Smallest hydraulic flow rate measuring method for injection nozzle e.g. fuel injection nozzle, involves providing pressurization in cylinder by using weight placed over piston, and determining flow rate based on stroke during time period

摘要

The method involves arranging a test sample (8) whose flow rate per time unit is to be measured, with a medium (13) in a cylinder (2), where the sample flows through the cylinder and pressurization in the cylinder filled with the medium is provided by using weight placed over a piston (3). The flow rate is determined based on reclined piston stroke during a time period. The weight acting on the medium by the piston, is varied. Time period is pre-determined or the time period is measured. An independent claim is also included for a measuring arrangement for measuring smallest hydraulic flow rates, comprising a cylinder.