The intake pressure sensor is also measuring the air intake, there has been an air flow meter, but also the intake pressure sensor is not redundant, mainly talking about the intake pressure sensor!
The EFI engine has two kinds, one is L type (air flow meter) D (air pressure sensor) air flowmeter is direct detection of air intake, the intake pressure sensor is the indirect calculation of air intake, air flow meter installed in front of solar term intake pressure sensor, mounted on the rear door behind the change of solar term, vacuum to calculate the intake air quantity through the opening size of the solar term, solar term door opening rear vacuum small. The throttle valve has a small opening and a large degree of vacuum behind it. The intake pressure sensor has a resistance, capacitance, and resistance.
Air flow meter is a measure of the intake air flow in the air filter after the solar term door, and the inlet pressure sensor is measuring Zhi intake pipe pressure, generally resist car without air flow meter. Mainly depends on the intake pressure sensor, and the general intake pressure sensor and the intake temperature sensor is one.
The pressure sensor is the indirect measurement of air volume, expansion and contraction phenomenon in physics, but also to adapt to the gas, the outside temperature will affect the measurement accuracy of numerical sensor, and a sensor can improve the measurement accuracy. The air flow meter is measured directly, through direct and indirect measurement to ECU data accurate fuel injection quantity is more reasonable
