Working principle of intake pressure sensor

The working principle of intake pressure sensor is to sense the change of vacuum degree in intake manifold, and then convert the internal resistance of sensor into voltage signal for ECU computer to correct fuel injection quantity and ignition timing angle.

The following is an introduction of the intake pressure sensor:

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 engine control unit (ECU), which controls the basic fuel injection quantity according to the signal voltage.

The intake pressure sensor has three angles:

1 Pin is the signal wire, Pin 2 is the ground wire and Pin 3 is the reference power wire.

Functions of intake pressure sensor:

1. Check the intake pressure in the exhaust pipe behind the throttle, calculate the intake air volume, and determine the basic fuel injection quantity and basic ignition advance angle. The higher the intake pressure, the more intake air and fuel injection, and the smaller the ignition advance angle.

2. Monitor the waste gas circulation and the recovery of steam in the fuel tank.

3. It is used in conjunction with the intake flow sensor to improve the detection accuracy.

Type of intake pressure sensor:

1. Voltage type pressure sensor.

2. Frequency pressure sensor.

3. Capacitive intake pressure sensor.

4. Surface acoustic wave inlet pressure sensor. Million car purchase subsidy