What is the normal data stream range for an automotive intake pressure sensor?
1 Answers
The absolute pressure value in the intake manifold should be between 40-80 KPA, which is the normal range for the intake pressure sensor. When the engine is running, the intake manifold pressure will be lower than atmospheric pressure due to the suction effect created by the downward movement of the piston during the intake stroke. For a properly functioning engine, the magnitude and variation of vacuum in the intake manifold have fixed ranges and patterns. The level and stability of the intake manifold vacuum are related to factors such as the number of engine cylinders, rotational speed, sealing performance, ignition performance, air-fuel ratio of the mixture, and throttle opening. Throttle opening: The smaller the throttle opening, the greater the suction effect created by the piston during intake, resulting in higher intake manifold suction, greater vacuum, and lower intake manifold pressure. Engine speed: The higher the engine speed, the greater the suction effect during intake, leading to higher intake manifold suction, greater vacuum, and lower intake manifold pressure. Vacuum is related to both engine speed and throttle opening. If the throttle opening is constant, higher engine speeds result in greater vacuum. Sealing performance: Better sealing performance leads to higher intake manifold suction, greater vacuum, and lower intake manifold pressure. If the vacuum level deviates from the normal range, it indicates the presence of a certain engine fault.
