METHOD AND DEVICE FOR MEASURING THE INJECTION QUANTITY AND THE INJECTION RATE OF AN INJECTION VALVE FOR LIQUIDS

摘要

Method of measuring the injection quantity and the injection rate of an injection valve for liquids, preferably for liquid fuel, in which the injection valve (3) injects the liquid into a liquid-filled measuring volume (1), wherein the measuring volume (1) is closed off all round and a pressure sensor (20) is arranged in the measuring volume. The speed of sound is determined from a separate measurement and thus the total injection quantity (?m) and/or the time characteristic of the injection rate (r(t)) is calculated. The device comprises a measuring volume (1), an injection valve (3) which projects with at least one injection opening (12) into the measuring volume (1), and a sound transducer (30) which can emit a sound signal and receive its echo.