Determination of flow-rate characteristics and parameters of piezo pilot valves Jakub Takosoglu, Paweł Laski, Slawomir Blasiak, Gabriel Bracha, Dawid Pietrala, Jaroslaw Zwierzchowski and Lukas Nowakowski EPJ Web Conf., 143 (2017) 02126 Published online: 12 May 2017 DOI: 10.1051/epjconf/201714302126