| Mass Flow Sensor |
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Information AboutMass Flow Sensor |
| CATEGORIES ABOUT MASS FLOW SENSOR | |
| flow meters | |
| mass | |
| engine sensors | |
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AN AUTOMOTIVE APPLICATION The most common application is in electronically controlled fuel systems for internal combustion engines. In this case the device is quite simple. A paddle projects into the intake airstream on a spring-loaded arm. The arm will be displaced against the spring by airflow. A position sensor determines the amount of displacement. This is particularly advantageous for this application; the amount of fuel required is proportional to the Mass of air admitted by the throttle and the displacement of the sensor paddle is determined by the velocity and density of the air passing by - in effect, the mass of the air passing per unit time. It is thus not necessary to directly sense the Manifold air density (a function of altitude, humidity, temperature, and throttle pressure drop) nor the velocity of the intake air, instead the mass flow sensor performs these calculations implicitly and using a very simple device. The Engine Management System will then calculate a proportionate amount of fuel to admit, which will also be varied by the power demanded and other conditions. This refined control ensures both economical operation at low power and higher power when such is required and maintains an appropriate fuel/air ratio under wide conditions of temperature, humidity, and altitude. |
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