What is the function of the automobile intake pressure sensor?

The function of the automobile intake pressure sensor is to connect the intake manifold with a vacuum tube, sense the change of vacuum degree in the intake manifold under different engine speed loads, and then convert the change of internal resistance of the sensor into a voltage signal for ECU to correct the fuel injection quantity and ignition timing angle. And widely used in D-type injection system.

Step 2 introduce

The invention relates to an intake pressure sensor, which is an automobile and aviation part. The English name is ManifoldAbsolutePressureSensor, or MAP for short. The intake pressure sensor indirectly detects the intake air volume, instead of directly detecting it like the intake air flow sensor. At the same time, it is also affected by many factors, so there are many differences in the detection and maintenance of intake flow sensor, and the faults caused by it also have their particularity.

3. Working principle

The intake pressure sensor detects the absolute pressure of the intake manifold behind the throttle. It detects the change of absolute pressure in the manifold according to the engine speed and load, and then converts it into signal voltage and sends it to the ECU. The ECU controls the basic fuel injection quantity according to the signal voltage.