AVL FLOWSONIX™ Air
Air consumption measurement device
Because air consumption is a vital reference value in emission certification, OEMs need to ensure an accurate measuring process to meet ever stricter regulations. Therefore, AVL has created the innovative AVL FLOWSONIX™ Air , an air consumption measurement device that is fast, accurate and robust.
How Does it Work?
AVL FLOWSONIX Air measures intake air mass flow with high accuracy, a large downturn ratio and fast response time. It consists of three components – the measuring head, evaluation unit and two short inlet and outlet pipes. These are designed to have as little influence on the engine as possible. Only a small pressure drop (0.25 kPa) occurs in the measurement head, which results in a negligible influence on the engine.
Its flexible design allows for a quick and easy installation on any engine type. With a wide measurement range of 1:70 this means that only two pipe diameters are required – light duty (DN 100) and heavy duty (DN 150).
Its < 5* DN up-stream and down-stream tubing needs little space. This small size, and a power consumption of just 25 W, results in a compact and efficient, yet powerful system.
Ultrasonic Measurement Technology
The FLOWSONIX Air uses an ultrasonic transit-time differential technique to accurately measure air mass flow in the intake. Two ultrasound pulses – one propagating into the air flow and one against it – are measured to determine air consumption.