determine the crankshaft position. (These two kinds of sensors can be divided into three types: magnetic induction type, photoelectric type and Hall type. The installation parts are: inside the distributor, at the front and rear ends of the crankshaft, at the front and rear ends of the camshaft and near the crankshaft counterweight. 4. The throttle position sensor (TPS) is installed on the throttle body, including a linear throttle potentiometer and an idle switch. The former is used for ECU to control fuel injection quantity and ignition advance angle, and the latter is used for ECU to sense that the throttle valve is in idle state. 5 Coolant temperature sensor, water jacket installed on the engine cylinder head. Used to measure the temperature of engine coolant. 6. The air temperature sensor is installed in the air flowmeter or on the intake pipe behind the air filter, and its function is that when the engine is working, the air quality entering the engine is related to the intake temperature and atmospheric pressure. When the inlet temperature is low, the air density is high, and the mass of the same gas is large, while when the inlet temperature is high, the mass of the same gas is small. 7. The knock sensor (DH) is used to detect whether the engine knocks. Installation position Four-cylinder engines are usually installed on cylinders 2 and 3. 8. The oxygen sensor (O) is installed on the exhaust pipe to detect the oxygen content in the exhaust gas. 9. The speed sensor is used to measure the speed of the car and is installed in the transmission. These are the nine most important sensors in the car.