Solar term door behind not only reflects the degree of vacuum and reflects the absolute pressure, so some people think that the vacuum degree and absolute pressure is a concept, in fact this is a one-sided understanding. At atmospheric pressure under the same conditions (standard atmospheric pressure is 101.3kPa), manifold vacuum degree higher, reflecting lower absolute pressure in the manifold, vacuum degree equal to the atmospheric pressure in the manifold absolute Crankshaft Positioning Sensorminus the difference value. While the absolute pressure in the manifold is higher, the lower the degree of vacuum in the manifold, manifold absolute pressure equal to the external atmospheric pressure minus the manifold vacuum degree difference. Atmospheric pressure is equal to the vacuum degree and the absolute pressure and. Understanding the relationship between the atmospheric pressure, vacuum degree, absolute pressure, the output characteristics of the inlet pressure Crankshaft Position Sensor is clear. Engine work, solar term door opening is small, the intake manifold vacuum degree is high, the absolute pressure in the manifold is smaller, the output signal voltage is smaller. Solar term door opening is bigger, the intake manifold vacuum degree is small, the absolute pressure in the manifold is larger, the output signal voltage is greater. Size is inversely proportional to the output signal voltage and vacuum manifold (negative characteristic), and manifold absolute pressure is proportional to the size of the (performance).
The output characteristics of the inlet pressure pressure sensor: EFI engine with intake air pressure sensor to detect the intake air quantity called type D injection system (speed density model). Detection of the intake pressure Cooling Temp Sensor air intake than the intake flow Crankshaft Sensor Replacement that detected directly, instead of using indirect detection, and it is affected by many factors, so the detection and repair have many different from the weight Car Temperature Sensor intake flow pressure sensor fault generated by the price place, also has its particularity. When the engine works, along with the solar term door opening changes, the intake manifold vacuum, absolute pressure and output signal characteristics curves are in change. But the relationship between them is how to change? The output characteristic curve is positive or negative? This question is often not easy to be understood, so that some maintenance personnel have a "not sure" feeling at work. D type injection system is to detect the absolute pressure of the intake manifold, solar term door rear.