/ 149 FLOW MEASUREMENT FOR COMPONENT TESTING The AVL product line PLU 131 offers a wide range of high precision flow meters for all kinds of applications in various fields of combustion engines. In addition to standard flow meter versions for all kinds of fuels and test fluids, specialized models for water or urea solution are available. Other device types have been designed for high media pressure up to 200 bar and high media temperature up to 150 °C. The different measuring ranges cover everything from small quantity measurement of 0.05 l/h to high flow rates of 300 l/h. The measurement accuracy is 0.1 % of the measured value over the complete measuring range of the individual device types of up to 1:500. MEASUREMENT PRINCIPLE The dual PLU measuring principle entails the combination of a rotatory and a translatory positive displacement meter. The servo-controlled gear counter determines the flow volume from the rotation. The dynamic piston sensor controls the engine speed and ensures zero pressure difference (Δp = 0) between inlet and outlet. This prevents internal leakage flow in the sensor. Over the complete measuring range, the measuring device generates no pressure difference in the hydraulic system being measured. APPLICATION The main fields of application of the PLU 131 are test benches and production lines for automotive fuel supply components. The PLU measurement principle is suitable for pulsating flows and can be applied in direct hydraulic adaptation for the testing of pumps, injectors and control valves on the inlet (upstream) side as well as on the outlet (downstream) side. AVL PLU 131 sensors increase measurement accuracy and reduce measuring time for continuous flow measurement. BENEFITS AT A GLANCE • Reduced measurement time due to high-precision flow rate measurement • High flexibility due to broad range of media compatibility and extremely large measuring ranges • Reliable results with upstream measurement (high-pressure side) and non-interference between meter and hydraulic system (Δp = 0) • Low cost of ownership due to outstanding robustness and long-term stability of calibration AVL PLU 131F, PLU 131S, PLU 131U
Solutionskatalog2016_EN
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