Volume flow or pressure change determining method for piston pump, involves calculating volume flow or pressure change using mathematical models utilizing linear approach for obtaining coefficient of piston pump

摘要

The method involves calculating volume flow discharged from a piston pump or a proportional factor such as pressure change, using mathematical models that utilize linear approach for obtaining a coefficient of the piston pump, where the coefficient is confined to a minimal value. The coefficient is calculated by taking into consideration a temperature-independent parameter and speed of pump. The parameter is estimated by taking into account the secondary-side pressure and a temperature-independent factor. An independent claim is also included for a control device comprising a unit for determining volume flow discharged from a piston pump or a proportional factor such as pressure change.