The pin is defined as the signal ground, which is the output of the intake air temperature signal, and the output of the intake air pressure signal when the 5V power supply is added. The sensor is composed of two sensors, namely, the intake manifold absolute pressure sensor and the intake temperature sensor, which are installed on the intake manifold. The intake temperature sensor assembly is a resistor with a negative temperature coefficient NTC, and the resistance changes with the intake temperature.
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The working principle of the intake pressure sensor
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The intake pressure sensor detects the absolute pressure of the intake manifold behind the throttle valve, which detects the absolute pressure change in the manifold according to the engine speed and load, and then converts it into a signal voltage and sends it to the engine control unit ECU, which controls the basic fuel injection amount according to the size of the signal voltage.
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There are many kinds of inlet pressure sensors, such as varistor capacitive type, because the varistor type has the advantages of fast response time, high detection accuracy, small size and flexible installation, so it is widely used in the D-type injection system. The pressure sensor uses the pressure chip for the measurement of pressure, and the pressure chip integrates Wheatstone bridge on the silicon diaphragm where pressure deformation can occur.