What role does the intake sensor of Sichuan Nanchong 120n natural gas engine play?

The intake sensor of Sichuan Nanchong 120n natural gas engine is used to detect the intake pressure, because the intake pressure will greatly affect the fuel distribution.

By measuring the pressure and temperature after intercooling, combined with the engine speed, displacement and charging efficiency, the velocity density method is used to calculate the mixture flow. According to the requirements of parts, it is installed on the intake pipe downstream of the electronic throttle. When installing, put the sensor temperature and pressure probe in the mixed airflow as much as possible to measure the correct values.

According to the engine speed and load, the change of vacuum degree in the intake manifold is detected, and then it is converted into signal voltage through the change of sensor internal resistance, and sent to the engine control unit (ECU), which controls and corrects the fuel injection amount and ignition timing angle according to the signal voltage.

The use of engine intake sensor;

The intake pressure sensor is located above the engine intake manifold. Intake pressure and temperature sensors should be installed on the automobile intake manifold, above the intake manifold to prevent water accumulation.

There are many forms of pressure sensors, which can be divided into piezoelectric type, semiconductor varistor type, capacitive type, differential transformer type and surface elastic wave type according to the principle of signal generation. Because of the advantages of fast response time, high detection accuracy, small size and flexible installation, varistor is widely used in D-type fuel injection system.