Operating principle
Measuring the blow-by volume flow presents a significant challenge due to the high temperatures, pressure fluctuations, aggressive combustion by-products, saturated oil vapors, and fine oil droplets. It requires very robust measurement technology. Besides the frequently used method of determining the flow by measuring the pressure drop across an orifice, vane anemometers have shown themselves to be particularly suitable for this purpose as they cause a significantly lower pressure drop. A vane anemometer uses the direct relationship between the gas velocity and the rotational speed of a rotor to measure the volume flow.
Did you know?
The blow-by volume flow enables conclusions to be drawn regarding engine wear.
To draw conclusions about the operating status of an oil mist separator, information about its pressure loss and the blow-by volume flow are both important.
The pressure loss of a filter depends not only on the standard volume flow, but also on the prevailing temperature and pressure of the medium.